[FFmpeg-trac] #8620(avdevice:open): Fundamental bug in DirectShow capture - wrong timestamps

[FFmpeg]

#8620: Fundamental bug in DirectShow capture - wrong timestamps
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             Reporter:  Dmitry       |                    Owner:  (none)
  Sinitsyn                           |
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  avdevice
              Version:  unspecified  |               Resolution:
             Keywords:  dshow dts    |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Balling):

 Replying to [comment:20 Dmitry Sinitsyn]:
 > Timestamp generated by DirectShow source filter for each its media
 sample.

 Do you know what Variable Framerate is? It is when time difference between
 frames are not the same. Now, the fps reported from stream info means
 constant framerate. After PTS will be read, the framerate can be no longer
 constant. You can record stream and check for yourself with
 {{{
 ffmpeg -i video -vf vfrdet -an -f null -
 }}}


 >But current workaround for this case is OK for me.

 Well, there may be some meaning to those PTS. Like some kind of SMPTE
 timecode or something like that. Metadata?
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/8620#comment:21>
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