Sound from vm

[yamamushi]

We need a way to pull sound from the qemu environment.

Several things have been suggested but I'd like them documented somewhere for us.

In addition to this sound feature, we will need to update the icecast stream to support multiple channels, so that we can failover live without breaking the encoder.

When this has been completed, the last feature will require a map.json option for allowing viewers to switch the audio source (music stream or vm) by vote.

If we can reach this point, we may be able to give users the option to vote on a music station(?)

[deelowe]

I'll start looking into this.

[miguemely]

[Just an Idea] Probably having virtual cables on the dedi. From there you have one cable going to the VM, one to the stream(probably VLC or similar hooked up to a streaming location). Then from there, have a command that will change the virtual cable that feeds to ffmpeg and switch it from speaker 1[vm] to speaker 2[vlc], and vice-versa. Would have to look more into VAC.

[deelowe]

Guest audio likely won't be possible without switching solutions. There are a few vnc clients out there that support audio, but novnc does not.

[yamamushi]

This is going to need to play into the issue, as part of the reason the stream dies is the buffer overruns generated by liquidsoap.

Here's a site that describes the issue and a workaround http://freedrool.us/blog/all-about-buffers/

The radio logs are full of stuff like this, regardless of the stream source,

2015/11/05 04:07:55 [http_4753:3] Buffer overrun: Dropping 0.02s.
2015/11/05 04:07:55 [http_4753:3] Buffer overrun: Dropping 0.02s.
2015/11/05 04:07:55 [http_4753:3] Buffer overrun: Dropping 0.02s.
2015/11/05 04:07:55 [http_4753:3] Buffer overrun: Dropping 0.02s.
2015/11/05 04:07:55 [http_4753:3] Buffer overrun: Dropping 0.02s.
2015/11/05 04:09:52 [http_4753:3] Buffer overrun: Dropping 0.02s.
2015/11/05 04:09:52 [http_4753:3] Buffer overrun: Dropping 0.02s.
2015/11/05 04:09:52 [http_4753:3] Buffer overrun: Dropping 0.02s.

So we must resolve this issue regardless moving forward.