[Cin] Analog S-Video or HDV capture via HDMI-USB to FFV1.mkv in realtime
Terje J. Hanssen
terjejhanssen at gmail.com
Wed Feb 8 12:47:37 CET 2023
Den 08.02.2023 02:38, skrev Andrew Randrianasulu:
>
>
> ср, 8 февр. 2023 г., 04:08 Terje J. Hanssen <terjejhanssen at gmail.com>:
>
>
>
> Den 08.02.2023 00:52, skrev Andrew Randrianasulu:
>>
>>
>> ср, 8 февр. 2023 г., 01:35 Terje J. Hanssen via Cin
>> <cin at lists.cinelerra-gg.org>:
>>
>>
>>
>> Den 02.02.2023 01:46, skrev Terje J. Hanssen:
>>> .......
>>
>>> but I prepare myself to test and use one method left with
>>> regards to "Personal Video Archiving".
>>>
>>> Therefore I have ordered two selected, inexpensive devices
>>> (the urls here are just for English language):
>>>
>>> 1) Capture Card USB HDMI 4K to 1080P USB-C adapter (Speedy
>>> USB 3.2/3.1/3.0, 60 Hz and 1080p FHD.)
>>> https://www.turascandinavia.com/en/products/computer/microphone-webcam/webcams/74257
>>>
>>> * Fluid video recordings without delays or distortions
>>> during live streaming
>>> * Linux not mentioned, but assumed this is a standard
>>> supported UVC. OBS and VLC is mentioned.
>>>
>>
>> Then the first item, Hama Video Recording Stick, HDMI 4k -
>> USB3.x is received. It promises:
>> "Fluid video recordings without delays or distortions during
>> live streaming, thanks to a picture frequency of 60 Hz and
>> 1080p with Full HD. Transform high-quality video cameras into
>> a high-resolution USB web camera".
>>
>> I have done a quick, first test using my Sony HDR-FX7E
>> camera. This is a HDV 1080i camcorder with MPEG-2 video
>> compression at 25 mbps on tape 1440x1080, 50i25fps, 4:2:0 and
>> MP2 stereo audio. Currently it's cassette deck is broken and
>> needs repair service.
>>
>> But according to Steve Mullen's V1 and FX7 handbook (not
>> mentioned in the manual):
>>
>> 1. When the camera is operating, the EIP (Enhanced Image
>> Processor) generates uncompressed 1440x1080i with a 4:2:2
>> color space. Digital 4:2:2 data are output via the HDMI
>> port while 4:2:2 analog is output via component-out.
>> Therefore, you can record 4:2:2 live HD video from the
>> camera without MPEG-2 compression. V1 and FX7 provide an
>> HDMI output port that carries uncompressed 4:2:2, 8-bit,
>> digital video plus dual-channel, PCM, 16-bit, 48kHz audio
>> When the camera is running.
>>
>> 2. If you are playing a 1080i50 or 1080i60 HDV tape. The
>> 4:2:0 MPEG-2 is decoded and chroma up-scaled to a 4:2:2.
>> The HDMI
>> chip downscales 1440 to 1280 while it up-scales 540 to
>> 720. The result is 720p50 or 720p60, which is output via
>> HDMI.
>>
>> That is, I have tested section 1 now, but see now that I
>> didn't test 1440x1080 resolution. The only resolution I got
>> to work at 25 fps was 720x576 (SD), while HD 1280x720 and FHD
>> 1920x1080 were set down to 10 fps and 5 fps respectively by
>> the driver and caused jumpy playback.
>>
>>
>> Did you tried to force specific format (uncompressed) before -i
>> parameter for ffmpeg?
