[mythtv-commits] Ticket #13494: Add framerate-based sync setting

MythTV noreply at mythtv.org
Sat Oct 26 21:25:02 UTC 2019

#13494: Add framerate-based sync setting
 Reporter:  madscientist159          |          Owner:  Peter Bennett
     Type:  Patch - Feature          |         Status:  assigned
 Priority:  minor                    |      Milestone:  needs_triage
Component:  MythTV - Video Playback  |        Version:  v29-fixes
 Severity:  low                      |     Resolution:
 Keywords:                           |  Ticket locked:  0

Comment (by madscientist159):

 I've updated the patch to use the output framerate instead of the source
 framerate.  This was messing up my initial analysis since MythTV can
 select 60Hz output rates for 30FPS content.

 It looks like a small static delay (under 100ms) plus 6 frames of delay
 just about handles the A/V sync problem completely when switching from
 24FPS to 60FPS.  I do use the GL renderer, so I wonder if there's some
 extra video buffering in the host stack as well that's contributing to the
 overall delay.

Ticket URL: <https://code.mythtv.org/trac/ticket/13494#comment:4>
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