[FFmpeg-trac] #8189(ffmpeg:new): FFMPEG fails to trim beginning of clip

[FFmpeg]

#8189: FFMPEG fails to trim beginning of clip
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             Reporter:  mmorin      |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  ffmpeg
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by mmorin):

 I think I understand now. Both samples have non-intra encoding, which
 means that if the data related to a frame exceeds the bitrate, the extra
 bytes will be saved in a "byte reservoir" and added to later frames . In
 the first sample, the outpoint of 5 seconds has an empty byte reservoir
 and the command can exit at that point without having to decode and re-
 encode. In the second sample, the outpoint of 5 seconds has a non-empty
 "byte reservoir", so copying without decoding and re-encoding is forced to
 copy the whole file. Is my understanding correct?

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Ticket URL: <https://trac.ffmpeg.org/ticket/8189#comment:9>
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