[mythtv-commits] Ticket #5025: Incorrect video profile setting selected for Live TV

[MythTV]

#5025: Incorrect video profile setting selected for Live TV
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 Reporter:  matt.doran at papercut.com  |       Owner:  ijr       
     Type:  defect                   |      Status:  new       
 Priority:  major                    |   Milestone:  unknown   
Component:  mythtv                   |     Version:  0.21-fixes
 Severity:  medium                   |     Mlocked:  0         
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 When using Live TV the incorrect video settings are selected, because the
 dummy video resolution is used for the selection.

 The full details including a "playback" log is explained below.

 I changed my video profile setup to the "High Quality" profile, which uses
 yadif(x2) for SD content, and reverts back to linearblend for HD (>=
 1920x1080).

 When I use this profile, it works as expected for SD content, choosing the
 profile for SD content with the yadif(x2).

 However when I view a HD channel with LiveTV, it chooses the wrong profile
 (or at least the wrong deinterlacer).  I believe this has something to do
 with the "dummy video" that it sets up which has a resolution of 720x576
 while waiting for the channel to tune.

 I've attached some verbose "playback" logging showing the problem.


 In summary:
  * You can see I have a >= 1920x1080 profile that uses linear blend (line
 10)
  * It seems to start initialising video at resolution 720x576 (line 29)
  * Myth picks the video profile based on this dummy resolution (line 40)
  * The yadif interlacer is initialized with resolution 720x576 (lines 85
 and 86)
  * Once the tuner locks onto the HD channel, the video comes in at
 1920x1088 resolution (line 178)
  * The Yadif deinterlacer recognizes the change in video resolution
 (line 180)
  * Video cannot be displayed properly because yadif(x2) requires too much
 processing power for HD (lines 231-239).

 If I watch a previously recorded show it works as expected, because it
 starts playing the content that is 1920x1080 resolution ... so that it
 sets up the profile correctly.   This problem only seems to appear when
 using live TV which initially sets up the dummy 720x576 stream.

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Ticket URL: <http://svn.mythtv.org/trac/ticket/5025>
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