>
> Just "-framerate 25 -video_size 1920x1080" before -i as repeated
> in the code as follows, where I tested to encode to uncompressed
> v210 instead of ffv1, but with no change with regards to low 5 fps:
>
> ffmpeg -hide_banner -f v4l2 -framerate 25 -video_size 1920x1080 -i
> /dev/video0 -codec:v v210 -codec:a pcm_s16le -f matroska
> 1920x1080_v210.mkv
> [video4linux2,v4l2 @ 0x55944900e0c0] The driver changed the time
> per frame from 1/25 to 1/5
>
> I also read a related issue and reply to this post at Superuser,
> where 1920x1080 was not supported on the webcam.
> https://superuser.com/questions/1449252/ffmpeg-captures-from-uvc-dev-video0-in-any-resolution-except-for-1920x1080
>
>> Also look out for usb2 vs usb3 ports? Shouldn't capture device
>> hang on bus 002 (usb 3.0) root hub, instead of bus 001 (usb 2.0
>> root hub), from lsusb below?
>
> This may well work better. I have to admit that I have never
> studied the difference between shared usb buses. My thought was to
> try to change the connected usb devices, but tested first the only
> free usb3 port (blue) on the add-on frontpanel of the workstation.
> The other two usb3 ports are on the backpanel and are used for the
> Asus blu-ray burner and 8TB Seagate expansion video disc.
>
> The other usb ports on both panels are usb2 ports, whereof two for
> the wireless keyboard and mouse on the fronpanel. What I possibly
> already have mentioned before, is that sometimes if I connect a
> usb(2) device or memory to the usb3 port on the frontpanel, this
> cause hang on the keyboard or mouse. But this didn't happend this
> time with the USB3 capture stick.
>
>>
>>
>>
>> Someone here that have suggestion to possibly modified syntax
>> or can verify that the driver doesn't manage this?
>>
>> Another (setup) problem, there was no audio recorded or heard
>> during playback!?
>>
>> In the following I list the test command syntax I've
>> collectedf and tried with shortened output (yet long):
>> To explain, I have also another USB 2.0 Webcam connected,
>> beside the new HDMI-USB3 Videstick.
>>
>> Verify the devices, drivers and formats:
>> ---------------------------------------
>> dmesg | tail
>> [22706.060759] perf: interrupt took too long (2521 > 2500),
>> lowering kernel.perf_event_max_sample_rate to 79250
>> [32105.561575] perf: interrupt took too long (3158 > 3151),
>> lowering kernel.perf_event_max_sample_rate to 63250
>> [40586.477420] usb 1-5: USB disconnect, device number 2
>> [40599.099612] usb 1-5: new high-speed USB device number 5
>> using xhci_hcd
>> [40599.250960] usb 1-5: New USB device found, idVendor=534d,
>> idProduct=2109, bcdDevice=21.00
>> [40599.250972] usb 1-5: New USB device strings: Mfr=1,
>> Product=2, SerialNumber=0
>> [40599.250978] usb 1-5: Product: USB Video
>> [40599.250984] usb 1-5: Manufacturer: MACROSILICON
>> [40599.252310] usb 1-5: Found UVC 1.00 device USB Video
>> (534d:2109)
>> [40599.256234] hid-generic 0003:534D:2109.0006:
>> hiddev96,hidraw0: USB HID v1.10 Device [MACROSILICON USB
>> Video] on usb-0000:00:14.0-5/input4
>> -----------------------------
>>
>> lsusb
>> Bus 002 Device 003: ID 05e3:0732 Genesys Logic, Inc.
