[mythtv-commits] Ticket #13532: Slow drift in a/v sync on non-nVidia system
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Wed Dec 11 20:22:23 UTC 2019
#13532: Slow drift in a/v sync on non-nVidia system
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Reporter: jpilk | Owner: mark-kendall
Type: Bug Report - General | Status: accepted
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):
OK, my "Peston v Johnson" test recording has previously shown serious
lipsync problems in el7. I have just played it again and no a/v drift was
noticeable.
Frame dropping was reported "quite often", particularly when I was
reloading Thunderbird, and CPU load, usually 2 x 85%, seems high for SD.
The log sample below looks as if sensible things are happening. I'm not
sure that the recording does.
Commit 234f34b0
OSD shows Codec/Dec MPEG-2 ffmpeg, CPUs 2 x (2.80 GHz) ~85%, Deint 2x CPU
onefield
{{{
2019-12-11 19:36:32.119275 I Player(1): FPS: 25.01 Mean: 39987 Std.Dev:
1237 CPUs: 88% 82%
2019-12-11 19:36:33.119052 I Player(1): FPS: 25.01 Mean: 39980 Std.Dev:
660 CPUs: 80% 86%
2019-12-11 19:36:33.671667 I Player(1): AV Sync: Audio ahead by 33 ms
2019-12-11 19:36:33.709330 I Player(1): AV Sync: Audio ahead by 32 ms
2019-12-11 19:36:33.746729 I Player(1): AV Sync: Audio ahead by 30 ms
2019-12-11 19:36:33.785031 I Player(1): AV Sync: Audio ahead by 27 ms
2019-12-11 19:36:33.821721 I Player(1): dropping frame to catch up,
lateness=31845 usec
2019-12-11 19:36:33.892225 I Player(1): AV Sync: Audio behind by 27 ms
2019-12-11 19:36:33.936415 I Player(1): AV Sync: Audio behind by 24 ms
2019-12-11 19:36:34.116205 I Player(1): FPS: 25.08 Mean: 39875 Std.Dev:
10713 CPUs: 88% 83%
2019-12-11 19:36:35.119459 I Player(1): FPS: 24.93 Mean: 40118 Std.Dev:
802 CPUs: 86% 84%
2019-12-11 19:36:36.119252 I Player(1): FPS: 25.01 Mean: 39980 Std.Dev:
599 CPUs: 86% 81%
}}}
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Ticket URL: <https://code.mythtv.org/trac/ticket/13532#comment:5>
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