Webcam not working on my Macbook Pro

In my case, I have a Macbook Pro late 2012, I find a number of issues like this. Regarding audio, this already happened a lot on Mountain Lion, but still exists on Maverick. The video issues seem to occur after the Maverick upgrade:

1. After recovering from sleep Skype audio will not work until after you restart Skype.

2. Webcam: no webcam is detected in Flash, Skype or Google Hangout. This requires a restart to fix.

I have tried following the support article but this does not help.

Any other suggestions. Reinstalling the OS is not a workable suggestion imho.

Kind regards,

Marc