May 2025 - Cin - Cinelerra-GG Mailing Lists

Wide-gamut test page for browsers
by Andrew Randrianasulu 12 May '25

12 May '25

https://www.wide-gamut.com/test My cheap tablet with Android 11 + firefox fails on both fronts. Interestingly, video embedded at first tab is just 8bit h264 according to mediainfo https://www.wide-gamut.com/assets/video-hdr/P3-BLUE-HDR-1000nits.mp4 Interesting to see that baaack in 2004 or 2005 when it was mostly research 8bit per component was considered ok for HDR video, but I guess further research disproved that early hope?

1 0

HDR still image trick
by Andrew Randrianasulu 11 May '25

11 May '25

https://discourse.radiance-online.org/t/hdr-display-options/1081/2 ==== [...] Various researchers have built their own systems by combining a DLP projector with an LCD display with it's backlight "hinged" out of the way, a la the original paper by Seetzen et al: Seetzen, Helge, W. Heidrich, W. Stuezlinger, G. Ward, L. Whitehead, M. Trentacoste, A. Ghosh, A. Vorozcovs, "High Dynamic Range Display Systems," ACM Trans. Graph. (special issue SIGGRAPH 2004), August 2004. For my own use, I still have the HDR viewer I made over a decade ago: Ward, Greg, "A Wide Field, High Dynamic Range, Stereographic Viewer," Proceedings of PICS 2002, April 2002. By far the easiest (and cheapest) solution for still images is to print out a grayscale version of the square root of your image (with maximum normalized to 1.0) as described in the above paper, but as a large-format print. I would make this one the image with exaggerated contrast, since you can print it at high-resolution. Then, project the original image divided by this grayscale image using a standard DLP or LCD projector -- preferably a bright one although it doesn't need to be high-resolution, onto this print. Line it up, and violá! You have a high-resolution, high dynamic range still image. There's no way to make it move, sadly. -Greg ===== quote ends here ====

1 0

zscale's tonemapping on input
by Andrew Randrianasulu 11 May '25

11 May '25

Using this page https://www.reddit.com/r/ffmpeg/comments/17ma3mm/hdr_tone_mapping_not_worki… and our guide at https://cinelerra-gg.org/download/CinelerraGG_Manual/File_naming_convention… I come up with this (working) line to put in file.opts for HDR to SDR bt 709 100 nits mapping: video_filter=zscale=t=linear:npl=100,format=gbrpf32le,zscale=p=bt709,tonemap=tonemap=hable:desat=0,zscale=t=bt709:m=bt709:r=tv,format=yuv444p But it only works with software decoding. At, like, 2.3 fps for full 4k frame. And also you need to compile your ffmpeg used in cingg with z.img library.

4 14

Smaller HEVC HDR test file
by Andrew Randrianasulu 10 May '25

10 May '25

https://cloud.mail.ru/public/pgQ6/g4XNRF3ye I created smaller 18 mbytes test file (actually 480p) for testing, like this ~/bin//ffmpeg8-vk -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -vf scale=-2:480 -c:a copy -c:s copy -c:v libx265 -t 25 -g 5 -crf 20 -f mp4 /dev/shm/hevc_720p.mp4 If you look at it WITHOUT tonemapping it will look very washed out. If you add tonemapping it will look much more lively (all on SDR display of course)

2 2

Dynamic_input filters and avfilter_pad_get_type
by Andrew Randrianasulu 09 May '25

