July 2025 - ffmpeg-user - lists.ffmpeg.org

Chroma subsampling formats
by Mark Filipak 22 Jul '25

22 Jul '25

Are these correct? Or, is there some official reference I can consult? --Mark. KEY: ¤ —— Element exists in the field and is sampled • —— Element exists in the field but is not sampled —— (blank) Element doesn't exist in the field Reference: https://en.wikipedia.org/wiki/Chroma_subsampling Y element, pixels 0..3 / Cb element, pixels 0..3 / / Cr element, pixels 0..3 / / / 4:4:4 ¤¤¤¤ ¤¤¤¤ ¤¤¤¤ —— lines in field 0 ¤¤¤¤ ¤¤¤¤ ¤¤¤¤ —— lines in field 1 4:4:2 ¤¤¤¤ ¤¤¤¤ ¤¤¤¤ ¤¤¤¤ ¤•¤• ¤•¤• 4:4:2 ¤¤¤¤ ¤¤¤¤ ¤¤¤¤ // JPEG variant according to the reference ¤¤¤¤ ¤¤¤¤ 4:4:1 ¤¤¤¤ ¤¤¤¤ ¤¤¤¤ ¤¤¤¤ ¤••• ¤••• 4:4:0 ¤¤¤¤ ¤¤¤¤ ¤¤¤¤ ¤¤¤¤ 4:2:2 ¤¤¤¤ ¤•¤• ¤•¤• ¤¤¤¤ ¤•¤• ¤•¤• 4:2:1 ¤¤¤¤ ¤•¤• ¤•¤• ¤¤¤¤ ¤••• ¤••• 4:2:1 ¤¤¤¤ ¤•¤• ¤•¤• // JPEG variant according to the reference ¤¤¤¤ ¤••• 4:2:0 ¤¤¤¤ ¤•¤• ¤•¤• ¤¤¤¤ 4:1:1 ¤¤¤¤ ¤••• ¤••• ¤¤¤¤ ¤••• ¤••• 4:1:0 ¤¤¤¤ ¤••• ¤••• ¤¤¤¤ 4:0:0 ¤¤¤¤ // My conjecture ¤¤¤¤ 3:1:1 ¤¤¤ ¤•• ¤•• // Sony variant according to the reference ¤¤¤ ¤•• ¤••

4 26

Extended MOV Muxer Support
by Glen Edwards 19 Jul '25

19 Jul '25

Dear FFmpeg developers, I would Request to Add Support for Muxing VP8, VP9, AV1, RealVideo 6.0 and Other Modern Video Codecs and TTA, WavPack, FLAC, Opus and Other Modern Audio Codecs into the MOV Muxer. Thanks, Glen Edwards

1 0

[Issues with config ffmpeg]
by Pragya Vu 14 Jul '25

14 Jul '25

Hi, I am having trouble with config the ffmpeg when trying to install it. I tried to reinstall gcc, do whatever I found on internet but it just don't work. It said that I can send an email with the config.log file to get help. Can you help me to check the config.log file to see what can be the reason, what can I do in this situation? My ./config command: ./configure --disable-doc --disable-debug --enable-network --disable-lzma \ --enable-pic --disable-vulkan --disable-v4l2-m2m \ --disable-decoder=truemotion1 --enable-shared --disable-static \ --disable-zlib --disable-iconv The error: [image: image.png] Config.log: (I attach with this email) Best regard, Vu Hoang Ngyuyen

