CinGG Analog S-Video to Digital HDMI converter + ms2130 UHD HDMI-USB3 Capture card
https://www.mail-archive.com/[email protected]/msg05748.html I contine this new thread with an short extract from the long growing [Cin] ms2130 HDMI-USB3 UHD capture card - not quite as expected? But shouldn't a 422 and not a 420 output format be created? >> it seems in some cases ffmpeg not geared towards preserving most information, just picks up most commonly defined/first pixel format. >> Try mpeg2video as output codec, and/or specify pixel format (pix_fmt) more explicitly before output's filename? >>> Could you possibly examplify the latter? >>>> I think I just theorized ffmpeg may try to get some info from alsa device file directly, as it tries with /dev/video. But I never >>>> tried this way, so I can be totally wrong! ------------------------------- Instead of 50i (pal interlaced fields), I try 50 fps (progressive) that at least is a pal frequence. And yes, it seems from the output that ffmpeg uses mpeg1video as default output codec. Furter I try to combine the current line ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -t 20 -i /dev/video2 out-720x576_ms2130.mpeg with and utilize the syntax developed 2021 for "Blu-ray compliant MPEG-2 SD video with LPCM audio" ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -c:a pcm_s16be -f vob dv28.mpg and for the current ongoing "DVD compliant MPEG-2 Video and PCM Audio" ffmpeg -hide_banner -i dv01.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -flags +ilme+ildct dv01.mpg to first ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 -i /dev/video2 720x576_50p_ms2130.mpg Option b:v (video bitrate (please use -b:v)) cannot be applied to input url /dev/video2 -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to. Error parsing options for input file /dev/video2. Error opening input files: Invalid argument and next revised with no output. That is I need help to debug the syntax error: ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 0.000000, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55db77114f00] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf59.27.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc59.37.100 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
пт, 2 мая 2025 г., 22:37 Terje J. Hanssen <[email protected]>:
https://www.mail-archive.com/[email protected]/msg05748.html
I contine this new thread with an short extract from the long growing [Cin] ms2130 HDMI-USB3 UHD capture card - not quite as expected?
But shouldn't a 422 and not a 420 output format be created?
it seems in some cases ffmpeg not geared towards preserving most information, just picks up most commonly defined/first pixel format. Try mpeg2video as output codec, and/or specify pixel format (pix_fmt) more explicitly before output's filename?
Could you possibly examplify the latter?
I think I just theorized ffmpeg may try to get some info from alsa device file directly, as it tries with /dev/video. But I never >>>> tried this way, so I can be totally wrong!
-------------------------------
Instead of 50i (pal interlaced fields), I try 50 fps (progressive) that at least is a pal frequence.
And yes, it seems from the output that ffmpeg uses mpeg1video as default output codec.
Furter I try to combine the current line
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -t 20 -i /dev/video2 out-720x576_ms2130.mpeg
with and utilize the syntax developed 2021 for "Blu-ray compliant MPEG-2 SD video with LPCM audio"
ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -c:a pcm_s16be -f vob dv28.mpg
and for the current ongoing "DVD compliant MPEG-2 Video and PCM Audio"
ffmpeg -hide_banner -i dv01.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -flags +ilme+ildct dv01.mpg
to first
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 -i /dev/video2 720x576_50p_ms2130.mpg Option b:v (video bitrate (please use -b:v)) cannot be applied to input url /dev/video2 -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to. Error parsing options for input file /dev/video2. Error opening input files: Invalid argument
and next revised with no output. That is I need help to debug the syntax error:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 0.000000, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55db77114f00] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf59.27.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc59.37.100 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
well, I think framerate still 25 for 50i stream .... can you re-check last line with framerate parameter removed or changed back to 25?
Den 02.05.2025 21:42, skrev Andrew Randrianasulu:
пт, 2 мая 2025 г., 22:37 Terje J. Hanssen <[email protected]>:
https://www.mail-archive.com/[email protected]/msg05748.html
I contine this new thread with an short extract from the long growing [Cin] ms2130 HDMI-USB3 UHD capture card - not quite as expected?
But shouldn't a 422 and not a 420 output format be created?
>> it seems in some cases ffmpeg not geared towards preserving most information, just picks up most commonly defined/first pixel format. >> Try mpeg2video as output codec, and/or specify pixel format (pix_fmt) more explicitly before output's filename?
>>> Could you possibly examplify the latter?
>>>> I think I just theorized ffmpeg may try to get some info from alsa device file directly, as it tries with /dev/video. But I never >>>> tried this way, so I can be totally wrong!
-------------------------------
Instead of 50i (pal interlaced fields), I try 50 fps (progressive) that at least is a pal frequence.
And yes, it seems from the output that ffmpeg uses mpeg1video as default output codec.
Furter I try to combine the current line
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -t 20 -i /dev/video2 out-720x576_ms2130.mpeg
with and utilize the syntax developed 2021 for "Blu-ray compliant MPEG-2 SD video with LPCM audio"
ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -c:a pcm_s16be -f vob dv28.mpg
and for the current ongoing "DVD compliant MPEG-2 Video and PCM Audio"
ffmpeg -hide_banner -i dv01.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -flags +ilme+ildct dv01.mpg
to first
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 -i /dev/video2 720x576_50p_ms2130.mpg Option b:v (video bitrate (please use -b:v)) cannot be applied to input url /dev/video2 -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to. Error parsing options for input file /dev/video2. Error opening input files: Invalid argument
and next revised with no output. That is I need help to debug the syntax error:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 0.000000, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55db77114f00] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf59.27.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc59.37.100 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
well, I think framerate still 25 for 50i stream ....
can you re-check last line with framerate parameter removed or changed back to 25?
Ok, as this old post by my mistake already has been forwarded to the list and replied, I will follow it up later today, but need to rig rig up my camcorder and devices :)
Den 03.05.2025 13:00, skrev Terje J. Hanssen:
Den 02.05.2025 21:42, skrev Andrew Randrianasulu:
пт, 2 мая 2025 г., 22:37 Terje J. Hanssen <[email protected]>:
https://www.mail-archive.com/[email protected]/msg05748.html
I contine this new thread with an short extract from the long growing [Cin] ms2130 HDMI-USB3 UHD capture card - not quite as expected?
But shouldn't a 422 and not a 420 output format be created?
>> it seems in some cases ffmpeg not geared towards preserving most information, just picks up most commonly defined/first pixel format. >> Try mpeg2video as output codec, and/or specify pixel format (pix_fmt) more explicitly before output's filename?
>>> Could you possibly examplify the latter?
>>>> I think I just theorized ffmpeg may try to get some info from alsa device file directly, as it tries with /dev/video. But I never >>>> tried this way, so I can be totally wrong!
-------------------------------
Instead of 50i (pal interlaced fields), I try 50 fps (progressive) that at least is a pal frequence.
And yes, it seems from the output that ffmpeg uses mpeg1video as default output codec.
Furter I try to combine the current line
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -t 20 -i /dev/video2 out-720x576_ms2130.mpeg
with and utilize the syntax developed 2021 for "Blu-ray compliant MPEG-2 SD video with LPCM audio"
ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -c:a pcm_s16be -f vob dv28.mpg
and for the current ongoing "DVD compliant MPEG-2 Video and PCM Audio"
ffmpeg -hide_banner -i dv01.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -flags +ilme+ildct dv01.mpg
to first
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 -i /dev/video2 720x576_50p_ms2130.mpg Option b:v (video bitrate (please use -b:v)) cannot be applied to input url /dev/video2 -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to. Error parsing options for input file /dev/video2. Error opening input files: Invalid argument
and next revised with no output. That is I need help to debug the syntax error:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 0.000000, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55db77114f00] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf59.27.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc59.37.100 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
well, I think framerate still 25 for 50i stream ....
can you re-check last line with framerate parameter removed or changed back to 25?
