October 2021 - FFmpeg-trac - lists.ffmpeg.org

#6468(undetermined:new): ffmpeg doesn't maintain chapters when concatenating two MP4 files using the concat demuxer
by FFmpeg 21 Jun '25

21 Jun '25

#6468: ffmpeg doesn't maintain chapters when concatenating two MP4 files using the concat demuxer -------------------------------------+------------------------------------- Reporter: whereswardy | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- I'm trying to concatenate two MP4 files using the concat demuxer and want to retain the chapter markers that exist in both files so that the output file contains all the chapters from both of my input files. The source files contain chapter markers according to `mediainfo` which I want to be maintained in the output, but when using the `-map_chapters` option in ffmpeg they don't appear in the output file. I'm concatenating the following two files from `streams.txt`: {{{ file 'episode2.mp4' file 'episode3.mp4' }}} which contain the following chapter/menu data (output cut down for brevity): {{{ $ mediainfo episode2.mp4 ... Menu ID : 3 Codec ID : text Duration : 22mn 25s Language : English Encoded date : UTC 2017-06-18 15:27:40 Tagged date : UTC 2017-06-18 15:27:40 Bit rate mode : CBR 00:00:00.000 : Chapter 1 00:00:59.720 : Chapter 2 ... }}} and I'm using the following ffmpeg command: {{{ ffmpeg -f concat -safe 0 -i streams.txt -map_metadata 0 -map_chapters 0 -c copy output.mp4 }}} however the output.mp4 file contains no chapter markers according to `mediainfo` and there's nothing viewable in any media player. I'm using ffmpeg 3.3.2 on Ubuntu 14.04.5: {{{ $ ffmpeg -version ffmpeg version 3.3.1 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3) configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable- nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable- libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable- libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable- libvidstab --enable-libwavpack --enable-nvenc 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 libavresample 3. 5. 0 / 3. 5. 0 libswscale 4. 6.100 / 4. 6.100 libswresample 2. 7.100 / 2. 7.100 libpostproc 54. 5.100 / 54. 5.100 }}} {{{ $ uname -a Linux server 3.13.0-119-generic #166-Ubuntu SMP Wed May 3 12:18:55 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/6468> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#9473(ffmpeg:new): gdigrab screen captures are interrupted by secure desktop pop-ups
by FFmpeg 15 Jun '25

15 Jun '25

#9473: gdigrab screen captures are interrupted by secure desktop pop-ups -----------------------------------+-------------------------------------- Reporter: leopold84 | Type: defect Status: new | Priority: important Component: ffmpeg | Version: git-master Keywords: gdigrab | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -----------------------------------+-------------------------------------- '''Summary of the bug:''' If you start screen capture with gdigrab and any secure desktop pop-up will appear (UAC or anything else), capture immediately stops. '''How to reproduce:''' 1. Start screen capture using '''gdigrab''' device as input {{{ ffmpeg -f gdigrab -framerate 30 -i desktop output.mkv }}} 2. Launch any program as administrator or make a secure desktop to appear any other way 3. Once returned to the normal desktop, you will see that capture has stopped with the error similar to this one {{{ Failed to capture image (error 5)trate= 2.2kbits/s speed=0.54x desktop: I/O error }}} '''Expect result:''' If it's not possible to capture secure desktop with gdigrab, at least make it so recording doesn't stop and capture a black screen instead of secure desktop -- Ticket URL: <https://trac.ffmpeg.org/ticket/9473> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#4908(avformat:new): Memory leak in ff_img_read_header() with custom io
by FFmpeg 06 Jun '25

