November 2017 - FFmpeg-trac - lists.ffmpeg.org

#4683(undetermined:new): mjpeg: 12bpp fix artefacts
by FFmpeg 29 Jun '24

29 Jun '24

#4683: mjpeg: 12bpp fix artefacts -------------------------------------+------------------------------------- Reporter: ami_stuff | Owner: Type: defect | Status: new Priority: normal | Component: Version: | undetermined unspecified | Keywords: Blocked By: | Blocking: Reproduced by developer: 0 | Analyzed by developer: 0 -------------------------------------+------------------------------------- artefacts on the logo {{{ C:\>ffmpeg -i 12bpp.jpg out.bmp ffmpeg version N-73189-g7728d23 Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.9.2 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable- libcaca -- enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable- librtmp --en able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo- amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena ble-decklink --enable-zlib libavutil 54. 27.100 / 54. 27.100 libavcodec 56. 45.100 / 56. 45.100 libavformat 56. 38.102 / 56. 38.102 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 18.100 / 5. 18.100 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 2.100 / 1. 2.100 libpostproc 53. 3.100 / 53. 3.100 Input #0, image2, from '12bpp.jpg': Duration: 00:00:00.04, start: 0.000000, bitrate: 65308 kb/s Stream #0:0: Video: mjpeg, gray16le(12 bpc, bt470bg/unknown/unknown), 999x74 9 [SAR 300:300 DAR 999:749], 25 tbr, 25 tbn, 25 tbc Output #0, image2, to 'out.bmp': Metadata: encoder : Lavf56.38.102 Stream #0:0: Video: bmp, gray, 999x749 [SAR 1:1 DAR 999:749], q=2-31, 200 kb /s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc56.45.100 bmp Stream mapping: Stream #0:0 -> #0:0 (mjpeg (native) -> bmp (native)) Press [q] to stop, [?] for help frame= 1 fps=0.0 q=0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A video:732kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing o verhead: unknown }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/4683> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#6011(undetermined:new): Videotoolshed violates FFmpeg copyrights
by FFmpeg 22 Jun '24

22 Jun '24

#6011: Videotoolshed violates FFmpeg copyrights -------------------------------------+------------------------------------- Reporter: cehoyos | Owner: Type: license | Status: new violation | Component: Priority: normal | undetermined Version: | Keywords: unspecified | Blocking: Blocked By: | Analyzed by developer: 0 Reproduced by developer: 0 | -------------------------------------+------------------------------------- I downloaded ltcconvert_479dmg.zip (size 34748194, md5sum 0bb9daa77b87b72f2b5cca41193893e0) from !https://www.videotoolshed.com/product/ltc-convert-auxtc/ The archive contains a binary based on FFmpeg, no source code visible, strange attribution. -- Ticket URL: <https://trac.ffmpeg.org/ticket/6011> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#3386(undetermined:new): [H264] [Regression] illegal short term buffer state detected
by FFmpeg 19 Jun '24

19 Jun '24

#3386: [H264] [Regression] illegal short term buffer state detected -------------------------------------+------------------------------------- Reporter: | Type: defect Underground78 | Priority: normal Status: new | Version: git- Component: | master undetermined | Blocked By: Keywords: | Reproduced by developer: 0 Blocking: | Analyzed by developer: 0 | -------------------------------------+------------------------------------- '''Summary of the bug:''' A regression in H264 decoding was apparently introduced about 3 months ago. It leads to artifacts appearing during playback with "illegal short term buffer state detected" errors being reported in the log. '''How to reproduce:''' Try [http://stfcc.org/misc/bbc2.sample.ts this sample] in ffplay for example. {{{ >ffplay.exe bbc2.sample.ts ffplay version N-60646-gd601106 Copyright (c) 2003-2014 the FFmpeg developers built on Feb 15 2014 03:11:41 with gcc 4.8.2 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable- librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo- aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-zlib libavutil 52. 63.101 / 52. 63.101 libavcodec 55. 52.101 / 55. 52.101 libavformat 55. 32.101 / 55. 32.101 libavdevice 55. 9.101 / 55. 9.101 libavfilter 4. 1.102 / 4. 1.102 libswscale 2. 5.101 / 2. 5.101 libswresample 0. 17.104 / 0. 17.104 libpostproc 52. 3.100 / 52. 3.100 [NULL @ 04011580] start time is not set in estimate_timings_from_pts [mpegts @ 0400d160] PES packet size mismatch Last message repeated 1 times Input #0, mpegts, from 'bbc2.sample.ts': Duration: 00:00:47.48, start: 0.200000, bitrate: 8424 kb/s Program 1 Stream #0:0[0x157c]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv , bt709), 1440x1080 [SAR 4:3 DAR 16:9], 23.75 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:1[0x157d](eng): Audio: ac3 ([6][0][0][0] / 0x0006), 48000 Hz, ster eo, fltp, 192 kb/s Stream #0:2[0x157f](eng): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006) Stream #0:3[0x1580](eng): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006) No codec could be found with id 94215 [h264 @ 054c1980] illegal short term buffer state detected }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/3386> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#5718(undetermined:new): ffmpeg not remapping channels for libopus automatically
by FFmpeg 16 Jun '24