Ok, as this old post by my mistake already has been forwarded to the list and replied, I will follow it up later today, but need to rig rig up my camcorder and devices
Finally ready, I had to recall a lot since 2023. ls /dev/video* /dev/video0 /dev/video1 /dev/video2 /dev/video3 for i in /dev/video*; do echo "$i"; udevadm info --query=all --attribute-walk --name=$i | grep -E "name"; done /dev/video0 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video1 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video2 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam" /dev/video3 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam" v4l2-ctl --list-devices USB 2.0 Camera: HD 720P Webcam (usb-0000:00:14.0-11.2): /dev/video2 /dev/video3 /dev/media1 USB3.0 UHD: USB3.0 UHD (usb-0000:00:14.0-3): /dev/video0 /dev/video1 /dev/media0 As seen the HDMI-USB3 capture card + the S-Video/HDMI converter (with the analog S-video camcorder) is now on /dev/video0 while the USB2 webcam is on /dev/video2 ffplay can playback the S-video camcorder's imaging stream Default without framerate specified: ffplay -hide_banner -f video4linux2 /dev/video0 [video4linux2,v4l2 @ 0x7fe3c0000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 0.000000, bitrate: 398131 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 398131 kb/s, 60 fps, 60 tbr, 1000k tbn [video4linux2,v4l2 @ 0x7fe3c0000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times ^Cterje@localhost:~> d= 2 aq= 0KB vq= 0KB sq= 0B With 25 fps specified: ffplay -hide_banner -f video4linux2 -framerate 25 /dev/video0 [video4linux2,v4l2 @ 0x7f7fa8000c80] The driver changed the time per frame from 1/25 to 1/30 [video4linux2,v4l2 @ 0x7f7fa8000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 0.000000, bitrate: 199065 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 199065 kb/s, 30 fps, 30 tbr, 1000k tbn [video4linux2,v4l2 @ 0x7f7fa8000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times ^Cterje@localhost:~> d= 0 aq= 0KB vq= 0KB sq= 0B With 30 fps specified: ffplay -hide_banner -f video4linux2 -framerate 30 /dev/video0 [video4linux2,v4l2 @ 0x7f3878000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 0.000000, bitrate: 199065 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 199065 kb/s, 30 fps, 30 tbr, 1000k tbn [video4linux2,v4l2 @ 0x7f3878000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times ----------------- But empty output file with ffmpeg: With 25 fps specified ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -i /dev/video0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_25fps_ms2130.mpg [video4linux2,v4l2 @ 0x560fe5926740] The driver changed the time per frame from 1/25 to 1/30 [video4linux2,v4l2 @ 0x560fe5926740] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 0.000000, bitrate: 199065 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 199065 kb/s, 30 fps, 30 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x560fe5926740] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x560fe5927140] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_25fps_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 30 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A [out#0/vob @ 0x560fe5928d00] video:0KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: unknown [out#0/vob @ 0x560fe5928d00] Output file is empty, nothing was encoded(check -ss / -t / -frames parameters if used) frame= 0 fps=0.0 q=0.0 Lsize= 0KiB time=N/A bitrate=N/A speed=N/A Without framerate specified: ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -i /dev/video0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_ms2130.mpg [video4linux2,v4l2 @ 0x55e707fd8740] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 0.000000, bitrate: 398131 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 398131 kb/s, 60 fps, 60 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55e707fd8740] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55e707fd9140] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 60 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A [out#0/vob @ 0x55e707fdacc0] video:0KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: unknown [out#0/vob @ 0x55e707fdacc0] Output file is empty, nothing was encoded(check -ss / -t / -frames parameters if used) frame= 0 fps=0.0 q=0.0 Lsize= 0KiB time=N/A bitrate=N/A speed=N/A -------------- On the other hand, capturing with the USB webcam creates output file Here with 50 fps specified ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x56418fd52740] The V4L2 driver changed the video from 720x576 to 800x600 [video4linux2,v4l2 @ 0x56418fd52740] The driver changed the time per frame from 1/50 to 1/20 Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 1969.283514, bitrate: 153600 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 800x600, 153600 kb/s, 20 fps, 20 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [mpeg2video @ 0x56418fd53200] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 800x600, q=2-31, 8000 kb/s, 20 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A [out#0/vob @ 0x56418fd54e00] video:13281KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 1.230734% frame= 284 fps= 22 q=2.0 Lsize= 13444KiB time=00:00:14.15 bitrate=7783.3kbits/s dup=97 drop=0 speed=1.08x Exiting normally, received signal 2. ffprobe -hide_banner 720x576_50p_ms2130.mpg Input #0, mpeg, from '720x576_50p_ms2130.mpg': Duration: 00:00:14.20, start: 0.550000, bitrate: 7755 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 800x600 [SAR 1:1 DAR 4:3], 20 fps, 20 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 vbv_delay: N/A
вс, 4 мая 2025 г., 01:37 Terje J. Hanssen <[email protected]>:
Den 03.05.2025 13:00, skrev Terje J. Hanssen:
Den 02.05.2025 21:42, skrev Andrew Randrianasulu:
пт, 2 мая 2025 г., 22:37 Terje J. Hanssen <[email protected]>:
https://www.mail-archive.com/[email protected]/msg05748.html
I contine this new thread with an short extract from the long growing [Cin] ms2130 HDMI-USB3 UHD capture card - not quite as expected?
But shouldn't a 422 and not a 420 output format be created?
it seems in some cases ffmpeg not geared towards preserving most information, just picks up most commonly defined/first pixel format. Try mpeg2video as output codec, and/or specify pixel format (pix_fmt) more explicitly before output's filename?
Could you possibly examplify the latter?
I think I just theorized ffmpeg may try to get some info from alsa device file directly, as it tries with /dev/video. But I never >>>> tried this way, so I can be totally wrong!
-------------------------------
Instead of 50i (pal interlaced fields), I try 50 fps (progressive) that at least is a pal frequence.
And yes, it seems from the output that ffmpeg uses mpeg1video as default output codec.
Furter I try to combine the current line
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -t 20 -i /dev/video2 out-720x576_ms2130.mpeg
with and utilize the syntax developed 2021 for "Blu-ray compliant MPEG-2 SD video with LPCM audio"
ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -c:a pcm_s16be -f vob dv28.mpg
and for the current ongoing "DVD compliant MPEG-2 Video and PCM Audio"
ffmpeg -hide_banner -i dv01.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -flags +ilme+ildct dv01.mpg
to first
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 -i /dev/video2 720x576_50p_ms2130.mpg Option b:v (video bitrate (please use -b:v)) cannot be applied to input url /dev/video2 -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to. Error parsing options for input file /dev/video2. Error opening input files: Invalid argument
and next revised with no output. That is I need help to debug the syntax error:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 0.000000, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55db77114f00] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf59.27.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc59.37.100 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
well, I think framerate still 25 for 50i stream ....
can you re-check last line with framerate parameter removed or changed back to 25?
Ok, as this old post by my mistake already has been forwarded to the list and replied, I will follow it up later today, but need to rig rig up my camcorder and devices
Finally ready, I had to recall a lot since 2023.
ls /dev/video* /dev/video0 /dev/video1 /dev/video2 /dev/video3
for i in /dev/video*; do echo "$i"; udevadm info --query=all --attribute-walk --name=$i | grep -E "name"; done /dev/video0 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video1 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video2 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam" /dev/video3 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam"
v4l2-ctl --list-devices USB 2.0 Camera: HD 720P Webcam (usb-0000:00:14.0-11.2): /dev/video2 /dev/video3 /dev/media1
USB3.0 UHD: USB3.0 UHD (usb-0000:00:14.0-3): /dev/video0 /dev/video1 /dev/media0
As seen the HDMI-USB3 capture card + the S-Video/HDMI converter (with the analog S-video camcorder) is now on /dev/video0 while the USB2 webcam is on /dev/video2
but what is on video1 ? it seems that whole thing fail at Dequeued v4l2 buffer contains corrupted data (0 bytes). Does anything else (guvcview, vlc ..) process video stream this usb3 UHD device? mplayer tv:// -demuxer tv ?
ffplay can playback the S-video camcorder's imaging stream
Default without framerate specified:
ffplay -hide_banner -f video4linux2 /dev/video0 [video4linux2,v4l2 @ 0x7fe3c0000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 0.000000, bitrate: 398131 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 398131 kb/s, 60 fps, 60 tbr, 1000k tbn [video4linux2,v4l2 @ 0x7fe3c0000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times ^Cterje@localhost:~> d= 2 aq= 0KB vq= 0KB sq= 0B
With 25 fps specified:
ffplay -hide_banner -f video4linux2 -framerate 25 /dev/video0 [video4linux2,v4l2 @ 0x7f7fa8000c80] The driver changed the time per frame from 1/25 to 1/30 [video4linux2,v4l2 @ 0x7f7fa8000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 0.000000, bitrate: 199065 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 199065 kb/s, 30 fps, 30 tbr, 1000k tbn [video4linux2,v4l2 @ 0x7f7fa8000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times ^Cterje@localhost:~> d= 0 aq= 0KB vq= 0KB sq= 0B
With 30 fps specified:
ffplay -hide_banner -f video4linux2 -framerate 30 /dev/video0 [video4linux2,v4l2 @ 0x7f3878000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 0.000000, bitrate: 199065 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 199065 kb/s, 30 fps, 30 tbr, 1000k tbn [video4linux2,v4l2 @ 0x7f3878000c80] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times
-----------------
But empty output file with ffmpeg:
With 25 fps specified
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -i /dev/video0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_25fps_ms2130.mpg [video4linux2,v4l2 @ 0x560fe5926740] The driver changed the time per frame from 1/25 to 1/30 [video4linux2,v4l2 @ 0x560fe5926740] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 0.000000, bitrate: 199065 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 199065 kb/s, 30 fps, 30 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x560fe5926740] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x560fe5927140] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_25fps_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 30 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A [out#0/vob @ 0x560fe5928d00] video:0KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: unknown [out#0/vob @ 0x560fe5928d00] Output file is empty, nothing was encoded(check -ss / -t / -frames parameters if used) frame= 0 fps=0.0 q=0.0 Lsize= 0KiB time=N/A bitrate=N/A speed=N/A
Without framerate specified:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -i /dev/video0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_ms2130.mpg [video4linux2,v4l2 @ 0x55e707fd8740] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 0.000000, bitrate: 398131 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 398131 kb/s, 60 fps, 60 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55e707fd8740] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55e707fd9140] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 60 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A [out#0/vob @ 0x55e707fdacc0] video:0KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: unknown [out#0/vob @ 0x55e707fdacc0] Output file is empty, nothing was encoded(check -ss / -t / -frames parameters if used) frame= 0 fps=0.0 q=0.0 Lsize= 0KiB time=N/A bitrate=N/A speed=N/A
--------------
On the other hand, capturing with the USB webcam creates output file
Here with 50 fps specified
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x56418fd52740] The V4L2 driver changed the video from 720x576 to 800x600 [video4linux2,v4l2 @ 0x56418fd52740] The driver changed the time per frame from 1/50 to 1/20 Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 1969.283514, bitrate: 153600 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 800x600, 153600 kb/s, 20 fps, 20 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [mpeg2video @ 0x56418fd53200] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 800x600, q=2-31, 8000 kb/s, 20 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A [out#0/vob @ 0x56418fd54e00] video:13281KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 1.230734% frame= 284 fps= 22 q=2.0 Lsize= 13444KiB time=00:00:14.15 bitrate=7783.3kbits/s dup=97 drop=0 speed=1.08x Exiting normally, received signal 2.
ffprobe -hide_banner 720x576_50p_ms2130.mpg Input #0, mpeg, from '720x576_50p_ms2130.mpg': Duration: 00:00:14.20, start: 0.550000, bitrate: 7755 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 800x600 [SAR 1:1 DAR 4:3], 20 fps, 20 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 vbv_delay: N/A
Den 04.05.2025 05:49, skrev Andrew Randrianasulu:
вс, 4 мая 2025 г., 01:37 Terje J. Hanssen <[email protected]>:
Den 03.05.2025 13:00, skrev Terje J. Hanssen:
Den 02.05.2025 21:42, skrev Andrew Randrianasulu:
пт, 2 мая 2025 г., 22:37 Terje J. Hanssen <[email protected]>:
https://www.mail-archive.com/[email protected]/msg05748.html
I contine this new thread with an short extract from the long growing [Cin] ms2130 HDMI-USB3 UHD capture card - not quite as expected?