2 1

24p-to-25i-to-30i double-telecine
by Mark Filipak 13 Jul '25

13 Jul '25

The object of this presentation is to recover 24p from a source that has been 24p-to-25i-to-30i double-telecined. Parts 1..3 are the appetizers. Part 4 begins the main course. Part 1: A review of the combing patterns of the various 24-to-30 telecines to give readers the idea of what is to come in Parts 4..6. input: [A+a][B+b][C+c][D+d] output: below 'p' - progressive, 'c' - combed For 2:3:2:3 pull-down: [A+a][B+b][B+c][C+d][D+d] p p c c p For 3:2:3:2 pull-down: [A+a][A+b][B+c][C+c][D+d] p c c p p For 2:2:3:3 pull-down: [A+a][B+b][C+c][C+d][D+d] p p p c p For 2:3:3:2 pull-down: [A+a][B+b][B+c][C+c][D+d] p p c p p For 3:3:2:2 pull-down: [A+a][A+b][B+b][C+c][D+d] p c p p p For 3:2:2:3 pull-down: [A+a][A+b][B+c][C+d][D+d] p c c c p Part 2: A technique for 30i-to-24p detelecining based on the patterns. void function 30i-to-24p() { switch getpattern(separatefields(get5frames(N))) { case ppccp: // [A+a][B+b][B+c][C+d][D+d] 8fieldframes = shuffleframes(0 1 2 3 -1 5 4 7 6 -1); break; case pccpp: // [A+a][A+b][B+c][C+c][D+d] 8fieldframes = shuffleframes(0 1 -1 3 2 5 4 -1 6 7); break; case pppcp: // [A+a][B+b][C+c][C+d][D+d] 8fieldframes = shuffleframes(0 1 2 3 4 5 -1 7 6 -1); break; case ppcpp: // [A+a][B+b][B+c][C+c][D+d] 8fieldframes = shuffleframes(0 1 2 3 -1 5 4 -1 6 7); break; case pcppp: // [A+a][A+b][B+b][C+c][D+d] 8fieldframes = shuffleframes(0 1 -1 3 2 -1 4 5 6 7); break; case pcccp: // [A+a][A+b][B+c][C+d][D+d] 8fieldframes = shuffleframes(0 1 -1 3 2 5 4 7 6 -1); } put4frames(weave(8fieldframes)); N+=5; } Kindly don't ridicule me too much. I know I'm literally passing whole frames. I know that 'N' should instead be a pointer into an array of frame-buffer pointers. I know that separatefields() and weave() probably doesn't exist by those names and that they undoubtedly pass pointers, not frames & fields. I know I haven't defined functions getpattern() and put4frames() and variable 8fieldframes. Sorry, I don't know 'C' and I don't know how FFmpeg is organized. Part 3: The point I'm trying to make is that something like this must already exist, eh? And if it does, and if it spans all 6 patterns, then it has 100% coverage because 6 patterns is all there can be and because each pattern is unique. This ends the appetizer and begins the main course. Part 4: It appears to me that BBC, for one, has made 30i videos (so-called "NTSC") from existing 25i videos (so-called "PAL") that were initially shot as 24p. Based on comb sequences, it appears that the 24p, first, is 24-to-25 (euro) telecined, then, second, telecined a second time via 5-to-6 telecine. That produces 30i that is a mix of progressive frames, 41.[6..] ns combs, and 83.[3..] ns combs. Unfortunately for the NTSC folks, such double-telecined DVDs do exist; I've seen them and they're god-awful, especially when the "PAL" was cut and spliced prior to the second telecine and also when the "NTSC" was secondarily cut and spliced in the process of assembling an "NTSC" master. The BBC, for one, appears to be not very thoughtful or careful doing that -- the "NTSC" version of "I, Claudius" comes immediately to mind. I'm calling the 2-step process "24p-to-25i-to-30i double-telecine". Note that the topic here is only 30i that has previously been 24p-to-25i telecined, not 30i made from so-called "PAL speed-up" or 30i made from native PAL. Part 5: There are 25 'flavors' of 24-to-25 telecine. Each 'flavor' is further 'spiced' by the 6 varieties of 5-to-6 telecine above. That means there are 150 combinations of 'spiced flavors' in 24p-to-25i-to-30i double-telecine. The detelecine (back to 24p) of every 'spiced flavor' based solely on 150 comb patterns is quite possible. Part 6: I could write a Java program to find all 150 comb patterns plus all 150 shuffleframes recipes in order to populate a 150 case switch-case, but I need to know first whether there's any appetite for this meal. Is there? It would mean also writing a getpattern() that automates the whole process, or at least a getpattern() that would report the pattern so that users could then manually select and submit the appropriate shuffleframes as a CLI command. Of course, the manual approach would break when it encounters a 'bad' cut-n-splice -- meaning: Users would need to know where the breaks are so that they can make and process segments that they splice together, later. Regards, Mark. PS: I'm submitting this here because joining ffmpeg-devel has been unsuccessful.