09 May '25

I was looking at why our application (cinelerra-gg) crashed at trying to use libplacebo I found that libplacebo defines itself https://ffmpeg.org/doxygen/7.0/vf__libplacebo_8c.html as .flags = AVFILTER_FLAG_HWDEVICE <https://ffmpeg.org/doxygen/7.0/group__lavfi.html#ga01e3b7175b4477235061256f…> | AVFILTER_FLAG_DYNAMIC_INPUTS <https://ffmpeg.org/doxygen/7.0/group__lavfi.html#gae6ed6c10a03508829bdf1756…> , so only output pad is defined, as far as I can see: static const AVFilterPad <https://ffmpeg.org/doxygen/7.0/structAVFilterPad.html> libplacebo_outputs <https://ffmpeg.org/doxygen/7.0/vf__libplacebo_8c.html#a3545e8f08cc238430300…>[] = { { .name <https://ffmpeg.org/doxygen/7.0/structAVFilterPad.html#afc112061a6035639934e…> = "default", .type = AVMEDIA_TYPE_VIDEO <https://ffmpeg.org/doxygen/7.0/group__lavu__misc.html#gga9a84bba4713dfced21…> , .config_props = &libplacebo_config_output <https://ffmpeg.org/doxygen/7.0/vf__libplacebo_8c.html#a09a97380118a876bb5fc…> , }, }; then when our code calls avfilter_pad_get_type() it promptly crashes. BC_Signals::dump_stack cin() [0x8b2c9e2] linux-gate.so.1(__kernel_rt_sigreturn+0) [0xf7fb8590] cin(avfilter_pad_get_type+0x14) [0x99266a4] cin(_ZN13FFVideoStream13create_filterEPKc+0xbc) [0x865669c] cin(_ZN6FFMPEG12open_decoderEv+0x80f) [0x865732f] cin(_ZN10FileFFMPEG9check_sigEP5Asset+0x81) [0x8670071] cin(_ZN4File5probeEv+0x376) [0x867cd86] cin(_ZN4File9open_fileEP11PreferencesP5Assetii+0x378) [0x867d628] cin(_ZN7MWindow14load_filenamesEP9ArrayListIPcEiii+0x250) [0x87301f0] cin(_ZN17CommandLineThread3runEv+0x53) [0x86e2cd3] cin(_ZN6Thread10entrypointEPv+0x41) [0x8b70c11] /lib/libpthread.so.0(+0x7328) [0xf7df9328] /lib/libc.so.6(clone+0x66) [0xf0373f06] We still hope to get libplacebo's tonemapping + vulkan hevc decoding going, so any pointers how to talk to those dynamic_input filters will be useful. Even swscale is dynamic_input in ffmpeg 7.1+, so I (we) really hope to keep it working, too. Code: https://git.cinelerra-gg.org/git/?p=goodguy/cinelerra.git;a=blob;f=cinelerr…

1 0

add Vulkan hwaccel
by Andrew Randrianasulu 09 May '25

09 May '25

Now non-tonemapped 4k h264 hit 56 fps in window :)

4 7

hw filtering examples?
by Andrew Randrianasulu 08 May '25

08 May '25

I am trying to find out why our (cinelerra-gg) ffmpeg integration refuses to load filtergraph < and crashes and burns! > if I set hw decoding to any value (it works for sw decoding). So far I found this example (not accepted) on ffmpeg-devel, but I am still not sure how to apply ot for our case (we use av_buffersink_get_frame() ) https://ffmpeg.org/pipermail/ffmpeg-devel/2018-August/233555.html In general, I hope to get hw decoding (now via vulkan ) + libplacebo doing tonemapping purely on GPU *before* frames ingested into cingg for further (mostly software/host) manipulation, display and encode. But I guess for this I need to pass around hw_device_context created for decoder for this media/input file? (our filtering options are either global or per-file) filter_graph->filters[i]->hw_device_ctx = av_buffer_ref(hw_device_ctx); Paul, your lavfi-preview does not have hw filters previews yet, or I read sources too diagonally?

