Change focus of a V4l2 Cam

Geppertm
275 ●3 ●11

Hi there, i´m using Ubuntu 12.10 with all dependencies and libv4l2.I want to change the focus of a V4l2 Cam. I´m trieing it with the following code:

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VideoCapture cam;
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cam.set(CV_CAP_PROP_FOCUS ,d);

Capture frames works.

If I use Windows 7 the code works fine.

2

Geppertm
275 ●3 ●11

I´ve found out that this feature isn´t implemented for Linux. I´ve implemented the features. I´m going to commit this features as soon as possible.

Comments

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.

mpatalberta ( 2013-12-12 18:48:49 -0600 )edit

Hi, I´ve made a 7z File with the changes, you can find it here: http://www.altdorfer-jungs.de/2014/opencv.7z

the main changes are in cap_libv4l.cpp.

Geppertm ( 2013-12-13 03:22:29 -0600 )edit

I recommend you to contribute your improvements to OpenCV. See instruction here: http://code.opencv.org/projects/opencv/wiki/How_to_contribute

Alexander Smorkalov ( 2013-12-14 01:20:45 -0600 )edit

Is anyone still on this? Seems like there are more missing capabilties for v4l2. Also the link of Geppertm doesn't work anymore.

vliedel ( 2014-03-06 05:35:50 -0600 )edit

0

mpatalberta
23 ●1

Thanks I will try them out.