>> All-in-One Cardreader
>> Bus 002 Device 002: ID 0bc2:2038 Seagate RSS LLC Expansion HDD
>> Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
>> Bus 001 Device 003: ID 046d:c534 Logitech, Inc. Unifying Receiver
>> Bus 001 Device 005: ID 534d:2109 MacroSilicon USB Video
>> Bus 001 Device 004: ID 0c45:6340 Microdia Camera
>> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>>
>>
>> udevadm info /dev/video* | egrep 'DEVNAME|ID_V4L_PRODUCT'
>> E: DEVNAME=/dev/video0
>> E: ID_V4L_PRODUCT=USB Video: USB Video
>> E: DEVNAME=/dev/video1
>> E: ID_V4L_PRODUCT=USB Video: USB Video
>> E: DEVNAME=/dev/video2
>> E: ID_V4L_PRODUCT=USB 2.0 Camera: HD 720P Webcam
>> E: DEVNAME=/dev/video3
>> E: ID_V4L_PRODUCT=USB 2.0 Camera: HD 720P Webcam
>>
>> lsusb | egrep 'Video|Camera'
>> Bus 001 Device 005: ID 534d:2109 MacroSilicon USB Video
>> Bus 001 Device 004: ID 0c45:6340 Microdia Camera
>>
>> --------------------
>>
>> ll /dev/video*
>> crw-rw----+ 1 root video 81, 0 feb. 7 20:22 /dev/video0
>> crw-rw----+ 1 root video 81, 1 feb. 7 20:22 /dev/video1
>> crw-rw----+ 1 root video 81, 2 feb. 7 09:05 /dev/video2
>> crw-rw----+ 1 root video 81, 3 feb. 7 09:05 /dev/video3
>>
>> -----------------------
>>
>> v4l2-ctl --list-devices
>> USB 2.0 Camera: HD 720P Webcam (usb-0000:00:14.0-11):
>> /dev/video2
>> /dev/video3
>>
>> USB Video: USB Video (usb-0000:00:14.0-5):
>> /dev/video0
>> /dev/video1
>>
>> -------------------------
>>
>> ffmpeg -f v4l2 -list_formats all -i /dev/video0
>> ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video0
>> [video4linux2,v4l2 @ 0x556cf63570c0] Compressed: mjpeg
>> : Motion-JPEG : 1920x1080 1600x1200 1360x768 1280x1024
>> 1280x960 1280x720 1024x768 800x600 720x576 720x480 640x480
>> [video4linux2,v4l2 @ 0x556cf63570c0] Raw : yuyv422
>> : YUYV 4:2:2 : 1920x1080 1600x1200 1360x768
>> 1280x1024 1280x960 1280x720 1024x768 800x600 720x576 720x480
>> 640x480
>> /dev/video0: Immediate exit requested
>>
>> ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video1
>> [video4linux2,v4l2 @ 0x5560c0bc70c0] ioctl(VIDIOC_G_INPUT):
>> Inappropriate ioctl for device
>> /dev/video1: Inappropriate ioctl for device
>> ----------------
>>
>> v4l2-ctl --all
>> Driver Info (not using libv4l2):
>> Driver name : uvcvideo
>> Card type : USB Video: USB Video
>> Bus info : usb-0000:00:14.0-5
>> Driver version: 5.14.21
>> Capabilities : 0x84A00001
>> Video Capture
>> Metadata Capture
>> Streaming
>> Extended Pix Format
>> Device Capabilities
>> Device Caps : 0x04200001
>> Video Capture
>> Streaming
>> Extended Pix Format
>> Priority: 2
>> Video input : 0 (Camera 1: ok)
>> Format Video Capture:
>> Width/Height : 1920/1080
>> Pixel Format : 'MJPG'
>> Field : None
>> Bytes per Line : 0
>> Size Image : 4147200
>> Colorspace : sRGB
>> Transfer Function : Rec. 709
>> YCbCr/HSV Encoding: ITU-R 601
>> Quantization : Default (maps to Full Range)
>> Flags :
>> Crop Capability Video Capture:
>> Bounds : Left 0, Top 0, Width 1920, Height 1080
>> Default : Left 0, Top 0, Width 1920, Height 1080
>> Pixel Aspect: 1/1
>> Selection: crop_default, Left 0, Top 0, Width 1920, Height 1080
>> Selection: crop_bounds, Left 0, Top 0, Width 1920, Height 1080
>> Streaming Parameters Video Capture:
>> Capabilities : timeperframe
>> Frames per second: 30.000 (30/1)
>> Read buffers : 0
>> brightness 0x00980900 (int) :
>> min=-128 max=127 step=1 default=-11 value=-11
>> contrast 0x00980901 (int) : min=0
>> max=255 step=1 default=148 value=148
>> saturation 0x00980902 (int) : min=0
>> max=255 step=1 default=180 value=180
>> hue 0x00980903 (int) :
>> min=-128 max=127 step=1 default=0 value=0
>>
>> -----------------
>>
>> v4l2-ctl --list-formats-ext
>> ioctl: VIDIOC_ENUM_FMT
>> Index : 0
>> Type : Video Capture
>> Pixel Format: 'MJPG' (compressed)
>> Name : Motion-JPEG
>> Size: Discrete 1920x1080
>> Interval: Discrete 0.017s (60.000 fps)
>> Interval: Discrete 0.033s (30.000 fps)
>> Interval: Discrete 0.040s (25.000 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 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)
>>
>
>
> well, it seems we know by now why this device was ...unexpensive.
