[kai hattermann] ” is there any chance to optimize just a selection of a clip?”
I am not sure on that….someone with a higher pay-grade than mine can answer.
But remember in FCPX you can select multiple parts of a clip to import (which is a VERY nice feature, indeed). With that, you can pick just the parts you need of that long clip and import just that part or parts. Saves storage space and makes your life easier in the edit, not having to scrub through all the un-needed footage. And you are still native, so it avoids the transcode and the large Pro-Res files sizes.
sw
Scott Witthaus
Senior Editor/Post Production Supervisor
1708 Inc./Editorial
Professor, VCU Brandcenter