[FFmpeg-trac] #11462(undetermined:new): Cannot embed .scc file into .mp4 using -c:s copy

[FFmpeg]

#11462: Cannot embed .scc file into .mp4 using -c:s copy
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             Reporter:  Zach         |                    Owner:  (none)
                 Type:  enhancement  |                   Status:  new
             Priority:  important    |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Zach):

 Replying to [comment:1 Marth64]:
 > It is not possible in this way.
 > Closed Caption bytes are embedded into the video stream's SEI bytes or
 user data, so a stream copy will not achieve a presentable result (also I
 do not believe MP4 can house a discrete EIA608 stream, not that it would
 be useful). Likely this will have to be a BSF filter.

 I don't know what exact mechanism is required, but I do know it is
 possible to embed 608 captions into the user data of an mp4 file.  I have
 provided links to such files with issue #11461 that can be referenced.  I
 used the term copy because I want to preserve and copy the 608 data.  I
 would expect such a bitstream filter to align the captions codes with
 their respective frames via timecode and present the new video stream to
 next part of the code.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11462#comment:2>
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