[mythtv-commits] Ticket #13334: Improved Video timing and Synchronization

MythTV noreply at mythtv.org
Tue Nov 6 15:04:16 UTC 2018

#13334: Improved Video timing and Synchronization
 Reporter:  Peter Bennett            |          Owner:  Peter Bennett
     Type:  Patch - Feature          |         Status:  assigned
 Priority:  minor                    |      Milestone:  30.0
Component:  MythTV - Video Playback  |        Version:  Master Head
 Severity:  medium                   |     Resolution:
 Keywords:                           |  Ticket locked:  0

Comment (by jpilk):

 DVB Radio:  I placed editpoints using the non-AVSync2 setting.  They
 worked, as expected.

 With AVSync2, playback in EditMode from those points (with cutlist
 inverted when appropriate) starts immediately, but from a position several
 seconds later ( ~15 to ~30 s).

 The time-and-frame display at the editpoint shows the values as intended.
 After start and immediate stop the values shown are updated to those for
 the sound being played.

 For these recordings the seektable shows a frame duration of 40 ms and
 keyframes separated by 8 frames.  TTBOMK mythcommflag --rebuild will not
 work with a copied file.  I suppose the timecodes in use here are embedded
 in the data.

 Non-AVSync2 skipping is unreliable for skip durations of 1 frame, 1
 keyframe and 0.5 s, but otherwise it works.

 I don't understand the magic numbers (133466 etc) in

Ticket URL: <https://code.mythtv.org/trac/ticket/13334#comment:14>
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