[FFmpeg-trac] #11423(undetermined:new): Remuxing webm to opus adds silence to opus stream

[FFmpeg]

#11423: Remuxing webm to opus adds silence to opus stream
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             Reporter:  y1dj1sqd     |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  webm opus    |               Blocked By:
  remux                              |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by y1dj1sqd):

 > It is not gapless without a container?

 Idk but I guess the raw stream is not gapless.

 I'm not sure how to test without a container. Do you have a simple
 example?
 Or can you test with the given example above?

 > Inserts priming and remainder.

 Yes I guess it does add this but usually there should be some metadata
 which tells the player to skip those. But I'm no expert so not sure how
 exactly opus does it.

 The only thing I know for now is that the files generated by mkvextract do
 play gapless but the files generated by ffmpeg do not.

 Both add the same "Pre-skip" value to the opus file but only ffmpeg has
 added gaps.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11423#comment:3>
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