1 0

I tried to add AVC-Intra 100 output profiles
by Andrew Randrianasulu 08 May '25

08 May '25

But not sure if I did this correctly. https://en.wikipedia.org/wiki/AVC-Intra says for AVC-Intra 100: AVC-Intra 100: nominally 100 Mbit/s, size of each frame is fixed CAVLC entropy coding only. All formats are High 4:2:2 Intra Profile, Level 4.1 4:2:2 chrominance sampling frames are not scaled and yeah, this French-language pdf actually says the same: https://web.archive.org/web/20110720215759/http://www.ficam.fr/upload/docum… 50M 100M Standard MPEG-4 part10 AVC/H.264 Profile High 10 Intra High 4:2:2 Intra Level Level 3.2/4.0 Level 4.1 Resolution 1440x1080 / 960x720 1920x1080 / 1280x720 Sampling 4:2:0 4:2:2 Bit rate 54Mbps 111Mbps Block size Y: 8x8, C: 4x4 Intra Prediction Y: 9mode, C: 4mode MBAFF Yes De-block filter No Slice/frame 10 Entropy coding CABAC CAVLC so, I looked up ffmpeg cmd line https://trac.ffmpeg.org/ticket/3597 ffmpeg -v info -i /mnt-data/backup4/vol0/export/CUHK\ 2014-1/V017b.mov -vcodec libx264 -intra -pix_fmt yuv422p10le -vb 100M -x264opts avcintra-class=100 -x264opts colorprim=bt709 -x264opts transfer=bt709 -x264opts colormatrix=bt709 -threads 4 -acodec copy V017b-ffmpeg-git-avcintra100.mov Huh, said I and entered those params in opts file, actually in two files (mp4 and mov containers) mov libx264 cin_pix_fmt=yuv422p10le flags -global_header keyint_min=0 x264-params=keyint=0:colorprim=bt709:transfer=bt709:colormatrix=bt709 avcintra-class=100 bufsize=100000000 level=4.1 mp4 libx264 cin_pix_fmt=yuv422p10le flags -global_header keyint_min=0 x264-params=keyint=0:colorprim=bt709:transfer=bt709:colormatrix=bt709 avcintra-class=100 bufsize=100000000 level=4.1 both for progressive content, for interlace you must add some more flags: https://lists.ffmpeg.org/pipermail/ffmpeg-user/2017-January/035049.html -flags +ildct+ilme -x264opts interlaced=1 Also, there is still lack of (GUI) user notification if file writing failed due to NO SPACE on device :} FFStream::write_packet: write packet failed. file:/dev/shm/avci_new.mp4 err: На устройстве не осталось свободного места FFStream::encode_frame: encode failed. file: /dev/shm/avci_new.mp4 err: На устройстве не осталось свободного места FFStream::flush failed :file:/dev/shm/avci_new.mp4 err: Операция не позволена Render::render_single: Session finished. ** rendered 273 frames in 85.585 secs, 3.190 fps Render::render_single: Session finished. ** rendered 273 frames in 85.485 secs, 3.194 fps Render::render_single: Session finished. ** rendered 273 frames in 82.176 secs, 3.322 fps Profile sort of assumes you set project to some supported resolution, framerate, etc, otherwise libx264 will fail with console error message..... I found some talk about AVC-Ultra, there even was patch for x264, but it was not merged: https://mailman.videolan.org/pipermail/x264-devel/2015-September/011412.html Also, I think sound must be uncompressed, but I'm not sure.

