I consider to make a second preservation backup for archiving my Analog S-video and HDV footages on tapes to lossless compressed FFV1.MKV files stored on large USB3 expansion disks. Also ffv1 HW (vulkan) decoding (next and encoding (later?) are of interest in this context. Related previous threads https://www.mail-archive.com/[email protected]/msg05547.html https://www.mail-archive.com/[email protected]/msg03791.html https://www.mail-archive.com/[email protected]/msg05547.html I adapt simply the last ffmpeg mpeg-2 code line to a first ffv1, version 3 test, 10 sec file 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 ffv1 -level 3 -c:a pcm_s16le -t 10 720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv Input #0, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 351.803278, 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 @ 0x555a99736cc0] Guessed Channel Layout: stereo Input #1, alsa, from 'hw:CARD=UHD,DEV=0': Duration: N/A, start: 1746445045.742179, 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) -> ffv1 (native)) Stream #1:0 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native)) Press [q] to stop, [?] for help Output #0, matroska, to '720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p(tv, progressive), 720x576, q=2-31, 200 kb/s, 50 fps, 1k tbn Metadata: encoder : Lavc61.19.101 ffv1 Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s Metadata: encoder : Lavc61.19.101 pcm_s16le [out#0/matroska @ 0x555a99736f40] video:57467KiB audio:1875KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.069226% frame= 500 fps= 50 q=-0.0 Lsize= 59383KiB time=00:00:10.00 bitrate=48646.9kbits/s speed=0.998x ---------- du -sh * 58M 720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv ---------- ffprobe -hide_banner 720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv Input #0, matroska,webm, from '720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv': Metadata: ENCODER : Lavf61.7.100 Duration: 00:00:10.00, start: 0.000000, bitrate: 48646 kb/s Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p(tv, progressive), 720x576, 50 fps, 50 tbr, 1k tbn Metadata: ENCODER : Lavc61.19.101 ffv1 DURATION : 00:00:10.000000000 Stream #0:1: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s Metadata: ENCODER : Lavc61.19.101 pcm_s16le DURATION : 00:00:10.000000000 ------------ mediainfo 720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv General Unique ID : 158479793538002634101121179263279280827 (0x773A19163BEA6038DF448CE1529BB2BB) Complete name : 720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv Format : Matroska Format version : Version 4 File size : 58.0 MiB Duration : 10 s 0 ms Overall bit rate mode : Variable Overall bit rate : 48.6 Mb/s Frame rate : 50.000 FPS Writing application : Lavf61.7.100 Writing library : Lavf61.7.100 ErrorDetectionType : Per level 1 Video ID : 1 Format : FFV1 Format version : Version 3.4 Format settings, Slice count : 4 slices per frame Codec ID : V_MS/VFW/FOURCC / FFV1 Duration : 10 s 0 ms Bit rate mode : Variable Bit rate : 46.1 Mb/s Width : 720 pixels Height : 576 pixels Display aspect ratio : 5:4 Frame rate mode : Constant Frame rate : 50.000 FPS Color space : YUV Chroma subsampling : 4:2:2 Bit depth : 8 bits Scan type : Progressive Compression mode : Lossless Bits/(Pixel*Frame) : 2.225 Stream size : 55.0 MiB (95%) Writing library : Lavc61.19.101 ffv1 Default : No Forced : No Color range : Limited coder_type : Golomb Rice ErrorDetectionType : Per slice Audio ID : 2 Format : PCM Format settings : Little / Signed Codec ID : A_PCM/INT/LIT Duration : 10 s 0 ms Bit rate mode : Constant Bit rate : 1 536 kb/s Channel(s) : 2 channels Sampling rate : 48.0 kHz Bit depth : 16 bits Stream size : 1.83 MiB (3%) Writing library : Lavc61.19.101 pcm_s16le Default : No Forced : No --------------------------------- As seen above the "default" Chroma subsampling is yuv422p or 4:2:2 with Bit depth: 8 bits As ffv1 seemingly also does support yuv422p10le ffmpeg, I wonder if yuv422p is limited by the input from HDMI capture/AV converter? Can possibly yuv422p10le possibly be achieved by adding -pix_fmt 10 og similar syntax to the ffmpeg line?