But shouldn't a 422 and not a 420 output format be created?
>> it seems in some cases ffmpeg not geared towards preserving most information, just picks up most commonly defined/first pixel format. >> Try mpeg2video as output codec, and/or specify pixel format (pix_fmt) more explicitly before output's filename?
>>> Could you possibly examplify the latter?
>>>> I think I just theorized ffmpeg may try to get some info from alsa device file directly, as it tries with /dev/video. But I never >>>> tried this way, so I can be totally wrong!
-------------------------------
Instead of 50i (pal interlaced fields), I try 50 fps (progressive) that at least is a pal frequence.
And yes, it seems from the output that ffmpeg uses mpeg1video as default output codec.
Furter I try to combine the current line
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -t 20 -i /dev/video2 out-720x576_ms2130.mpeg
with and utilize the syntax developed 2021 for "Blu-ray compliant MPEG-2 SD video with LPCM audio"
ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -c:a pcm_s16be -f vob dv28.mpg
and for the current ongoing "DVD compliant MPEG-2 Video and PCM Audio"
ffmpeg -hide_banner -i dv01.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -flags +ilme+ildct dv01.mpg
to first
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 -i /dev/video2 720x576_50p_ms2130.mpg Option b:v (video bitrate (please use -b:v)) cannot be applied to input url /dev/video2 -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to. Error parsing options for input file /dev/video2. Error opening input files: Invalid argument
and next revised with no output. That is I need help to debug the syntax error:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 0.000000, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55db77114f00] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf59.27.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc59.37.100 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
well, I think framerate still 25 for 50i stream ....
can you re-check last line with framerate parameter removed or changed back to 25?
Ok, as this old post by my mistake already has been forwarded to the list and replied, I will follow it up later today, but need to rig rig up my camcorder and devices
Finally ready, I had to recall a lot since 2023.
ls /dev/video* /dev/video0 /dev/video1 /dev/video2 /dev/video3
for i in /dev/video*; do echo "$i"; udevadm info --query=all --attribute-walk --name=$i | grep -E "name"; done /dev/video0 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video1 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video2 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam" /dev/video3 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam"
v4l2-ctl --list-devices USB 2.0 Camera: HD 720P Webcam (usb-0000:00:14.0-11.2): /dev/video2 /dev/video3 /dev/media1
USB3.0 UHD: USB3.0 UHD (usb-0000:00:14.0-3): /dev/video0 /dev/video1 /dev/media0
As seen the HDMI-USB3 capture card + the S-Video/HDMI converter (with the analog S-video camcorder) is now on /dev/video0 while the USB2 webcam is on /dev/video2
but what is on video1 ?
Nothing as far as I can see(?). It seems both camera devices allocate or are associated with three devices each.
it seems that whole thing fail at
Dequeued v4l2 buffer contains corrupted data (0 bytes).
I seems to happend when and after using unsupported fps
Does anything else (guvcview, vlc ..) process video stream this usb3 UHD device?
mplayer tv:// -demuxer tv ?
Not that I use, but have not haven't found a way to verify it. However, I have recalled and found out more with progress. The most important it seems required to reboot the machine with the camcorder ON (video signal) on beforehand, before ffmpeg get the video input. Reboot also seems required to clean up v4L2 buffer after using unsupported fps ffplay or ffmpeg cause the "Dequeued v4l2 buffer contains corrupted data (0 bytes)." Hopefully there are a v4L command to easier cleanup the latter? Beside the already listed Video4Linux devices, there are also cat /proc/asound/cards 0 [PCH_1 ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0x4200910000 irq 168 1 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0x41300000 irq 169 2 [UHD ]: USB-Audio - USB3.0 UHD MACROSILICON USB3.0 UHD at usb-0000:00:14.0-3, super speed 3 [Camera ]: USB-Audio - USB 2.0 Camera Sonix Technology Co., Ltd. USB 2.0 Camera at usb-0000:00:14.0-11.2, high speed However, so far ffmpeg has yet to find any audio streams via v4l2 as seen below. S-vido as well as audio L/R cables are connected between the camcorder out and A/D converter IN. Maybe additional configuration is required (I didn't think the separate sound card (Behringer U-Phono should be necessary) ---------- To list the v4l2 device capabilities; v4l2-ctl -d /dev/video0 --list-formats-ext ioctl: VIDIOC_ENUM_FMT Type: Video Capture [0]: 'YUYV' (YUYV 4:2:2) Size: Discrete 1920x1080 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1600x1200 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1360x768 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x1024 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x960 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x720 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1024x768 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 800x600 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 720x576 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 720x480 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 640x480 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) That is supported 10-20-30-50-60 fps for all sizes, not 25 fps! ------------- Try the same test for /dev/video1 v4l2-ctl -d /dev/video1 --list-formats-ext ioctl: VIDIOC_ENUM_FMT =========== ffmpeg listed available formats (supported pixel formats, video formats, and frame sizes) for a particular input device: ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video0 [video4linux2,v4l2 @ 0x55a384b214c0] Raw : yuyv422 : YUYV 4:2:2 : 1920x1080 1600x1200 1360x768 1280x1024 1280x960 1280x720 1024x768 800x600 720x576 720x480 640x480 [in#0 @ 0x55a384b21200] Error opening input: Immediate exit requested Error opening input file /dev/video0. And similar test for /dev/video1 ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video1 [video4linux2,v4l2 @ 0x557e1a5164c0] ioctl(VIDIOC_G_INPUT): Inappropriate ioctl for device [in#0 @ 0x557e1a516200] Error opening input: Inappropriate ioctl for device Error opening input file /dev/video1. Error opening input files: Inappropriate ioctl for device =============== With supported 50 fps specified, ffplay playback looks ok visually: ffplay -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 /dev/video0 Input #0, video4linux2,v4l2, from '/dev/video0':B sq= 0B Duration: N/A, start: 311.577886, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn ^Cterje@localhost:/Videoklipp/HDMI-USB3_Capture> sq= 0B =============== Capture DVD compatible MPG video (no audio found) with supported 50 fps progressive video. No Audio stream!? ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50fps_ms2130.mpg Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 323.195348, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [mpeg2video @ 0x55e390580200] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50fps_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A [out#0/vob @ 0x55e390581e00] video:18921KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 1.242550% frame= 1000 fps= 50 q=2.5 Lsize= 19156KiB time=00:00:19.98 bitrate=7854.2kbits/s speed=0.998x Stopped automatic ! Why? ---------------- du -sh * 19M 720x576_50fps_ms2130.mpg ffprobe -hide_banner 720x576_50fps_ms2130.mpg Input #0, mpeg, from '720x576_50fps_ms2130.mpg': Duration: 00:00:20.00, start: 0.520000, bitrate: 7846 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576 [SAR 1:1 DAR 5:4], 50 fps, 50 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 vbv_delay: N/A The video file playback looks ok with correct SD aspect ratio using ffplay and VLC, though "1080P" is printer near the top-right corner. ============================
вс, 4 мая 2025 г., 16:31 Terje J. Hanssen <[email protected]>:
Den 04.05.2025 05:49, skrev Andrew Randrianasulu:
вс, 4 мая 2025 г., 01:37 Terje J. Hanssen <[email protected]>:
Den 03.05.2025 13:00, skrev Terje J. Hanssen:
Den 02.05.2025 21:42, skrev Andrew Randrianasulu:
пт, 2 мая 2025 г., 22:37 Terje J. Hanssen <[email protected]>:
https://www.mail-archive.com/[email protected]/msg05748.html
I contine this new thread with an short extract from the long growing [Cin] ms2130 HDMI-USB3 UHD capture card - not quite as expected?
But shouldn't a 422 and not a 420 output format be created?
it seems in some cases ffmpeg not geared towards preserving most information, just picks up most commonly defined/first pixel format. Try mpeg2video as output codec, and/or specify pixel format (pix_fmt) more explicitly before output's filename?
Could you possibly examplify the latter?
> I think I just theorized ffmpeg may try to get some info from alsa device file directly, as it tries with /dev/video. But I never >>>> tried this way, so I can be totally wrong!
