[mythtv-commits] Ticket #7759: [PATCH] Add support for repeat_pict plus related AV-sync improvements
MythTV
mythtv at cvs.mythtv.org
Wed Dec 16 15:57:30 UTC 2009
#7759: [PATCH] Add support for repeat_pict plus related AV-sync improvements
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Reporter: tralph11@… | Owner: janne
Type: patch | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - Video Playback | Version: unknown
Severity: medium | Mlocked: 0
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I've created a patch that implements the correct video delays when frames
with the repeat_pict flag are processed. This dramatically improves
playback for HD 720p and 1080i broadcast material. Also included are some
AV-sync improvements which improve next trigger management. I'm including
a complete patch and also in parts to allow ease of integration and
discussion.
* Part 1
This implements the repeat_pict delay logic in NVP and also increases the
allowed delay by CalcDelay in vsync.cpp
* Part 2
The next trigger was being allowed to fall behind too far when trying to
speed up video playback faster than possible. This caused severe playback
issues when repeated frames were encountered or a frame dropped.
* Part 3
This prevents the trigger from being advanced when a frame is dropped. If
the frame is dropped but the next trigger is advanced you lose the benefit
of dropping the frame.
This set of patches fully addresses all the problems I've seen in the past
and also resolves some extreme cases reported in the following discussion:
http://www.gossamer-threads.com/lists/mythtv/users/412883
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Ticket URL: <http://svn.mythtv.org/trac/ticket/7759>
MythTV <http://www.mythtv.org/>
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