06 Jun '25

#4908: Memory leak in ff_img_read_header() with custom io -------------------------------------+------------------------------------- Reporter: | Type: defect personalmountains | Priority: normal Status: new | Version: Component: avformat | unspecified Keywords: memory leak | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- [https://github.com/FFmpeg/FFmpeg/commit/726e253b004de9511f63625ce95feee4d9a… This patch] changed `probe_buffer` from an array to a pointer allocated with `av_realloc()`. It was correctly freed at the end of the block. However, [https://github.com/FFmpeg/FFmpeg/commit/6691eee48c7f08caf479ce3562a1c834475… that one] buried the `av_free()` call into `ffio_rewind_with_probe_data()`. Unsurprisingly, [https://github.com/FFmpeg/FFmpeg/commit/e6e8cc8ce9c2a398fbb51254a5067f4bd3c… a subsequent patch] made it so this call is skipped in the case of custom io, so the buffer is never freed. A simple `av_free()` after the call to `avio_seek()` on [https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/img2dec.c#L346 img2dec.c:346] might do the job. {{{ int probe_buffer_size = 2048; uint8_t *probe_buffer = av_realloc(NULL, probe_buffer_size + AVPROBE_PADDING_SIZE); // ... if (s1->flags & AVFMT_FLAG_CUSTOM_IO) { // this leaks probe_buffer because av_free() isn't called avio_seek(s1->pb, 0, SEEK_SET); } else ffio_rewind_with_probe_data(s1->pb, &probe_buffer, probe_buffer_size); }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/4908> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#9471(ffmpeg:new): EAC3 native encoder is only gapless in the beginning, not in the end
by FFmpeg 27 May '25

27 May '25

#9471: EAC3 native encoder is only gapless in the beginning, not in the end -------------------------------------+------------------------------------- Reporter: Balling | Type: defect Status: new | Priority: normal Component: ffmpeg | Version: git- Keywords: mp4 eac3 | master editlist gapless | Blocked By: Blocking: | Reproduced by developer: 1 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Summary of the bug: edts atmos (editlist) has media time and media duration, yet even though media time is correctly written for EAC3 and AAC (native EAC3 encoder has 256 sample of silence (a.k.a. encoder delay) that are then removed from the beginning with native encoder and native AAC has 1024 samples that are also working great) the media duration is not correctly written. Even if it were to be correctly written media duration is not applied on decoding even for AAC, see for example https://bugs.chromium.org/p/chromium/issues/detail?id=668999 that is still present in git-master!!! How to reproduce: {{{ % ffmpeg -f lavfi -i "sine=frequency=1000:duration=5" -c:a eac3 outeac3.mp4 ffmpeg version N-104341-g933765aa0e-20211013 Copyright (c) 2000-2021 the FFmpeg developers built with gcc 10-win32 (GCC) 20210408 configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-shared --disable-static --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --enable-libvmaf --enable-vulkan --disable-libxcb --disable-xlib --enable-amf --enable-libaom --enable- avisynth --enable-libdav1d --enable-libdavs2 --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libglslang --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable- libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable- librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable- libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm --disable-vaapi --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp --extra- version=20211013 libavutil 57. 7.100 / 57. 7.100 libavcodec 59. 12.100 / 59. 12.100 libavformat 59. 6.100 / 59. 6.100 libavdevice 59. 0.101 / 59. 0.101 libavfilter 8. 14.100 / 8. 14.100 libswscale 6. 1.100 / 6. 1.100 libswresample 4. 0.100 / 4. 0.100 libpostproc 56. 0.100 / 56. 0.100 Input #0, lavfi, from 'sine=frequency=1000:duration=5': Duration: N/A, start: 0.000000, bitrate: 705 kb/s Stream #0:0: Audio: pcm_s16le, 44100 Hz, mono, s16, 705 kb/s Stream mapping: Stream #0:0 -> #0:0 (pcm_s16le (native) -> eac3 (native)) Press [q] to stop, [?] for help Output #0, mp4, to 'outeac3.mp4': Metadata: encoder : Lavf59.6.100 Stream #0:0: Audio: eac3 (ec-3 / 0x332D6365), 44100 Hz, mono, fltp, 96 kb/s Metadata: encoder : Lavc59.12.100 eac3 size= 60kB time=00:00:05.00 bitrate= 98.2kbits/s speed= 487x video:0kB audio:59kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.166617% }}} {{{ Track duration: 5010 (0x00001392) - 5010 (0x1392) ms Media time: 256 (0x00000100) - 256 (0x100) ms Media rate: 65536 (0x00010000) - 1.000 }}} Now compare it to aac: ffmpeg -f lavfi -i "sine=frequency=1000:duration=5" -c:a aac fileaac.mp4: {{{ Track duration: 5000 (0x00001388) - 5000 (0x1388) ms Media time: 1024 (0x00000400) - 1024 (0x400) Media rate: 65536 (0x00010000) - 1.000 }}} Unfortunately a) Mediainfo tracer is buggy in that part: https://github.com/MediaArea/MediaInfoLib/issues/1441 b) I am not sure that media duration is really buggy since it is not applied anyway! c) I checked it all decoding to wav and checking in Audacity. d) I dunno whether sbgp and sgpd are needed (whether EAC3 depends on previous frames) Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker. -- Ticket URL: <https://trac.ffmpeg.org/ticket/9471> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#3643(undetermined:new): XYZ to RGB color space
by FFmpeg 27 May '25