-------------------------------
Instead of 50i (pal interlaced fields), I try 50 fps (progressive) that at least is a pal frequence.
And yes, it seems from the output that ffmpeg uses mpeg1video as default output codec.
Furter I try to combine the current line
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -t 20 -i /dev/video2 out-720x576_ms2130.mpeg
with and utilize the syntax developed 2021 for "Blu-ray compliant MPEG-2 SD video with LPCM audio"
ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -c:a pcm_s16be -f vob dv28.mpg
and for the current ongoing "DVD compliant MPEG-2 Video and PCM Audio"
ffmpeg -hide_banner -i dv01.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -flags +ilme+ildct dv01.mpg
to first
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 -i /dev/video2 720x576_50p_ms2130.mpg Option b:v (video bitrate (please use -b:v)) cannot be applied to input url /dev/video2 -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to. Error parsing options for input file /dev/video2. Error opening input files: Invalid argument
and next revised with no output. That is I need help to debug the syntax error:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 0.000000, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55db77114f00] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf59.27.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc59.37.100 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
well, I think framerate still 25 for 50i stream ....
can you re-check last line with framerate parameter removed or changed back to 25?
Ok, as this old post by my mistake already has been forwarded to the list and replied, I will follow it up later today, but need to rig rig up my camcorder and devices
Finally ready, I had to recall a lot since 2023.
ls /dev/video* /dev/video0 /dev/video1 /dev/video2 /dev/video3
for i in /dev/video*; do echo "$i"; udevadm info --query=all --attribute-walk --name=$i | grep -E "name"; done /dev/video0 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video1 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video2 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam" /dev/video3 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam"
v4l2-ctl --list-devices USB 2.0 Camera: HD 720P Webcam (usb-0000:00:14.0-11.2): /dev/video2 /dev/video3 /dev/media1
USB3.0 UHD: USB3.0 UHD (usb-0000:00:14.0-3): /dev/video0 /dev/video1 /dev/media0
As seen the HDMI-USB3 capture card + the S-Video/HDMI converter (with the analog S-video camcorder) is now on /dev/video0 while the USB2 webcam is on /dev/video2
but what is on video1 ?
Nothing as far as I can see(?). It seems both camera devices allocate or are associated with three devices each.
it seems that whole thing fail at
Dequeued v4l2 buffer contains corrupted data (0 bytes).
I seems to happend when and after using unsupported fps
Does anything else (guvcview, vlc ..) process video stream this usb3 UHD device?
mplayer tv:// -demuxer tv ?
Not that I use, but have not haven't found a way to verify it.
However, I have recalled and found out more with progress.
The most important it seems required to reboot the machine with the camcorder ON (video signal) on beforehand, before ffmpeg get the video input.
Reboot also seems required to clean up v4L2 buffer after using unsupported fps ffplay or ffmpeg cause the "Dequeued v4l2 buffer contains corrupted data (0 bytes)." Hopefully there are a v4L command to easier cleanup the latter?
Does unpluggin and repluggin it helps without reboot? Otherwise you probably want to talk to v4l2 maintainers or knowledgable people at suse forums ...
Beside the already listed Video4Linux devices, there are also
cat /proc/asound/cards
0 [PCH_1 ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0x4200910000 irq 168 1 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0x41300000 irq 169 2 [UHD ]: USB-Audio - USB3.0 UHD MACROSILICON USB3.0 UHD at usb-0000:00:14.0-3, super speed 3 [Camera ]: USB-Audio - USB 2.0 Camera Sonix Technology Co., Ltd. USB 2.0 Camera at usb-0000:00:14.0-11.2, high speed
However, so far ffmpeg has yet to find any audio streams via v4l2 as seen below.
may be you need another -i so you can point ffmpeg at alsa or pulseaudio audio capture device? yes, this line grows bigger by the day ... ) S-vido as well as audio L/R cables are connected between the camcorder out
and A/D converter IN. Maybe additional configuration is required (I didn't think the separate sound card (Behringer U-Phono should be necessary) ----------
To list the v4l2 device capabilities;
v4l2-ctl -d /dev/video0 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT Type: Video Capture
[0]: 'YUYV' (YUYV 4:2:2) Size: Discrete 1920x1080 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1600x1200 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1360x768 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x1024 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x960 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x720 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1024x768 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 800x600 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 720x576 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 720x480 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 640x480 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps)
That is supported 10-20-30-50-60 fps for all sizes, not 25 fps!
so it looks like it does some frame/field interpolation (for s-video input) without letting user correct/disable this? Does this device come with manual of any sort? Any Windows utility perhaps? -------------
Try the same test for /dev/video1
v4l2-ctl -d /dev/video1 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
===========
ffmpeg listed available formats (supported pixel formats, video formats, and frame sizes) for a particular input device:
ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video0
[video4linux2,v4l2 @ 0x55a384b214c0] Raw : yuyv422 : YUYV 4:2:2 : 1920x1080 1600x1200 1360x768 1280x1024 1280x960 1280x720 1024x768 800x600 720x576 720x480 640x480 [in#0 @ 0x55a384b21200] Error opening input: Immediate exit requested Error opening input file /dev/video0.
And similar test for /dev/video1
ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video1
[video4linux2,v4l2 @ 0x557e1a5164c0] ioctl(VIDIOC_G_INPUT): Inappropriate ioctl for device [in#0 @ 0x557e1a516200] Error opening input: Inappropriate ioctl for device Error opening input file /dev/video1. Error opening input files: Inappropriate ioctl for device
===============
With supported 50 fps specified, ffplay playback looks ok visually:
ffplay -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 /dev/video0
Input #0, video4linux2,v4l2, from '/dev/video0':B sq= 0B Duration: N/A, start: 311.577886, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn ^Cterje@localhost:/Videoklipp/HDMI-USB3_Capture> sq= 0B
===============
Capture DVD compatible MPG video (no audio found) with supported 50 fps progressive video. No Audio stream!?
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50fps_ms2130.mpg
Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 323.195348, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [mpeg2video @ 0x55e390580200] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50fps_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A [out#0/vob @ 0x55e390581e00] video:18921KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 1.242550% frame= 1000 fps= 50 q=2.5 Lsize= 19156KiB time=00:00:19.98 bitrate=7854.2kbits/s speed=0.998x
Stopped automatic ! Why?
may be usb cable just moved a bit?
----------------
du -sh *
19M 720x576_50fps_ms2130.mpg
ffprobe -hide_banner 720x576_50fps_ms2130.mpg
Input #0, mpeg, from '720x576_50fps_ms2130.mpg': Duration: 00:00:20.00, start: 0.520000, bitrate: 7846 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576 [SAR 1:1 DAR 5:4], 50 fps, 50 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 vbv_delay: N/A
The video file playback looks ok with correct SD aspect ratio using ffplay and VLC, though "1080P" is printer near the top-right corner.
hm ...... I hope this "overlay" can be disabled?
============================
Den 04.05.2025 15:42, skrev Andrew Randrianasulu:
вс, 4 мая 2025 г., 16:31 Terje J. Hanssen <[email protected]>:
Den 04.05.2025 05:49, skrev Andrew Randrianasulu:
вс, 4 мая 2025 г., 01:37 Terje J. Hanssen <[email protected]>:
Den 03.05.2025 13:00, skrev Terje J. Hanssen:
Den 02.05.2025 21:42, skrev Andrew Randrianasulu:
пт, 2 мая 2025 г., 22:37 Terje J. Hanssen <[email protected]>:
https://www.mail-archive.com/[email protected]/msg05748.html
I contine this new thread with an short extract from the long growing [Cin] ms2130 HDMI-USB3 UHD capture card - not quite as expected?
But shouldn't a 422 and not a 420 output format be created?
>> it seems in some cases ffmpeg not geared towards preserving most information, just picks up most commonly defined/first pixel format. >> Try mpeg2video as output codec, and/or specify pixel format (pix_fmt) more explicitly before output's filename?
>>> Could you possibly examplify the latter?
>>>> I think I just theorized ffmpeg may try to get some info from alsa device file directly, as it tries with /dev/video. But I never >>>> tried this way, so I can be totally wrong!
-------------------------------
Instead of 50i (pal interlaced fields), I try 50 fps (progressive) that at least is a pal frequence.
And yes, it seems from the output that ffmpeg uses mpeg1video as default output codec.
Furter I try to combine the current line
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -t 20 -i /dev/video2 out-720x576_ms2130.mpeg
with and utilize the syntax developed 2021 for "Blu-ray compliant MPEG-2 SD video with LPCM audio"
ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -c:a pcm_s16be -f vob dv28.mpg
and for the current ongoing "DVD compliant MPEG-2 Video and PCM Audio"
ffmpeg -hide_banner -i dv01.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -flags +ilme+ildct dv01.mpg
to first
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 -i /dev/video2 720x576_50p_ms2130.mpg Option b:v (video bitrate (please use -b:v)) cannot be applied to input url /dev/video2 -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to. Error parsing options for input file /dev/video2. Error opening input files: Invalid argument
and next revised with no output. That is I need help to debug the syntax error:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 0.000000, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55db77114f00] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf59.27.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc59.37.100 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
well, I think framerate still 25 for 50i stream ....
can you re-check last line with framerate parameter removed or changed back to 25?
