Every time I enter a video call, the camera works fine for about 30 seconds. Then, my cam freezes. If I end the call, the green light will stay on until I close Skype, and it is recognized as in use by other apps (for instance, if I open PhotoBooth, I get the message "No Camera can be found"). If I check the A/V tab in preferences, I get a black screen for video feed. When I quit Skype, the application freezes and I have to force quit as well. Once skype is completely closed, the green light goes off and I can use the cam in other apps just fine. I used Skype last night with no problem last night and have only encountered the problem today. I've tried reinstalling Skype and restting the SMC. So at this point I'm at a loss.
I'm running a week old Macbook Pro Core i7 running 10.7.4 and using Skype version 5.8. I'm pretty sure that's all the info I need to give.
Skype doesn't like PhotoBooth, FaceTime or iMessage. So you have to close those down, as well as Skype, and then reopen Skype for it to work - hopefully!
I've noticed that once I've used skype, and pause or quit it, my isight no longer works in any app. After the machine has been asleep for a while (no sure how long, at least 30 mins) the isight camera works again, until the next time...
I did try an SMC reset, and a pram reset, neither made any difference. Just the period of time asleep/shut down.
This is on 10.8/MBP Mid 2009 15"/Skype 18.104.22.1687