[FFmpeg-trac] #10855(undetermined:new): Huge RTSP latency achieved over long time of streaming from specific IP camera

[FFmpeg]

#10855: Huge RTSP latency achieved over long time of streaming from specific IP
camera
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             Reporter:  VincasD      |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  6.1          |               Resolution:
             Keywords:  RTSP H264    |               Blocked By:
  latency                            |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Marton Balint):

 FFplay is not really developed to maintain a fixed latency for live
 sources, or to regenerate the clock of the input.

 Typically the clock source for playback is the playback audio clock, which
 just depends on the internal clock of your sound card. This is likely
 slighly different from the local clock of your camera, so in time the
 latency will change.

 You might try using the -sync ext mode, which does some playback clock
 adjustments to keep the buffered data (and therefore latency) constant,
 but it might cause some sudden audio pitch changes.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10855#comment:5>
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