Ok, as this old post by my mistake already has been forwarded to the list and replied, I will follow it up later today, but need to rig rig up my camcorder and devices
Finally ready, I had to recall a lot since 2023.
ls /dev/video* /dev/video0 /dev/video1 /dev/video2 /dev/video3
for i in /dev/video*; do echo "$i"; udevadm info --query=all --attribute-walk --name=$i | grep -E "name"; done /dev/video0 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video1 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video2 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam" /dev/video3 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam"
v4l2-ctl --list-devices USB 2.0 Camera: HD 720P Webcam (usb-0000:00:14.0-11.2): /dev/video2 /dev/video3 /dev/media1
USB3.0 UHD: USB3.0 UHD (usb-0000:00:14.0-3): /dev/video0 /dev/video1 /dev/media0
As seen the HDMI-USB3 capture card + the S-Video/HDMI converter (with the analog S-video camcorder) is now on /dev/video0 while the USB2 webcam is on /dev/video2
but what is on video1 ?
Nothing as far as I can see(?). It seems both camera devices allocate or are associated with three devices each.
it seems that whole thing fail at
Dequeued v4l2 buffer contains corrupted data (0 bytes).
I seems to happend when and after using unsupported fps
Does anything else (guvcview, vlc ..) process video stream this usb3 UHD device?
mplayer tv:// -demuxer tv ?
Not that I use, but have not haven't found a way to verify it.
However, I have recalled and found out more with progress.
The most important it seems required to reboot the machine with the camcorder ON (video signal) on beforehand, before ffmpeg get the video input.
Reboot also seems required to clean up v4L2 buffer after using unsupported fps ffplay or ffmpeg cause the "Dequeued v4l2 buffer contains corrupted data (0 bytes)." Hopefully there are a v4L command to easier cleanup the latter?
Does unpluggin and repluggin it helps without reboot?
It is easier and faster for me to reboot than to creep under the table and unplug from the WS backplane :) There is the only working USB3 port, while it tend to hang on the frontpanel. I read somewhere once that shared USB buses may have such problems on Linux.
Otherwise you probably want to talk to v4l2 maintainers or knowledgable people at suse forums ...
Beside the already listed Video4Linux devices, there are also
cat /proc/asound/cards
0 [PCH_1 ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0x4200910000 irq 168 1 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0x41300000 irq 169 2 [UHD ]: USB-Audio - USB3.0 UHD MACROSILICON USB3.0 UHD at usb-0000:00:14.0-3, super speed 3 [Camera ]: USB-Audio - USB 2.0 Camera Sonix Technology Co., Ltd. USB 2.0 Camera at usb-0000:00:14.0-11.2, high speed
However, so far ffmpeg has yet to find any audio streams via v4l2 as seen below.
may be you need another -i so you can point ffmpeg at alsa or pulseaudio audio capture device?
yes, this line grows bigger by the day ... )
Thank you for the tip and reminder regarding alsa input. I also found a FFmpeg wiki: Capture / V4L2_ALSA that helped me https://trac.ffmpeg.org/wiki/Capture/V4L2_ALSA arecord -L null Discard all samples (playback) or generate zero samples (capture) sysdefault Default Audio Device speexrate Rate Converter Plugin Using Speex Resampler pipewire PipeWire Sound Server upmix Plugin for channel upmix (4,6,8) default Default ALSA Output (currently PipeWire Media Server) sysdefault:CARD=UHD USB3.0 UHD, USB Audio Default Audio Device front:CARD=UHD,DEV=0 USB3.0 UHD, USB Audio Front output / input sysdefault:CARD=PCH_1 HDA Intel PCH, ALC897 Analog Default Audio Device front:CARD=PCH_1,DEV=0 HDA Intel PCH, ALC897 Analog Front output / input sysdefault:CARD=Camera USB 2.0 Camera, USB Audio Default Audio Device front:CARD=Camera,DEV=0 USB 2.0 Camera, USB Audio Front output / input I used -i hw:CARD=UHD,DEV=0 as working alsa input device for ffmpeg below ------------------------ Capture MPEG-2 File with 422 Video an PCM_DVD Audio Encoding cd /Videoklipp/HDMI-USB3_Capture Reboot camcorder to clean up v4l2 buffer first: ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video0 -f alsa -ac 2 -i hw:CARD=UHD,DEV=0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50fps+alsa_ms2130.mpg Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 247.290426, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn [aist#1:0/pcm_s16le @ 0x558f7224bf00] Guessed Channel Layout: stereo Input #1, alsa, from 'hw:CARD=UHD,DEV=0': Duration: N/A, start: 1746391255.237803, bitrate: 1536 kb/s Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Stream #1:0 -> #0:1 (pcm_s16le (native) -> pcm_dvd (native)) Press [q] to stop, [?] for help [mpeg2video @ 0x558f72233280] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50fps+alsa_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A Stream #0:1: Audio: pcm_dvd, 48000 Hz, stereo, s16, 1536 kb/s Metadata: encoder : Lavc61.19.101 pcm_dvd [out#0/vob @ 0x558f7224c200] video:18921KiB audio:3756KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 1.320964% frame= 1000 fps= 50 q=2.5 Lsize= 22976KiB time=00:00:19.98 bitrate=9420.4kbits/s speed=0.998x Stopped automatic with frame=1000 -------- du -sh * 23M 720x576_50fps+alsa_ms2130.mpg 19M 720x576_50fps_ms2130.mpg -------- ffprobe -hide_banner 720x576_50fps+alsa_ms2130.mpg Input #0, mpeg, from '720x576_50fps+alsa_ms2130.mpg': Duration: 00:00:20.01, start: 0.520000, bitrate: 9408 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576 [SAR 1:1 DAR 5:4], 50 fps, 50 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 vbv_delay: N/A Stream #0:1[0xa0]: Audio: pcm_dvd, 48000 Hz, stereo, s16, 1536 kb/s ======================================== -----------------------
S-vido as well as audio L/R cables are connected between the camcorder out and A/D converter IN. Maybe additional configuration is required (I didn't think the separate sound card (Behringer U-Phono should be necessary) ----------
To list the v4l2 device capabilities;
v4l2-ctl -d /dev/video0 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT Type: Video Capture
[0]: 'YUYV' (YUYV 4:2:2) Size: Discrete 1920x1080 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1600x1200 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1360x768 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x1024 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x960 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x720 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1024x768 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 800x600 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 720x576 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 720x480 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 640x480 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps)
That is supported 10-20-30-50-60 fps for all sizes, not 25 fps!
so it looks like it does some frame/field interpolation (for s-video input) without letting user correct/disable this?
I don't see real drawback it makes progressive 50p PAL video output.
Does this device come with manual of any sort? Any Windows utility perhaps?
This is the ms2130 HDMI-USB3 dongle we also discussed in older threads: https://www.aliexpress.com/item/1005004883158574.html https://www.cnx-software.com/2022/11/07/ms2130-based-4k-hdmi-to-usb-3-0-vide... https://www.mail-archive.com/[email protected]/msg05587.html The AV S-Video to HDMI converter is this one https://www.ebay.com.au/itm/356431236663?_trkparms=amclksrc%3DITM%26aid%3D11...
-------------
Try the same test for /dev/video1
v4l2-ctl -d /dev/video1 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
===========
ffmpeg listed available formats (supported pixel formats, video formats, and frame sizes) for a particular input device:
ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video0
[video4linux2,v4l2 @ 0x55a384b214c0] Raw : yuyv422 : YUYV 4:2:2 : 1920x1080 1600x1200 1360x768 1280x1024 1280x960 1280x720 1024x768 800x600 720x576 720x480 640x480 [in#0 @ 0x55a384b21200] Error opening input: Immediate exit requested Error opening input file /dev/video0.
And similar test for /dev/video1
ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video1
[video4linux2,v4l2 @ 0x557e1a5164c0] ioctl(VIDIOC_G_INPUT): Inappropriate ioctl for device [in#0 @ 0x557e1a516200] Error opening input: Inappropriate ioctl for device Error opening input file /dev/video1. Error opening input files: Inappropriate ioctl for device
===============
With supported 50 fps specified, ffplay playback looks ok visually:
ffplay -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 /dev/video0
Input #0, video4linux2,v4l2, from '/dev/video0':B sq= 0B Duration: N/A, start: 311.577886, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn ^Cterje@localhost:/Videoklipp/HDMI-USB3_Capture> sq= 0B
===============
Capture DVD compatible MPG video (no audio found) with supported 50 fps progressive video. No Audio stream!?
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50fps_ms2130.mpg
Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 323.195348, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [mpeg2video @ 0x55e390580200] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50fps_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A [out#0/vob @ 0x55e390581e00] video:18921KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 1.242550% frame= 1000 fps= 50 q=2.5 Lsize= 19156KiB time=00:00:19.98 bitrate=7854.2kbits/s speed=0.998x
Stopped automatic ! Why?
may be usb cable just moved a bit?
No, next test also stopped at frame=1000 Maybe this is some security default for "still" camcorder (Sony TR2000) on a desk mount where the image is not changed or moved. I have not tested playback of real S-video tape recordings.
----------------
du -sh *
19M 720x576_50fps_ms2130.mpg
ffprobe -hide_banner 720x576_50fps_ms2130.mpg
Input #0, mpeg, from '720x576_50fps_ms2130.mpg': Duration: 00:00:20.00, start: 0.520000, bitrate: 7846 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576 [SAR 1:1 DAR 5:4], 50 fps, 50 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 vbv_delay: N/A
The video file playback looks ok with correct SD aspect ratio using ffplay and VLC, though "1080P" is printer near the top-right corner.
hm ...... I hope this "overlay" can be disabled?
