Drag the picture into the project timeline again, alongside the original picture. Or copy then paste the picture into the timeline. Extend (or reduce) the duration of the copy until it's long enough to cover the remaining length of your proposed green screen clip. If necessary, repeat this until you have slightly more than the full duration covered (that is, place as many copies in the timeline as needed). The images will all run seamlessly when played back, with no gaps visible.
Now export the background project, then import the file into an Event in iMovie. It will import as a single clip. Drag the full clip from the Event into a new project in the normal manner. Now you will be able to place the green screen clip onto the full background. You can shorten the background clip if necessary by dragging the end inwards to the desired length.
When exporting the background project, choose Share > Export using QuickTime, then follow these settings in the panel that opens:
- For Export, choose Movie to QuickTime Movie
- For Options, then Video > Settings - for Compression Type choose Apple Intermediate Codec (AIC)
- Leave all default settings as they are and click OK
- In the next panel click OK again - this returns you to the Save panel
- Give the file a name and location to export (say, Desktop)
- Finally, click Save
The file will be exported to your Save location as a .mov file in the format AIC. This is iMovie's preferred editing format and will be of virtually the same or equal quality as the original project. As explained above, you can now import the .mov file to an iMovie Event for use in your new project.
John
Message was edited by: John Cogdell
