Hi, I tested this in my system and was able to grab two simultaneous YUYV 1600x1...@5fps video streams. The cameras are two different uvc logitech models connected to two separate usb controllers, my board has plenty of them :) Connecting both cameras to the same controler (e.g. the two front ports) will cause the second stream to fail.
I don't know about windows since I don't use it, but are you sure you aren't getting a zoomed (1600x1200) image from a lower resolution? maybe the windows driver is playing a trick on you. BTW with some new camera models that support MJPG in high resolution you should able to squeeze two MJPG 1600x1...@10fps video streams from the same usb controller. Best regards, Paulo 2009/11/8 Vojtech Franc <xfra...@cmp.felk.cvut.cz>: > Paulo Assis wrote: >> Hi, >> >> >>> It seems to be a problem on the driver's side. >>> >> >> No, this is a usb bandwidth problem ( not enough :D ) >> >> Did you plug the cameras into the same usb controller ? >> >> Try using different ones, one for each camera, usually for desktops >> the front ports use a different controller from the back ones. >> >> Best regards, >> Paulo >> > Dear Paolo, > > thanks for reply. I tried to run my Logitech cameras in Windows XP and > Ubuntu using exactly the same hardware (I have double boot on my > notebook). Since in Windows it runs (2 x Logitech Pro9000 camera at > 1600x1200/YUV) without problems means that it is not the (hardware) > bandwidth problem as you mentioned. > > I also found out that both cameras are connected to the same USB 2 > controller regardless to which physical port it is plugged: > $ lsusb > Bus 005 Device 004: ID 046d:0990 Logitech, Inc. > Bus 005 Device 002: ID 046d:0990 Logitech, Inc. > > Maybe if I use additional (PCMCIA) USB card it will work, however, as I > mentioned in Windows it is not necessary. > > If you have any other idea what might cause the problem I'll be obliged > to you for any hint. > > Thanks, > Vojtech > > _______________________________________________ > Linux-uvc-devel mailing list > Linux-uvc-devel@lists.berlios.de > https://lists.berlios.de/mailman/listinfo/linux-uvc-devel > _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
