To do it in a video editing package I can't help there, you need to find out somewhere else I'm afraid, but I'll tell you how it works in Moho and you can think from there. When you export to a video file and select Quicktime and in the setting select "Millions+" it renders the video with an ALPHA sequence, that's a seperate invisible layer with transparency information. If you import that Quicktime file it will have transparency embedded in programs that support that.
Just to visualise try the following:
- New project
- draw something on the vector layer, just a filled shape
- Make it move
- Render as Quicktime/Millions+ settings, compression "none" to keep it simple.
- New project
- Add an image file, any image file
- Add another image layer but this time import your Quicktime file
- Now you should see the shape over the image file but the solid background has disappeared. That's basically what Alpha information does. Now you know what you need and you're on your own...
Good luck,
Reindert.
www.nobudgetvideo.com