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Using background multiple times [ANSWER]

Posted: Thu, 3rd Apr 2008, 7:23pm

Post 1 of 8

StuntMusic

Force: 1600 | Joined: 6th Feb 2008 | Posts: 14

CompositeLab Pro User PhotoKey 4 Pro User

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For reasons I won't bore you with, I have a video where I have a 4 second greenscreen that repeats every 11 seconds.

The space between the greenscreens are there for other content being dropped in later.

Is there a way in CL to drop the background into this file without having to have 20 + copies/tracks of that backbround... in other words, can that bacground be dropped on the same track over and over again?
Posted: Thu, 3rd Apr 2008, 7:42pm

Post 2 of 8

Plainly

Force: 1537 | Joined: 27th Dec 2006 | Posts: 767

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OK, I'm not completely sure I understand your post, but I'll try anyway. razz

If you mean that the 4-sec greenscreen shot is the same shot repeating istelf every 11 seconds, just do the greenscreening once and copy-paste the clip multiple times in your editor after having been rendered.

If you mean that it's a different shot every 11 seconds, than this is what you should do:

You see, CompositeLab works with layers. You do the chroma keying, then take the picture/video from the 'Media' tab in the toolbox and literally put it under the video.

So if it's a picture you're using as a background, then you only need to put it once on the timeline, under all your chroma keyed shots, and make it last the right amount of frames. You cannot do this, however, if the shots in-between your greenscreen shots are also using a greenscreen. In that case, you would need to crop the duration of the background to fit every individual chroma keyed shot.

And remember: When working in CLab, work shot-by shot, not with the whole movie at once, for then your project will be way too massive.

I hope this was helpful. razz

Plainly
Posted: Thu, 3rd Apr 2008, 7:51pm

Post 3 of 8

StuntMusic

Force: 1600 | Joined: 6th Feb 2008 | Posts: 14

CompositeLab Pro User PhotoKey 4 Pro User

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It is a differnt shot every 11 seconds and the whole thing is already laid out in a video in Vegas.

There is just no way to do in CL, so I am slicing up the 4 second pieces, going to screen them in CL and put them back into the Vegas file.

Not my first choice, but it needs to be done.

I am learing a LOT on workflow with this first time project. Of course, I didn't purposefully try to keep it simple to ramp up slowly... I just said "how hard could that be?"

They say immersion is the best way to learn!
Posted: Fri, 4th Apr 2008, 2:38am

Post 4 of 8

Plainly

Force: 1537 | Joined: 27th Dec 2006 | Posts: 767

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If I understand your post correctly, you're saying that you'll render from Vegas, import it into CLab then rerender it and import it into Vegas? If so, then that's exactly what you need to do. As for the workflow, I don't really see how it is bad. If you use programmes specifically made for one thing - whether visual effects, sound effects or something altogether different - and it is NOT a pluggin, then having to switch between different applications for every task is, I think, absolutely normal.
Posted: Fri, 4th Apr 2008, 9:46am

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Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

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FXhome Team Member

How long is the entire thing? Sounds to me like you could just bring in the whole sequence from Vegas, key it, then render it out. No need to have each shot as a separate file, unless the greenscreen is considerably different on each part.
Posted: Fri, 4th Apr 2008, 2:39pm

Post 6 of 8

StuntMusic

Force: 1600 | Joined: 6th Feb 2008 | Posts: 14

CompositeLab Pro User PhotoKey 4 Pro User

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I tried to bring the whole sequence from Vegas and put it into CL.

The issue I was trying to avoid was having 30 "layers" of the same background for the green screen.

I have one layer that has the sequence, then, at each point in the time line I have to drop the 4 second video background in. So I wind up with 30 background layers. It would be so much nicer to have the ability to drop that background on ONE layer.

I don't see a way to do that anywhere.
Posted: Mon, 7th Apr 2008, 1:45am

Post 7 of 8

Plainly

Force: 1537 | Joined: 27th Dec 2006 | Posts: 767

VisionLab User FXpreset Maker Windows User

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Well, if it's the same background with every chroma keyed shot, then all you need to do is have 1 background layer, which will have to be cropped to last the right amount of frames (throughout the whole project, that is). To crop it, use this tool:



Click and drag! razz
Posted: Mon, 7th Apr 2008, 6:27am

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Cogz

Force: 16050 | Joined: 18th Jun 2002 | Posts: 674

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You could use just one background layer, but in the parts of the timeline where you don't want the background to show, just add a transparency grading filter, and tween the values so that the opacity is set to full over the greenscreen clips, then set opacity to none where you have the gaps. Make sure you have a keyframe at the start and end of each clip, with transparency=full, then one plus and one minus, set it to transparency=none.

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