16 Jun '24

#5718: ffmpeg not remapping channels for libopus automatically -------------------------------------+------------------------------------- Reporter: agressiv | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: libopus | Blocked By: channelmap | Reproduced by developer: 0 Blocking: | Analyzed by developer: 0 | -------------------------------------+------------------------------------- {{{ [libopus @ 00000000026ad020] Invalid channel layout 5.1(side) for specified mapping family -1. }}} Summary of the bug: Encode a 5.1 audio file with 5.1(side) channel map How to reproduce: {{{ % ffmpeg -i movie-with-51side.mkv -c:a libopus -b:a 256k output.mkv ffmpeg version N-81025-g25ca74d built on July 15 2016 }}} ffmpeg version N-80101-gd970f7b automatically remapped these to the rear channels since libopus doesn't seem to allow side channels. I now have to explicitly add: {{{ -af "channelmap=channel_layout=5.1" }}} Not sure if this is expected behavior or not. Without this channelmap, it aborts. Command-line opusenc automatically remaps as well. -- Ticket URL: <https://trac.ffmpeg.org/ticket/5718> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#5942(undetermined:new): mpeg-4 als: "quant_cof 237 is out of range" with multichannel 16bit
by FFmpeg 05 Jun '24

05 Jun '24

#5942: mpeg-4 als: "quant_cof 237 is out of range" with multichannel 16bit -------------------------------------+------------------------------------- Reporter: ami_stuff | Owner: Type: defect | Status: new Priority: normal | Component: Version: | undetermined unspecified | Keywords: Blocked By: | Blocking: Reproduced by developer: 0 | Analyzed by developer: 0 -------------------------------------+------------------------------------- no such problem with mono/stereo files encoded with: {{{ C:\>mp4alsRM23.exe -7 -MP4 D:\16multi.wav }}} {{{ C:\>ffmpeg -i D:\16multi.mp4 D:\out.wav ffmpeg version N-78758-g5156578 Copyright (c) 2000-2016 the FFmpeg developers built with gcc 5.3.0 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable- libcaca -- enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable- librtmp --en able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena ble-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable- libvorbis -- enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-lib x265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-d ecklink --enable-zlib libavutil 55. 19.100 / 55. 19.100 libavcodec 57. 27.100 / 57. 27.100 libavformat 57. 26.100 / 57. 26.100 libavdevice 57. 0.101 / 57. 0.101 libavfilter 6. 37.100 / 6. 37.100 libswscale 4. 0.100 / 4. 0.100 libswresample 2. 0.101 / 2. 0.101 libpostproc 54. 0.100 / 54. 0.100 Guessed Channel Layout for Input Stream #0.0 : 5.1 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\16multi.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42isom creation_time : 2016-11-11 17:28:53 Duration: 00:00:05.00, start: 0.000000, bitrate: 1220 kb/s Stream #0:0(und): Audio: mp4als (mp4a / 0x6134706D), 48000 Hz, 6 channels, s 16, 1219 kb/s (default) Metadata: creation_time : 2016-11-11 17:28:53 Output #0, wav, to 'D:\out.wav': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42isom ISFT : Lavf57.26.100 Stream #0:0(und): Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 5.1, s 16, 4608 kb/s (default) Metadata: creation_time : 2016-11-11 17:28:53 encoder : Lavc57.27.100 pcm_s16le Stream mapping: Stream #0:0 -> #0:0 (mp4als (als) -> pcm_s16le (native)) Press [q] to stop, [?] for help [als @ 038f0d60] quant_cof 237 is out of range. [als @ 038f0d60] Reading frame data failed. Skipping RA unit. size= 720kB time=00:00:01.28 bitrate=4608.6kbits/s speed=N/A video:0kB audio:720kB subtitle:0kB other streams:0kB global headers:0kB muxing o verhead: 0.013835% }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/5942> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#6354(avfilter:new): segfault using signature filter on some videos
by FFmpeg 03 Jun '24

