[FFmpeg-trac] #3678(avcodec:new): Regressions in the video duration/bitrate report

FFmpeg trac at avcodec.org
Wed May 28 11:12:50 CEST 2014

#3678: Regressions in the video duration/bitrate report
             Reporter:  Malizor     |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |

Comment (by cehoyos):

 Replying to [comment:2 Malizor]:
 > Replying to [comment:1 cehoyos]:
 > > Replying to [ticket:3678 Malizor]:
 > > > {{{
 > > > Duration: 00:00:00.16, start: 0.000000, bitrate: 52428 kb/s
 > > > }}}
 > >
 > > Do you believe that this value is correct?
 > Yes.

 > The full video file is 40G and is 1h 26mn long.

 Does this really imply ~50Mb/s? Doesn't sound correct to me.
 How does old {{{ffmpeg -i}}} look for your complete 40G sample?

 > New versions of ffmpeg detect it as being 9h 48m long

 And a warning is shown that this value is maybe incorrect.

 > I understand what you say about the bitrate, but it's sure that it is
 truly higher than the detected 9118 kb/s.

 Of course.
 The bitrate of the file is unknown / wrong because the video stream
 doesn't store a bitrate.

Ticket URL: <https://trac.ffmpeg.org/ticket/3678#comment:3>
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