[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 Dmitry Sinitsyn):

 Replying to [comment:21 Balling]:
 > Do you know what Variable Framerate is?

 Sure I know. Why don't you answer my question? We are talking about libav
 PTS acquiring from DirectShow. Why are you talking about framerate?
 Correct PTS is especially important for variable framerate. And upstream
 filter knows this(must know) so it assigns correct timestamps to media
 samples. Thus we should just get them.

 > >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?
 Most likely it is a bad capture filter. Timestamp can be valid or absent.
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Ticket URL: <https://trac.ffmpeg.org/ticket/8620#comment:22>
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