[mythtv] [mythtv-commits] Ticket #8532: 5.1 sound setting generates static

[Mark Spieth]

On 6/5/2010 2:23 PM, MythTV wrote:
> #8532: 5.1 sound setting generates static
> -----------------------------------+----------------------------------------
>   Reporter:  scram69@…              |       Owner:  jyavenard
>       Type:  defect                 |      Status:  new
>   Priority:  minor                  |   Milestone:  unknown
> Component:  MythTV - Audio Output  |     Version:  Unspecified
>   Severity:  high                   |     Mlocked:  0
> -----------------------------------+----------------------------------------
>   When 5.1 sound is selected in Setup>General Settings, the OS X frontend
>   sees the AC3 audio rapidly switch back and forth between stereo or mono
>   and 6 channels (sometimes many times per frame) generating loud static:
>   2010-06-04 20:01:15.884 AFD: AC3 changed from 6 to 2 channels (frame 51)
>   2010-06-04 20:01:15.895 AFD: AC3 changed from 2 to 6 channels (frame 51)
>   2010-06-04 20:01:15.932 AFD: AC3 changed from 6 to 2 channels (frame 53)
>   2010-06-04 20:01:15.933 AFD: AC3 changed from 2 to 6 channels (frame 53)
>
>   This behavior is observed when playing back any recording from any
>   channel, as well as DVD and Blu-ray rips via MythVideo.
>
>   More complete log attached, as well as sample clips recorded from PBS and
>   CBS.
>
>    
this is because there are multiple AC3 tracks (1 2 ch and 1 6ch) present 
and the code that detects this is not filtered out by currently selected 
track.
the current code will only cope with 1 ac3 5.1 and a 2ch mpeg audio track.
jya has my patch for this.

mark