[mythtv-commits] Ticket #5536: mythfrontend crashing on DVD AC3 6 channel playback

[MythTV]

#5536: mythfrontend crashing on DVD AC3 6 channel playback
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 Reporter:  Lindsay Mathieson <lindsay.mathieson at optusnet.com.au>  |       Owner:  awithers  
     Type:  defect                                                 |      Status:  new       
 Priority:  minor                                                  |   Milestone:  unknown   
Component:  mythdvd                                                |     Version:  0.21-fixes
 Severity:  medium                                                 |     Mlocked:  0         
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 I have the single disc version of "I Am Legend" ripped as a ISO which I am
 trying to playback.

 Playback is fine if I have mythfrontend set to stereo sound (general
 setup).

 However if I have ALSA:surround51 setup then when I try to play the main
 move the screen goes black, the CPU pegs at 80% and after a minute
 mythfrontend crashes.

 The log shows the following. It ends after a *lot* (13 MB) of frame sync
 errors.

 I'm not sure why mythtv is trying to dowmix AC3 from 6 to 3 channels as
 Surround51 is working (tested with other programs).

 My sound chip is a onboard ALC662 using the analogue  output, setup as per
 here:


 http://blackpaw-mythtv.blogspot.com/2008/06/getting-51-surround-sound-to-
 work.html


 2008-07-08 07:20:36.277 DPMS Reactivated.
 2008-07-08 07:20:36.277 DPMS Deactivated
 2008-07-08 07:20:36.302 NVP: Disabling Audio, params(-1,-1,-1)
 2008-07-08 07:20:36.382 NVP: prebuffering pause
 2008-07-08 07:20:36.713 AFD: Warning, video codec 0x82e3760 id(MPEG2VIDEO)
 type (Video) already open.
 2008-07-08 07:20:37.007 AFD: codec AC3 has 0 channels
 2008-07-08 07:20:37.008 AFD: Opened codec 0xaaf20ef0, id(AC3) type(Audio)
 2008-07-08 07:20:37.017 Opening audio device 'surround51'. ch 6(3) sr
 48000
 2008-07-08 07:20:37.017 Opening ALSA audio device 'surround51'.
 2008-07-08 07:20:37.067 Mixer unable to find control Master 1
 2008-07-08 07:20:37.067 Mixer unable to find control Master 2
 2008-07-08 07:20:37.067 Mixer unable to find control Master 3
 2008-07-08 07:20:37.067 Mixer unable to find control Master 4
 2008-07-08 07:20:37.068 Mixer unable to find control Master 5
 2008-07-08 07:20:37.068 mixer unable to find control Master 1
 2008-07-08 07:20:37.073 NVP: Enabling Audio
 2008-07-08 07:20:37.077 [mpeg2video @ 0xb739cc28]Warning MVs not available
 2008-07-08 07:20:37.086 [ac3 @ 0xb739cc28]Cannot downmix AC3 from 6 to 3
 channels.
 2008-07-08 07:20:37.086 [ac3 @ 0xb739cc28]frame sync error
 2008-07-08 07:20:37.086 [ac3 @ 0xb739cc28]frame sync error
 2008-07-08 07:20:37.086 [ac3 @ 0xb739cc28]frame sync error
 2008-07-08 07:20:37.087 [ac3 @ 0xb739cc28]frame sync error
 2008-07-08 07:20:37.087 [ac3 @ 0xb739cc28]frame sync error
 2008-07-08 07:20:37.087 [ac3 @ 0xb739cc28]frame sync error
 2008-07-08 07:20:37.087 [ac3 @ 0xb739cc28]frame sync error
 2008-07-08 07:20:37.087 [ac3 @ 0xb739cc28]frame sync error
 2008-07-08 07:20:37.088 [ac3 @ 0xb739cc28]frame sync error

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Ticket URL: <http://svn.mythtv.org/trac/ticket/5536>
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