[mythtv-commits] Ticket #5900: AO: Generalise upmix and AC-3 encoding

MythTV mythtv at cvs.mythtv.org
Tue Jul 7 19:44:31 UTC 2009


#5900: AO: Generalise upmix and AC-3 encoding
------------------------------+---------------------------------------------
 Reporter:  foobum at gmail.com  |        Owner:  ijr    
     Type:  patch             |       Status:  new    
 Priority:  minor             |    Milestone:  unknown
Component:  mythtv            |      Version:  head   
 Severity:  medium            |   Resolution:         
  Mlocked:  0                 |  
------------------------------+---------------------------------------------

Comment(by Markus Schulz <msc at antzsystem.de>):

 i have problems with trunk at 20650 and vdpau with interlaced content, it
 stutters alot:

 2009-07-07 20:59:10.129 NVP(0): Video is 3.22435 frames behind audio (too
 slow), dropping frame to catch up.
 'video_output' mean = '40478,59', std. dev. = '26333,50', fps = '24,70'
 2009-07-07 20:59:12.920 NVP(0): Video is 3.52245 frames behind audio (too
 slow), dropping frame to catch up.
 2009-07-07 20:59:12.921 NVP(0): Video is 3.67933 frames behind audio (too
 slow), dropping frame to catch up.
 2009-07-07 20:59:12.921 NVP(0): Video is 3.54697 frames behind audio (too
 slow), dropping frame to catch up.
 2009-07-07 20:59:12.921 NVP(0): Video is 3.19773 frames behind audio (too
 slow), dropping frame to catch up.
 2009-07-07 20:59:15.140 NVP(0): Video is 3.16097 frames behind audio (too
 slow), dropping frame to catch up.
 2009-07-07 20:59:15.140 NVP(0): Video is 3.14573 frames behind audio (too
 slow), dropping frame to catch up.
 2009-07-07 20:59:16.132 NVP(0): Video is 3.18208 frames behind audio (too
 slow), dropping frame to catch up.
 2009-07-07 20:59:16.132 NVP(0): Video is 3.36155 frames behind audio (too
 slow), dropping frame to catch up.
 2009-07-07 20:59:16.132 NVP(0): Video is 3.24615 frames behind audio (too
 slow), dropping frame to catch up.
 2009-07-07 20:59:16.385 NVP(0): 1200 interlaced frames seen.
 'video_output' mean = '38457,14', std. dev. = '30836,89', fps = '26,00'
 2009-07-07 20:59:19.191 NVP(0): Video is 3.03428 frames behind audio (too
 slow), dropping frame to catch up.
 2009-07-07 20:59:19.191 NVP(0): Video is 3.2382 frames behind audio (too
 slow), dropping frame to catch up.
 2009-07-07 20:59:19.191 NVP(0): Video is 3.14115 frames behind audio (too
 slow), dropping frame to catch up.
 'video_output' mean = '41060,94', std. dev. = '29755,94', fps = '24,35'
 2009-07-07 20:59:21.400 NVP(0): Video is 3.44955 frames behind audio (too
 slow), dropping frame to catch up.

 it's curious that's almost 3 frames, perhaps it has something todo with
 the ac3-encoder buffering.


 if i switch the deinterlacing to progressive or view progressive content
 it works fine:

 'video_output' mean = '39997,32', std. dev. = '1577,19', fps = '25,00'
 'video_output' mean = '39997,25', std. dev. = '49,07', fps = '25,00'
 'video_output' mean = '39997,73', std. dev. = '269,19', fps = '25,00'
 'video_output' mean = '39997,56', std. dev. = '900,24', fps = '25,00'
 2009-07-07 21:26:16.818 NVP(3): 22800 progressive frames seen.
 'video_output' mean = '39997,75', std. dev. = '75,89', fps = '25,00'
 'video_output' mean = '39997,66', std. dev. = '87,85', fps = '25,00'
 'video_output' mean = '39997,72', std. dev. = '1011,71', fps = '25,00'
 'video_output' mean = '39997,67', std. dev. = '411,33', fps = '25,00'
 2009-07-07 21:26:32.818 NVP(3): 23200 progressive frames seen.
 'video_output' mean = '39997,63', std. dev. = '76,92', fps = '25,00'
 'video_output' mean = '39997,26', std. dev. = '49,30', fps = '25,00'


 it works fine without ac3encoder (disabled) for both interlaced _and_
 progressive content.
 any idea?

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/5900#comment:42>
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