[FFmpeg-trac] #4704(avformat:new): Timecode data not maintained when using mp4 wrapper instead of mov wrapper

[FFmpeg]

#4704: Timecode data not maintained when using mp4 wrapper instead of mov wrapper
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             Reporter:  alan1523     |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avformat
              Version:  unspecified  |               Resolution:
             Keywords:  mov          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by alan1523):

 Yes, indeed it is not standard to have timecode track in mp4 files, there
 is although a Technical note from Apple on how to handle timecode in this
 case. If time permits it would be nice to review the feasibility of this
 implementation.

 https://developer.apple.com/library/mac/technotes/tn2174/_index.html#//apple_ref/doc/uid/DTS40014018-CH1-TNTAG14

 I will see if there are some sample files from Final Cut Pro X with mp4s
 and timecode.

 I also can reach out to the Apple FCPX development team if need be.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4704#comment:3>
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