[mythtv-commits] Ticket #3045: Guessing avsync errors when changing channels on DVB-S

[MythTV]

#3045: Guessing avsync errors when changing channels on DVB-S
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 Reporter:  support at openmedia.co.nz  |        Owner:  ijr    
     Type:  defect                   |       Status:  new    
 Priority:  minor                    |    Milestone:  unknown
Component:  mythtv                   |      Version:  0.20   
 Severity:  medium                   |   Resolution:         
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Comment(by support at openmedia.co.nz):

 I appear to have a fix for this. The problem isn't present in the main SVN
 trunk, and I've managed to backport the required components. This appears
 to fix a series of problems.
  1. Reduces risk of
 [http://www.mythtv.org/wiki/index.php/Troubleshooting:NVP:_Timed_out_waiting_for_free_video_buffers
 NVP: Timed out waiting for free video buffers] appearing
  1. Fixes audio/video stutter/jitter problem when quickly changing chanels
 - a particular problems with DVB channels on the same multiplex
  1. Removes "Guessing at new AV sync values" messages
  1. General audio sync of DVB appears to be a lot closer to the video.

 The might be a slight video jump sometimes when changing channel, but
 overall playback is greatly improved. The enclosed patch incorporates a
 backport of the following components from trunk -

  * r11324 - Modifies WarpTimecode
  * r11616 - Sets the proper bitrate in the RingBuffer after it is reset by
 an OpenFile
  * r11834 - RingBuffer adaptive sizing

 The patch is built against 0.20-fixes r13188

 This has passed all of our internal testing so I'll sortly be releasing
 the patch to customers as it makes a huge difference for any DVB users.

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/3045#comment:1>
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