2 5

vaapi vs vdpau vs vulkan hwaccels
by Andrew Randrianasulu 07 May '25

07 May '25

I noticed that for me OpenGL renderer string: AMD Radeon RX 550 / 550 Series (radeonsi, polaris12, ACO, DRM 3.61, 6.12.26-x64) OpenGL core profile version string: 4.6 (Core Profile) Mesa 25.2.0-devel (git-4f07092bdb) OpenGL core profile shading language version string: 4.60 hwaccel vdpau was FASTER in cingg, and even more reliable For 1080p60 h264 I hit 120 fps in default window on 1440x900 screen, vo x11 for 4k60 fps HDR I hit 30 fps in window, 25 fullscreen! Vaapi was like 15 fps in window max. So I benched them all bash-5.1$ ~/bin/ffmpeg8-vk -hwaccel vaapi -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -c:v rawvideo -f nut /dev/null ffmpeg version N-118190-g8bb682d454 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 11.2.0 (GCC) configuration: --enable-opencl --disable-debug --enable-libx265 --enable-libx264 --enable-gpl --enable-libplacebo --enable-vulkan --enable-libshaderc --enable-libzimg --enable-libaom --enable-libdav1d --enable-libsoxr --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gnutls --enable-libass --enable-libbluray --enable-libcdio --enable-frei0r --enable-libgsm --enable-openal --enable-libopus --enable-librtmp --enable-libsnappy --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp libavutil 60. 2.100 / 60. 2.100 libavcodec 62. 0.101 / 62. 0.101 libavformat 62. 0.100 / 62. 0.100 libavdevice 62. 0.100 / 62. 0.100 libavfilter 11. 0.100 / 11. 0.100 libswscale 9. 0.100 / 9. 0.100 libswresample 6. 0.100 / 6. 0.100 libpostproc 59. 1.100 / 59. 1.100 [aist#0:1/pcm_s16le @ 0xb437e80] Guessed Channel Layout: stereo Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/guest/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov': Metadata: major_brand : qt minor_version : 0 compatible_brands: qt creation_time : 2020-12-18T22:20:29.000000Z com.apple.quicktime.creationdate: 2020-12-18T17:20:29-0500 com.apple.quicktime.location.ISO6709: +33.4233-084.5802/ Duration: 00:00:19.16, start: 0.000000, bitrate: 69140 kb/s Stream #0:0[0x1](und): Video: hevc (Main 10) (hvc1 / 0x31637668), yuv420p10le(pc, bt2020nc/bt2020/smpte2084), 3840x2160, 64166 kb/s, 59.92 fps, 59.94 tbr, 600 tbn (default) Metadata: creation_time : 2020-12-18T22:20:29.000000Z handler_name : Core Media Video vendor_id : [0][0][0][0] encoder : HEVC Stream #0:1[0x2](und): Audio: pcm_s16le (lpcm / 0x6D63706C), 48000 Hz, stereo, s16, 1536 kb/s (default) Metadata: creation_time : 2020-12-18T22:20:29.000000Z handler_name : Core Media Audio vendor_id : [0][0][0][0] File '/dev/null' already exists. Overwrite? [y/N] y Stream mapping: Stream #0:0 -> #0:0 (hevc (native) -> rawvideo (native)) Stream #0:1 -> #0:1 (pcm_s16le (native) -> vorbis (libvorbis)) Press [q] to stop, [?] for help Output #0, nut, to '/dev/null': Metadata: major_brand : qt minor_version : 0 compatible_brands: qt com.apple.quicktime.location.ISO6709: +33.4233-084.5802/ com.apple.quicktime.creationdate: 2020-12-18T17:20:29-0500 encoder : Lavf62.0.100 Stream #0:0: Video: rawvideo (RGB[15] / 0xF424752), p010le(pc, bt2020nc/bt2020/smpte2084, progressive), 3840x2160, q=2-31, 7457502 kb/s, 59.94 fps, 60k tbn (default) Metadata: encoder : Lavc62.0.101 rawvideo creation_time : 2020-12-18T22:20:29.000000Z X-Language : und handler_name : Core Media Video vendor_id : [0][0][0][0] Stream #0:1: Audio: vorbis (oV[0][0] / 0x566F), 48000 Hz, stereo, fltp (default) Metadata: encoder : Lavc62.0.101 libvorbis creation_time : 2020-12-18T22:20:29.000000Z