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You are here: MacNN Forums > Our Archives > General Archives > Digital Video & Audio Archives > Extracting one frame from a DV stream

 
Extracting one frame from a DV stream
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Professional Poster
Join Date: Oct 2001
Location: London
Status: Offline
Nov 28, 2003, 10:49 AM
 
Hi,

Sorry, this may be a very stupid question - but I was wondering if anyone could help me understand what's going on here:

I have a Formac Studio TVR (PAL) and would like to grab a couple of screenshots from my PS2.

I have recorded a bit of PS2 video to a DV stream.

However if I open the DV stream in QT player and export as picture I get a very pixellated image.

A PAL frame has a 720 x 576 size - so surely the resulting image should look better than this:

http://www.monkeyfood.com/thestuff/f...argeBlocky.jpg

Is this because QT decompresses the DV to the Mac screen in low-quality? (so that it can be displayed in real-time.)

Is this the best I quality I can get on the Mac side - even if I just want one frame? It looks a lot better when streamed back out to the TV.

Or does one frame of DV just look that bad when viewed on its own (and modern TVs enhance that)?

If so - how do magazines get high-res. screenshots of console games?

Thanks.
     
Addicted to MacNN
Join Date: Nov 2002
Location: Seattle, WA
Status: Offline
Nov 28, 2003, 11:12 AM
 
well, you could try turning on the High Quality flag in Movie Properties before exporting, and maybe photoshop it (which I bet is what the magazines do; there's also higher quality of capture than DV, which doesn't do the consumer any good on broadcast source material but might help with digital source like a console). Or if it really does look better on the TV, take a digital picture of your TV (I've decided TVs usually look better simply because they're brighter, the colors are more saturated, and the pixel latency is longer giving kind of a temporal smoothing effect. also lower res really helps a lot to reduce noise)
     
 
   
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