============================
пн, 5 мая 2025 г., 01:02 Terje J. Hanssen <[email protected]>:
Den 04.05.2025 15:42, skrev Andrew Randrianasulu:
вс, 4 мая 2025 г., 16:31 Terje J. Hanssen <[email protected]>:
Den 04.05.2025 05:49, skrev Andrew Randrianasulu:
вс, 4 мая 2025 г., 01:37 Terje J. Hanssen <[email protected]>:
Den 03.05.2025 13:00, skrev Terje J. Hanssen:
Den 02.05.2025 21:42, skrev Andrew Randrianasulu:
пт, 2 мая 2025 г., 22:37 Terje J. Hanssen <[email protected]>:
https://www.mail-archive.com/[email protected]/msg05748.html
I contine this new thread with an short extract from the long growing [Cin] ms2130 HDMI-USB3 UHD capture card - not quite as expected?
But shouldn't a 422 and not a 420 output format be created?
it seems in some cases ffmpeg not geared towards preserving most information, just picks up most commonly defined/first pixel format.
Try mpeg2video as output codec, and/or specify pixel format (pix_fmt) more explicitly before output's filename?
> Could you possibly examplify the latter?
>> I think I just theorized ffmpeg may try to get some info from alsa device file directly, as it tries with /dev/video. But I never >>>> tried this way, so I can be totally wrong!
-------------------------------
Instead of 50i (pal interlaced fields), I try 50 fps (progressive) that at least is a pal frequence.
And yes, it seems from the output that ffmpeg uses mpeg1video as default output codec.
Furter I try to combine the current line
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -t 20 -i /dev/video2 out-720x576_ms2130.mpeg
with and utilize the syntax developed 2021 for "Blu-ray compliant MPEG-2 SD video with LPCM audio"
ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -c:a pcm_s16be -f vob dv28.mpg
and for the current ongoing "DVD compliant MPEG-2 Video and PCM Audio"
ffmpeg -hide_banner -i dv01.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -flags +ilme+ildct dv01.mpg
to first
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 -i /dev/video2 720x576_50p_ms2130.mpg Option b:v (video bitrate (please use -b:v)) cannot be applied to input url /dev/video2 -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to. Error parsing options for input file /dev/video2. Error opening input files: Invalid argument
and next revised with no output. That is I need help to debug the syntax error:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 0.000000, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55db77114f00] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf59.27.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc59.37.100 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
well, I think framerate still 25 for 50i stream ....
can you re-check last line with framerate parameter removed or changed back to 25?
Ok, as this old post by my mistake already has been forwarded to the list and replied, I will follow it up later today, but need to rig rig up my camcorder and devices
Finally ready, I had to recall a lot since 2023.
ls /dev/video* /dev/video0 /dev/video1 /dev/video2 /dev/video3
for i in /dev/video*; do echo "$i"; udevadm info --query=all --attribute-walk --name=$i | grep -E "name"; done /dev/video0 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video1 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video2 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam" /dev/video3 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam"
v4l2-ctl --list-devices USB 2.0 Camera: HD 720P Webcam (usb-0000:00:14.0-11.2): /dev/video2 /dev/video3 /dev/media1
USB3.0 UHD: USB3.0 UHD (usb-0000:00:14.0-3): /dev/video0 /dev/video1 /dev/media0
As seen the HDMI-USB3 capture card + the S-Video/HDMI converter (with the analog S-video camcorder) is now on /dev/video0 while the USB2 webcam is on /dev/video2
but what is on video1 ?
Nothing as far as I can see(?). It seems both camera devices allocate or are associated with three devices each.
it seems that whole thing fail at
Dequeued v4l2 buffer contains corrupted data (0 bytes).
I seems to happend when and after using unsupported fps
Does anything else (guvcview, vlc ..) process video stream this usb3 UHD device?
mplayer tv:// -demuxer tv ?
Not that I use, but have not haven't found a way to verify it.
However, I have recalled and found out more with progress.
The most important it seems required to reboot the machine with the camcorder ON (video signal) on beforehand, before ffmpeg get the video input.
Reboot also seems required to clean up v4L2 buffer after using unsupported fps ffplay or ffmpeg cause the "Dequeued v4l2 buffer contains corrupted data (0 bytes)." Hopefully there are a v4L command to easier cleanup the latter?
Does unpluggin and repluggin it helps without reboot?
It is easier and faster for me to reboot than to creep under the table and unplug from the WS backplane :) There is the only working USB3 port, while it tend to hang on the frontpanel. I read somewhere once that shared USB buses may have such problems on Linux.
Otherwise you probably want to talk to v4l2 maintainers or knowledgable people at suse forums ...
Beside the already listed Video4Linux devices, there are also
cat /proc/asound/cards
0 [PCH_1 ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0x4200910000 irq 168 1 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0x41300000 irq 169 2 [UHD ]: USB-Audio - USB3.0 UHD MACROSILICON USB3.0 UHD at usb-0000:00:14.0-3, super speed 3 [Camera ]: USB-Audio - USB 2.0 Camera Sonix Technology Co., Ltd. USB 2.0 Camera at usb-0000:00:14.0-11.2, high speed
However, so far ffmpeg has yet to find any audio streams via v4l2 as seen below.
may be you need another -i so you can point ffmpeg at alsa or pulseaudio audio capture device?
yes, this line grows bigger by the day ... )
Thank you for the tip and reminder regarding alsa input. I also found a FFmpeg wiki: Capture / V4L2_ALSA that helped me https://trac.ffmpeg.org/wiki/Capture/V4L2_ALSA
arecord -L
null Discard all samples (playback) or generate zero samples (capture) sysdefault Default Audio Device speexrate Rate Converter Plugin Using Speex Resampler pipewire PipeWire Sound Server upmix Plugin for channel upmix (4,6,8) default Default ALSA Output (currently PipeWire Media Server) sysdefault:CARD=UHD USB3.0 UHD, USB Audio Default Audio Device front:CARD=UHD,DEV=0 USB3.0 UHD, USB Audio Front output / input sysdefault:CARD=PCH_1 HDA Intel PCH, ALC897 Analog Default Audio Device front:CARD=PCH_1,DEV=0 HDA Intel PCH, ALC897 Analog Front output / input sysdefault:CARD=Camera USB 2.0 Camera, USB Audio Default Audio Device front:CARD=Camera,DEV=0 USB 2.0 Camera, USB Audio Front output / input
I used -i hw:CARD=UHD,DEV=0 as working alsa input device for ffmpeg below ------------------------
Capture MPEG-2 File with 422 Video an PCM_DVD Audio Encoding
cd /Videoklipp/HDMI-USB3_Capture
Reboot camcorder to clean up v4l2 buffer first:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video0 -f alsa -ac 2 -i hw:CARD=UHD,DEV=0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50fps+alsa_ms2130.mpg
Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 247.290426, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn [aist#1:0/pcm_s16le @ 0x558f7224bf00] Guessed Channel Layout: stereo Input #1, alsa, from 'hw:CARD=UHD,DEV=0': Duration: N/A, start: 1746391255.237803, bitrate: 1536 kb/s Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Stream #1:0 -> #0:1 (pcm_s16le (native) -> pcm_dvd (native)) Press [q] to stop, [?] for help [mpeg2video @ 0x558f72233280] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50fps+alsa_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A Stream #0:1: Audio: pcm_dvd, 48000 Hz, stereo, s16, 1536 kb/s Metadata: encoder : Lavc61.19.101 pcm_dvd [out#0/vob @ 0x558f7224c200] video:18921KiB audio:3756KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 1.320964% frame= 1000 fps= 50 q=2.5 Lsize= 22976KiB time=00:00:19.98 bitrate=9420.4kbits/s speed=0.998x
Stopped automatic with frame=1000 --------
du -sh * 23M 720x576_50fps+alsa_ms2130.mpg 19M 720x576_50fps_ms2130.mpg --------
ffprobe -hide_banner 720x576_50fps+alsa_ms2130.mpg
Input #0, mpeg, from '720x576_50fps+alsa_ms2130.mpg': Duration: 00:00:20.01, start: 0.520000, bitrate: 9408 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576 [SAR 1:1 DAR 5:4], 50 fps, 50 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 vbv_delay: N/A Stream #0:1[0xa0]: Audio: pcm_dvd, 48000 Hz, stereo, s16, 1536 kb/s
========================================
-----------------------
S-vido as well as audio L/R cables are connected between the camcorder out
and A/D converter IN. Maybe additional configuration is required (I didn't think the separate sound card (Behringer U-Phono should be necessary) ----------
To list the v4l2 device capabilities;
v4l2-ctl -d /dev/video0 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT Type: Video Capture
[0]: 'YUYV' (YUYV 4:2:2) Size: Discrete 1920x1080 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1600x1200 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1360x768 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x1024 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x960 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x720 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1024x768 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 800x600 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 720x576 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 720x480 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 640x480 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps)
That is supported 10-20-30-50-60 fps for all sizes, not 25 fps!
so it looks like it does some frame/field interpolation (for s-video input) without letting user correct/disable this?
I don't see real drawback it makes progressive 50p PAL video output.
Does this device come with manual of any sort? Any Windows utility perhaps?
This is the ms2130 HDMI-USB3 dongle we also discussed in older threads: https://www.aliexpress.com/item/1005004883158574.html
https://www.cnx-software.com/2022/11/07/ms2130-based-4k-hdmi-to-usb-3-0-vide... https://www.mail-archive.com/[email protected]/msg05587.html
The AV S-Video to HDMI converter is this one
https://www.ebay.com.au/itm/356431236663?_trkparms=amclksrc%3DITM%26aid%3D11...