X-Language : und handler_name : Core Media Audio vendor_id : [0][0][0][0] [out#0/nut @ 0xb436240] video:27896400KiB audio:232KiB subtitle:0KiB other streams:0KiB global headers:4KiB muxing overhead: 0.000255% frame= 1148 fps= 12 q=-0.0 Lsize=27896703KiB time=00:00:19.16 bitrate=11921748.9kbits/s speed= 0.2x VAAPI = 12 fps. bash-5.1$ ~/bin/ffmpeg8-vk -hwaccel vdpau -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -c:v rawvideo -f nut /dev/null ffmpeg version N-118190-g8bb682d454 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 11.2.0 (GCC) configuration: --enable-opencl --disable-debug --enable-libx265 --enable-libx264 --enable-gpl --enable-libplacebo --enable-vulkan --enable-libshaderc --enable-libzimg --enable-libaom --enable-libdav1d --enable-libsoxr --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gnutls --enable-libass --enable-libbluray --enable-libcdio --enable-frei0r --enable-libgsm --enable-openal --enable-libopus --enable-librtmp --enable-libsnappy --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp libavutil 60. 2.100 / 60. 2.100 libavcodec 62. 0.101 / 62. 0.101 libavformat 62. 0.100 / 62. 0.100 libavdevice 62. 0.100 / 62. 0.100 libavfilter 11. 0.100 / 11. 0.100 libswscale 9. 0.100 / 9. 0.100 libswresample 6. 0.100 / 6. 0.100 libpostproc 59. 1.100 / 59. 1.100 [aist#0:1/pcm_s16le @ 0xc259e80] Guessed Channel Layout: stereo Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/guest/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov': Metadata: major_brand : qt minor_version : 0 compatible_brands: qt creation_time : 2020-12-18T22:20:29.000000Z com.apple.quicktime.creationdate: 2020-12-18T17:20:29-0500 com.apple.quicktime.location.ISO6709: +33.4233-084.5802/ Duration: 00:00:19.16, start: 0.000000, bitrate: 69140 kb/s Stream #0:0[0x1](und): Video: hevc (Main 10) (hvc1 / 0x31637668), yuv420p10le(pc, bt2020nc/bt2020/smpte2084), 3840x2160, 64166 kb/s, 59.92 fps, 59.94 tbr, 600 tbn (default) Metadata: creation_time : 2020-12-18T22:20:29.000000Z handler_name : Core Media Video vendor_id : [0][0][0][0] encoder : HEVC Stream #0:1[0x2](und): Audio: pcm_s16le (lpcm / 0x6D63706C), 48000 Hz, stereo, s16, 1536 kb/s (default) Metadata: creation_time : 2020-12-18T22:20:29.000000Z handler_name : Core Media Audio vendor_id : [0][0][0][0] File '/dev/null' already exists. Overwrite? [y/N] y Stream mapping: Stream #0:0 -> #0:0 (hevc (native) -> rawvideo (native)) Stream #0:1 -> #0:1 (pcm_s16le (native) -> vorbis (libvorbis)) Press [q] to stop, [?] for help Output #0, nut, to '/dev/null': Metadata: major_brand : qt minor_version : 0 compatible_brands: qt com.apple.quicktime.location.ISO6709: +33.4233-084.5802/ com.apple.quicktime.creationdate: 2020-12-18T17:20:29-0500 encoder : Lavf62.0.100 Stream #0:0: Video: rawvideo (RGB[15] / 0xF424752), p016le(pc, bt2020nc/bt2020/smpte2084, progressive), 3840x2160, q=2-31, 11932003 kb/s, 59.94 fps, 60k tbn (default) Metadata: encoder : Lavc62.0.101 rawvideo creation_time : 2020-12-18T22:20:29.000000Z X-Language : und handler_name : Core Media Video vendor_id : [0][0][0][0] Stream #0:1: Audio: vorbis (oV[0][0] / 0x566F), 48000 Hz, stereo, fltp (default) Metadata: encoder : Lavc62.0.101 libvorbis creation_time : 2020-12-18T22:20:29.000000Z X-Language : und handler_name : Core Media Audio vendor_id : [0][0][0][0] [out#0/nut @ 0xc258240] video:27896400KiB audio:232KiB subtitle:0KiB other streams:0KiB global headers:4KiB muxing overhead: 0.000255% frame= 1148 fps= 17 q=-0.0 Lsize=27896703KiB time=00:00:19.16 bitrate=11921748.9kbits/s