This can make quite a difference on twenty minutes of footage. Now you're ready to go back to FCP so start up your FCP project and open the sequence that your render is to be inserted into. Drag the freshly rendered file into the Browser. Now overwrite edit it into the sequence at your in-point and play it back. Remember that if you get a red render line here, it means that either you chose Animation or some other codec to render with, or you've got your settings incorrect somewhere.
Settings are everything.
The choice of a codec is an important one. Until recently, it was generally agreed that the Apple DV codec gave sub-standard rendering results. DV compression artifacting was incredibly destructive to high contrast images, particularly text, but two developments have caused us to take a second look at the Apple DV codec. First, the release of the QuickTime 5 beta codec has provided much higher quality rendering as well as enormous speed increases. For those who shy away from beta versions, the 9.1 updater for Mac OS 9 offers another way out.