Yes, I have a "90-days open order" and will start to search for another,
better UVC video capture device.
The problem is the lack of definitive specifications, compared with my
proprietary BMD devices.
>
> it really seems to report only 5-10 fps at fullHD uncompresed,
> anything bigger is mjpeg ...
Type : Video Capture
Pixel Format: 'YUYV'
Name : YUYV 4:2:2
Size: Discrete 1920x1080
Interval: Discrete 0.200s (5.000 fps)
This can absolutely not be what they promote as:
"Fluid video recordings without delays or distortions during live
streaming, thanks to a picture frequency of 60 Hz and 1080p with Full HD".
>
> https://superuser.com/questions/1449252/ffmpeg-captures-from-uvc-dev-video0-in-any-resolution-except-for-1920x1080
I also tried that link's suggested syntax
|ffmpeg -y -t 15 -f video4linux2 -video_size 1920x1080 -input_format
nv12 -timestamps abs -use_libv4l2 1 -i /dev/video0 out.mov|
but it didn't work for me, just quitted ffmpeg with
Unrecognized option 'timestamps'.
Error splitting the argument list: Option not found
Looking at ffmpeg man pages at https://manpages.org/ffmpeg/1 there also
is a similar video4linux2 syntax example
Grab and record the input of a video4linux2 device, leave the frame
rate and size as previously set:
ffmpeg -f video4linux2 -input_format mjpeg -i /dev/video0 out.mpeg
* video_size
* Set the video frame size. The argument must be a string in the
form WIDTHxHEIGHT or a valid size abbreviation.
* pixel_format
* Select the pixel format (only valid for raw video input).
* input_format
* Set the preferred pixel format (for raw video) or a codec name.
This option allows one to select the input format, when several are
available.
But what should be set as input_format in this case?
>
>
>
>>
>> Index : 1
>> Type : Video Capture
>> Pixel Format: 'YUYV'
>> Name : YUYV 4:2:2
>> Size: Discrete 1920x1080
>> Interval: Discrete 0.200s (5.000 fps)
>> ......
>> Size: Discrete 1280x720
>> Interval: Discrete 0.100s (10.000 fps)
>> .......
>> Size: Discrete 720x576
>> Interval: Discrete 0.040s (25.000 fps)
>> Interval: Discrete 0.050s (20.000 fps)
>> Interval: Discrete 0.100s (10.000 fps)
>> Interval: Discrete 0.200s (5.000 fps)
>> .........