speed=0.283x VDPAU = 17 fps bash-5.1$ RADV_PERFTEST=video_decode ~/bin/ffmpeg8-vk -hwaccel vulkan -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -c:v rawvideo -f nut /dev/null ffmpeg version N-118190-g8bb682d454 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 11.2.0 (GCC) configuration: --enable-opencl --disable-debug --enable-libx265 --enable-libx264 --enable-gpl --enable-libplacebo --enable-vulkan --enable-libshaderc --enable-libzimg --enable-libaom --enable-libdav1d --enable-libsoxr --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gnutls --enable-libass --enable-libbluray --enable-libcdio --enable-frei0r --enable-libgsm --enable-openal --enable-libopus --enable-librtmp --enable-libsnappy --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp libavutil 60. 2.100 / 60. 2.100 libavcodec 62. 0.101 / 62. 0.101 libavformat 62. 0.100 / 62. 0.100 libavdevice 62. 0.100 / 62. 0.100 libavfilter 11. 0.100 / 11. 0.100 libswscale 9. 0.100 / 9. 0.100 libswresample 6. 0.100 / 6. 0.100 libpostproc 59. 1.100 / 59. 1.100 [aist#0:1/pcm_s16le @ 0xb4f6e80] Guessed Channel Layout: stereo Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/guest/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov': Metadata: major_brand : qt minor_version : 0 compatible_brands: qt creation_time : 2020-12-18T22:20:29.000000Z com.apple.quicktime.creationdate: 2020-12-18T17:20:29-0500 com.apple.quicktime.location.ISO6709: +33.4233-084.5802/ Duration: 00:00:19.16, start: 0.000000, bitrate: 69140 kb/s Stream #0:0[0x1](und): Video: hevc (Main 10) (hvc1 / 0x31637668), yuv420p10le(pc, bt2020nc/bt2020/smpte2084), 3840x2160, 64166 kb/s, 59.92 fps, 59.94 tbr, 600 tbn (default) Metadata: creation_time : 2020-12-18T22:20:29.000000Z handler_name : Core Media Video vendor_id : [0][0][0][0] encoder : HEVC Stream #0:1[0x2](und): Audio: pcm_s16le (lpcm / 0x6D63706C), 48000 Hz, stereo, s16, 1536 kb/s (default) Metadata: creation_time : 2020-12-18T22:20:29.000000Z handler_name : Core Media Audio vendor_id : [0][0][0][0] File '/dev/null' already exists. Overwrite? [y/N] y Stream mapping: Stream #0:0 -> #0:0 (hevc (native) -> rawvideo (native)) Stream #0:1 -> #0:1 (pcm_s16le (native) -> vorbis (libvorbis)) Press [q] to stop, [?] for help Output #0, nut, to '/dev/null': Metadata: major_brand : qt minor_version : 0 compatible_brands: qt com.apple.quicktime.location.ISO6709: +33.4233-084.5802/ com.apple.quicktime.creationdate: 2020-12-18T17:20:29-0500 encoder : Lavf62.0.100 Stream #0:0: Video: rawvideo (RGB[15] / 0xF424752), p010le(pc, bt2020nc/bt2020/smpte2084, progressive), 3840x2160, q=2-31, 7457502 kb/s, 59.94 fps, 60k tbn (default) Metadata: encoder : Lavc62.0.101 rawvideo creation_time : 2020-12-18T22:20:29.000000Z X-Language : und handler_name : Core Media Video vendor_id : [0][0][0][0] Stream #0:1: Audio: vorbis (oV[0][0] / 0x566F), 48000 Hz, stereo, fltp (default) Metadata: encoder : Lavc62.0.101 libvorbis creation_time : 2020-12-18T22:20:29.000000Z X-Language : und handler_name : Core Media Audio vendor_id : [0][0][0][0] [out#0/nut @ 0xb4f5240] video:27896400KiB audio:232KiB subtitle:0KiB other streams:0KiB global headers:4KiB muxing overhead: 0.000255% frame= 1148 fps= 35 q=-0.0 Lsize=27896703KiB time=00:00:19.16 bitrate=11921748.9kbits/s speed=0.579x VULKAN = 35 fps! So, after THIS result I *definitely* will look into Vulkan hwaccel! :)

3 2

HDMI video streams to lossless compressed FFV1.MKV
by Terje J. Hanssen 07 May '25

07 May '25

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?

2 9