Icecast Streaming Media Server

funkoolow · Joined: 29 Sep 2009 Posts: 7

hi all,
i'm getting mad at this, i need to stream the WHOLE audio played on the machine by a desktop user via vlc, mplayer or whatever.

I've already been able to set up the streaming from a playlist or from line input using icecast2 + ices2 and all went fine. What seems impossible is grabbing the whole soundcard output...

my cfg follows (for the ices-alsa that correctly streams mic input but excludes audio played by vlc)

icecast.xml

karlH · Code Warrior Joined: 13 Jun 2005 Posts: 5476 Location: UK

your description would indicate a mixer issue, or maybe pulseaudio is involved. If alsa only then check for the capture toggle, capture slider, input source or similar controls.

karl.

funkoolow · Joined: 29 Sep 2009 Posts: 7

thanks for your answer,
I have the same feeling but i really don't know how to investigate further. can you suggest for a path to follow? i'm runnin on ubunti 10.04 that afaik uses pulse, i've found this intresting article that explains how to correctly select the mix output via pulse

http://mikebeach.org/2011/06/28/broadcasting-a-multimedia-stream-using-icecast2-and-gst-launch-in-ubuntu-linux/

but even using gstreamer for ices seems unuseful

any other suggestion?

karlH · Code Warrior Joined: 13 Jun 2005 Posts: 5476 Location: UK

I've no idea what sound device you are using, what are the controls that are available. eg what is reported with

amixer -c 0 scontents

karl.

funkoolow · Joined: 29 Sep 2009 Posts: 7

here's the output of yout command

funkoolow · Joined: 29 Sep 2009 Posts: 7

and other outputs just in case Smile

karlH · Code Warrior Joined: 13 Jun 2005 Posts: 5476 Location: UK

looks like a number of the entries there have Capture set to off, Line, CD, Mic. What exactly are you wanting to capture?

karl.

funkoolow · Joined: 29 Sep 2009 Posts: 7

Possibly the whole output being played (that's why I selected "Mix" for capturing), is this possible? on alsamixer i cannot select more than one source for capturing...

karlH · Code Warrior Joined: 13 Jun 2005 Posts: 5476 Location: UK

if it's the case that only one of those can be set then ok, you may need to check into those individual settings to see what exactly they control, eg http://alsa.opensrc.org/Realtek_ALC650 describes 'IEC958 Playback AC97-SPSA' which may be indirectly affecting you. Have you tried capturing from CD or one of the other inputs?

karl.

funkoolow · Joined: 29 Sep 2009 Posts: 7

the only one i'm sure is working is the mic1, for which i can hear an external source playin when plugged on the soundcard plug. Can't try the cd (none available), and even aux or line seems to be not functional.

Do you think it's an issue specifically related to the chipset? if so i would try to set up some virtualboxes, thanks anyway for your great support

karlH · Code Warrior Joined: 13 Jun 2005 Posts: 5476 Location: UK

There always seems to be quirks with chipsets whether intentional or not so you could have a look specifically for capture on your specific chipset. Sometimes these less commonly know mixer setting can have effects just as passing arguments for the modules when they load.

Obviously arecord or ices will have a problem if the mixer is not set up quite right.

karl.