[TriEmbed] BBB USB webcam issues?

[Alex Davis]

Anyone have experience with the BeagleBone Black and USB webcams? In my
experience with v4l2 and UVC USB webcams on the BBB, getting an image
above 320x240 is unreliable and 320x240 or below is occasionally
unreliable. I've seen this on two separate BBBs under 3.8 and 3.14
kernels. It is more reliable if you set the webcam to send a compressed
image stream (JPEG) vs uncompressed (YUV), so it makes me think the
issue is data-rate dependent on the USB bus.

I am using a Microsoft Lifecam Cinema camera. It is rock-solid on my
Debian laptop running a 3.8 kernel at up to the native 12800x720
resolution.

I know with the early Raspberry Pi there is an issue with limited USB
current, but I don't think that's the case with the BBB. I use at
minimum a 2A 5V supply, which should be plenty for the BBB and the USB
webcam. Could it be some hardware issue limited to the original 2 GB
eMMC models that I have?

There isn't much on the web with regards to BBB-specific webcam issues.
I've seen BBB projects using high-end logitech cameras for live
streaming, so it must work for some.

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