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

[Peter Bennett]

On 11/6/18 10:04 AM, MythTV wrote:
> #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
>   MythPlayer::UpdateFFRewSkip(void)
>
John

Thanks for looking at this. I never use the editing features, so I had 
not tried them. I will take a look at it and fix this.

Peter