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

FFmpeg trac at avcodec.org
Wed May 28 10:36:30 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 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?


 > > {{{
 > > Stream #0:0: Video: mpeg2video (4:2:2), yuv422p, 720x608 [SAR 152:135
 DAR 4:3], 50000 kb/s
 > > }}}
 > Showing a bitrate for a mpegvideo stream was assumed to be wrong (there
 is no bitrate written in the stream), this is why {{{max. 50000 kb/s}}} is
 shown now. Do you have any indication that the change was wrong?

 The full video file is 40G and is 1h 26mn long. New versions of ffmpeg
 detect it as being 9h 48m long with the very low bitrate that can still be
 seen with the attached sample.

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

 Also, as an additional test, I noticed that mediainfo also return the
 right metadata.

Ticket URL: <https://trac.ffmpeg.org/ticket/3678#comment:2>
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