[FFmpeg-trac] #10506(undetermined:new): FFmpeg fails to decode MKV attachment without an extra step of -dump_attachment
FFmpeg
trac at avcodec.org
Sat Aug 5 13:58:11 EEST 2023
#10506: FFmpeg fails to decode MKV attachment without an extra step of
-dump_attachment
-------------------------------------+-------------------------------------
Reporter: Sun_Serega | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
I want to extract and immediately convert the "cover.webp" attachment to a
BMP file.
It works if I first dump all attachments and then convert the needed one.
---
How to reproduce:
In my case the files with attachments are created with yt-dlp, for
instance:
{{{
yt-dlp.exe -o 0.mkv --embed-thumbnail --merge-output-format mkv
https://youtu.be/VQjKO5dEgBA
}}}
Trying to get info about the created "0.mkv" file:
{{{
ffprobe -analyzeduration "200M" -probesize "200M" -i 0.mkv
ffprobe version 2023-07-19-git-efa6cec759-full_build-www.gyan.dev
Copyright (c) 2007-2023 the FFmpeg developers
built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-
w32threads --disable-autodetect --enable-fontconfig --enable-iconv
--enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma
--enable-libsnappy --enable-zlib --enable-librist --enable-libsrt
--enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray
--enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption
--enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi
--enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom
--enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-
mediafoundation --enable-libass --enable-frei0r --enable-libfreetype
--enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-
libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-
llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc
--enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc
--enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio
--enable-libgme --enable-libmodplug --enable-libopenmpt --enable-
libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora
--enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-
libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus
--enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b
--enable-libflite --enable-libmysofa --enable-librubberband --enable-
libsoxr --enable-chromaprint
libavutil 58. 14.100 / 58. 14.100
libavcodec 60. 22.100 / 60. 22.100
libavformat 60. 10.100 / 60. 10.100
libavdevice 60. 2.101 / 60. 2.101
libavfilter 9. 8.102 / 9. 8.102
libswscale 7. 3.100 / 7. 3.100
libswresample 4. 11.100 / 4. 11.100
libpostproc 57. 2.100 / 57. 2.100
[matroska,webm @ 00000233b5e07400] Could not find codec parameters for
stream 2 (Attachment: none): unknown codec
Consider increasing the value for the 'analyzeduration' (200000000) and
'probesize' (200000000) options
Input #0, matroska,webm, from '0.mkv':
Metadata:
ENCODER : Lavf60.10.100
Duration: 00:00:56.49, start: 0.000000, bitrate: 2200 kb/s
Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709), 1920x1080,
SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 1k tbn (default)
Metadata:
DURATION : 00:00:56.456000000
Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
Metadata:
DURATION : 00:00:56.488000000
Stream #0:2: Attachment: none
Metadata:
filename : cover.webp
mimetype : image/webp
Unsupported codec with id 0 for input stream 2
}}}
Or to extract the second stream directly:
{{{
ffmpeg -i 0.mkv -map 0:2 0.webp
ffmpeg version 2023-07-19-git-efa6cec759-full_build-www.gyan.dev Copyright
(c) 2000-2023 the FFmpeg developers
built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-
w32threads --disable-autodetect --enable-fontconfig --enable-iconv
--enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma
--enable-libsnappy --enable-zlib --enable-librist --enable-libsrt
--enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray
--enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption
--enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi
--enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom
--enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-
mediafoundation --enable-libass --enable-frei0r --enable-libfreetype
--enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-
libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-
llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc
--enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc
--enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio
--enable-libgme --enable-libmodplug --enable-libopenmpt --enable-
libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora
--enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-
libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus
--enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b
--enable-libflite --enable-libmysofa --enable-librubberband --enable-
libsoxr --enable-chromaprint
libavutil 58. 14.100 / 58. 14.100
libavcodec 60. 22.100 / 60. 22.100
libavformat 60. 10.100 / 60. 10.100
libavdevice 60. 2.101 / 60. 2.101
libavfilter 9. 8.102 / 9. 8.102
libswscale 7. 3.100 / 7. 3.100
libswresample 4. 11.100 / 4. 11.100
libpostproc 57. 2.100 / 57. 2.100
[matroska,webm @ 0000028a8c1517c0] Could not find codec parameters for
stream 2 (Attachment: none): unknown codec
Consider increasing the value for the 'analyzeduration' (0) and
'probesize' (5000000) options
Input #0, matroska,webm, from '0.mkv':
Metadata:
ENCODER : Lavf60.10.100
Duration: 00:00:56.49, start: 0.000000, bitrate: 2200 kb/s
Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709), 1920x1080,
SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 1k tbn (default)
Metadata:
DURATION : 00:00:56.456000000
Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
Metadata:
DURATION : 00:00:56.488000000
Stream #0:2: Attachment: none
Metadata:
filename : cover.webp
mimetype : image/webp
[webp @ 0000028a8c18d540] Only WebP is supported
[out#0/webp @ 0000028a8ca3cec0] Could not write header (incorrect codec
parameters ?): Invalid argument
Error opening output file 0.webp.
