[FFmpeg-trac] #10454(undetermined:new): Unable to remux AV1 stream from MKV to MKV

[FFmpeg]

#10454: Unable to remux AV1 stream from MKV to MKV
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             Reporter:  mysterious   |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  6.0          |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by mkver):

 The parser does not see any keyframes in your input (although the first
 packet is marked as keyframe in your input sample on the container level);
 because all input before the first keyframe is discarded by default, all
 input is discarded.

 The sample in question contains a frame header indicating a key frame
 followed by a Tile Group containing a frame header indicating an inter
 frame. Because of the latter, the parser flags the packet as non-keyframe.

 You can use -copyinkf (output option) or -fflags +noparse (input option)
 as a workaround.
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Ticket URL: <https://trac.ffmpeg.org/ticket/10454#comment:1>
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