[FFmpeg-trac] #5847(undetermined:closed): Duration estimate and bitrate calculation wrong when file is over 4Gb

FFmpeg trac at avcodec.org
Tue Sep 20 02:06:08 EEST 2016


#5847: Duration estimate and bitrate calculation wrong when file is over 4Gb
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             Reporter:  petere       |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:  mpegps       |               Resolution:  duplicate
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by petere):

 Yes I tested with analyzeduration and it took a long time but still did
 not get the correct duration or bitrate.  Upon further investigation it
 looks like the timestamps reset in vob 5 so the duration is correct in
 vobs 1, 2, 3, and 4 but 5 starts at 0 again.  So if ffmpeg reads the
 timestamps from the end of the file they will be less than the start and
 the duration and bitrate will be incorrect.

 I tried using the separate vobs and the concat: input but this does not
 use analyzeduration so it does not find all the subtitles when I use
 filter complex to burn subtitles.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5847#comment:7>
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