[mythtv-commits] Ticket #1104: multi channel audio support

MythTV mythtv at cvs.mythtv.org
Thu Feb 21 06:11:51 UTC 2008


#1104: multi channel audio support
-------------------------+--------------------------------------------------
 Reporter:  Mark Spieth  |        Owner:  danielk
     Type:  enhancement  |       Status:  closed 
 Priority:  minor        |    Milestone:  0.21   
Component:  mythtv       |      Version:  head   
 Severity:  medium       |   Resolution:  fixed  
  Mlocked:  0            |  
-------------------------+--------------------------------------------------

Comment(by Denys Dmytriyenko <denis at denix.org>):

 Replying to [comment:49 Tyson Harding <tharding at cs.utah.edu>]:
 > I couldn't get this to play DVDs with "Extra Audio Buffering" enabled.
 Six channel audio would not work, the frontend would get stuck in a loop
 with a black screen. The logs showed
 > {{{
 > [ac3 @ 0xb7330ba8] buffer 192000 too small
 > }}}
 > printed repeatedly and the frontend would not respond.
 > I was able to fix the problem by either turning off "Extra Audio
 Buffering", or changing the AVCODEC_MAX_AUDIO_FRAME_SIZE value from 192000
 to 384000, so now avcodec.h has
 > {{{
 > #define AVCODEC_MAX_AUDIO_FRAME_SIZE 384000 // 2 second of 48khz 32bit
 audio
 > }}}

 I'm now experiencing this same issue with latest SVN playing some/most
 DVDs. None of the suggested fixes work for me - Extra Audio buffering is
 off and FRAME_SIZE increased to 384000.

 I see this (I believe "audio stream changed" is the cause):

 {{{
 [ac3 @ 0xb7392688]buffer 192000 too small
 audio stream changed
 NVP: Disabling Audio, params(0,-1,48000)
 [ac3 @ 0xb7392688]buffer 192000 too small
 [ac3 @ 0xb7392688]buffer 192000 too small
 [ac3 @ 0xb7392688]buffer 192000 too small
 ...
 }}}

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/1104#comment:111>
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