1 0

Re: [FFmpeg-user] Convert iPhone MOV to Android MP4
by Richard Duran 12 Jul '25

12 Jul '25

1 0

out_time_us wrong or strangely inaccurate
by thefoss＠icybiz.com 07 Jul '25

07 Jul '25

I try to get the duration of a webm video file. During testing I encountered some to me very strange output of ffmpeg. I use this line: ffmpeg -i "./recordedVideo.webm" -progress - -f null -stats_period 0.00015 - With this line I get nearly every frame shown with frame number and out_time_us on stdout. The video file seems to have 40 frames according to ffmpeg. Now the strange things start right with the first frame. The first frame is not being shown as to start at "out_time_us=0000000", as one would expect, but at "out_time_us=1020000". This is more than a full second after zero. Then it seems to progress ok through the frames, taking about 60000 microseconds for each frame until it hits frame 26 of 40 with indication "out_time_us=2700000" Then strangely all the rest of the 14 frames also show "out_time_us=2700000". Is this a bug in ffmpeg? Why would this be? Am I missing something here? How do I get the exact duration of a video file? Best would be of course if every frame is marked with its correct timestamp. Please help! Here is the full output: ========= ffmpeg version 5.1.6-0+deb12u1 Copyright (c) 2000-2024 the FFmpeg developers built with gcc 12 (Debian 12.2.0-14) configuration: --prefix=/usr --extra-version=0+deb12u1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-libjxl --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared libavutil 57. 28.100 / 57. 28.100 libavcodec 59. 37.100 / 59. 37.100 libavformat 59. 27.100 / 59. 27.100 libavdevice 59. 7.100 / 59. 7.100 libavfilter 8. 44.100 / 8. 44.100 libswscale 6. 7.100 / 6. 7.100 libswresample 4. 7.100 / 4. 7.100 libpostproc 56. 6.100 / 56. 6.100 ffmpeg stats and -progress period set to 0.00015. Input #0, matroska,webm, from './recordedVideo.webm': Metadata: encoder : Chrome Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0(eng): Audio: opus, 48000 Hz, mono, fltp (default) Stream #0:1(eng): Video: vp8, yuv420p(progressive), 640x480, SAR 1:1 DAR 4:3, 250 tbr, 1k tbn (default) Metadata: alpha_mode : 1 Stream mapping: Stream #0:1 -> #0:0 (vp8 (native) -> wrapped_avframe (native)) Stream #0:0 -> #0:1 (opus (native) -> pcm_s16le (native)) Press [q] to stop, [?] for help Output #0, null, to 'pipe:': Metadata: encoder : Lavf59.27.100 Stream #0:0(eng): Video: wrapped_avframe, yuv420p(tv, bt470bg/unknown/unknown, progressive), 640x480 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 250 fps, 250 tbn (default) Metadata: alpha_mode : 1 encoder : Lavc59.37.100 wrapped_avframe Stream #0:1(eng): Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s (default) Metadata: encoder : Lavc59.37.100 pcm_s16le frame=1 1 fps=0.0 q=-0.0 size=N/A time=00:00:01.02 bitrate=N/A speed= 167x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1020000 out_time_ms=1020000 out_time=00:00:01.020000 dup_frames=0 drop_frames=0 speed= 167x progress=continue frame=1 1 fps=0.0 q=-0.0 size=N/A time=00:00:01.08 bitrate=N/A speed= 139x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1080000 out_time_ms=1080000 out_time=00:00:01.080000 dup_frames=0 drop_frames=0 speed= 139x progress=continue frame=1 1 fps=0.0 q=-0.0 size=N/A time=00:00:01.14 bitrate=N/A speed= 144x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1140000 out_time_ms=1140000 out_time=00:00:01.140000 dup_frames=0 drop_frames=0 speed= 144x progress=continue frame=3 3 fps=0.0 q=-0.0 size=N/A time=00:00:01.20 bitrate=N/A speed= 146x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1200000 out_time_ms=1200000 out_time=00:00:01.200000 dup_frames=0 drop_frames=0 speed= 146x progress=continue frame=4 4 fps=0.0 q=-0.0 size=N/A time=00:00:01.26 bitrate=N/A speed= 148x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1260000 out_time_ms=1260000 out_time=00:00:01.260000 dup_frames=0 drop_frames=0 speed= 148x progress=continue frame=4 4 fps=0.0 q=-0.0 size=N/A time=00:00:01.32 bitrate=N/A speed= 152x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1320000 out_time_ms=1320000 out_time=00:00:01.320000 dup_frames=0 drop_frames=0 speed= 152x progress=continue frame=5 5 fps=0.0 q=-0.0 size=N/A time=00:00:01.38 bitrate=N/A speed= 156x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1380000 out_time_ms=1380000 out_time=00:00:01.380000 dup_frames=0 drop_frames=0 speed= 156x progress=continue frame=6 6 fps=0.0 q=-0.0 size=N/A time=00:00:01.44 bitrate=N/A speed= 160x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1440000 out_time_ms=1440000 out_time=00:00:01.440000 dup_frames=0 drop_frames=0 speed= 160x progress=continue frame=8 8 fps=0.0 q=-0.0 size=N/A time=00:00:01.50 bitrate=N/A speed= 162x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1500000 out_time_ms=1500000 out_time=00:00:01.500000 dup_frames=0 drop_frames=0 speed= 162x progress=continue frame=9 9 fps=0.0 q=-0.0 size=N/A time=00:00:01.56 bitrate=N/A speed= 166x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1560000 out_time_ms=1560000 out_time=00:00:01.560000 dup_frames=0 drop_frames=0 speed= 166x progress=continue frame=10 10 fps=0.0 q=-0.0 size=N/A time=00:00:01.62 bitrate=N/A speed= 169x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1620000 out_time_ms=1620000 out_time=00:00:01.620000 dup_frames=0 drop_frames=0 speed= 169x progress=continue frame=10 10 fps=0.0 q=-0.0 size=N/A time=00:00:01.74 bitrate=N/A speed= 178x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1740000 out_time_ms=1740000 out_time=00:00:01.740000 dup_frames=0 drop_frames=0 speed= 178x progress=continue frame=11 11 fps=0.0 q=-0.0 size=N/A time=00:00:01.74 bitrate=N/A speed= 174x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1740000 out_time_ms=1740000 out_time=00:00:01.740000 dup_frames=0 drop_frames=0 speed= 174x progress=continue frame=12 12 fps=0.0 q=-0.0 size=N/A time=00:00:01.80 bitrate=N/A speed= 176x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1800000 out_time_ms=1800000 out_time=00:00:01.800000 dup_frames=0 drop_frames=0 