[Cin] Analog S-Video to Digital HDMI converter + ms2130 UHD HDMI-USB3 Capture card

[Terje J. Hanssen]

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)





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