Re: [Linux-uvc-devel] uvcvideo: Failed to resubmit video URB (-27)

2011-09-22 Thread Alexey Fisher
On 20.09.2011 22:34, Pitt, Jason N wrote: Hi- I have a ubuntu 11.04 machine that I'm trying to capture 12 usb webcam feeds on. The webcams are split over 3 pcie usb cards and the motherboards's usb controller. I'm encountering instability using both streamer and guvcview. I can get

Re: [Linux-uvc-devel] uvcvideo: Failed to resubmit video URB (-27)

2011-09-22 Thread Pitt, Jason N
do you capture from all 12 at the same moment? maybe spread them around, a different one every 200 msec -They do not have to be synchronous, but the interval needs to be precise, ie. low jitter. I've tried repeatedly opening and closing the streams every 2.4 seconds and that almost

Re: [Linux-uvc-devel] uvcvideo: Failed to resubmit video URB (-27)

2011-09-22 Thread Pitt, Jason N
I currently do not know if usbcore itself do not allow so many ISO frames, or only one controller can't handle it. Are there any system in this error? I mean do cams day on one controller or only one per controller? Regards, Alexey It seems as if it is the usbcore itself, the 3 pcie cards I

[Linux-uvc-devel] uvcvideo: Failed to resubmit video URB (-27)

2011-09-20 Thread Pitt, Jason N
Hi- I have a ubuntu 11.04 machine that I'm trying to capture 12 usb webcam feeds on. The webcams are split over 3 pcie usb cards and the motherboards's usb controller. I'm encountering instability using both streamer and guvcview. I can get all 12 streams running but eventually one dies (in