03 Jun '24

#6354: segfault using signature filter on some videos -----------------------------------+--------------------------------------- Reporter: smarquard | Type: defect Status: new | Priority: normal Component: avfilter | Version: unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -----------------------------------+--------------------------------------- The attached videos produce a segfault when using the signature filter. Using the x64 binary build for ffmpeg 3.3: https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-64bit- static.tar.xz How to reproduce: {{{ ffmpeg -i v1.avi -i v2.avi -filter_complex "[0:v][1:v] signature=nb_inputs=2:detectmode=full" -map :v -f null - }}} Most videos work fine, but these particular ones cause a segfault and core dump though the static build does not contain debugging symbols so I was not able to get a backtrace. ffmpeg version 3.3-static http://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2017 the FFmpeg developers built with gcc 5.4.1 (Debian 5.4.1-8) 20170304 configuration: --enable-gpl --enable-version3 --enable-static --disable- debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-5 --enable-fontconfig --enable-frei0r --enable-gnutls --enable- gray --enable-libass --enable-libfreetype --enable-libfribidi --enable- libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable- libopenjpeg --enable-libopus --enable-librtmp --enable-libsoxr --enable- libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg libavutil 55. 58.100 / 55. 58.100 libavcodec 57. 89.100 / 57. 89.100 libavformat 57. 71.100 / 57. 71.100 libavdevice 57. 6.100 / 57. 6.100 libavfilter 6. 82.100 / 6. 82.100 libswscale 4. 6.100 / 4. 6.100 libswresample 2. 7.100 / 2. 7.100 libpostproc 54. 5.100 / 54. 5.100 -- Ticket URL: <https://trac.ffmpeg.org/ticket/6354> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#5309(undetermined:new): Seek doesn't work in some .mp4 files
by FFmpeg 25 May '24

25 May '24

#5309: Seek doesn't work in some .mp4 files -------------------------------------+------------------------------------- Reporter: Arnaud | Type: defect Status: new | Priority: normal Component: | Version: git- undetermined | master Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Summary of the bug: How to reproduce: {{{ % ffplay -ss 5 ffmpeg version: ffplay version N-78958-g8c24523 built from latest git, on Ubuntu 14.04.3, on 2016-03-07 }}} File is seek_not_working.mp4 The file plays well but always from the beginning: the seek isn't working. -- Ticket URL: <https://trac.ffmpeg.org/ticket/5309> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#5910(undetermined:new): AAC to PCM conversion inserts extra silence in the beginning
by FFmpeg 25 May '24

