Sorry to revive this thread, but
The problem is not just "How do I take a screenshot?"
When you take a screenshot of a normal video playing in iTunes or Quicktime, you get a normal screenshot:
When you take a screenshot of a protected video file purchased from the iTunes Store, you get a screenshot with the video viewport "blanked out" and replaced by a checkerboard pattern (like you might see representing alpha transparency in Photoshop"nothing's there"):
Purchased and protected files can only be played in iTunes or Quicktime, and you can't take screenshots (at least not by normal means). I think this is to prevent screen-recorders from making unprotected copies of the video, but it also prevents single-frame screen caps.
I also can't get a cap using screen sharing and another device; the video image isn't sent along with the rest of the screen. Clever Apple
This is the iTeleport app on my iPhone:
I have figured out that you can play the video on an iOS device and do a screen cap on that device (Press on/off & home at the same time), but it's a pain to have to send the video over to the device, find the frame again, capture it, and then get the image back over to my Mac.
There must be some way to take screenshots that doesn't use Apple's built-in method, which won't capture protected video. Are there any third-party screen capture apps that will grab the actual screen output, and not the censored Apple-approved blanked-out video? Just FYI, Skitch and Monosnap don't work.
