Hi Peter In the meantime I changed the alternate setting from 3 to 1 in the cpia_usb_open function. Now, both cameras are able to set the alternate setting (interface = 1), but xawtv (gqcam as well) is still not able to display both streams! I think that there is enough USB bandwidth since I changed the alternate setting to 1. Am I right? That means that video4linux has troubles handling both cameras simultaneously? Thanks, Philipp Peter Pregler wrote: > Hi, > > the second capture fails because the first one allocates all the > bandwidth on the USB-bus. The resource that is busy is not the camera > but the USB-bus. > > -Peter > > > > I've been unable to get two USB CPIA cameras to work reliably on > > > the same machine at more or less the same time. Either camera > > > > (/dev/video0 or /dev/video1) will work fine by itself when the > > > other camera is not being used--the problem arises when trying to > > > use them at or near the same time. While it is possible to open > > > /dev/video0 and /dev/video1 simultaneously, if one device is in the > > > middle of a VIDIOCMCAPTURE > then opening the other device fails > > > with a "device or resource busy error". > > > > -- > Feeling amorous, she looked under the sheets and cried, "Oh, no, > it's Microsoft!" > ------------------------------- > Email: Peter_Pregler@xxxxxxxxx > > _______________________________________________ > Video4linux-list mailing list > Video4linux-list@xxxxxxxxxx > https://listman.redhat.com/mailman/listinfo/video4linux-list