25 May '24

#5910: AAC to PCM conversion inserts extra silence in the beginning -------------------------------------+------------------------------------- Reporter: | Type: defect jwilhelmsson | Priority: normal Status: new | Version: Component: | unspecified undetermined | Blocked By: Keywords: aac pcm | Reproduced by developer: 0 Blocking: | Analyzed by developer: 0 | -------------------------------------+------------------------------------- Summary of the bug: When converting AAC audio files/streams to PCM extra silence is inserted in the beginning of the output file. Note: This may very well be the same issue as ticket #2325, but since I believe I have more information I elected to create a new one. The long version: My company dub cartoons, so we receive many kinds of video formats from our various clients. Recently one of them complained that our final delivery was out of sync compared to the original material, and that's how this issue was discovered. The reference files from the client were mp4:s with aac audio, and when I converted said audio into wav files (for use in our recording software, Steinberg Nuendo) extra silence got inserted in the beginning, making us record everything out of sync. That it was ffmpeg that was in the wrong was concluded by comparing with files converted by ProTools, Nuendo, and QuickTime - which are all the same and different from the ffmpeg output. After lots of testing I concluded that it's the AAC to PCM conversion that's the culprit (ie. the video container format is mostly irrelevant), and also that the length of the inserted silence varies between different files. I haven't been able to pinpoint exactly what causes the difference. Attached are five aac files, plus wav files converted by ffmpeg (3.1.4) and QuickTime Pro (7.7.9) clearly showing the difference. Since the files come from commercial productions I've only included 7 to 10 seconds from each, but it's enough to see the error. Two of the files insert approximately 44 milliseconds (or about 2100 samples) of silence, two insert 108 milliseconds (about 5200 samples), and one oddly enough gets only 32 milliseconds of silence even though the audio is shifted 44 ms (this is easy to see since it starts with a test tone). How to reproduce: The aac files were converted by ffmpeg with the command (I'll attach outputs in separate messages below): {{{ ffmpeg -i input -c:a pcm_s24le -ar 48k output }}} They were also converted with QuickTime Pro with the same settings (24 bits, 48kHz). I then compared the waveforms in both Nuendo and Audacity. The offset values were measured by manually marking an area in Audacity, so they are very approximate. The files: The attached files come from one movie and two tv series (two episodes each). The movie files are called "g", and the series "tj" and "td". The aac files were extracted from the original mp4 files by stream copying: {{{ ffmpeg -i input -c:a copy -t 10 output }}} The movie file starts with a test tone, and is also the one which differs 32 ms in the beginning of the test tone, but 44 at the end of it. Random notes: The error is the same when converting directly from the mp4 file and when converting from an extracted aac. Extracting PCM wav from a mov container produces no errors. If I convert the aac stream to a new aac file there's still an error, but only half as long. I've only tested this on one file, but it produced a 22 ms gap instead of 44 ms. Compounded converting does not compound the error. Ie: Converting from aac to aac, and then converting that output file to aac again does not increase the error. Converting to a different bitrate/sample rate does not affect the result. Final words: I've done a lot of testing, but it's very possible that I've forgotten some vital information in this report, so please ask if you need more details. -- Ticket URL: <https://trac.ffmpeg.org/ticket/5910> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#6818(undetermined:new): FFmpeg fails to decode first frame in file due to multiple frames in a packet.
by FFmpeg 22 May '24

22 May '24

#6818: FFmpeg fails to decode first frame in file due to multiple frames in a packet. -------------------------------------+------------------------------------- Reporter: | Owner: dalecurtis | Status: new Type: defect | Component: Priority: normal | undetermined Version: | Keywords: unspecified | Blocking: Blocked By: | Analyzed by developer: 0 Reproduced by developer: 0 | -------------------------------------+------------------------------------- Using ToT with the attached file: $ ffmpeg -i bear-1280x720-a_frag-cenc_clear-all.mp4 -f framecrc out.txt [aac @ 0xf57080] Multiple frames in a packet. [aac @ 0xf57080] channel element 0.0 is not allocated Error while decoding stream #0:0: Invalid data found when processing input Which comes from these lines: http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavcodec/decode.c;hb=HEAD#… http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavcodec/aacdec_template.c… The new avcodec_send_packet(), avcodec_receive_frame() APIs offer no way to handle multi-frame packets, yet ffmpeg is still demuxing / creating such packets. So we end up with decoder errors when the remainder of the packet isn't handled. It seems either ffmpeg should not produce such packets or it should properly handle multi-frame packets; either by extending avcodec_receive_frame() to loop over the remainder of the packet or to have aac_decode_frame() properly do this internally. -- Ticket URL: <https://trac.ffmpeg.org/ticket/6818> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#6037(avformat:new): mkv muxing broken
by FFmpeg 22 May '24