27 May '25

#3643: XYZ to RGB color space -------------------------------------+------------------------------------- Reporter: tteam | Type: Status: new | enhancement Component: | Priority: normal undetermined | Version: Keywords: more XYZ to | unspecified RGB matrix | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Summary of the bug: XYZ to RGB colorspace conversion use only sRGB matrix and sometimes the conversion is deffected in red channel and the picture is dark. Hi all! Is it possible to add more color space matrix (in option) to XYZ to RGB conversion? Because the FFMPEG use only one matrix (sRGB) but lots of available, and best if the user can choose one. Because the problem is: sometimes the conversion is deffected the red is much more and the picture is dark. If possible please add some from this list. The default is the sRGB but optional the others. XYZ to RGB matrices: http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html Thanks -- Ticket URL: <https://trac.ffmpeg.org/ticket/3643> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#7337(undetermined:new): FFmpeg not recognizing WebVTT subtitle stream from HLS playlist
by FFmpeg 26 May '25

26 May '25

#7337: FFmpeg not recognizing WebVTT subtitle stream from HLS playlist -------------------------------------+------------------------------------- Reporter: newsfanatic | Type: defect Status: new | Priority: normal Component: | Version: git- undetermined | master Keywords: | Blocked By: WebVTT,HLS,m3u8,playlist,subtitles | Reproduced by developer: 0 Blocking: | Analyzed by developer: 0 | -------------------------------------+------------------------------------- Summary of the bug: When trying to ingest an HLS playlist from an m3u8 endpoint online to an mkv container, the subtitle stream is not being picked up at all. I can confirm that all other audio and video streams are being recognized, whilst the subtitle stream is not. I can also confirm that WebVTT is listed as a supported subtitle codec from ```ffmpeg -codecs```. Specifying ```-map 0``` also fails to pick up the subtitle stream. Am I just forgetting a flag or option? How to reproduce: {{{ % ffmpeg -report -i https://ajo.prod.reuters.tv/rest/v2/xato/playlist/assets/57630,163881,16382… -c copy reuters.mkv ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers built with Apple LLVM version 9.0.0 (clang-900.0.39.2) configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable- avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma libavutil 56. 14.100 / 56. 14.100 libavcodec 58. 18.100 / 58. 18.100 libavformat 58. 12.100 / 58. 12.100 libavdevice 58. 3.100 / 58. 3.100 libavfilter 7. 16.100 / 7. 16.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 1.100 / 5. 1.100 libswresample 3. 1.100 / 3. 1.100 libpostproc 55. 1.100 / 55. 