-------------
Try the same test for /dev/video1
v4l2-ctl -d /dev/video1 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
===========
ffmpeg listed available formats (supported pixel formats, video formats, and frame sizes) for a particular input device:
ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video0
[video4linux2,v4l2 @ 0x55a384b214c0] Raw : yuyv422 : YUYV 4:2:2 : 1920x1080 1600x1200 1360x768 1280x1024 1280x960 1280x720 1024x768 800x600 720x576 720x480 640x480 [in#0 @ 0x55a384b21200] Error opening input: Immediate exit requested Error opening input file /dev/video0.
And similar test for /dev/video1
ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video1
[video4linux2,v4l2 @ 0x557e1a5164c0] ioctl(VIDIOC_G_INPUT): Inappropriate ioctl for device [in#0 @ 0x557e1a516200] Error opening input: Inappropriate ioctl for device Error opening input file /dev/video1. Error opening input files: Inappropriate ioctl for device
===============
With supported 50 fps specified, ffplay playback looks ok visually:
ffplay -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 /dev/video0
Input #0, video4linux2,v4l2, from '/dev/video0':B sq= 0B Duration: N/A, start: 311.577886, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn ^Cterje@localhost:/Videoklipp/HDMI-USB3_Capture> sq= 0B
===============
Capture DVD compatible MPG video (no audio found) with supported 50 fps progressive video. No Audio stream!?
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50fps_ms2130.mpg
Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 323.195348, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [mpeg2video @ 0x55e390580200] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50fps_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A [out#0/vob @ 0x55e390581e00] video:18921KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 1.242550% frame= 1000 fps= 50 q=2.5 Lsize= 19156KiB time=00:00:19.98 bitrate=7854.2kbits/s speed=0.998x
Stopped automatic ! Why?
may be usb cable just moved a bit?
No, next test also stopped at frame=1000 Maybe this is some security default for "still" camcorder (Sony TR2000) on a desk mount where the image is not changed or moved. I have not tested playback of real S-video tape recordings.
try to remove "-t 20" part of ffmpeg command line? or change it to 60 (seconds) or something suitable for longer tests ... at least AV to hdmi box should come with manual ;) hopefully there is copy somewhere online ... Sorry, I missed initially that you use TWO devices to get s-video into your workstation. Yes, it was in email subject line. Happy capturing!
----------------
du -sh *
19M 720x576_50fps_ms2130.mpg
ffprobe -hide_banner 720x576_50fps_ms2130.mpg
Input #0, mpeg, from '720x576_50fps_ms2130.mpg': Duration: 00:00:20.00, start: 0.520000, bitrate: 7846 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576 [SAR 1:1 DAR 5:4], 50 fps, 50 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 vbv_delay: N/A
The video file playback looks ok with correct SD aspect ratio using ffplay and VLC, though "1080P" is printer near the top-right corner.
hm ...... I hope this "overlay" can be disabled?
============================
Den 05.05.2025 00:12, skrev Andrew Randrianasulu:
пн, 5 мая 2025 г., 01:02 Terje J. Hanssen <[email protected]>:
Den 04.05.2025 15:42, skrev Andrew Randrianasulu:
вс, 4 мая 2025 г., 16:31 Terje J. Hanssen <[email protected]>:
Den 04.05.2025 05:49, skrev Andrew Randrianasulu:
вс, 4 мая 2025 г., 01:37 Terje J. Hanssen <[email protected]>:
Den 03.05.2025 13:00, skrev Terje J. Hanssen:
Den 02.05.2025 21:42, skrev Andrew Randrianasulu:
пт, 2 мая 2025 г., 22:37 Terje J. Hanssen <[email protected]>:
https://www.mail-archive.com/[email protected]/msg05748.html
I contine this new thread with an short extract from the long growing [Cin] ms2130 HDMI-USB3 UHD capture card - not quite as expected?
But shouldn't a 422 and not a 420 output format be created?
>> it seems in some cases ffmpeg not geared towards preserving most information, just picks up most commonly defined/first pixel format. >> Try mpeg2video as output codec, and/or specify pixel format (pix_fmt) more explicitly before output's filename?
>>> Could you possibly examplify the latter?
>>>> I think I just theorized ffmpeg may try to get some info from alsa device file directly, as it tries with /dev/video. But I never >>>> tried this way, so I can be totally wrong!
-------------------------------
Instead of 50i (pal interlaced fields), I try 50 fps (progressive) that at least is a pal frequence.
And yes, it seems from the output that ffmpeg uses mpeg1video as default output codec.
Furter I try to combine the current line
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 25 -t 20 -i /dev/video2 out-720x576_ms2130.mpeg
with and utilize the syntax developed 2021 for "Blu-ray compliant MPEG-2 SD video with LPCM audio"
ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -c:a pcm_s16be -f vob dv28.mpg
and for the current ongoing "DVD compliant MPEG-2 Video and PCM Audio"
ffmpeg -hide_banner -i dv01.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -flags +ilme+ildct dv01.mpg
to first
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 -i /dev/video2 720x576_50p_ms2130.mpg Option b:v (video bitrate (please use -b:v)) cannot be applied to input url /dev/video2 -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to. Error parsing options for input file /dev/video2. Error opening input files: Invalid argument
and next revised with no output. That is I need help to debug the syntax error:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50p_ms2130.mpg [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Input #0, video4linux2,v4l2, from '/dev/video2': Duration: N/A, start: 0.000000, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains corrupted data (0 bytes). Last message repeated 30 times [mpeg2video @ 0x55db77114f00] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50p_ms2130.mpg': Metadata: encoder : Lavf59.27.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc59.37.100 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
well, I think framerate still 25 for 50i stream ....
can you re-check last line with framerate parameter removed or changed back to 25?
Ok, as this old post by my mistake already has been forwarded to the list and replied, I will follow it up later today, but need to rig rig up my camcorder and devices
Finally ready, I had to recall a lot since 2023.
ls /dev/video* /dev/video0 /dev/video1 /dev/video2 /dev/video3
for i in /dev/video*; do echo "$i"; udevadm info --query=all --attribute-walk --name=$i | grep -E "name"; done /dev/video0 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video1 ATTR{name}=="USB3.0 UHD: USB3.0 UHD" /dev/video2 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam" /dev/video3 ATTR{name}=="USB 2.0 Camera: HD 720P Webcam"
v4l2-ctl --list-devices USB 2.0 Camera: HD 720P Webcam (usb-0000:00:14.0-11.2): /dev/video2 /dev/video3 /dev/media1
USB3.0 UHD: USB3.0 UHD (usb-0000:00:14.0-3): /dev/video0 /dev/video1 /dev/media0
As seen the HDMI-USB3 capture card + the S-Video/HDMI converter (with the analog S-video camcorder) is now on /dev/video0 while the USB2 webcam is on /dev/video2
but what is on video1 ?
Nothing as far as I can see(?). It seems both camera devices allocate or are associated with three devices each.
it seems that whole thing fail at
Dequeued v4l2 buffer contains corrupted data (0 bytes).
I seems to happend when and after using unsupported fps
Does anything else (guvcview, vlc ..) process video stream this usb3 UHD device?
mplayer tv:// -demuxer tv ?
Not that I use, but have not haven't found a way to verify it.
However, I have recalled and found out more with progress.
The most important it seems required to reboot the machine with the camcorder ON (video signal) on beforehand, before ffmpeg get the video input.
Reboot also seems required to clean up v4L2 buffer after using unsupported fps ffplay or ffmpeg cause the "Dequeued v4l2 buffer contains corrupted data (0 bytes)." Hopefully there are a v4L command to easier cleanup the latter?
Does unpluggin and repluggin it helps without reboot?
It is easier and faster for me to reboot than to creep under the table and unplug from the WS backplane :) There is the only working USB3 port, while it tend to hang on the frontpanel. I read somewhere once that shared USB buses may have such problems on Linux.
Otherwise you probably want to talk to v4l2 maintainers or knowledgable people at suse forums ...
Beside the already listed Video4Linux devices, there are also
cat /proc/asound/cards
0 [PCH_1 ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0x4200910000 irq 168 1 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0x41300000 irq 169 2 [UHD ]: USB-Audio - USB3.0 UHD MACROSILICON USB3.0 UHD at usb-0000:00:14.0-3, super speed 3 [Camera ]: USB-Audio - USB 2.0 Camera Sonix Technology Co., Ltd. USB 2.0 Camera at usb-0000:00:14.0-11.2, high speed
However, so far ffmpeg has yet to find any audio streams via v4l2 as seen below.
may be you need another -i so you can point ffmpeg at alsa or pulseaudio audio capture device?
