Camara doesn't work in OpenCV

asked 2013-02-21 05:22:20 -0600

jessica
11 ●1 ●2

Hi! I have tried to use OpenCV's samples that use camara, but it didn't work. I tested my webcam with the program Cheese and it's OK. I have installed some packeges too:

sudo apt-get install libtbb2 libtbb-dev sudo apt-get install libavformat-dev libwscale-dev

After that I rebuild my OpenCV in this way: cmake-gui I selected "BUILD_EXAMPLES" I clicked in "Configure" I clicked in "Generate"

Unfutunally, anything working. I'm testing the sample bgfg_segm. I can use the video but the camara. What can I do?

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answered 2013-02-21 05:43:17 -0600

Alexander Smorkalov

5862 ●2 ●22 ●58 http://alex-alchemist....

OpenCV supports video camera access through V4l, V4l2 and gstreamer. Check that some of them are enabled in cmake before library build.
There is simple sample starter_video.cpp that takes file name or device number (0, 1, etc) from command line and show its content in a window. It helps you to check camera.

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The options V4I and gstreamer are already checked. I couldn't find the option V4L2. I builded the sample satarter_video but the message below has shown: Failed to open a video device or video file! I tried with number 0,1,2 and nothing worked.