1.100 }}} Subtitles are specified in the M3U8 manifest with the #EXT-X-MEDIA tag. M3U8 manifest: {{{ #EXTM3U #EXT-X-VERSION:4 #EXT-X-MEDIA:TYPE=SUBTITLES,GROUP- ID="subs",NAME="English",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,URI="https://ajo.prod.reuters.tv/rest/v2/captions/vtt/assets/57630,163881,163829…" #EXT-X-STREAM- INF:BANDWIDTH=360800,CODECS="mp4a.40.2,avc1.64000D",RESOLUTION=320x180,SUBTITLES="subs" https://ajo.prod.reuters.tv/rest/v2/playlist/assets/57630,163881,163829,574… #EXT-X-STREAM- INF:BANDWIDTH=499400,CODECS="mp4a.40.2,avc1.640015",RESOLUTION=512x288,SUBTITLES="subs" https://ajo.prod.reuters.tv/rest/v2/playlist/assets/57630,163881,163829,574… #EXT-X-STREAM- INF:BANDWIDTH=984500,CODECS="mp4a.40.2,avc1.64001E",RESOLUTION=640x360,SUBTITLES="subs" https://ajo.prod.reuters.tv/rest/v2/playlist/assets/57630,163881,163829,574… #EXT-X-STREAM- INF:BANDWIDTH=1490500,CODECS="mp4a.40.2,avc1.64001F",RESOLUTION=854x480,SUBTITLES="subs" https://ajo.prod.reuters.tv/rest/v2/playlist/assets/57630,163881,163829,574… #EXT-X-STREAM- INF:BANDWIDTH=2006400,CODECS="mp4a.40.2,avc1.64001F",RESOLUTION=960x540,SUBTITLES="subs" https://ajo.prod.reuters.tv/rest/v2/playlist/assets/57630,163881,163829,574… #EXT-X-STREAM- INF:BANDWIDTH=3020600,CODECS="mp4a.40.2,avc1.64001F",RESOLUTION=1024x576,SUBTITLES="subs" https://ajo.prod.reuters.tv/rest/v2/playlist/assets/57630,163881,163829,574… #EXT-X-STREAM- INF:BANDWIDTH=4021600,CODECS="mp4a.40.2,avc1.64001F",RESOLUTION=1280x720,SUBTITLES="subs" https://ajo.prod.reuters.tv/rest/v2/playlist/assets/57630,163881,163829,574… #EXT-X-STREAM- INF:BANDWIDTH=4998400,CODECS="mp4a.40.2,avc1.640028",RESOLUTION=1920x1080,SUBTITLES="subs" https://ajo.prod.reuters.tv/rest/v2/playlist/assets/57630,163881,163829,574… #EXT-X-STREAM-INF:BANDWIDTH=113300,CODECS="mp4a.40.2",SUBTITLES="subs" https://ajo.prod.reuters.tv/rest/v2/playlist/assets/57630,163881,163829,574… }}} WebVTT asset manifest: {{{ #EXTM3U #EXT-X-VERSION:4 #EXT-X-TARGETDURATION:96 #EXTINF:5.5666, no desc https://ajo.prod.reuters.tv/rest/v2/captions/vtt/asset/57630 #EXT-X-DISCONTINUITY #EXTINF:4.4, no desc https://ajo.prod.reuters.tv/rest/v2/captions/vtt/asset/163881 #EXT-X-DISCONTINUITY #EXTINF:4.9667, no desc https://ajo.prod.reuters.tv/rest/v2/captions/vtt/asset/163829 #EXT-X-DISCONTINUITY #EXTINF:4.6333, no desc https://ajo.prod.reuters.tv/rest/v2/captions/vtt/asset/57447 #EXT-X-DISCONTINUITY #EXTINF:2.3, no desc https://ajo.prod.reuters.tv/rest/v2/captions/vtt/asset/127691 #EXT-X-DISCONTINUITY #EXTINF:2.3, no desc https://ajo.prod.reuters.tv/rest/v2/captions/vtt/asset/127676 #EXT-X-DISCONTINUITY #EXTINF:65.2, no desc https://ajo.prod.reuters.tv/rest/v2/captions/vtt/asset/163830 #EXT-X-DISCONTINUITY #EXTINF:2.3, no desc https://ajo.prod.reuters.tv/rest/v2/captions/vtt/asset/127649 #EXT-X-DISCONTINUITY #EXTINF:95.7, no desc https://ajo.prod.reuters.tv/rest/v2/captions/vtt/asset/163855 #EXT-X-DISCONTINUITY #EXTINF:5.0, no desc https://ajo.prod.reuters.tv/rest/v2/captions/vtt/asset/57635 #EXT-X-ENDLIST }}} Sample WebVTT blob: {{{ WEBVTT X-TIMESTAMP-MAP=MPEGTS:900000,LOCAL:00:00:00.000 1 00:00:00.370 --> 00:00:01.700 line:-3 You're watching