Sound: omxplayer, mixer, alsa, mplayer

[heipei]

Hi,

since sound playback is my first important task for the Rasbperry Pi, I'm having some issues:

• omxplayer works fine, can switch between local/hdmi, can stream from the internet.
• alsamixer does not work, i.e. the output volume of omxplayer does not change
• mplayer does not work (tried with different -ao), neither does the speaker-test
• dmesg gives weird messages when trying to use mplayer/speaker-test

I can provide outputs of these programs, but you guys can do that yourselves I suppose. The question thus is:

• What does omxplayer do differently, what kind of (strange) libs does it use?
• Is there some mixer that works?
• What does it take to get mplayer to work?

Loving the Pi so far, and happy that there is a Debian image for it ;)

[asb]

omxplayer does not use ALSA, instead it uses the OpenMAX sound APIs. There have been some fixes to the ALSA drivers for the pi since I made this last image (I need to put out an update to the firmware package).

[heipei]

Thanks for the quick reply. In the meantime, is there any way to adjust volume for OpenMAX programs? Even if its a simple C snippet, I'd be thankful

[KenT2]

It may not answer your question exactly but controlling volume on omxplayer is discussed here

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=38&t=7987