22 May '24

#6037: mkv muxing broken ----------------------------------+--------------------------------------- Reporter: q3cpma | Type: defect Status: new | Priority: important Component: avformat | Version: unspecified Keywords: mkv | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | ----------------------------------+--------------------------------------- Summary of the bug: Muxing two working files (AC3 stream + DVD sub stream and a freshly encoded ffv1 stream) into a mkv produces a broken file: seeking around can break (mute) audio. Reproducible with both mpv and ffplay (example: seek to around 5.5s). It seem like http://ffmpeg.gusari.org/viewtopic.php?f=11&t=2713 is related. On the longer sample, I also get: -Audio being muted without having to seek -"Starting new cluster due to timestamp" matroska warnings during mux -"[mkv] Too many packets in the demuxer packet queues" errors in mpv How to reproduce: {{{ ffmpeg -y -i 20s.mkv -i ffv1.mkv -map 0:a:1 -map 0:s -map 1:v -c copy out.mkv >ffmpeg.log 2>&1 ffmpeg version 3.2.2 Copyright (c) 2000-2016 the FFmpeg developers built with gcc 4.9.3 (Gentoo 4.9.3 p1.5, pie-0.6.4) configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/share/doc/ffmpeg-3.2.2/html --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-O2 -march=native -mprefer-avx128 -mvzeroupper -pipe' --disable-static --enable-avfilter --enable-avresample --disable-stripping --enable-nonfree --disable-indev=v4l2 --disable- outdev=v4l2 --disable-indev=oss --disable-indev=jack --disable-outdev=oss --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable- gcrypt --disable-gnutls --disable-gmp --enable-gpl --enable-hardcoded- tables --enable-iconv --disable-lzma --enable-network --enable-openssl --enable-postproc --disable-libsmbclient --enable-ffplay --enable-sdl2 --disable-vaapi --disable-vdpau --enable-xlib --disable-libxcb --disable- libxcb-shm --disable-libxcb-xfixes --enable-zlib --disable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --disable- openal --enable-opengl --disable-libv4l2 --disable-libpulse --disable- libopencore-amrwb --disable-libopencore-amrnb --disable-libfdk-aac --disable-libopenjpeg --enable-libbluray --disable-libcelt --disable- libgme --disable-libgsm --disable-mmal --disable-libmodplug --enable- libopus --disable-libilbc --disable-librtmp --disable-libssh --disable- libschroedinger --disable-libspeex --enable-libvorbis --enable-libvpx --disable-libzvbi --disable-libbs2b --disable-chromaprint --disable- libebur128 --disable-libflite --disable-frei0r --disable-libfribidi --disable-fontconfig --disable-ladspa --enable-libass --disable- libfreetype --disable-librubberband --enable-libzimg --disable-libsoxr --enable-pthreads --disable-libvo-amrwbenc --enable-libmp3lame --disable- libkvazaar --disable-nvenc --disable-libopenh264 --disable-libsnappy --disable-libtheora --disable-libtwolame --disable-libwavpack --disable- libwebp --enable-libx264 --enable-libx265 --disable-libxvid --enable- x11grab --disable-amd3dnow --disable-amd3dnowext --disable-avx2 --cpu=host --disable-doc --disable-htmlpages --enable-manpages libavutil 55. 34.100 / 55. 34.100 libavcodec 57. 64.101 / 57. 64.101 libavformat 57. 56.100 / 57. 56.100 libavdevice 57. 1.100 / 57. 1.100 libavfilter 6. 65.100 / 6. 65.100 libavresample 3. 1. 0 / 3. 1. 0 libswscale 4. 2.100 / 4. 2.100 libswresample 2. 3.100 / 2. 3.100 libpostproc 54. 1.100 / 54. 