Which application can I use to test webcam?

[richfm]

I want to test the webcam to see if it works but have tried many applications without success. I've installed ekiga, guvcview, xawtv, cheese, webcam and webcamoid, kamoso, and akqml, all with synaptic. Some didn't run with error messages, some ran but needed a USB cam, none accessed the built-in webcam. Which application have others installed to use the webcam and how did you install it?

Have you tried preinstalled programs, say ffmpeg or smplayer? They work for me out of the box just by pointing them to /dev/video0

$ smplayer /dev/video0 
$ ffplay /dev/video0

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However Cheese did work-ish. It was very slow, under 1 frame per second.

With ffmpeg, I get 6.8 fps.

Thanks for your reply. smplayer /dev/video0 worked and cheese worked but both were choppy. ffplay /dev/video0 crashed with a core dump. Any suggestions for getting  ffplay /dev/video0  working? At least I know the webcam works!