Problem with Videostreaming using v4l2src

I write the following code but i just get a gst-launcher window but nothing shows up.

gst-launch-1.0 v4l2src device=/dev/video0 ! ‘video/x-raw, format=YUY2, width=640, height=480, framerate=30/1’ ! xvimagesink -ev

If your /dev/video0 is the default ov5693, please run

No I want to use /dev/video1. I have installed required drivers in it, but no luck

Please check the camera with v4l2-ctl first. If you can catch frames via v4l2-ctl, it should work with gstreamer. These are open standards.