speed= 176x progress=continue frame=13 13 fps=0.0 q=-0.0 size=N/A time=00:00:01.86 bitrate=N/A speed= 177x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1860000 out_time_ms=1860000 out_time=00:00:01.860000 dup_frames=0 drop_frames=0 speed= 177x progress=continue frame=14 14 fps=0.0 q=-0.0 size=N/A time=00:00:01.92 bitrate=N/A speed= 179x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1920000 out_time_ms=1920000 out_time=00:00:01.920000 dup_frames=0 drop_frames=0 speed= 179x progress=continue frame=15 15 fps=0.0 q=-0.0 size=N/A time=00:00:01.98 bitrate=N/A speed= 180x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=1980000 out_time_ms=1980000 out_time=00:00:01.980000 dup_frames=0 drop_frames=0 speed= 180x progress=continue frame=16 16 fps=0.0 q=-0.0 size=N/A time=00:00:02.04 bitrate=N/A speed= 182x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2040000 out_time_ms=2040000 out_time=00:00:02.040000 dup_frames=0 drop_frames=0 speed= 182x progress=continue frame=17 17 fps=0.0 q=-0.0 size=N/A time=00:00:02.10 bitrate=N/A speed= 183x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2100000 out_time_ms=2100000 out_time=00:00:02.100000 dup_frames=0 drop_frames=0 speed= 183x progress=continue frame=18 18 fps=0.0 q=-0.0 size=N/A time=00:00:02.16 bitrate=N/A speed= 184x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2160000 out_time_ms=2160000 out_time=00:00:02.160000 dup_frames=0 drop_frames=0 speed= 184x progress=continue frame=19 19 fps=0.0 q=-0.0 size=N/A time=00:00:02.22 bitrate=N/A speed= 185x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2220000 out_time_ms=2220000 out_time=00:00:02.220000 dup_frames=0 drop_frames=0 speed= 185x progress=continue frame=19 19 fps=0.0 q=-0.0 size=N/A time=00:00:02.34 bitrate=N/A speed= 192x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2340000 out_time_ms=2340000 out_time=00:00:02.340000 dup_frames=0 drop_frames=0 speed= 192x progress=continue frame=20 20 fps=0.0 q=-0.0 size=N/A time=00:00:02.34 bitrate=N/A speed= 188x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2340000 out_time_ms=2340000 out_time=00:00:02.340000 dup_frames=0 drop_frames=0 speed= 188x progress=continue frame=21 21 fps=0.0 q=-0.0 size=N/A time=00:00:02.40 bitrate=N/A speed= 190x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2400000 out_time_ms=2400000 out_time=00:00:02.400000 dup_frames=0 drop_frames=0 speed= 190x progress=continue frame=22 22 fps=0.0 q=-0.0 size=N/A time=00:00:02.46 bitrate=N/A speed= 192x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2460000 out_time_ms=2460000 out_time=00:00:02.460000 dup_frames=0 drop_frames=0 speed= 192x progress=continue frame=23 23 fps=0.0 q=-0.0 size=N/A time=00:00:02.52 bitrate=N/A speed= 193x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2520000 out_time_ms=2520000 out_time=00:00:02.520000 dup_frames=0 drop_frames=0 speed= 193x progress=continue frame=24 24 fps=0.0 q=-0.0 size=N/A time=00:00:02.58 bitrate=N/A speed= 194x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2580000 out_time_ms=2580000 out_time=00:00:02.580000 dup_frames=0 drop_frames=0 speed= 194x progress=continue frame=25 25 fps=0.0 q=-0.0 size=N/A time=00:00:02.64 bitrate=N/A speed= 195x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2640000 out_time_ms=2640000 out_time=00:00:02.640000 dup_frames=0 drop_frames=0 speed= 195x progress=continue frame=26 26 fps=0.0 q=-0.0 size=N/A time=00:00:02.70 bitrate=N/A speed= 197x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2700000 out_time_ms=2700000 out_time=00:00:02.700000 dup_frames=0 drop_frames=0 speed= 197x progress=continue frame=29 29 fps=0.0 q=-0.0 size=N/A time=00:00:02.70 bitrate=N/A speed= 193x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2700000 out_time_ms=2700000 out_time=00:00:02.700000 dup_frames=0 drop_frames=0 speed= 193x progress=continue frame=30 30 fps=0.0 q=-0.0 size=N/A time=00:00:02.70 bitrate=N/A speed= 191x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2700000 out_time_ms=2700000 out_time=00:00:02.700000 dup_frames=0 drop_frames=0 speed= 191x progress=continue frame=31 31 fps=0.0 q=-0.0 size=N/A time=00:00:02.70 bitrate=N/A speed= 183x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2700000 out_time_ms=2700000 out_time=00:00:02.700000 dup_frames=0 drop_frames=0 speed= 183x progress=continue frame=33 33 fps=0.0 q=-0.0 size=N/A time=00:00:02.70 bitrate=N/A speed= 179x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2700000 out_time_ms=2700000 out_time=00:00:02.700000 dup_frames=0 drop_frames=0 speed= 179x progress=continue frame=34 34 fps=0.0 q=-0.0 size=N/A time=00:00:02.70 bitrate=N/A speed= 175x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2700000 out_time_ms=2700000 out_time=00:00:02.700000 dup_frames=0 drop_frames=0 speed= 175x progress=continue frame=35 35 fps=0.0 q=-0.0 size=N/A time=00:00:02.70 bitrate=N/A speed= 173x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2700000 out_time_ms=2700000 out_time=00:00:02.700000 dup_frames=0 drop_frames=0 speed= 173x progress=continue frame=37 37 fps=0.0 q=-0.0 size=N/A time=00:00:02.70 bitrate=N/A speed= 171x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2700000 out_time_ms=2700000 out_time=00:00:02.700000 dup_frames=0 drop_frames=0 speed= 171x progress=continue frame=38 38 fps=0.0 q=-0.0 size=N/A time=00:00:02.70 bitrate=N/A speed= 169x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2700000 out_time_ms=2700000 out_time=00:00:02.700000 dup_frames=0 drop_frames=0 speed= 169x progress=continue frame=40 40 fps=0.0 q=-0.0 size=N/A time=00:00:02.70 bitrate=N/A speed= 167x fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2700000 out_time_ms=2700000 out_time=00:00:02.700000 dup_frames=0 drop_frames=0 speed= 167x progress=continue frame= 40 fps=0.0 q=-0.0 Lsize=N/A time=00:00:02.70 bitrate=N/A speed= 165x frame=40 fps=0.00 stream_0_0_q=-0.0 bitrate=N/A total_size=N/A out_time_us=2700000 out_time_ms=2700000 out_time=00:00:02.700000 dup_frames=0 drop_frames=0 speed= 165x progress=end video:18kB audio:253kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

