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Python opencv bindings don't work

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linux-howto

http://www.daniweb.com – Hi! I'm trying to use the opencv bindings of Python. I tried the following code: from opencv.highgui import * from opencv.cv import * cam = 'cam' cvNamedWindow(cam) cap = cvCreateCameraCapture(0) while cvWaitKey(1) != 27:   img=cvQueryFrame(cap)   cvShowImage(cam,img) Although the window seems to open fine, I cannot see any image. I just get a window without any image -> as if there is no image stored in variable 'img' On checking the 'img' variable (using cvSaveImage('test.jpg',img)), I found that the img file was ok (the stoed file was correct). Any idea what is causing the problem? (General)