Error opening output files: Invalid argument
}}}
{{{
ffmpeg -i 0.mkv -map 0:2 0.bmp
ffmpeg version 2023-07-19-git-efa6cec759-full_build-www.gyan.dev Copyright
(c) 2000-2023 the FFmpeg developers
built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-
w32threads --disable-autodetect --enable-fontconfig --enable-iconv
--enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma
--enable-libsnappy --enable-zlib --enable-librist --enable-libsrt
--enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray
--enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption
--enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi
--enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom
--enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-
mediafoundation --enable-libass --enable-frei0r --enable-libfreetype
--enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-
libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-
llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc
--enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc
--enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio
--enable-libgme --enable-libmodplug --enable-libopenmpt --enable-
libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora
--enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-
libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus
--enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b
--enable-libflite --enable-libmysofa --enable-librubberband --enable-
libsoxr --enable-chromaprint
libavutil 58. 14.100 / 58. 14.100
libavcodec 60. 22.100 / 60. 22.100
libavformat 60. 10.100 / 60. 10.100
libavdevice 60. 2.101 / 60. 2.101
libavfilter 9. 8.102 / 9. 8.102
libswscale 7. 3.100 / 7. 3.100
libswresample 4. 11.100 / 4. 11.100
libpostproc 57. 2.100 / 57. 2.100
[matroska,webm @ 000002455fd517c0] Could not find codec parameters for
stream 2 (Attachment: none): unknown codec
Consider increasing the value for the 'analyzeduration' (0) and
'probesize' (5000000) options
Input #0, matroska,webm, from '0.mkv':
Metadata:
ENCODER : Lavf60.10.100
Duration: 00:00:56.49, start: 0.000000, bitrate: 2200 kb/s
Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709), 1920x1080,
SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 1k tbn (default)
Metadata:
DURATION : 00:00:56.456000000
Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
Metadata:
DURATION : 00:00:56.488000000
Stream #0:2: Attachment: none
Metadata:
filename : cover.webp
mimetype : image/webp
Output #0, image2, to '0.bmp':
Metadata:
encoder : Lavf60.10.100
Stream #0:0: Attachment: none
Metadata:
filename : cover.webp
mimetype : image/webp
Stream mapping:
Stream #0:2 -> #0:0 (copy)
Press [q] to stop, [?] for help
[out#0/image2 @ 000002456064cec0] video:0kB audio:0kB subtitle:0kB other
streams:0kB global headers:54kB muxing overhead: unknown
[out#0/image2 @ 000002456064cec0] Output file is empty, nothing was
encoded
size=N/A time=N/A bitrate=N/A speed=N/A
}}}
But if I first dump it:
{{{
ffmpeg -dump_attachment:t "" -i 0.mkv
ffmpeg version 2023-07-19-git-efa6cec759-full_build-www.gyan.dev Copyright
(c) 2000-2023 the FFmpeg developers
built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-
w32threads --disable-autodetect --enable-fontconfig --enable-iconv
--enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma
--enable-libsnappy --enable-zlib --enable-librist --enable-libsrt
--enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray
--enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption
--enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi
--enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom
--enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-
mediafoundation --enable-libass --enable-frei0r --enable-libfreetype
--enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-
libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-
llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc
--enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc
--enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio
--enable-libgme --enable-libmodplug --enable-libopenmpt --enable-
libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora
--enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-
libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus
--enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b
--enable-libflite --enable-libmysofa --enable-librubberband --enable-
libsoxr --enable-chromaprint
libavutil 58. 14.100 / 58. 14.100
libavcodec 60. 22.100 / 60. 22.100
libavformat 60. 10.100 / 60. 10.100
libavdevice 60. 2.101 / 60. 2.101
libavfilter 9. 8.102 / 9. 8.102
libswscale 7. 3.100 / 7. 3.100
libswresample 4. 11.100 / 4. 11.100
libpostproc 57. 2.100 / 57. 2.100
[matroska,webm @ 000002c5d1e6b540] Could not find codec parameters for
stream 2 (Attachment: none): unknown codec
Consider increasing the value for the 'analyzeduration' (0) and
'probesize' (5000000) options
Input #0, matroska,webm, from '0.mkv':
Metadata:
ENCODER : Lavf60.10.100
Duration: 00:00:56.49, start: 0.000000, bitrate: 2200 kb/s
Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709), 1920x1080,
SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 1k tbn (default)
Metadata:
DURATION : 00:00:56.456000000
Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
Metadata:
DURATION : 00:00:56.488000000
Stream #0:2: Attachment: none
Metadata:
filename : cover.webp
mimetype : image/webp
[aist#0:2/none @ 000002c5d25f4680] Wrote attachment (55132 bytes) to
'cover.webp'
At least one output file must be specified
}}}
Now suddenly it can be decoded:
{{{
ffmpeg -i cover.webp 0.bmp
ffmpeg version 2023-07-19-git-efa6cec759-full_build-www.gyan.dev Copyright
(c) 2000-2023 the FFmpeg developers
built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-
w32threads --disable-autodetect --enable-fontconfig --enable-iconv
--enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma
--enable-libsnappy --enable-zlib --enable-librist --enable-libsrt
--enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray
--enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption
--enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi
--enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom
--enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-
mediafoundation --enable-libass --enable-frei0r --enable-libfreetype
--enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-
libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-
llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc
--enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc
--enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio
--enable-libgme --enable-libmodplug --enable-libopenmpt --enable-
libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora
--enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-
libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus
--enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b
--enable-libflite --enable-libmysofa --enable-librubberband --enable-
libsoxr --enable-chromaprint
libavutil 58. 14.100 / 58. 14.100
libavcodec 60. 22.100 / 60. 22.100
libavformat 60. 10.100 / 60. 10.100
libavdevice 60. 2.101 / 60. 2.101
libavfilter 9. 8.102 / 9. 8.102
libswscale 7. 3.100 / 7. 3.100
libswresample 4. 11.100 / 4. 11.100
libpostproc 57. 2.100 / 57. 2.100
Input #0, webp_pipe, from 'cover.webp':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown),
1280x720, 25 fps, 25 tbr, 25 tbn
Stream mapping:
Stream #0:0 -> #0:0 (webp (native) -> bmp (native))
Press [q] to stop, [?] for help
Output #0, image2, to '0.bmp':
Metadata:
encoder : Lavf60.10.100
Stream #0:0: Video: bmp, bgr24(pc, gbr/unknown/unknown, progressive),
1280x720, q=2-31, 200 kb/s, 25 fps, 25 tbn
Metadata:
encoder : Lavc60.22.100 bmp
[image2 @ 000001d812ec6d40] The specified filename '0.bmp' does not
contain an image sequence pattern or a pattern is invalid.
[image2 @ 000001d812ec6d40] Use a pattern such as %03d for an image
sequence or use the -update option (with -frames:v 1 if needed) to write a
single image.
[out#0/image2 @ 000001d8129ee9c0] video:2700kB audio:0kB subtitle:0kB
other streams:0kB global headers:0kB muxing overhead: unknown
frame= 1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed=
0x
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/10506>
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