This was a while ago, but iirc, It happens when there isn't enough current. The solution is to make sure that the BBB was turned on via the barrel power with the camera connected. If you're running the ucv camera off of an auxiliary powered hub, then you don't need to have it connected first, but you do need to have the barrel power plugged into the BBB before turning it on. This is because otherwise the 5v flag is switched to off.
On Sun, Feb 2, 2014 at 12:31 PM, Moon Walker <[email protected]> wrote: > Same here. > Did you find any solution? > > Attila > > > On Wednesday, June 19, 2013 6:34:13 AM UTC+2, crown wrote: >> >> I have a ucv camera connected to the BBB. It's powered through the 5v and >> the camera light turns on. I can see it fine in the usb. I've tried taking >> a picture through multiple different avenues and have gotten the following >> errors. Does anyone have any helpful tips to figuring this out? >> >> - Python OpenCV: >> >> >>> import cv2 >> >>> capture = cv2.cv.CaptureFromCAM(0) >> VIDIOC_QUERYMENU: Invalid argument >> VIDIOC_QUERYMENU: Invalid argument >> VIDIOC_QUERYMENU: Invalid argument >> >> - FFMPEG just stalls after the following and doesn't actually record a >> frame. >> >> ubuntu@arm:~$ ffmpeg -f video4linux2 -i /dev/v4l/by-id/usb-Alcor_ >> Micro__Corp._USB_2.0_PC_Camera-video-index0 -vframes 1 >> /home/ubuntu/test.jpeg >> ffmpeg version 0.8.6-6:0.8.6-1ubuntu2, Copyright (c) 2000-2013 the Libav >> developers >> built on Mar 31 2013 01:04:55 with gcc 4.7.2 >> *** THIS PROGRAM IS DEPRECATED *** >> This program is only provided for compatibility and will be removed in a >> future release. Please use avconv instead. >> >> >> Note that both methods work on my laptop (mac osx). >> >> >> -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/vOCa2A6CD2Y/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
