[mythtv-commits] Ticket #5598: No audio with ac3 "mono" tracks

MythTV mythtv at cvs.mythtv.org
Fri Apr 3 03:42:54 UTC 2009

#5598: No audio with ac3 "mono" tracks
 Reporter:  tafypz          |        Owner:  ijr       
     Type:  defect          |       Status:  closed    
 Priority:  minor           |    Milestone:  0.21.1    
Component:  Video Playback  |      Version:  0.21-fixes
 Severity:  medium          |   Resolution:  duplicate 
  Mlocked:  0               |  

Comment(by andy at leiserson.org):

 I found a similar problem with digital TV recordings from a couple
 channels. One with the problem is the digital KRCB broadcast on San
 Francisco Comcast 107-1. The audio in the recording is (according to
 mplayer) "AC3: 1.0 (mono)  48000 Hz  192.0 kbit/s". mplayer clones the
 mono recording internally and it plays with sound. mythtv reports the
 "Channels count (1) not available" error.

 I tried the patch from #5900 (applied to trunk r20297), but it did not
 resolve the problem.

 However, I was able to resolve the problem by setting up asound.conf to
 have ALSA do the cloning (the hw:0,3 specification is needed in my system
 for HDMI out, should probably be hw:0,0 in most cases).

 I am just doing stereo output, not 5.1.

 pcm_slave.2ch {
   pcm "hw:0,3"
   channels 2

 pcm.!default {
   type plug
   slave 2ch

Ticket URL: <http://svn.mythtv.org/trac/ticket/5598#comment:4>
MythTV <http://www.mythtv.org/>

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