Reuters TV. 2 00:00:02.790 --> 00:00:04.270 line:-3 Here are your top stories. }}} FFmpeg input report: {{{ Input #0, hls,applehttp, from 'https://ajo.prod.reuters.tv/rest/v2/xato/playlist/assets/57630,163881,16382…': Duration: 00:03:12.37, start: 10.000000, bitrate: N/A Program 0 Metadata: variant_bitrate : 360800 Stream #0:0: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp Metadata: variant_bitrate : 360800 Stream #0:1: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 320x180 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 60 tbc Metadata: variant_bitrate : 360800 Program 1 Metadata: variant_bitrate : 499400 Stream #0:2: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp Metadata: variant_bitrate : 499400 Stream #0:3: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 512x288 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 60 tbc Metadata: variant_bitrate : 499400 Program 2 Metadata: variant_bitrate : 984500 Stream #0:4: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp Metadata: variant_bitrate : 984500 Stream #0:5: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 60 tbc Metadata: variant_bitrate : 984500 Program 3 Metadata: variant_bitrate : 1490500 Stream #0:6: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp Metadata: variant_bitrate : 1490500 Stream #0:7: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 854x480 [SAR 1280:1281 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 60 tbc Metadata: variant_bitrate : 1490500 Program 4 Metadata: variant_bitrate : 2006400 Stream #0:8: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp Metadata: variant_bitrate : 2006400 Stream #0:9: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 960x540 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 60 tbc Metadata: variant_bitrate : 2006400 Program 5 Metadata: variant_bitrate : 3020600 Stream #0:10: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp Metadata: variant_bitrate : 3020600 Stream #0:11: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1024x576 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 60 tbc Metadata: variant_bitrate : 3020600 Program 6 Metadata: variant_bitrate : 4021600 Stream #0:12: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp Metadata: variant_bitrate : 4021600 Stream #0:13: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 60 tbc Metadata: variant_bitrate : 4021600 Program 7 Metadata: variant_bitrate : 4998400 Stream #0:14: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp Metadata: variant_bitrate : 4998400 Stream #0:15: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 60 tbc Metadata: variant_bitrate : 4998400 Program 8 Metadata: variant_bitrate : 113300 Stream #0:16: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp Metadata: variant_bitrate : 113300 }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/7337> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#4448(avformat:new): Properly support cover art in ogg
by FFmpeg 22 May '25

