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What's the "best" standard video format


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#1 Niki Mundo

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Posted 14 February 2008 - 08:40 PM

I've heard rumors that MiniDV is a poor choice for chroma-keying because of the compression affects colour or something.
But if the final product with be B&W should it matter? I plan on removing all the colour in the final stages.

Is there an ideal standard video format for this (I've heard Hi-8 is good for green-screening).

Thanks!
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#2 Scott Fritzshall

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Posted 15 February 2008 - 01:44 AM

MiniDV is a poor choice because it throws away a significant amount of data through compression and subsampling. It may matter less if you're going to end up as B&W, but you're still in danger of ending up with poor edges. DigiBeta is considered the professional format for SD video, and it has much less compression and subsampling (4:2:2 as opposed to 4:1:1 on NTSC or 4:2:0 PAL miniDV).
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#3 David Auner aac

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Posted 15 February 2008 - 02:30 AM

Is there an ideal standard video format for this (I've heard Hi-8 is good for green-screening).


Hi Nikki,

is this one of your shrew jokes again or are you serious for once?

Cheers, Dave
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#4 John Sprung

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Posted 15 February 2008 - 05:06 PM

The main thing to watch out for is the chroma sampling structure. It does matter even if you're going to make the final image B&W, because chroma keying uses chroma information to decide where to put the matte lines. For instance, in 4:4:4, chroma and luma have equal spatial resolution. In 4:2:2 or 4:2:0, chroma has only half the resolution of luma. In 3:1:1 it's one third, and in 4:1:1 it's one quarter.




-- J.S.
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#5 Matthew Buick

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Posted 17 February 2008 - 05:34 PM

Hi8 has only 260 lines of luminance. So it won't work.
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