Hi Chuck,
It’s my understanding that Final Cut Pro will not recompress images on output when you use File > Export > Quicktime movie UNLESS there is something within that specific clip that Final Cut needs to render. Obviously, when it renders due to an effect, a filter, or titles/graphics, it’s going to have to render and that would add a second generation of compression to the video. If, however, most of your video is straight cuts then no recompression happens unless you check the box “Recompress all frames” – but there’s no need for you to check that box.
What I’m saying only applies if you’re using the File > Export > Quicktime movie (not Quicktime conversion) and if you’re exporting to the same format that you captured in and that your timeline is in – in this case DV25.
Hope that helps.
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Paul Escandon
Producer | Director | Editor
Apple Certified Trainer – Final Cut Pro
Oremus Productions
http://www.oremusproductions.com
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Adjunct Professor of Media
John Paul the Great Catholic University