3 3

Cleaning up codeline to grab and record HDV video using Firewire/libiec61883
by Terje J. Hanssen 01 Jul '25

01 Jul '25

My Sony HDR-FX7E HDV camcorder is connected via Firewire (Sony i.Link) to record standard 1080i50 HDV video, 1440x1080, 25 Mbps (.M2T). I hope to get help to cleanup the codelines to solve the following issues: 1) Testing first the FFmpeg Devices Documentation's codeline to "Grab and record the input of a FireWire DV/HDV device, using a packet buffer of 100000 packets if the source is HDV" https://www.ffmpeg.org/ffmpeg-devices.html#Examples-3 results in a highly compressed video with bitrate only 1106 kbits/s a) Why so when the standard .M2T is 25 Mbps? b) There are also warnings regarding streams 0, 3, 4 ? c) Consider increasing the value for the 'analyzeduration', 'probesize'? ffmpeg -hide_banner -f iec61883 -i auto -dvbuffer 100000 out.mpg [mpeg2video @ 0x5570d56ba940] Invalid frame dimensions 0x0. Last message repeated 6 times [iec61883 @ 0x5570d569ca00] Could not find codec parameters for stream 0 (Unknown: none): unknown codec Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options [iec61883 @ 0x5570d569ca00] Could not find codec parameters for stream 3 (Unknown: none ([161][0][0][0] / 0x00A1)): unknown codec Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options [iec61883 @ 0x5570d569ca00] Could not find codec parameters for stream 4 (Unknown: none ([160][0][0][0] / 0x00A0)): unknown codec Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options Input #0, iec61883, from 'auto': Duration: N/A, start: 1775.229356, bitrate: 25384 kb/s Program 100 Stream #0:2: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709, top first), 1440x1080 [SAR 4:3 DAR 16:9], 25000 kb/s, 25 fps, 25 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 25000000/0/0 buffer size: 7340032 vbv_delay: N/A Stream #0:1: Audio: mp2 (mp3float) ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s Stream #0:4: Unknown: none ([160][0][0][0] / 0x00A0) Stream #0:3: Unknown: none ([161][0][0][0] / 0x00A1) No Program Stream #0:0: Unknown: none Stream mapping: Stream #0:2 -> #0:0 (mpeg2video (native) -> mpeg1video (native)) Stream #0:1 -> #0:1 (mp2 (native) -> mp2 (native)) Press [q] to stop, [?] for help [mpeg @ 0x5570d56e25c0] VBV buffer size not set, using default size of 230KB If you want the mpeg file to be compliant to some specification Like DVD, VCD or others, make sure you set the correct buffer size Output #0, mpeg, to 'out.mpg': Metadata: encoder : Lavf61.7.100 Stream #0:0: Video: mpeg1video, yuv420p(tv, bt709, top coded first (swapped)), 1440x1080 [SAR 4:3 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 90k tbn Metadata: encoder : Lavc61.19.101 mpeg1video Side data: cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s Metadata: encoder : Lavc61.19.101 mp2 [out#0/mpeg @ 0x5570d56ea0c0] video:1278KiB audio:688KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.773339% frame= 373 fps= 29 q=24.8 Lsize= 1982KiB time=00:00:14.67 bitrate=1106.2kbits/s dup=17 drop=0 speed=1.13x Exiting normally, received signal 2. =============== 2) a) Adding "-c copy" solves the output bitrate = input bitrate = 25 Mbps c) Trying to increase the value for the 'analyzeduration' (0) and 'probesize' are not successful? ffmpeg -loglevel debug -f iec61883 -analyzeduration 1 -probesize 10M -i auto -dvbuffer 100000 -c copy out6.m2t ffmpeg version 7.1.1 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 14 (SUSE Linux) configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include/ffmpeg --extra-cflags='-O2 -Wall -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -ffat-lto-objects -g' --optflags='-O2 -Wall -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -ffat-lto-objects -g' --disable-htmlpages --enable-pic --disable-stripping --enable-shared --disable-static --enable-gpl --enable-version3 --enable-libsmbclient --disable-openssl --enable-gnutls --enable-ladspa --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libdc1394 --enable-libdrm --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libjxl --enable-librist --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopenh264-dlopen --enable-libopus --enable-libpulse --enable-librav1e --enable-librubberband --enable-libsvtav1 --enable-libsoxr --enable-libspeex --enable-libssh --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lto --enable-lv2 --enable-libvpl --enable-vaapi --enable-vdpau --enable-version3 --enable-libfdk-aac-dlopen --enable-nonfree --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libx264 --enable-libx265 --enable-libxvid libavutil 59. 39.100 / 59. 39.100 libavcodec 61. 19.101 / 61. 19.101 libavformat 61. 7.100 / 61. 7.100 libavdevice 61. 3.100 / 61. 3.100 libavfilter 10. 4.100 / 10. 4.100 libswscale 8. 3.100 / 8. 3.100 libswresample 5. 3.100 / 5. 3.100 libpostproc 58. 3.100 / 58. 3.100 Splitting the commandline. Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'. Reading option '-f' ... matched as option 'f' (force container format (auto-detected otherwise)) with argument 'iec61883'. Reading option '-analyzeduration' ... matched as AVOption 'analyzeduration' with argument '1'. Reading option '-probesize' ... matched as AVOption 'probesize' with argument '10M'. Reading option '-i' ... matched as input url with argument 'auto'. Reading option '-dvbuffer' ... matched as AVOption 'dvbuffer' with argument '100000'. Reading option '-c' ... matched as option 'c' (select encoder/decoder ('copy' to copy stream without reencoding)) with argument 'copy'. Reading option 'out6.m2t' ... matched as output url. Finished splitting the commandline. Parsing a group of options: global . Applying option loglevel (set logging level) with argument debug. Successfully parsed a group of options. Parsing a group of options: input url auto. Applying option f (force container format (auto-detected otherwise)) with argument iec61883. Successfully parsed a group of options. Opening an input file: auto. [iec61883 @ 0x555754cd2a40] stream=1 stream_type=0 pid=810 prog_reg_desc= [iec61883 @ 0x555754cd2a40] stream=2 stream_type=0 pid=814 prog_reg_desc= [iec61883 @ 0x555754cd2a40] probing stream 2 pp:2500 [iec61883 @ 0x555754cd2a40] Probe with size=1152, packets=1 detected mp3 with score=1 [iec61883 @ 0x555754cd2a40] stream=1 stream_type=2 pid=810 prog_reg_desc=TSHV [iec61883 @ 0x555754cd2a40] stream=2 stream_type=3 pid=814 prog_reg_desc=TSHV [iec61883 @ 0x555754cd2a40] stream=3 stream_type=a0 pid=815 prog_reg_desc=TSHV [iec61883 @ 0x555754cd2a40] stream=4 stream_type=a1 pid=811 prog_reg_desc=TSHV [iec61883 @ 0x555754cd2a40] parser not found for codec none, packets or times may be invalid. [mpeg2video @ 0x555754ceeec0] Invalid frame dimensions 0x0. [iec61883 @ 0x555754cd2a40] parser not found for codec none, packets or times may be invalid. [iec61883 @ 0x555754cd2a40] max_analyze_duration 1 reached at 24000 microseconds st:2 [iec61883 @ 0x555754cd2a40] Could not find codec parameters for stream 0 (Unknown: none): unknown codec Consider increasing the value for the 'analyzeduration' (1) and 'probesize' (10000000) options [iec61883 @ 0x555754cd2a40] Could not find codec parameters for stream 1 (Video: mpeg2video, 1 reference frame ([2][0][0][0] / 0x0002), none(tv)): unspecified size Consider increasing the value for the 'analyzeduration' (1) and 'probesize' (10000000) options [iec61883 @ 0x555754cd2a40] Could not find codec parameters for stream 3 (Unknown: none ([160][0][0][0] / 0x00A0)): unknown codec Consider increasing the value for the 'analyzeduration' (1) and 'probesize' (10000000) options [iec61883 @ 0x555754cd2a40] Could not find codec parameters for stream 4 (Unknown: none ([161][0][0][0] / 0x00A1)): unknown codec Consider increasing the value for the 'analyzeduration' (1) and 'probesize' (10000000) options Input #0, iec61883, from 'auto': Duration: N/A, start: 815.829378, bitrate: 384 kb/s Program 100 Stream #0:1, 1, 1/90000: Video: mpeg2video, 1 reference frame ([2][0][0][0] / 