[FFmpeg-trac] #4954(avformat:open): Joint Stereo indicator missing from MP3 headers (was: joint stereo indicator missing from mp3 headers)

[FFmpeg]

#4954: Joint Stereo indicator missing from MP3 headers
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             Reporter:  pico4743    |                    Owner:  (none)
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  mp3         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  1           |
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Changes (by MasterQuestionable):

 * analyzed:  0 => 1
 * cc: MasterQuestionable (added)
 * summary:  joint stereo indicator missing from mp3 headers => Joint Stereo
     indicator missing from MP3 headers

Comment:

 ͏    Synthesis:
 ͏
 https://github.com/FFmpeg/FFmpeg/blob/790f793844390ece526ff654dc1bdddff5f5b4e8/libavformat/mp3enc.c#L180-L186
 ͏
 https://github.com/FFmpeg/FFmpeg/blob/4614bf2caf67a89c2d833b3368f325eab54582bc/libavcodec/mpegaudio.h#L46-L49

 ͏    A further branching (of channels count 2) needed for the case of
 Joint Stereo. (that indicated from the exact encoders?)
 ͏    FFmpeg seems to support quite many MP3 encoders...
 ͏    (besides "libmp3lame", what supports Joint Stereo?)
 ͏    .
 ͏    I don't directly use MP3 mostly... so no idea.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/4954#comment:16>
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