[FFmpeg-trac] #9649(undetermined:closed): filter_complex drops per-stream metadata

[FFmpeg]

#9649: filter_complex drops per-stream metadata
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             Reporter:  Arnon        |                    Owner:  (none)
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  4.4.1        |               Resolution:  invalid
             Keywords:               |               Blocked By:
  filter_complex metadata            |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Michael Koch):

 Replying to [comment:1 Nicolas George]:
 > The point of `-filter_complex` is that there is no 1:1 map between input
 and output. Therefore there is no map to decide which metadata to copy.
 Therefore, not copying metadata unless explicitly specified is the
 expected behavior.

 What's the command for explicitly copying metadata? It was already said
 that adding -map_metadata 0 doesn't fix the problem.

 Michael
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Ticket URL: <https://trac.ffmpeg.org/ticket/9649#comment:2>
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