0x0002), none(tv), 90k tbr, 90k tbn Stream #0:2, 3, 1/90000: Audio: mp2 (mp3float) ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s Stream #0:3, 1, 1/90000: Unknown: none ([160][0][0][0] / 0x00A0) Stream #0:4, 1, 1/90000: Unknown: none ([161][0][0][0] / 0x00A1) No Program Stream #0:0, 0, 1/90000: Unknown: none Successfully opened the file. Parsing a group of options: output url out6.m2t. Applying option c (select encoder/decoder ('copy' to copy stream without reencoding)) with argument copy. Successfully parsed a group of options. Opening an output file: out6.m2t. [out#0/mpegts @ 0x555754cfe780] No explicit maps, mapping streams automatically... [vost#0:0/copy @ 0x555754cfcec0] Created video stream from input stream 0:1 [aost#0:1/copy @ 0x555754cfd500] Created audio stream from input stream 0:2 [file @ 0x555754cfda80] Setting default whitelist 'file,crypto,data' Successfully opened the file. Stream mapping: Stream #0:1 -> #0:0 (copy) Stream #0:2 -> #0:1 (copy) [mpegts @ 0x555754cfe8c0] service 1 using PCR in pid=256, pcr_period=0ms [mpegts @ 0x555754cfe8c0] muxrate VBR, sdt every 500 ms, pat/pmt every 100 ms Output #0, mpegts, to 'out6.m2t': Metadata: encoder : Lavf61.7.100 Stream #0:0, 0, 1/90000: Video: mpeg2video, 1 reference frame ([2][0][0][0] / 0x0002), none(tv), q=2-31, 90k tbr, 90k tbn Stream #0:1, 0, 1/90000: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s [out#0/mpegts @ 0x555754cfe780] Starting thread... [in#0/iec61883 @ 0x555754cd2780] Starting thread... Press [q] to stop, [?] for help frame= 9 fps=0.0 q=-1.0 size= 768KiB time=00:00:00.60 bitrate=10485.8kbits/s speed= 1.2x frame= 22 fps= 22 q=-1.0 size= 2304KiB time=00:00:01.10 bitrate=17096.3kbits/s speed= 1.1x frame= 34 fps= 23 q=-1.0 size= 3584KiB time=00:00:01.60 bitrate=18258.8kbits/s speed=1.07x frame= 47 fps= 23 q=-1.0 size= 5376KiB time=00:00:02.11 bitrate=20852.4kbits/s speed=1.06x frame= 59 fps= 24 q=-1.0 size= 6912KiB time=00:00:02.61 bitrate=21644.9kbits/s speed=1.05x frame= 71 fps= 24 q=-1.0 size= 8448KiB time=00:00:03.09 bitrate=22353.4kbits/s speed=1.03x frame= 84 fps= 24 q=-1.0 size= 10240KiB time=00:00:03.60 bitrate=23301.7kbits/s speed=1.03x frame= 97 fps= 24 q=-1.0 size= 11776KiB time=00:00:04.10 bitrate=23506.1kbits/s speed=1.03x frame= 109 fps= 24 q=-1.0 size= 13312KiB time=00:00:04.60 bitrate=23665.8kbits/s speed=1.02x frame= 122 fps= 24 q=-1.0 size= 14848KiB time=00:00:05.11 bitrate=23794.0kbits/s speed=1.02x frame= 134 fps= 24 q=-1.0 size= 16640KiB time=00:00:05.61 bitrate=24272.6kbits/s speed=1.02x frame= 146 fps= 24 q=-1.0 size= 18176KiB time=00:00:06.09 bitrate=24425.5kbits/s speed=1.02x frame= 159 fps= 24 q=-1.0 size= 19712KiB time=00:00:06.60 bitrate=24466.8kbits/s speed=1.01x frame= 172 fps= 25 q=-1.0 size= 21248KiB time=00:00:07.10 bitrate=24502.2kbits/s speed=1.01x frame= 184 fps= 25 q=-1.0 size= 22784KiB time=00:00:07.60 bitrate=24532.9kbits/s speed=1.01x frame= 197 fps= 25 q=-1.0 size= 24576KiB time=00:00:08.11 bitrate=24818.4kbits/s speed=1.01x frame= 209 fps= 25 q=-1.0 size= 26112KiB time=00:00:08.59 bitrate=24896.4kbits/s speed=1.01x frame= 221 fps= 25 q=-1.0 size= 27648KiB time=00:00:09.09 bitrate=24900.2kbits/s speed=1.01x frame= 234 fps= 25 q=-1.0 size= 29184KiB time=00:00:09.60 bitrate=24903.7kbits/s speed=1.01x frame= 247 fps= 25 q=-1.0 size= 30720KiB time=00:00:10.10 bitrate=24906.8kbits/s speed=1.01x frame= 259 fps= 25 q=-1.0 size= 32256KiB time=00:00:10.60 bitrate=24909.6kbits/s speed=1.01x frame= 272 fps= 25 q=-1.0 size= 34048KiB time=00:00:11.11 bitrate=25100.9kbits/s speed=1.01x frame= 284 fps= 25 q=-1.0 size= 35584KiB time=00:00:11.59 bitrate=25147.0kbits/s speed=1.01x frame= 296 fps= 25 q=-1.0 size= 37120KiB time=00:00:12.09 bitrate=25139.5kbits/s speed=1.01x frame= 309 fps= 25 q=-1.0 size= 38656KiB time=00:00:12.60 bitrate=25132.5kbits/s speed=1.01x frame= 322 fps= 25 q=-1.0 size= 40192KiB time=00:00:13.10 bitrate=25126.1kbits/s speed=1.01x frame= 334 fps= 25 q=-1.0 size= 41728KiB time=00:00:13.60 