Green Screen and MiniDV advice

R

RC23

Member
I shot some stuff on a set using green screen and a DVX100b..I have heard there is a better way to capture this footage to get more information then just using FireWire.

Can anyone explain this to me?
 
I don't know if it is true, but supposedly the video feed from the S-video port on the camera streams the video without DV compression. But since you have already shot it, the video is already compressed. You'll just have to capture with FW.
 
Hey RC23, one of the things that ULTRA keying software does is take your already imported, dv green screen footage and exports it to an uncompressed(big) avi or quicktime(animation) codec/file. It preserves the color info better than DV. Best of all you can do this for free in your editing program and edit/color correct as usual (disk space permitting). Hope this helps.

This workaround did wonders for my greenscreen footage.

http://www.youtube.com/watch?v=WHAju7o9Uno

http://www.youtube.com/watch?v=_NnMLzY8QIk

http://www.youtube.com/watch?v=n7_Ys2b70b4
 
Even if it were true, how do you plan to get it into your computer to work with?

Point being, once you digitize it, it's compressed. Unless you have an expensive capture card which can give you uncompressed from an analog signal . . .
 
Well, if the quality is worth it (better than through with tape/FireWire), I wouldn't mind getting a (fairly) expensive capture card.

This is the first I hear about this, and if someone knowledgeable could elaborate a bit I'd really appreciate it.

(It might just be silly asking about this and in that case, well, "Ha-ha!" on me then...)
 
Its a pretty simple explanation. When DV is recorded to tape, its a compressed signal - the color compression shows up, and will have blocky edges. It is the nature of DV.

The signal passing through S-video when coming from the camera live, has not yet been compressed and escapes having the color compression artifacts.

New uncompessed capture cards Are expensive - and would typically NOT have S-video input - which would also mean purchasing an equally expensive converter (s-video to SDI) But pinnacle uncompressed cards go frequently for 2-300 on Ebay. (targa etc...) or you can pick up an old Matrox X100 and capture analogue direct to Mpeg2 with 4:22 compression - and you will have decent green screen that way as well.
 
I'm not so much worried about capture quality.. I'll just capture with my hv20 in 1080i60 and down res it to 720p with apple prores 422 codec. I've heard good things about that process.

My real issue is how do you match shooting two live objects to a comp without having to do distortion in after effects.. what is the process for getting a perfect angle when shooting for a green screen?
 
RC23 said:
I'm not so much worried about capture quality.. I'll just capture with my hv20 in 1080i60 and down res it to 720p with apple prores 422 codec. I've heard good things about that process.
Click to expand...


if you shot it on your dvx and import it from your hv20 its still going to be dv footage it wont turn into hdv 1080i60i
 
evar said:
Its a pretty simple explanation. When DV is recorded to tape, its a compressed signal - the color compression shows up, and will have blocky edges. It is the nature of DV.

The signal passing through S-video when coming from the camera live, has not yet been compressed and escapes having the color compression artifacts.

New uncompessed capture cards Are expensive - and would typically NOT have S-video input - which would also mean purchasing an equally expensive converter (s-video to SDI) But pinnacle uncompressed cards go frequently for 2-300 on Ebay. (targa etc...) or you can pick up an old Matrox X100 and capture analogue direct to Mpeg2 with 4:22 compression - and you will have decent green screen that way as well.
Click to expand...

this method sounds promising is it even worth it?
 
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