if you set the module parameter cams=2 then you should be able to run two camaeras at once. At better way would be to put the cameras on different controllers. On Friday 03 Oct 2003 4:54 am, Leif Mortenson wrote: > 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 > > > > -- > video4linux-list mailing list > Unsubscribe mailto:video4linux-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/video4linux-list