22 May '25

#4448: Properly support cover art in ogg --------------------------------------+---------------------------------- Reporter: llogan | Owner: Type: defect | Status: new Priority: normal | Component: avformat Version: git-master | Keywords: ogg Blocked By: | Blocking: Reproduced by developer: 0 | Analyzed by developer: 0 --------------------------------------+---------------------------------- {{{ $ ./ffmpeg -i ../fate-suite/cover_art/cover_art.flac ../out.ogg ffmpeg version N-71319-g43b4342 Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.9.2 (GCC) 20150304 (prerelease) configuration: --enable-gpl --disable-doc libavutil 54. 22.100 / 54. 22.100 libavcodec 56. 34.100 / 56. 34.100 libavformat 56. 29.100 / 56. 29.100 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 13.101 / 5. 13.101 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Input #0, flac, from '../fate-suite/cover_art/cover_art.flac': Metadata: RATING : 0 ALBUM : Ангелофрения ARTIST : Мельница TITLE : Дороги TRACKTOTAL : 11 TOTALTRACKS : 11 GENRE : Folk DATE : 2012 track : 2 Duration: 00:03:09.05, start: 0.000000, bitrate: 1 kb/s Stream #0:0: Audio: flac, 44100 Hz, stereo, s16 Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 350x350 [SAR 1:1 DAR 1:1], 90k tbr, 90k tbn, 90k tbc Metadata: comment : Other Output #0, ogg, to '../out.ogg': Metadata: RATING : 0 ALBUM : Ангелофрения ARTIST : Мельница TITLE : Дороги TRACKTOTAL : 11 TOTALTRACKS : 11 GENRE : Folk DATE : 2012 track : 2 Stream #0:0: Video: theora, none, q=2-31, 128 kb/s Metadata: comment : Other Stream #0:1: Audio: flac, 0 channels, 128 kb/s Stream mapping: Stream #0:1 -> #0:0 (mjpeg (native) -> ? (?)) Stream #0:0 -> #0:1 (flac (native) -> flac (native)) Encoder (codec theora) not found for output stream #0:0 }}} Of course if Theora is supported by the build then a Theora video stream will be outputted (90k frame rate in this case). Possibly related to #4442 since I assume the cover art mechanics would be similar: https://wiki.xiph.org/VorbisComment#Cover_art -- Ticket URL: <https://trac.ffmpeg.org/ticket/4448> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#9285(avcodec:new): Excessive GPU memory usage with nvdec hwaccel
by FFmpeg 20 May '25

20 May '25

#9285: Excessive GPU memory usage with nvdec hwaccel -------------------------------------+------------------------------------- Reporter: Ridley | Type: defect Combs | Status: new | Priority: normal Component: avcodec | Version: Keywords: nvdec | unspecified nvidia | Blocked By: Blocking: | Reproduced by developer: 1 Analyzed by developer: 1 | -------------------------------------+------------------------------------- When decoding video using the CUDA hwaccel, `ff_nvdec_decode_init()` sets both `ulNumDecodeSurfaces` and `ulNumOutputSurfaces` to `frames_ctx->initial_pool_size`, which in turn is set by `ff_nvdec_decode_init` to `dpb_size + 2`, which in turn has 3 added by `ff_decode_get_hw_frames_ctx()` and `extra_hw_frames` + `thread_count` added by `avcodec_get_hw_frames_parameters`. This is excessive. Only `ulNumDecodeSurfaces` needs additional frames based on thread count (the output surfaces are only used in `nvdec_retrieve_data`, which runs on the consumer's single thread), while only `ulNumOutputSurfaces` needs the 3 additional output frames from `ff_decode_get_hw_frames_ctx()` or the ones from `extra_hw_frames` (the decode surfaces are never exposed to the consumer). I'm not sure what the best way to handle this is. Maybe nvdec should ignore what the generic code sets `initial_pool_size` to altogether and instead calculate its buffer counts internally, duplicating the generic code's behavior only where appropriate? The `initial_pool_size` value seems to be designed for systems where the decoder's internal buffered frames are returned directly to the user, but that's not the case here. Additionally, it doesn't seem like multithreading in CUDA actually serves any purpose; I see no performance gain when using multiple threads vs 1. Is it useful with any hardware decoder? Should we be defaulting multithreading off when using a hwaccel, or forcing it off unless the hwaccel fails and software fallback occurs? This can result in some pretty hefty memory usage for no reason by default on many-core machines. -- Ticket URL: <https://trac.ffmpeg.org/ticket/9285> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#9020(avformat:new): http BUFFER_SIZE too small
by FFmpeg 18 May '25

