Opened 11 years ago

Closed 10 years ago

#5536 closed defect (invalid)

mythfrontend crashing on DVD AC3 6 channel playback

Reported by: Lindsay Mathieson <lindsay.mathieson@…> Owned by: Isaac Richards
Priority: minor Milestone: unknown
Component: Video Playback Version: 0.21-fixes
Severity: medium Keywords: dvd ac3 6 channel 5.1
Cc: Ticket locked: no

Description

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

Change History (3)

comment:1 Changed 11 years ago by Lindsay Mathieson <lindsay.mathieson@…>

I've managed to reproduce the same issue on my desktop PC with a RealTek? ALC883

comment:2 Changed 11 years ago by stuartm

Component: mythdvdVideo Playback
Owner: changed from Anduin Withers to Isaac Richards

comment:3 Changed 10 years ago by stuartm

Resolution: invalid
Status: newclosed

Re-open if you can reproduce with trunk and provide a backtrace generated according to: http://www.mythtv.org/docs/mythtv-HOWTO-22.html#ss22.2

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