greenscreen capturing

[ilauzirika]

I have a greenscreen gig in about two weeks.

as I'm doing it in a studio i wanted to know which would be the best way for capturing the best software out of this little friend.

I have adobe onlocation (if this is useful), I was thinking about using the firewire out and capturing to a good format.
If this is good which recording format would be good enough?

Thanks in advance

Iñaki Lauzirika

[John (the Duke) Wayne]

I have a greenscreen gig in about two weeks.

as I'm doing it in a studio i wanted to know which would be the best way for capturing the best software out of this little friend.

I have adobe onlocation (if this is useful), I was thinking about using the firewire out and capturing to a good format.
If this is good which recording format would be good enough?

Thanks in advance

Iñaki Lauzirika

It might be too late but this is from another site, but I can't find the link right now:



GREEN SCREEN COLOR KEYING TIPS AND TRICKS

HDV works well for keying, especially so when converted to SD, as said.

You're potentially better off keying from green than blue, due to the nature of 4:2:0 color sampling - but you can get very good results with both, if you know what you're doing.

http://www.kolumbus.fi/erkki.halkka/...nd_keying.html (http://www.kolumbus.fi/erkki.halkka/HDVKeying/Compression_and_keying.html)

There's a way to get much better edges without blurring the actual matte - what you need to do, is to antialias (in practice this usually means blurring) just the color channels of the YUV image. This will result in sharp edge without the jaggies.

In After Effects, this can be done like this:

1. Add Channel Combiner effect - set it to RGB to YUV.
2. Add Channel Blur effect - set it to 1 or 2 on both green and blue blurriness. Leave red blurriness to zero.
3. Add Channel Combiner effect - set it to YUV to RGB.
4. Add your keyer, Keylight or whatever you prefer.

What you just did, was to blur the U and V channels, or the red and blue color difference information of your image, evening out the lack of resolution there. Y channel, or luminosity, was left intact.


For the HV20 and greenscreening, dvmatte is about to be upgraded, and the creator loves the HV20 results. Only for FCP/FCE? for now though:

http://www.dvinfo.net/conf/showthread.php?t=107239