On Wednesday 07 March 2007, Nigel Henry wrote: > On Wednesday 07 March 2007 21:13, Anne Wilson wrote: > > I have three video devices that may be in use at any time on this box. > > One is a pci video-capture card, so always present. The other two are > > webcam and usb tv tuner. The problem is that every package that can > > handle either the webcam or the tv tuner looks for video0. > > > > tvtime's menu has an entry for changing the input, and I thought that > > should do it, but absolutely nothing happens if I click on that. I > > haven't had any more luck with amsn + webcam either - as long as it gets > > video0 it is happy, but it won't talk to anything else. > > > > There must be some way to configure these to talk to video*. I've had > > some luck with getting udev to track the webcam connection, so if I could > > point amsn to /dev/webcam, that would be solved. Similarly I could build > > a rule for the tuner, but it's no good if I can't get the software to use > > it. > > > > Has anyone managed this sort of situation? > > > > Anne > > Hi Anne. This probably going to be a totally useless reply, but, how are > the 3 devices setup at the moment? I think you have Xawtv. Try running > xawtv -hwscan to see how the video devices are setup in /dev. > > With xawtv I can specify which device to use when I launch it. For example > my TV tuner card uses /dev/video0, so that is just launched as xawtv. If I > want to use xawtv to access the webcam, I set the command on the desktop > launcher as, xawtv -device /dev/video1, and then get the webcam showing on > xawtv. I don't know much about TVtime, but it may be worth launching it > specifying the device it should use. > > Amsn is a problem, as it just looks in /dev/video. If you mess with udev, > and create symlinks (/dev/webcam) Amsn is totally lost. Can't see the wood > for the trees. > > My TVtuner card uses /dev/video0, and the webcam (ov511) uses /dev/video1, > except on FC5 with the 2.6.18 kernel, where it's a bit hit and miss in > which order they are loaded. I've used the webcam using /dev/video1 while > talking to you on Amsn, so I don't think there is a problem with Amsn, as > long as it can find a webcam device in /dev/video, whether that's > /dev/video0, 1, 2, or 3. > > I don't if this is any help, but on FC2 the USB webcam was being > given /dev/video0, and the TVtuner card wasn't being loaded. The TVtuner > card should be loaded as /dev/video0, and the webcam as /dev/video1, but > that was an FC2 problem. USB starts early in the boot process, and USB > devices were loaded before PCI stuff. > > This is what I did on FC2 in /etc/rc.d/rc.local to fix it. > > /sbin/modprobe -r ov511 (remove webcam using /dev/video0) > > /sbin/modprobe tda9887 port2=0 pal=I (load TVtuner card to /dev/video0) > /sbin/modprobe bttv tuner=38 automute=0 (more TVcard stuff) > #install bttv /sbin/modprobe tda9887 port2=0 pal=I; /sbin/modprobe > --ignore-install bttv > > /sbin/modprobe ov511 force-palette=15 (load webcam to /dev/video1) > > It may be worth trying something like this. I don't think there is a > problem with the webcam, so that can be loaded last, as Amsn is just > looking in /dev/video for a webcam device. The TVtuner card I don't know > about, but may be worth loading this first so that it grabs /dev/video0, > especially as you have problems with TVtime. Load the driver for the PCI > video-capture card second, and the driver for the webcam third. > > If all 3 drivers are already loaded you will have to do a modprobe -r for > each one in /etc/rc.d/rc.local before modprobing them in the order you want > to have them loaded. > > Personally I think this is a bit of a hack, but it has worked to get the > TVtuner card, and the webcam driver loaded in the correct order on FC2. > Thanks, both Nigel and Sander. I haven't had time to look into this any further today, but I'll take another look at it tomorrow. Anne
