[FFmpeg-trac] #9579(undetermined:new): "ffmpeg -f concat" fails: Error applying bitstream filters to an output packet for stream #0: Invalid data found when processing input

[FFmpeg]

#9579: "ffmpeg -f concat" fails: Error applying bitstream filters to an output
packet for stream #0: Invalid data found when processing input
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             Reporter:  Yuri         |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Balling):

 Well, you obviously cannot concat AVC and VP9. You need to select youtube-
 dl -F, youtube-dl -f xxx format.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9579#comment:1>
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