yes, this line grows bigger by the day ... )
Thank you for the tip and reminder regarding alsa input. I also found a FFmpeg wiki: Capture / V4L2_ALSA that helped me https://trac.ffmpeg.org/wiki/Capture/V4L2_ALSA
arecord -L
null Discard all samples (playback) or generate zero samples (capture) sysdefault Default Audio Device speexrate Rate Converter Plugin Using Speex Resampler pipewire PipeWire Sound Server upmix Plugin for channel upmix (4,6,8) default Default ALSA Output (currently PipeWire Media Server) sysdefault:CARD=UHD USB3.0 UHD, USB Audio Default Audio Device front:CARD=UHD,DEV=0 USB3.0 UHD, USB Audio Front output / input sysdefault:CARD=PCH_1 HDA Intel PCH, ALC897 Analog Default Audio Device front:CARD=PCH_1,DEV=0 HDA Intel PCH, ALC897 Analog Front output / input sysdefault:CARD=Camera USB 2.0 Camera, USB Audio Default Audio Device front:CARD=Camera,DEV=0 USB 2.0 Camera, USB Audio Front output / input
I used -i hw:CARD=UHD,DEV=0 as working alsa input device for ffmpeg below ------------------------
Capture MPEG-2 File with 422 Video an PCM_DVD Audio Encoding
cd /Videoklipp/HDMI-USB3_Capture
Reboot camcorder to clean up v4l2 buffer first:
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video0 -f alsa -ac 2 -i hw:CARD=UHD,DEV=0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50fps+alsa_ms2130.mpg
Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 247.290426, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn [aist#1:0/pcm_s16le @ 0x558f7224bf00] Guessed Channel Layout: stereo Input #1, alsa, from 'hw:CARD=UHD,DEV=0': Duration: N/A, start: 1746391255.237803, bitrate: 1536 kb/s Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Stream #1:0 -> #0:1 (pcm_s16le (native) -> pcm_dvd (native)) Press [q] to stop, [?] for help [mpeg2video @ 0x558f72233280] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50fps+alsa_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A Stream #0:1: Audio: pcm_dvd, 48000 Hz, stereo, s16, 1536 kb/s Metadata: encoder : Lavc61.19.101 pcm_dvd [out#0/vob @ 0x558f7224c200] video:18921KiB audio:3756KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 1.320964% frame= 1000 fps= 50 q=2.5 Lsize= 22976KiB time=00:00:19.98 bitrate=9420.4kbits/s speed=0.998x
Stopped automatic with frame=1000 --------
du -sh * 23M 720x576_50fps+alsa_ms2130.mpg 19M 720x576_50fps_ms2130.mpg --------
ffprobe -hide_banner 720x576_50fps+alsa_ms2130.mpg
Input #0, mpeg, from '720x576_50fps+alsa_ms2130.mpg': Duration: 00:00:20.01, start: 0.520000, bitrate: 9408 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576 [SAR 1:1 DAR 5:4], 50 fps, 50 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 vbv_delay: N/A Stream #0:1[0xa0]: Audio: pcm_dvd, 48000 Hz, stereo, s16, 1536 kb/s
========================================
-----------------------
S-vido as well as audio L/R cables are connected between the camcorder out and A/D converter IN. Maybe additional configuration is required (I didn't think the separate sound card (Behringer U-Phono should be necessary) ----------
To list the v4l2 device capabilities;
v4l2-ctl -d /dev/video0 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT Type: Video Capture
[0]: 'YUYV' (YUYV 4:2:2) Size: Discrete 1920x1080 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1600x1200 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1360x768 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x1024 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x960 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1280x720 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 1024x768 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 800x600 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 720x576 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 720x480 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps) Size: Discrete 640x480 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.020s (50.000 fps) Interval: Discrete 0.033s (30.000 fps) Interval: Discrete 0.050s (20.000 fps) Interval: Discrete 0.100s (10.000 fps)
That is supported 10-20-30-50-60 fps for all sizes, not 25 fps!
so it looks like it does some frame/field interpolation (for s-video input) without letting user correct/disable this?
I don't see real drawback it makes progressive 50p PAL video output.
Does this device come with manual of any sort? Any Windows utility perhaps?
This is the ms2130 HDMI-USB3 dongle we also discussed in older threads: https://www.aliexpress.com/item/1005004883158574.html https://www.cnx-software.com/2022/11/07/ms2130-based-4k-hdmi-to-usb-3-0-vide... https://www.mail-archive.com/[email protected]/msg05587.html
The AV S-Video to HDMI converter is this one https://www.ebay.com.au/itm/356431236663?_trkparms=amclksrc%3DITM%26aid%3D11... <https://www.ebay.com.au/itm/356431236663?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20231107084023%26meid%3Dbe9608c9e82b4402bdf76dd76348ab53%26pid%3D101875%26rk%3D3%26rkt%3D4%26sd%3D405137532923%26itm%3D356431236663%26pmt%3D1%26noa%3D0%26pg%3D2332490%26algv%3DSimVIDwebV3WithCPCExpansionEmbeddingSearchQuerySemanticBroadMatchSingularityRecallReplaceKnnV4WithVectorDbNsOptHotPlRecall%26brand%3DUnbranded&_trksid=p2332490.c101875.m1851&itmprp=cksum%3A356431236663be9608c9e82b4402bdf76dd76348ab53%7Cenc%3AAQAKAAABYHKEKKNMUePryBh1zZl0qrjonWK6%252Bbjh8v6%252FxTRbw1Loxqx736BoO2V7ozv6W4xuOBJjwGhPLWk9lnRB2teM6PFgOrZGVcTwpTth7MW79p066SWQrB1VasW1Di58xl1RMBXsH%252BaNxpzil0t8bdqbPkgJlZgvtHVYNSkxo5xG%252Bq21xDVUvrBLotjMgH%252FqV5wXQshGzZM4R6lRyvrYsaYO6TKvrPFmelkCTCubM5eKn0qdO3WG4prHt35axM0b1AnPHppmlHMdGYmjckTyOKNM9%252FV6GLsHrR8V%252Ff%252B4IzCQPxMALQwAlk93n4I9O8AtpmJfVUqsoKsJZFWDdLSsj%252B4SwyzNEGDD0PvOh7nWjXVZBIKMAXxQ94%252B6ePFlKMbiIx4MUcjDAsxbXWMGCAgmUAUvyT8%252FjaimC0vYNMPEguAR4RrTGwG3aZFugrXdz9WAUWrYTwBHrcQRD06DIrkiCLvdErY%253D%7Campid%3APL_CLK%7Cclp%3A2332490&itmmeta=01JTDZ3923JE7AHB2E0118810J>
-------------
Try the same test for /dev/video1
v4l2-ctl -d /dev/video1 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
===========
ffmpeg listed available formats (supported pixel formats, video formats, and frame sizes) for a particular input device:
ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video0
[video4linux2,v4l2 @ 0x55a384b214c0] Raw : yuyv422 : YUYV 4:2:2 : 1920x1080 1600x1200 1360x768 1280x1024 1280x960 1280x720 1024x768 800x600 720x576 720x480 640x480 [in#0 @ 0x55a384b21200] Error opening input: Immediate exit requested Error opening input file /dev/video0.
And similar test for /dev/video1
ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video1
[video4linux2,v4l2 @ 0x557e1a5164c0] ioctl(VIDIOC_G_INPUT): Inappropriate ioctl for device [in#0 @ 0x557e1a516200] Error opening input: Inappropriate ioctl for device Error opening input file /dev/video1. Error opening input files: Inappropriate ioctl for device
===============
With supported 50 fps specified, ffplay playback looks ok visually:
ffplay -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 /dev/video0
Input #0, video4linux2,v4l2, from '/dev/video0':B sq= 0B Duration: N/A, start: 311.577886, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn ^Cterje@localhost:/Videoklipp/HDMI-USB3_Capture> sq= 0B
===============
Capture DVD compatible MPG video (no audio found) with supported 50 fps progressive video. No Audio stream!?
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -framerate 50 -i /dev/video0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 720x576_50fps_ms2130.mpg
Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 323.195348, bitrate: 331776 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 331776 kb/s, 50 fps, 50 tbr, 1000k tbn Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) Press [q] to stop, [?] for help [mpeg2video @ 0x55e390580200] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate! Output #0, vob, to '720x576_50fps_ms2130.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg2video Side data: cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: 20000000 vbv_delay: N/A [out#0/vob @ 0x55e390581e00] video:18921KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 1.242550% frame= 1000 fps= 50 q=2.5 Lsize= 19156KiB time=00:00:19.98 bitrate=7854.2kbits/s speed=0.998x
Stopped automatic ! Why?
may be usb cable just moved a bit?
No, next test also stopped at frame=1000 Maybe this is some security default for "still" camcorder (Sony TR2000) on a desk mount where the image is not changed or moved. I have not tested playback of real S-video tape recordings.
try to remove "-t 20" part of ffmpeg command line? or change it to 60 (seconds) or something suitable for longer tests ...
Yes, thanks for discovering that. I changed -t from 20 to 30 (sec) and got 1500 frames :)
at least AV to hdmi box should come with manual ;)
I surely have them somewhere long down in the paper chunks. But I think I initially read them and didn't find something of special interest. The most important for me was the features and specifications collected from web sites.
hopefully there is copy somewhere online ...
Yes, for the HDMI to USB3 capture dongle: specs: https://www.ebay.com/itm/394316094286 manual https://manuals.plus/rullz/ms2130-hdmi-video-capture-manual
Sorry, I missed initially that you use TWO devices to get s-video into your workstation. Yes, it was in email subject line.
Happy capturing!
----------------
du -sh *
19M 720x576_50fps_ms2130.mpg
ffprobe -hide_banner 720x576_50fps_ms2130.mpg
Input #0, mpeg, from '720x576_50fps_ms2130.mpg': Duration: 00:00:20.00, start: 0.520000, bitrate: 7846 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 720x576 [SAR 1:1 DAR 5:4], 50 fps, 50 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 vbv_delay: N/A
The video file playback looks ok with correct SD aspect ratio using ffplay and VLC, though "1080P" is printer near the top-right corner.
hm ...... I hope this "overlay" can be disabled?
============================
participants (2)
-
Andrew Randrianasulu -
Terje J. Hanssen