DVX100A Best settings for green screen

Lots of good soft and even lighting on the green screen is key. I don't know if any one setting will make the key better. Just use proper exposure and don't washout the foreground subject. I am getting ready to do a lot of green screening with my 100B.
 
I think you'll find that the DV compression makes green screen extremely difficult. When the image is compressed to tape the color space is reduced from 4:4:4 to 4:1:1, meaning that although the monochrome parts of the image are at full resolution, the color is basically an overlay of 2-pixel by 2-pixel blocks. When you go to change the color or to find an edge with chromakey, the lower resolution of the color space becomes evident and creates blocky artifacts.

Some programs like Ultra use vectors to interpolate across the blocky edges and restore some of the edge detail. Also, a lot of people have had great luck with clever use of chromakey choker mattes and spill supressors.

The HVX200 will record in 4:2:2 color (double the color space) which produces a lot better results requiring a lot less finesse in post. Also, if you have access to an HVX200 you can record in HD, perform the key, and then downrez to SD to diminish the artifacts even more. The chromakey I've seen coming from the HVX is pretty amazing.

In any case here are some settings to try:

Cinelike V OR B.Press
Detail -3
Chroma +2
Master Ped -2
Matrix Normal

Others have gotten really amazing results with the DVX and clever post work.
 
I think you meant in the first paragraph that 4:1:1 is 4x1 pixel blocks. 2x2 pixels is 4:2:0 which is used by PAL DV and DVD MPEG2. Either way, still 4 pixel color blocks that are harder to key with. I'm wondering if 4:2:0 would be better than 4:1:1 for that purpose? I would think each could benifit from slightly different keying techniques.

Good suggestions for settings, definately don't want any colors over ephasized or key color will be harder to blend.
 
Any news on green screen on the 100b?

Any news on green screen on the 100b?

Tommy, any luck with the green screen shooting? I also have the 100b and I painted my garage back wall in green but I never tried with the 100b.
ANy news??

thanks

Tommy K said:
Lots of good soft and even lighting on the green screen is key. I don't know if any one setting will make the key better. Just use proper exposure and don't washout the foreground subject. I am getting ready to do a lot of green screening with my 100B.
Click to expand...
 
You must log in or register to reply here.
Back
Top