Integrating the greenscreen image with the video clip
Posted: Mon, 11th May 2009, 6:07pm
Post 1 of 7
Thanks very much for your help. I am able to get the video clip and the greenscreen image onto the timeline - I just haven't been able to connect them together yet (except once by accident.) so I can see the two work together. Also, how do I have it run in real time, instead of in a jerky slow motion?
Can we do this on your Live Chat line so we can make sure I've got the sequence down pat? I went there but nobody was on the line.
Much gratitude in advance for your assistance.
Posted: Mon, 11th May 2009, 7:15pm
Post 2 of 7
First off, you might find the compositing video tutorial
helpful, as it explains the whole process.
Are you familiar with the concept of layered compositing? The layer that is highest in the layer stack will appear to be in front of any other layers. This is how the timeline works in CompositeLab. Whatever layer is highest on the timeline will appear on top of the other layers. So if you make sure your greenscreen layer is above your background layer, that's really all there is to it.
To play it back in real time, you need to preview render, using the RAM preview button at the top left of the timeline. Its got an icon that looks like a RAM memory chip.
Posted: Mon, 18th May 2009, 9:51pm
Post 3 of 7
Thanks so much, Axe. Now I am able to get the layering working - but only for about 20 seconds. In other words, when I get it all set up, I see the background image with me standing in front of it - and then I hit the play button and it works fine for about 20 seconds, just until I walk off the screen. I'm off the screen for about 10 seconds but when I walk off, the background image disappears and it doesn't come back on when I return to the screen. How do I get the background image to stay there for the entire 3 minutes of the clip? Or, do I need to trim the edges in IMovie before I bring it into Composite Pro? That would be a hassle because IMovie makes me switch formats everytime I go in and out of it.
Or, can I trim off the beginnings and ends in CompositePro?
BTW, I did Preview Render it. When I go to Play it for previewing do I just hit the little Play arrow, or do I need to change any settings in the menu first? In other words, what do I do to make it Play?
Apologies for my lack of knowledge. I'm on the verge of getting it, and I much appreciate your help, Axeman.
Posted: Mon, 18th May 2009, 10:44pm
Post 4 of 7
I'm guessing that you need to extend the length of your background on the timeline. The length of each layer on the timeline is indicated by a colored bar on its layer. The ends of this bar indicate the ends of the clip or image. Check to see that the right-hand end of the bar reaches the end of your foreground clip. If not, use the crop tool to extend it.
You can trim ends, adjust speed, and crop clips in CompositeLab fairly easily. You might want to give the video tutorial on the Interface
a watch to get familiar with the tools and where they are located.
Posted: Fri, 22nd May 2009, 6:35pm
Post 5 of 7
That heelped perfectly, Axe. Now I've got 2 other issues. It only playsback in very slow motion and i haven't been able to figure out how to watch it in real time.
Also, when I rendered it, it only rendered one short scene, and not the whole 3 minute video. How do I get it to render the whole clip?
Posted: Fri, 22nd May 2009, 8:26pm
Post 6 of 7
Question 2: The problem might be that your "in and out points" are not set for the whole movie.
Posted: Sat, 23rd May 2009, 12:37am
Post 7 of 7
Yeah, your in and out points are probably still at the default positions. They are quite easy to move; go to the first frame you want to render, and press "I" for in. Then position the playhead on the last frame you want to render, and press "O" for out. this will set the in and out pints at those positions, and when you render, everything between them will be include in the render. Or, if you want absolutely everything on the timeline to be rendered, pressing "P" will set the in and out points to the first and last frames of the timeline, respectively.
As far as the playback being slow, do you mean within the program, or after you have rendered? For internal playback, within CompositeLab, you may still need to preview render the footage. Use the RAM preview button (looks like a little computer chip at the top left of the timeline) to preview render everything between the in and out points. The manual has more info on it, and a picture in case you aren't sure which button it is. If you mean the playback of the rendered clips is slow, after you have rendered out from the progarm, then the problem is likely related to the project settings you used in CompositeLab not matching your footage.