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2013-12-13 12:48:10 -0500 answered a question Change focus of a V4l2 Cam

Thanks I will try them out.

2013-12-12 18:48:49 -0500 commented answer Change focus of a V4l2 Cam

I am working on the ubuntu 12.04lts and need the focus control I was about to start this but if you have the change please post the difference here.

2013-12-12 10:02:19 -0500 commented answer has anyone used a 8 megapixel camera with opencv

I am in contact with libv4l2 person now [email protected] and have passed my fix plus the problem description. We can see what response we get.

2013-12-11 16:35:35 -0500 commented answer has anyone used a 8 megapixel camera with opencv

had made a change to http://git.linuxtv.org/v4l-utils.git/tree tip in file v4l-utils-HEAD-4dea4af/lib/libv4l2/libv4l2-priv.h The change was define V4L2_FRAME_BUF_SIZE (4096 * 4096)

to

define V4L2_FRAME_BUF_SIZE (2 * 4096 * 4096)

When the package is recompiled and then the shared object files updated the package now works with the 8 megapixel camera in the raw mode.

What action do you want me to take or maybe you have more insight into the how this is to work?

2013-12-11 16:19:57 -0500 commented answer has anyone used a 8 megapixel camera with opencv

I have found the code for libv4l2 recompiled and found the issue. I have actually entered this as bug on opencv with notes of the fix on the libv4l2 tip.

2013-12-11 09:15:19 -0500 received badge  Student (source)
2013-12-10 13:08:19 -0500 asked a question has anyone used a 8 megapixel camera with opencv

I am using an 8 megapixel camera and when I set the resolution to 3264x2448 i get the following:

libv4l2: error converting / decoding frame data: v4l-convert: error destination buffer too small (16777216 < 23970816) VIDIOC_DQBUF: Bad address