[mythtv-commits] Ticket #13579: Audio sync lost when forwarding & rewinding

[MythTV]

#13579: Audio sync lost when forwarding & rewinding
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 Reporter:  bib1963               |          Owner:  (none)
     Type:  Bug Report - General  |         Status:  infoneeded_new
 Priority:  minor                 |      Milestone:  needs_triage
Component:  MythTV - General      |        Version:  Master Head
 Severity:  medium                |     Resolution:
 Keywords:                        |  Ticket locked:  0
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Comment (by bib1963):

 I've posted logs elsewhere and this is with the latest master head.

 I find that if I set off a linux kernel build with MAKE="make -j<max
 threads>", then the FE will quite readily lose audio sync. This was tested
 with a ripped episode off a dvd of The IT Crowd, so there is no prospect
 of transmission errors.

 Looking at a patch supplied a few days ago, MythPlayer: Increment
 m_framesPlayed when frame is dropped, and, MythPlayer: Don't reset
 m_framesPlayed based on current timestamp, I am wondering if this is any
 where near correct.

 m_framesPlayed gets increased by 1, but what if multiple frames were
 dropped. What if, due to load, the section prior with "while (framedue ==
 0)" only fired once, when it should have fired multiple times.

 And as I look at line 1639, - Get video in sync with audio - I am
 wondering why that section looks so convoluted.

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Ticket URL: <https://code.mythtv.org/trac/ticket/13579#comment:2>
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