[MPlayer-users] Re: Mplayer & DD5.1 via SPDIF - I have only DD2.0: why ?

[Sasza]

Matthias Schwarzott wrote:
> On Monday 26 December 2005 22:46, Sasza wrote:
>> Hi all,
>>
>> I have DIVX file with 5.1 sound, and I want to play it via MPLAYER.
>> My MythTV (R5A22) system is connected via digital SPDIF connection to my
>> Home theater aplituner.
>>
>> Launching mplayer with various parameters gives at best DD2.0 sound.
>> DD5.1 is impossible :-(
>> I spend literally days to trying solve this issue (many hours googilng &
>> searching various forums)
>> System is: EPIA M10k, KnoppMythR5A22.
>> Used AVI file plays nicely DD5.1 under xine (unfortunately xine CPU
>> consumption is about 50% vs 25% in mplayer. Also I have problem with AVI
>> subtitles in xine)
>>
>> Pls find below mplayer logs for different cmd line option used:
>>
>>
>> 1. "mplayer -channels 6 -ao alsa -ac hwac3, file.avi"
> 
> To my knowledge this should be done like:
> # mplayer -ac hwac3, file.avi
> 
> 
> I have this in my .mplayer/config:
> ac=hwac3,
> ao=alsa
> 
> If your amp shows it plays DDx.y this is ok.
> And if your amp shows only DD2.0 then your ac3 stream IS 2.0 and you can do 
> nothing to change that.

Sorry for second post...by probably I little miss leaded You:
My ampli shows PCM 48kHz (DD, surroung leds are off)


> 
> You can check this by doing
> # mplayer file.avi -ac a52 -frames 0 2>/dev/null |grep ^AC3
> AC3: 2.0 (stereo)  48000 Hz  448.0 kbit/s
> 
> This means ac3-stream is only stereo, but this does not mean that the complete 
> avi is encoded it stereo but only the first-audio frame.
> 
> Matthias
>