[FFmpeg-trac] #8952(ffmpeg:new): Play but

[FFmpeg]

#8952: Play but
-------------------------------------+-------------------------------------
             Reporter:  Proletarian  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  ffmpeg       |                  Version:
                                     |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 I trying make mkv file from mp4 by this command:
 ffmpeg.exe -i "input.mp4" -vcodec copy "output.mkv"

 I get a working file in the output, but when re-encoding I get the
 following error:
 Opening an input file: input.mp4.
 [NULL @ 00000000005c5940] Opening 'input.mp4' for reading
 [file @ 00000000005c6240] Setting default whitelist 'file,crypto,data'
 [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c5940] Format
 mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
 [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c5940] ISO: File Type Major Brand:
 isom
 [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c5940] Unknown dref type 0x206c7275
 size 12
 [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c5940] Processing st: 0, edit list 0
 - media time: 2090, duration: 24819030
 [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c5940] drop a frame at curr_cts: 0 @
 0
 [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c5940] Unknown dref type 0x206c7275
 size 12
 [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c5940] STSC entry 11872 is invalid
 (first=1 count=1 id=1)
 [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c5940] STSC entry 11871 is invalid
 (first=1 count=1 id=1)
 ......
 [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c5940] STSC entry 1 is invalid
 (first=1 count=1 id=1)
 [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c5940] Before
 avformat_find_stream_info() pos: 15755454 bytes read:340142 seeks:1
 nb_streams:2

 This error slows down transcoding. What is it?

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Ticket URL: <https://trac.ffmpeg.org/ticket/8952>
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