[FFmpeg-trac] #5152(undetermined:reopened): Broken B frames while copying MPEG-2 ibp without recompression from some point
FFmpeg
trac at avcodec.org
Tue Jan 12 14:07:55 CET 2016
#5152: Broken B frames while copying MPEG-2 ibp without recompression from some
point
-------------------------------------+-------------------------------------
Reporter: | Owner:
Aleksandr_Slobodeniuk | Status: reopened
Type: defect | Component:
Priority: normal | undetermined
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by Aleksandr_Slobodeniuk):
1) result must be from 3:00 to 3:24
2) if you type (it's 25 frames)
{{{
ffmpeg -i result.mov %d.jpg
}}}
you'll see that
- first 11 frames show 3:11 (because ffmpeg can't decode 11 b frames
because they are from the middle of the gop)
- last 2 frames show 3:24 and 4:01 , 4:00 is missing (because it was not
read. 4:01 is I frame that goes before 4:00 in the file, and it was pulled
out with nullptr to avcodec_decode_video)
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5152#comment:12>
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