On Sat, Jan 16, 2010 at 1:30 AM, Paulo Assis <[email protected]> wrote:
> 2010/1/15 Javier Candeira <[email protected]>: >> I am working with minoru3D, a dual-webcam that is really two z-star >> vimicro webcams and a usb hub in a single package. >> >> I can get images from either one of the cameras using python-opencv >> (Ubuntu 9.10, 32 bits), but when I try to capture from both cameras in >> sequence I get this error: >> >> "VIDIOC_STREAMON error 28, No space left on device" > > It seems there is not enough USB bandwidth for streaming from both > cameras at the specified resolution/Mode. > > I'm not a opencv expert but it looks you are asking for a 640x480 > resolution, this shouldn't be a problem even for a uncompressed yuv > stream, in any case if the camera supports MJPG could you force that Unfortunately the Minoru cams do not support MJPG. > mode instead and check if you still get the same error. Also try other > applications (luvcview, guvcview, cheese, ....) I have tried running two instances of luvcview, two instances of guvcview, one of each, one of either and one of cheese, to no avail. When I try to run two instances of luvcview, one with /dev/video0 and the other with /dev/video1, the first works fine, but the second instance exits with this error: kandin...@derive:~/data/work/hack/pyralax$ luvcview -d /dev/video1 luvcview 0.2.4 SDL information: Video driver: x11 A window manager is available Device information: Device path: /dev/video1 Stream settings: Frame format: YUYV (MJPG is not supported by device) Frame size: 640x480 Frame rate: 30 fps Unable to start capture: No space left on device Error grabbing Cleanup done. Exiting ... > I'm pretty sure that Laurent fixed some bandwidth issues with this > camera some time back, I'm surprised that this doesn't work in 2.6.31. Thanks a lot for your answer! Cheers, Javier _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