>>
>> Encoding:
>> --------
>> ffmpeg -hide_banner -f v4l2 -framerate 25 -video_size 720x576
>> -i /dev/video0 -codec:v ffv1 -codec:a pcm_s16le -f matroska
>> 720x576_ffv1.mkv
>>
>> ffmpeg -hide_banner -f v4l2 -framerate 25 -video_size
>> 1280x720 -i /dev/video0 -codec:v ffv1 -codec:a pcm_s16le -f
>> matroska 1280x720_ffv1.mkv
>> [video4linux2,v4l2 @ 0x559d031190c0] The driver changed the
>> time per frame from 1/25 to 1/10
>>
>> ffmpeg -hide_banner -f v4l2 -framerate 25 -video_size
>> 1920x1080 -i /dev/video0 -codec:v ffv1 -codec:a pcm_s16le -f
>> matroska 1920x1080_ffv1.mkv
>> [video4linux2,v4l2 @ 0x55ce18d060c0] The driver changed the
>> time per frame from 1/25 to 1/5
>>
>> ffmpeg -hide_banner -f v4l2 -framerate 25 -video_size
>> 1920x1080 -i /dev/video0 -codec:v v210 -codec:a pcm_s16le -f
>> matroska 1920x1080_v210.mkv
>> [video4linux2,v4l2 @ 0x55944900e0c0] The driver changed the
>> time per frame from 1/25 to 1/5
>>
>>
>> Recorded test video files and probing formats:
>> ---------------------------------------------
>>
>> du -sh *
>> 258M 1280x720_ffv1.mkv
>> 292M 1920x1080_ffv1.mkv
>> 1,1G 1920x1080_v210.mkv
>> 61M 720x576_ffv1.mkv
>> -----------------------------
>>
>>
>> ffprobe -hide_banner 720x576_ffv1.mkv
>> Input #0, matroska,webm, from '720x576_ffv1.mkv':
>> Metadata:
>> ENCODER : Lavf58.76.100
>> Duration: 00:00:09.20, start: 0.000000, bitrate: 55385 kb/s
>> Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p(tv,
>> progressive), 720x576, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
>> Metadata:
>> ENCODER : Lavc58.134.100 ffv1
>> DURATION : 00:00:09.200000000
>> -----------
>>
>> ffprobe -hide_banner 1280x720_ffv1.mkv
>> Input #0, matroska,webm, from '1280x720_ffv1.mkv':
>> Metadata:
>> ENCODER : Lavf58.76.100
>> Duration: 00:00:38.90, start: 0.000000, bitrate: 55512 kb/s
>> Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p(tv,
>> progressive), 1280x720, 10 fps, 10 tbr, 1k tbn, 1k tbc (default)
>> Metadata:
>> ENCODER : Lavc58.134.100 ffv1
>> DURATION : 00:00:38.900000000
>> --------------
>>
>> ffprobe -hide_banner 1920x1080_ffv1.mkv
>> Input #0, matroska,webm, from '1920x1080_ffv1.mkv':
>> Metadata:
>> ENCODER : Lavf58.76.100
>> Duration: 00:00:53.40, start: 0.000000, bitrate: 45747 kb/s
>> Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p(tv,
>> progressive), 1920x1080, 5 fps, 5 tbr, 1k tbn, 1k tbc (default)
>> Metadata:
>> ENCODER : Lavc58.134.100 ffv1
>> DURATION : 00:00:53.400000000
>> ----------------
>>
>> ffprobe -hide_banner 1920x1080_v210.mkv
>> [matroska,webm @ 0x5563ca6d30c0] Stream #0: not enough frames
>> to estimate rate; consider increasing probesize
>> Input #0, matroska,webm, from '1920x1080_v210.mkv':
>> Metadata:
>> ENCODER : Lavf58.76.100
>> Duration: 00:00:41.40, start: 0.000000, bitrate: 221185 kb/s
>> Stream #0:0: Video: v210 (v210 / 0x30313276),
>> yuv422p10le(tv, progressive), 1920x1080, 5 fps, 1k tbr, 1k
>> tbn, 1k tbc (default)
>> Metadata:
>> ENCODER : Lavc58.134.100 v210
>> DURATION : 00:00:41.400000000
>>
>> ---------------------------
>>
>>
>>>
>>> 2) Scart AV SV to HDMI Converter Switcher S Video Composite
>>> RCA DVD HD TV adapter (3-4 weeks delivery time
>>> https://www.ebay.com.au/itm/295472602625
>>>
>>> * The 3-in-1 S-/video/RCA/SCART to HDMI converter is a
>>> universal converter for analog video input to HDMI output.
