Hi, On Wednesday 08 June 2011 10:07:20 Chandrashekhar Lavania wrote: > Hi, > > I am trying to capture VGA frames in YUYV format from Logitech QuickCam > E3500. > > But When I try to do this , I get the following error: > > uvcvideo: Failed to submit URB 0 (-28). > > Also, I put printk in the uvc_init_video_isoc() function of uvc_video.c to > get psize and size values in the following manner: > > psize = le16_to_cpu(ep->desc.wMaxPacketSize); > psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); > size = stream->ctrl.dwMaxVideoFrameSize; > > printk(KERN_ALERT "SIZE = %d\n",size); > printk(KERN_ALERT "PSIZE = %d\n",psize); > > When I try to capture VGA - YUV I get the following alerts: > > SIZE = 614400 > > PSIZE = 1984 > > This is for single frame capture. > > > I tried to do the same thing for QVGA -YUV, and then I was able to capture > the image. I got the following alerts: > > > SIZE = 153600 > > PSIZE = 512 > > > What could be causing this...
Do you have other connected USB devices that could use the USB bandwidth ? -- Regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
