[mythtv-commits] Ticket #13532: Slow drift in a/v sync on non-nVidia system

[MythTV]

#13532: Slow drift in a/v sync on non-nVidia system
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 Reporter:  jpilk                 |          Owner:  (none)
     Type:  Bug Report - General  |         Status:  new
 Priority:  minor                 |      Milestone:  needs_triage
Component:  MythTV - General      |        Version:  Master Head
 Severity:  medium                |     Resolution:
 Keywords:  a/v sync              |  Ticket locked:  0
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Comment (by jpilk):

 I have no doubt that the recent commits are improvements, but I'm still
 seeing drift in the no-nVidia system; around 1200 ms over a recent "Peston
 v Johnson" debate with lots of lip movement.  It may not be the most
 technically stable of sources.  Now the drift does seem to come in bursts
 of "dropping frame to catch up, lateness 30 to 50 ms" with other sequences
 in which the audio is reported to be ahead by around 20 ms and I detect no
 drift.

 The display is in a framed window in a KDE-Plasma desktop.  xrandr 74.98,
 AVSync2 1 ms

 I have just noticed the "MythXOpenDisplay() failed" - and the line below
 it.

 {{{

 2019-12-07 15:16:26.169352 C  mythfrontend version: HEAD -> master [v31
 -Pre-19e3f36156b] www.mythtv.org
 2019-12-07 15:16:26.169363 C  Qt version: compile: 5.9.7, runtime: 5.9.7

 2019-12-07 15:16:28.213192 I  Display: Found screen 'VGA1'
 2019-12-07 15:16:28.213223 I  Display: Using screen 'VGA1' (Make: Unknown
 Model: Unknown)
 2019-12-07 15:16:28.213255 I  Display: Geometry 1440x900+0+0 Size
 410mmx260mm
 2019-12-07 15:16:28.213319 C  MythXOpenDisplay() failed
 2019-12-07 15:16:28.213339 N  Display: Desktop video mode: 0x0
 -1000000.000 Hz

 2019-12-07 15:16:33.649756 I  Display: Available modes:
 2019-12-07 15:16:33.649779 I  1440x900  74.98   59.89
 2019-12-07 15:16:33.649788 I  1280x1024 75.02   60.02

 }}}

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Ticket URL: <https://code.mythtv.org/trac/ticket/13532#comment:1>
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