[FFmpeg-trac] #7967(avformat:new): ID3v2 comment unsupported

FFmpeg trac at avcodec.org
Fri Jun 21 07:15:15 EEST 2019

#7967: ID3v2 comment unsupported
             Reporter:  bitennui     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avformat     |                  Version:
             Keywords:  id3v2        |  unspecified
  comment                            |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
 Summary of the bug: id3v2enc.c does not encode "comment" metadata using
 ID3v2 tag "COMM", it instead drops though and gets encoded using the
 "TXXX" catch-all. The metadata mapping table in id3v2.c needs to be
 updated with the "COMM" tag for the "comment" key; and
 id3v2_check_write_tag in id3v2enc.c should not expect valid tags to start
 with "T" since "COMM" is an obvious exception to that constraint.
 How to reproduce:
 % ffmpeg-i mp3_with_COMM_id3v2_tag.mp3 -f ffmetadata -c copy -map_metadata
 0 -id3v2_version 3 -write_id3v1 1
 ffmpeg version
 built on ...
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

Ticket URL: <https://trac.ffmpeg.org/ticket/7967>
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