I have been attempting to get a pair of USB OV511 webcams working on a Debian system using v4l. My first question is this even possible? I have seen some comments that suggest that it is, but have not been able to find anyplace that specifically says that it is. I have attempted to get things working using a couple different methods including xawtv and webcam. In all cases, it is possible to have both webcams connented and then to start capturing from one or the other camera. It is also no problem to stop one and then start capturing on the other. However if I attempt to start capturing on a second camera when the first is still active I get Input/output errors. As an example, I start the "webcam" program using the device /dev/video0. Works great. Then when I attempt to start another instance with its own config file that connects to /dev/video1, I get the following output: ioctl: VIDIOCGPICT(params=0/0/0/0/0,depth=0,fmt=0): Input/output error ioctl: VIDIOCSYNC(0): Operation not permitted ioctl: VIDIOCGCAP(OV511+ USB Camera,type=0x201,chan=1,audio=0,size=64x48-640x480): Input/output error ioctl: VIDIOCGCAP(OV511+ USB Camera,type=0x201,chan=1,audio=0,size=64x48-640x480): Input/output error ioctl: VIDIOCMCAPTURE(0,fmt=7,size=64x48): Input/output error ioctl: VIDIOCGCAP(OV511+ USB Camera,type=0x201,chan=1,audio=0,size=64x48-640x480): Input/output error ioctl: VIDIOCMCAPTURE(0,fmt=13,size=64x48): Input/output error ioctl: VIDIOCGCAP(OV511+ USB Camera,type=0x201,chan=1,audio=0,size=64x48-640x480): Input/output error ioctl: VIDIOCMCAPTURE(0,fmt=15,size=64x48): Input/output error can't get rgb24 data If this is not going to be possible with USB webcams, do you have any advice for what I should be using? I am interested in getting at least 2 camera working for stereo vision applications. Any advice would be greatly appreciated. Cheers, Leif
