[mythtvnz] Myth Trunk and sound....

[Stephen Worthington]

On Sat, 05 Sep 2009 10:17:13 +1200, you wrote:

>I have decided to move to trunk as gone into feature freeze and see how
>it goes.  I have SVN 21666, and compiled with --enable-libfaad to get
>the LATM going.  I have two issues
>
>1) TV3 volume is around half volume of TV1,2,3

That is caused by MythTV preferring the AC-3 audio over the AAC as it
has more tracks.  For some reason, AC-3 audio is usually at a much
lower level than AAC.  You can select the AAC track manually using the
M(enu) command from your keyboard or remote.  However, I then have
audio sync problems with the AAC track, and have to manually adjust
that by 120 ms.  AAC tracks on TV1 and TV2 do not have the audio sync
problem.

Of course, you can just turn up the volume on the AC-3 track, but you
have to remember to turn it down again or you risk blasting the
neighbours when you play something else.

>2) I get stuttering on C4, Maori, TV3+1, Prime, Freeview HD etc.  This
>is/was similar to what I was getting with Myth 0.21 with patches.  I
>have turned off Aggressive sound card buffering, ensured Extra Audio
>buffering is checked, realtime threads are off.  I increased HD buffers
>to see if this would make a difference which it did not.  Errors out of
>the logs are as follows:
>
>2009-09-05 10:10:36.581 WriteAudio: buffer underrun
>2009-09-05 10:10:36.592 NVP(1): prebuffering pause
>2009-09-05 10:10:36.684 AFD Error: Unknown audio decoding error
>2009-09-05 10:10:36.696 AFD Error: Unknown audio decoding error
>2009-09-05 10:10:36.697 AFD Error: Unknown audio decoding error
>
>Without compiling with libfaad, I have perfect picture.  It appears that
>libfaad is part of SVN? or do I need to install the latest version,
>recompile myth and try again?