18 May '25

#9020: http BUFFER_SIZE too small ----------------------------------+--------------------------------------- Reporter: jtojnar | Type: defect Status: new | Priority: normal Component: avformat | Version: unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | ----------------------------------+--------------------------------------- Summary of the bug: When making a HTTP request with a large authorization cookie, the execution fails with “overlong headers” error. The limit was increased to 8192 bytes in https://github.com/FFmpeg/FFmpeg/commit/d29c42974487d5fa0a5c1b05a09da5c5818… (part of ffmpeg 4.3.1) but that is still not enough for authorization headers required for downloading videos from Microsoft Stream (the cookie header alone is almost 8kiB). How to reproduce: {{{ $ ffmpeg -headers "Cookie: Authorization_Api=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX%XX%XX; Signature_Api=XX%XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX%XXXXXXXX%XXXX; UserSession_Api=XXXXXXXXX=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX&XXXXXXX=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX; Authorization=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX%XX%XX; Signature=XX%XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX%XXXXXXXX%XXXX; Extra- dummy-data-representing-the-rest-of-headers: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX; XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" -i "http://example.com/" ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9.3.0 (GCC) configuration: --disable-static --prefix=/nix/store /n77nwda6g2b9iaxxwk8mdzardxzgz7dl-ffmpeg-4.3.1 --arch=x86_64 --target_os=linux --enable-gpl --enable-version3 --enable-shared --enable- pic --enable-runtime-cpudetect --enable-hardcoded-tables --enable-pthreads --disable-w32threads --disable-os2threads --enable-network --enable- pixelutils --enable-ffmpeg --disable-ffplay --enable-ffprobe --enable- avcodec --enable-avdevice --enable-avfilter --enable-avformat --enable- avresample --enable-avutil --enable-postproc --enable-swresample --enable- swscale --disable-doc --enable-libass --enable-bzlib --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libmp3lame --enable- iconv --enable-libtheora --enable-libssh --enable-vaapi --enable-libdrm --enable-vdpau --enable-libvorbis --enable-libvpx --enable-lzma --disable- opengl --disable-libmfx --disable-libaom --enable-libpulse --enable-sdl2 --enable-libsoxr --enable-libx264 --enable-libxvid --enable-zlib --enable- libopus --enable-libspeex --enable-libx265 --enable-libdav1d --disable- debug --enable-optimizations --disable-extra-warnings --disable-stripping libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100 [http @ 0x1f7e480] No trailing CRLF found in HTTP header. Adding it. [http @ 0x1f7e480] overlong headers http://example.com/: Invalid argument }}} I managed to fix it locally by patching ffmpeg with a bigger buffer size (https://github.com/ytdl-org/youtube-dl/pull/24649#issuecomment-738002126) but ideally, ffmpeg would use dynamic allocation for the headers. -- Ticket URL: <https://trac.ffmpeg.org/ticket/9020> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#9408(undetermined:new): WASAPI Audio Input/Output Support
by FFmpeg 09 May '25

09 May '25

#9408: WASAPI Audio Input/Output Support -------------------------------------+------------------------------------- Reporter: Brad Isbell | Type: | enhancement Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- The Windows Audio Session API (WASAPI) is a modern API for audio playback/capture under Windows. It offers several benefits over the current DirectShow implementation in FFmpeg: - [https://docs.microsoft.com/en-us/windows/win32/api/mmreg/ns-mmreg- waveformatextensible Multi-channel support] - [https://docs.microsoft.com/en-us/windows/win32/coreaudio/loopback- recording Loopback capture], for both entire output devices and for individual streams from applications - [https://docs.microsoft.com/en-us/windows/win32/api/audioclient/nf- audioclient-iaudioclient-initialize Low-latency I/O] without the need for proprietary ASIO - [https://docs.microsoft.com/en-us/windows/win32/coreaudio/exclusive- mode-streams Exclusive mode] for further reducing latency == Sample Usage == Capture from multichannel soundcard: {{{ ffmpeg -f wasapi -ar 96000 -ac 8 -i device="My Multichannel Soundcard" … }}} Capture in exclusive mode from soundcard named 'Soundcard': {{{ ffmpeg -f wasapi -exclusive_mode true -i device="Soundcard" … }}} Capture loopback from soundcard named 'Soundcard': {{{ ffmpeg -f wasapi -i loopback_device="Soundcard" … }}} Capture loopback from entire system: {{{ ffmpeg -f wasapi -i loopback_system=true … }}} Capture loopback from app by name or PID: {{{ ffmpeg -f wasapi -i loopback_application_pid=54321 … ffmpeg -f wasapi -i loopback_application_name="Skifree" … }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/9408> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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