bitrate=25120.2kbits/s speed=1.01x frame= 347 fps= 25 q=-1.0 size= 43520KiB time=00:00:14.11 bitrate=25263.3kbits/s speed=1.01x frame= 359 fps= 25 q=-1.0 size= 45056KiB time=00:00:14.59 bitrate=25294.6kbits/s speed=1.01x frame= 371 fps= 25 q=-1.0 size= 46592KiB time=00:00:15.09 bitrate=25283.6kbits/s speed=1.01x frame= 384 fps= 25 q=-1.0 size= 48384KiB time=00:00:15.60 bitrate=25407.8kbits/s speed=1.01x frame= 397 fps= 25 q=-1.0 size= 49920KiB time=00:00:16.10 bitrate=25394.0kbits/s speed=1.01x frame= 409 fps= 25 q=-1.0 size= 51200KiB time=00:00:16.60 bitrate=25254.7kbits/s speed=1.01x frame= 422 fps= 25 q=-1.0 size= 52992KiB time=00:00:17.11 bitrate=25368.8kbits/s speed=1.01x frame= 434 fps= 25 q=-1.0 size= 54528KiB time=00:00:17.59 bitrate=25391.8kbits/s speed= 1x frame= 446 fps= 25 q=-1.0 size= 56064KiB time=00:00:18.09 bitrate=25380.0kbits/s speed= 1x frame= 459 fps= 25 q=-1.0 size= 57856KiB time=00:00:18.60 bitrate=25481.5kbits/s speed=1.01x frame= 472 fps= 25 q=-1.0 size= 59392KiB time=00:00:19.10 bitrate=25467.9kbits/s speed=1.01x frame= 484 fps= 25 q=-1.0 size= 60928KiB time=00:00:19.60 bitrate=25455.0kbits/s speed=1.01x frame= 497 fps= 25 q=-1.0 size= 62464KiB time=00:00:20.11 bitrate=25442.8kbits/s speed=1.01x frame= 509 fps= 25 q=-1.0 size= 64000KiB time=00:00:20.59 bitrate=25460.8kbits/s speed= 1x frame= 521 fps= 25 q=-1.0 size= 65792KiB time=00:00:21.09 bitrate=25548.4kbits/s speed= 1x frame= 534 fps= 25 q=-1.0 size= 67328KiB time=00:00:21.60 bitrate=25534.8kbits/s speed= 1x frame= 547 fps= 25 q=-1.0 size= 68864KiB time=00:00:22.10 bitrate=25521.8kbits/s speed= 1x frame= 559 fps= 25 q=-1.0 size= 70400KiB time=00:00:22.60 bitrate=25509.4kbits/s speed= 1x frame= 572 fps= 25 q=-1.0 size= 72192KiB time=00:00:23.11 bitrate=25588.3kbits/s speed= 1x frame= 584 fps= 25 q=-1.0 size= 73728KiB time=00:00:23.59 bitrate=25601.0kbits/s speed= 1x frame= 596 fps= 25 q=-1.0 size= 75264KiB time=00:00:24.09 bitrate=25587.8kbits/s speed= 1x frame= 609 fps= 25 q=-1.0 size= 76800KiB time=00:00:24.60 bitrate=25575.0kbits/s speed= 1x frame= 622 fps= 25 q=-1.0 size= 78336KiB time=00:00:25.10 bitrate=25562.8kbits/s speed= 1x frame= 634 fps= 25 q=-1.0 size= 79872KiB time=00:00:25.60 bitrate=25551.1kbits/s speed= 1x frame= 647 fps= 25 q=-1.0 size= 81664KiB time=00:00:26.08 bitrate=25643.6kbits/s speed= 1x frame= 659 fps= 25 q=-1.0 size= 83200KiB time=00:00:26.59 bitrate=25630.8kbits/s speed= 1x frame= 671 fps= 25 q=-1.0 size= 84736KiB time=00:00:27.09 bitrate=25618.4kbits/s speed= 1x frame= 684 fps= 25 q=-1.0 size= 86272KiB time=00:00:27.60 bitrate=25606.5kbits/s speed= 1x frame= 696 fps= 25 q=-1.0 size= 87808KiB time=00:00:28.10 bitrate=25595.0kbits/s speed= 1x frame= 709 fps= 25 q=-1.0 size= 89344KiB time=00:00:28.60 bitrate=25584.0kbits/s speed= 1x [in#0/iec61883 @ 0x555754cd2780] Terminating thread with return code 0 (success) [out#0/mpegts @ 0x555754cfe780] All streams finished [out#0/mpegts @ 0x555754cfe780] Terminating thread with return code 0 (success) [AVIOContext @ 0x555754cf4200] Statistics: 93923108 bytes written, 0 seeks, 359 writeouts [out#0/mpegts @ 0x555754cfe780] Output file #0 (out6.m2t): [out#0/mpegts @ 0x555754cfe780] Output stream #0:0 (video): 722 packets muxed (90290112 bytes); [out#0/mpegts @ 0x555754cfe780] Output stream #0:1 (audio): 1212 packets muxed (1396224 bytes); [out#0/mpegts @ 0x555754cfe780] Total: 1934 packets (91686336 bytes) muxed [out#0/mpegts @ 0x555754cfe780] video:88174KiB audio:1364KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 2.439591% frame= 722 fps= 25 q=-1.0 Lsize= 91722KiB time=00:00:29.08 bitrate=25831.4kbits/s speed= 1x [in#0/iec61883 @ 0x555754cd2780] Input file #0 (auto): [in#0/iec61883 @ 0x555754cd2780] Input stream #0:1 (video): 727 packets read (90852850 bytes); [in#0/iec61883 @ 0x555754cd2780] Input stream #0:2 (audio): 1213 packets read (1397376 bytes); [in#0/iec61883 @ 0x555754cd2780] Total: 1940 packets (92250226 bytes) demuxed Exiting normally, received signal 2.

2 5