[FFmpeg-trac] #6508(undetermined:new): FFmpeg fails to detect embedded artwork in ALAC

[FFmpeg]

#6508: FFmpeg fails to detect embedded artwork in ALAC
-------------------------------------+-------------------------------------
             Reporter:  macdavis     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  ALAC         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe175002600] Unknown cover type: 0x0.

 How to reproduce:
 {{{
  ffmpeg -i /Users/davisdai/sample.m4a -f null -
 ffmpeg version 3.3.git Copyright (c) 2000-2017 the FFmpeg developers
   built with Apple LLVM version 8.1.0 (clang-802.0.42)
   configuration: --optflags=-Ofast --prefix=/usr/local --extra-
 cflags='-march=haswell -mtune=intel -m64 -minline-all-stringops -fomit-
 frame-pointer -fforce-addr -finline-functions -funit-at-a-time -funroll-
 loops -ffunction-sections -fdata-sections -Ofast -pipe -fomit-frame-
 pointer -ftree-vectorize' --target-os=darwin --arch=x86_64 --cpu=haswell
 --disable-runtime-cpudetect --disable-debug --disable-opencl --disable-
 avdevice --disable-ffplay --disable-ffprobe --disable-postproc --disable-
 ffserver --disable-devices --disable-avresample --disable-indev=qtkit
 --disable-doc --enable-pthreads --enable-version3 --enable-hardcoded-
 tables --enable-gpl --enable-nonfree
   libavutil      55. 67.100 / 55. 67.100
   libavcodec     57.100.103 / 57.100.103
   libavformat    57. 75.100 / 57. 75.100
   libavfilter     6. 94.100 /  6. 94.100
   libswscale      4.  7.101 /  4.  7.101
   libswresample   2.  8.100 /  2.  8.100
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fe175002600] Unknown cover type: 0x0.
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/davisdai/sample.m4a':
   Metadata:
     major_brand     : M4A
     minor_version   : 512
     compatible_brands: isomiso2
     ©cpy           : ℗ 1998 Acoustic Lab
     title           : 心債
     artist          : 夏韶聲
     album_artist    : 夏韶聲
     album           : 諳 HDCD
     genre           : 粵語樂
     date            : 1998-12-01
     track           : 3/10
     disc            : 1/1
     encoder         : Lavf57.75.100
     gapless_playback: 0
   Duration: 00:00:05.02, start: 0.000000, bitrate: 1613 kb/s
     Stream #0:0(und): Audio: alac (alac / 0x63616C61), 44100 Hz, stereo,
 s32p (20 bit), 935 kb/s (default)
     Metadata:
       handler_name    : SoundHandler
 Stream mapping:
   Stream #0:0 -> #0:0 (alac (native) -> pcm_s16le (native))
 Press [q] to stop, [?] for help
 Output #0, null, to 'pipe:':
   Metadata:
     major_brand     : M4A
     minor_version   : 512
     compatible_brands: isomiso2
     ©cpy           : ℗ 1998 Acoustic Lab
     title           : 心債
     artist          : 夏韶聲
     album_artist    : 夏韶聲
     album           : 諳 HDCD
     genre           : 粵語樂
     date            : 1998-12-01
     track           : 3/10
     disc            : 1/1
     gapless_playback: 0
     encoder         : Lavf57.75.100
     Stream #0:0(und): Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
 (default)
     Metadata:
       handler_name    : SoundHandler
       encoder         : Lavc57.100.103 pcm_s16le
 size=N/A time=00:00:05.01 bitrate=N/A speed= 891x
 video:0kB audio:864kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6508>
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