[mythtv-users] Mplayer No Digitial Audio with MP3 or PCM

[Kirk Bocek]

Nick Rout wrote:
> On Mon, Apr 26, 2010 at 4:27 PM, Kirk Bocek <t004 at kbocek.com> wrote:
>> I finally got digital audio working with my GT-220 thanks to Axel and his
>> newly working alsa 1.0.23 modules for CentOS 5. Thanks Axel.
>>
>> MythTV playback sounds great with a simple .asoundrc file:
>>
>> pcm.!default {
>>        type hw
>>        card 1
>>        device 3
>> }
>>
>> And mplayer works great with a couple of lines in the ~/.mplayer/config
>> file:
>>
>> ao=alsa:device=hw=1.3
>> ac=hwac3,hwdts,
> 
> Are you sure you have the final comma? The final comma means "if the
> hwac3 and hwdts don't work, fall back through the other options until
> something works" - if you missed the comma off, or perhaps if you left
> a space before it, it'll stop trying after hwdts
> 
> Also some digital setups do not like anything other than 48k sampling
> rate. However while most purely audio files are 44.1k,  video files
> with mp3 tend to be at 48k, so this is perhaps a red herring.
> 
> Have you looked at your mplayer output? Easiest way might be to ssh in
> as the user that runs mythtv with your laptop, set
> 
> export DISPLAY=:0
> 
> Then run your mplayer commands and watch the output.
> 
> Finally I note mp3s work through mythmusic, have you tried the
> Internal player on your files? Again you can try that by running from
> ssh and running:
> 
> mythtv filename.avi (<=0.21 )
> mythavtest filename.avi (>=0.22)
> 

Yes, I am certain I have the trailing comma for just the reason you mention. 
mplayer's messages in mythfrontend's log indicates mplayer identifies the MP3 
format and loads a driver. It seems like mplayer supports a couple of methods 
of decoding mp3 (libmp3, ffmp3 ??) I've tried forcing a couple of them but 
still didn't get digital output.