Hi Andrew, Try using ALSA instead of OSS in RAT, as I think OSS requires exclusive access to the audio device.
Doug > -----Original Message----- > From: ag-tech-boun...@lists.mcs.anl.gov [mailto:ag-tech- > boun...@lists.mcs.anl.gov] On Behalf Of Andrew Leahy > Sent: Wednesday, 9 September 2009 1:30 PM > To: ag-tech > Subject: [AG-TECH] No audio when running VLC and RAT simultaneously w/ > Linux(CentOS)?? > > Hi, we seem to have contention issues with the audio devices when > using RAT and VLC (VideoLan Client). > > Scenario - an academic wants to play a video file (MPEG) during his AG > session and have it appear at the remote sites. > > Our first idea was to use VLC on all the AG display machines (running > VenueClient/RAT/VIC). > Audio coming out of the local display machines should be treated the > same as audio coming from remote AG sites, which should play into the > room, be echo-cancelled by our ClearOne units before going into > Line-In, so in theory it shouldn't end up echo'ing back at the remote > sites. > > When we stream the video using VLC (either in multicast or > point-to-point) without RAT running, the video & audio plays fine. > > However, if RAT is running, the video plays but there's no audio. > Not "no audio" like it's being echo-cancelled, it's "no audio" as > though VLC isn't even trying. > I suspect RAT is "locking" the Linux audio device? > I can probably dig up error messages for this, unfortunately I'm > remote from the machines right now. > > Host machines - Linux mix of CentOS5.3 and Fedora Core 8. AGtk 3.1 > > Does anyone have suggestions for working around this? > If it "should work" we'll keep trying harder! > > At the moment, it looks like we'll have to use another machine in the > AG rooms (connected to the room audio) and make sure RAT is muted so > we don't cause echo. > > Cheers, Andrew > > IT Research Support / University of Western Sydney > > -- > My Household Daily GHG Emissions incl. travel: 10kg CO2e > Consumption of Water:150L Electricity:5.3kWh Petrol:2.0L Gas:0MJ
