[FFmpeg-trac] #7879(undetermined:open): Header missing when decoding mp3 to wav / Lyrics3 tag problem (was: Header missing when decoding mp3 to wav)

[FFmpeg]

#7879: Header missing when decoding mp3 to wav / Lyrics3 tag problem
-------------------------------------+-------------------------------------
             Reporter:  hendrik      |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  4.1          |               Resolution:
             Keywords:  mp3 Lyrics3  |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by Moonbase59):

 * cc: mhormann@… (added)
 * status:  new => open


Comment:

 I have the same problem here, using either ffmpeg or loudgain
 (https://github.com/Moonbase59/loudgain/issues/11) which uses ffmpeg
 libraries like libavformat.

 All my testing shows that ffmpeg apparently doesn’t understand ''Lyrics3''
 tags, assumes these are still audio data, and fails. In MP3 files, Lyrics3
 tags are always just behind the audio data, and before a possible
 ID3v1/ID3v1.1 tag.

 When leaving the audio and other tags intact and just removing the Lyrics3
 tag on the same file, it can be decoded flawlessly and without error.

 I know Lyrics3 tags are quite seldom used but still think ffmpeg should
 detect them and not try to decode as audio samples.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7879#comment:2>
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