>>> * Analog to digital converter (ADC), 10 bits maximum 1,62
>>> MSPS sampling,
>>>
>>>
>>>
>>> Q I have not yet found a definitiv ffmpeg FFV1 v 3 syntax
>>> guide for SD and HDV capturing and hope for suggestions and
>>> comments here!?
>>>
>>> 3.1 FFmpeg recipe (PAL)
>>>
>>> ffmpeg -i VIDEO_IN \
>>>
>>> -c:v ffv1 -level 3 -coder 1 -context 0 -slices 24
>>> -slicecrc 1 \
>>> -color_primaries bt470bg \
>>> -color_trc bt709 \
>>> -colorspace bt470bg \
>>> -color_range mpeg \
>>> -map 0 \
>>> -top 1 \
>>> -c:a copy \
>>> -g 1 -pix_fmt + \
>>> VIDEO_OUT.mkv
>>>
>>>
>>> 3.2 Reference Example
>>> https://trac.ffmpeg.org/wiki/Encode/FFV1
>>>
>>> Copy audio "as-is" and use FFV1.3 as video codec.
>>>
>>> Parameters are 8 threads, coder=1, context=1,
>>> GOP-size=1, 24 slices and slice-CRC on:
>>>
>>> ffmpeg -i <input_video> \
>>> -acodec copy \
>>> -vcodec ffv1 -level 3 \
>>> -threads 8 \
>>> -coder 1 \
>>> -context 1 \
>>> -g 1 \
>>> -slices 24 \
>>> -slicecrc 1 \
>>> <output_video>
>>>
>>>
>>> 3.3 Various Encoding examples for Video capture from USB
>>> camera /dev/video0:
>>>
>>> ffmpeg -f v4l2 -framerate 25 -video_size 720x576 -i
>>> /dev/video0 output_data.mkv
>>>
>>> ffmpeg -f v4l2 -framerate 25 -video_size 720x576 -i
>>> /dev/video0 -codec:v ffv1 -codec:a pcm_s16le \
>>> -f matroska output_video.mkv
>>>
>>> Check that video is captured properly using ffplay:
>>>
>>> ffmpeg -ar 44100 -thread_queue_size 1024 -f alsa -i $AUDIO \
>>> -r 25 -thread_queue_size 1024 -i $VIDEO \
>>> -codec copy -f matroska - | ffplay -
>>>
>>> Check the overall flow using ffplay before capturing:
>>>
>>> ffmpeg -ar 44100 -thread_queue_size 1024 -f alsa -i $AUDIO \
>>> -itsoffset -0.5 -r 25 -thread_queue_size 1024 -i $VIDEO \
>>> -filter_complex 'channelmap=FL-0' -filter_complex
>>> 'crop=w=700:h=556:x=8:y=0' \
>>> -map 1:v -map 0:a -codec:v ffv1 -codec:a pcm_s16le \
>>> -f matroska - | ffplay -
>>>
>>>
>>>
>>> 4, Regarding FFV1 lossless compression in realtime
>>> Comparison tests (2013/2015) have shown that FFV1 produced
>>> the smallest files at the fastest speed. It can be used to
>>> capture SD material in realtime, and HD possibly, too. This
>>> according to a 2012/2015 article, where I have extracted the
>>> results for FFV1 v.3 in the tables below:
>>>
>>> http://www.av-rd.com/knowhow/video/comparison_video_codecs_containers.html#codec_tests
>>> NOTE: This is a consumer grade, off-the-shelf PC setup.
