[FFmpeg-trac] #9207(undetermined:new): ffmpeg does not copy audio file's cover art when start time in not zero

[FFmpeg]

#9207: ffmpeg does not copy audio file's cover art when start time in not zero
-------------------------------------+-------------------------------------
             Reporter:  zymos        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  cover art,   |               Blocked By:
  id3, start time                    |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 When converting an audio file with cover art in metadata/id3, with the
 start time(-ss) option used.  The cover art is not copied, no matter how
 the the "cover art/video/visual" element is attempted to be copied.
 * -codec copy
 * -c:v copy
 * -c:v png
 * -c:v mjpeg

 I believe this is because the cover art is treated as a single frame of
 video at time zero, and when start time is not zero, there is no video.
 Obviously cover art is not a video stream, but I'm guessing this was done
 as a work around.  But that's only my guess

 How to reproduce:
 {{{
 * Use any audio file with cover art in metadata/id3
 * Convert file with a non-zero start time
 * Audio is copied as expected, metadata is copied as expected, no cover
 art

 % fmpeg -i sample.mp3 -ss 10 -codec copy output-start-at-10-sec.mp3


 ffmpeg version
 ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg
 developers
 built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
 configuration: --prefix=/usr --extra-version=1ubuntu0.1
 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
 --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl
 --disable-stripping --enable-avresample --disable-filter=resample
 --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom
 --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca
 --enable-libcdio --enable-libcodec2 --enable-libflite --enable-
 libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme
 --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa
 --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-
 libpulse --enable-librsvg --enable-librubberband --enable-libshine
 --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh
 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-
 libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-
 libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi
 --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl
 --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883
 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264
 --enable-shared
 libavutil      56. 31.100 / 56. 31.100
 libavcodec     58. 54.100 / 58. 54.100
 libavformat    58. 29.100 / 58. 29.100
 libavdevice    58.  8.100 / 58.  8.100
 libavfilter     7. 57.100 /  7. 57.100
 libavresample   4.  0.  0 /  4.  0.  0
 libswscale      5.  5.100 /  5.  5.100
 libswresample   3.  5.100 /  3.  5.100
 libpostproc    55.  5.100 / 55.  5.100

 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9207>
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