[FFmpeg-trac] #8631(undetermined:closed): Audio gapless playback metadata for MP4/AAC

FFmpeg trac at avcodec.org
Thu May 21 03:05:49 EEST 2020

#8631: Audio gapless playback metadata for MP4/AAC
             Reporter:               |                    Owner:
  johnkaplantech                     |
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
                                     |  needs_more_info
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by johnkaplantech):

 I did more investigation and found that for re-encoding a flac file into
 MP4/AAC, ffmpeg is producing a moov/edts/elst header with information
 populated that follows the MP4 spec.
 We were using a command-line switch that suppressed the above boxes, which
 -f adts
 ..once we stopped using that the elst box appeared in the output. There is
 a wrinkle in that output that's preventing some players from interpreting
 it correctly, but that's for another thread.

Ticket URL: <https://trac.ffmpeg.org/ticket/8631#comment:2>
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