1.100 Input #0, matroska,webm, from '20s.mkv': Metadata: title : Gunsmith Cats ENCODER : Lavf57.56.100 Duration: 00:00:20.16, start: 0.016000, bitrate: 7009 kb/s Chapter #0:0: start 0.064000, end 20.000000 Metadata: title : 0 1 Stream #0:0(eng): Audio: ac3, 48000 Hz, stereo, fltp, 224 kb/s (default) Metadata: title : Stereo BPS-eng : 224000 DURATION-eng : 00:29:17.152000000 NUMBER_OF_FRAMES-eng: 54911 NUMBER_OF_BYTES-eng: 49200256 SOURCE_ID-eng : 0180BD _STATISTICS_WRITING_APP-eng: MakeMKV v1.10.3 linux(x64-release) _STATISTICS_WRITING_DATE_UTC-eng: 2016-12-21 10:56:43 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID DURATION : 00:00:20.016000000 Stream #0:1(jpn): Audio: ac3, 48000 Hz, stereo, fltp, 224 kb/s Metadata: title : Stereo BPS-eng : 224000 DURATION-eng : 00:29:13.728000000 NUMBER_OF_FRAMES-eng: 54804 NUMBER_OF_BYTES-eng: 49104384 SOURCE_ID-eng : 0181BD _STATISTICS_WRITING_APP-eng: MakeMKV v1.10.3 linux(x64-release) _STATISTICS_WRITING_DATE_UTC-eng: 2016-12-21 10:56:43 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID DURATION : 00:00:20.027000000 Stream #0:2(eng): Video: mpeg2video (Main), yuv420p(tv, top first), 720x576 [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 1k tbn, 50 tbc Metadata: BPS-eng : 6522010 DURATION-eng : 00:29:17.200000000 NUMBER_OF_FRAMES-eng: 43930 NUMBER_OF_BYTES-eng: 1432559524 SOURCE_ID-eng : 0100E0 _STATISTICS_WRITING_APP-eng: MakeMKV v1.10.3 linux(x64-release) _STATISTICS_WRITING_DATE_UTC-eng: 2016-12-21 10:56:43 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID DURATION : 00:00:20.160000000 Stream #0:3(eng): Subtitle: dvd_subtitle, 720x576 (default) Metadata: BPS-eng : 5142 DURATION-eng : 00:28:42.315200000 NUMBER_OF_FRAMES-eng: 371 NUMBER_OF_BYTES-eng: 1107152 SOURCE_ID-eng : 0120BD _STATISTICS_WRITING_APP-eng: MakeMKV v1.10.3 linux(x64-release) _STATISTICS_WRITING_DATE_UTC-eng: 2016-12-21 10:56:43 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID DURATION : 00:00:00.000000000 Input #1, matroska,webm, from 'ffv1.mkv': Metadata: ENCODER : Lavf57.56.100 Duration: 00:00:20.00, start: 0.000000, bitrate: 57823 kb/s Stream #1:0: Video: ffv1 (FFV1 / 0x31564646), yuv420p(progressive), 744x568, 50 fps, 50 tbr, 1k tbn, 1k tbc (default) Metadata: ENCODER : Lavc57.64.101 ffv1 DURATION : 00:00:20.000000000 Output #0, matroska, to 'out.mkv': Metadata: title : Gunsmith Cats encoder : Lavf57.56.100 Chapter #0:0: start 0.048000, end 19.984000 Metadata: title : 0 1 Stream #0:0(jpn): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, 224 kb/s Metadata: title : Stereo BPS-eng : 224000 DURATION-eng : 00:29:13.728000000 NUMBER_OF_FRAMES-eng: 54804 NUMBER_OF_BYTES-eng: 49104384 SOURCE_ID-eng : 0181BD _STATISTICS_WRITING_APP-eng: MakeMKV v1.10.3 linux(x64-release) _STATISTICS_WRITING_DATE_UTC-eng: 2016-12-21 10:56:43 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID DURATION : 00:00:20.027000000 Stream #0:1(eng): Subtitle: dvd_subtitle, 720x576 (default) Metadata: BPS-eng : 5142 DURATION-eng : 00:28:42.315200000 NUMBER_OF_FRAMES-eng: 371 NUMBER_OF_BYTES-eng: 1107152 SOURCE_ID-eng : 0120BD _STATISTICS_WRITING_APP-eng: MakeMKV v1.10.3 linux(x64-release) _STATISTICS_WRITING_DATE_UTC-eng: 2016-12-21 10:56:43 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID DURATION : 00:00:00.000000000 Stream #0:2: Video: ffv1 (FFV1 / 0x31564646), yuv420p(progressive), 744x568, q=2-31, 50 fps, 50 tbr, 1k tbn, 1k tbc (default) Metadata: ENCODER : Lavc57.64.101 ffv1 DURATION : 00:00:20.000000000 Stream mapping: Stream #0:1 -> #0:0 (copy) Stream #0:3 -> #0:1 (copy) Stream #1:0 -> #0:2 (copy) Press [q] to stop, [?] for help frame= 1000 fps=0.0 q=-1.0 Lsize= 141718kB time=00:00:19.98 bitrate=58102.8kbits/s speed=37.7x video:141160kB audio:540kB subtitle:0kB other streams:0kB global headers:1kB muxing overhead: 0.012737% }}} Files 20s.mkv: https://files.catbox.moe/4bdv0o.mkv ffv1.mkv: https://files.catbox.moe/zp0brx.mkv (or you can convert 20s.mkv to ffv1.mkv) out.mkv: ask if you can't reproduce -- Ticket URL: <https://trac.ffmpeg.org/ticket/6037> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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