If you had told us you were trying to grab the screenshot in DVD player, we 
would have told you
Screen Grabs are unavailable during DVD playback. You have to quit DVD Player 
first.
Ever since OSX came out, Apple made sure that it would not be possible to take 
a screenshot of a DVD. When DVD Player is open, you can't capture the screen 
with Grab, Command-Shift-3 and Command-Shift-4 both do not work when DVD Player 
is open. 

Cheers,
Ronni

Sent from Ronni's iPad4


> On 1 Sep 2014, at 10:40 pm, David Noel <[email protected]> wrote:
> 
> Many thanks to Ronni for all that explanation. However, the actual instance 
> where I had the failure of Command-Shift-4 to capture a screen shot appears 
> to have some other origin than being 'protected'.
> 
> The video I was accessing was that referenced by
> 
> http://www.alexanderslostworld.com/episode-guide/episode-5-the-land-of-the-golden-fleece/
> 
> and was recorded via EyeTV.
> 
> It seems that when viewed with DVD Player, Command-Shift-4 on a paused frame 
> of ANY video does not work, it only gives a checkerboard image.
> 
> However when the video is viewed with VLC, as suggested by Peter Hinchcliffe, 
> then a paused frame can be captured with Command-Shift-4 as expected.  Thanks 
> again to all helping here!
> 
> David Noel
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