>>>
>>> Hardware:
>>> CPU: Intel(R) QuadCore(TM) i7-2600K CPU @ 3.40GHz
>>> RAM: 8 GB
>>> Disk: Intel SSDSA2CW080G3 (SSD)
>>> Software:
>>> Operating System: GNU/Linux (Xubuntu 12.04.1, 64bit)
>>> Transcoding tool: FFmpeg (version git N-59183-g3e62654, Dec
>>> 17 2013)
>>>
>>>
>>> Video source file: VQEG reference video "football"
>>> <http://media.xiph.org/video/derf/y4m/football_422_ntsc.y4m>
>>> (NTSC-SD, 720x486px, 30fps, yuv422p, 8bpc)
>>> Codec Encoding Decoding Filesize % of uncompressed
>>> Implementation Details
>>> FFV1
>>> <http://www.av-rd.com/knowhow/video/comparison_video_codecs_containers.html#codec_ffv1>
>>> (version 3) 216 fps 277 fps 111 MiB 46.1% libavcodec
>>> (FFmpeg) <http://en.wikipedia.org/wiki/Libavcodec> log
>>> <http://www.av-rd.com/knowhow/video/test_results/football-720x486i30/ffv1.3-libavcodec_ffmpeg_avi.log>,
>>> framemd5
>>> <http://www.av-rd.com/knowhow/video/test_results/football-720x486i30/ffv1.3-libavcodec_ffmpeg_avi.framemd5>
>>>
>>>
>>>
>>>
>>> Video source file: SVT reference video "park joy"
>>> <http://media.xiph.org/video/derf/y4m/park_joy_1080p50.y4m>
>>> (full-HD/1080p, 1920x1080px, 50fps, yuv420p, 8bpc)
>>> Codec Encoding Decoding Filesize % of uncompressed
>>> Implementation Details
>>> FFV1
>>> <http://www.av-rd.com/knowhow/video/comparison_video_codecs_containers.html#codec_ffv1>
>>> (version 3) 31 fps 63 fps 879 MiB 57.2% libavcodec
>>> (FFmpeg) <http://en.wikipedia.org/wiki/Libavcodec> log
>>> <http://www.av-rd.com/knowhow/video/test_results/park_joy-1920x1080p50/ffv1.3-libavcodec_ffmpeg_avi.log>,
>>> framemd5
>>> <http://www.av-rd.com/knowhow/video/test_results/park_joy-1920x1080p50/ffv1.3-libavcodec_ffmpeg_avi.framemd5>
>>>
>>>
>>>
>>>
>>>
>>> PAL-SD 720x576 stored as YUV422, 10 bpc (bits per
>>> component), instead of the tested 8 bpc above, seems to me
>>> would have enlarged the the filesizes with about 25%, or to
>>> about 40 GB/hr with FFV1 lossless compressed.
>>>
>>> Although the FFV1 compression results above obviously used
>>> yuv422p, 8bps source SD and FHD files as input, it seems for
>>> me that the encoding speeds at 216 fps and 31 fps for SD and
>>> FHD respectively, assumingly should manage realtime FFV1
>>> encoding and streaming of PAL SD and HDV at 25 fps as well,
>>> especially with a faster i7-6700 x 8 cpu. Comments here?
>>>
>>>
>>> 5. Related 2021-[Cin] threads as background references
>>>
>>> [Cin] hdmi capture card (with v4l2)
>>> https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg02865.html
>>>
>>> [Cin] offtopic: Digitize and record Video with A/D USB adapters
>>> https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03269.html
>>>
>>> [Cin] offtopic: HDMI capture
>>> https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg02084.html
>>>
>>> [Cin] Is SD and HD 422 Video Capture obtainable with V4L(2)?
>>> https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03719.html
>>>
>>> [Cin] Uncompressed video to lossless compression FFV1/MKV
>>> https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03791.html
>>
>> --
>> Cin mailing list
>> Cin at lists.cinelerra-gg.org
>> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>>
>
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