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.mts are AVCHD. I presume you were transcoding all your footage in FCP? AVCHD probably taxes your CPU more than any other codec. You should expect slower performance doing native editing with such an "efficient" codec. Try messing with your Memory Preferences. Or, transcode your footage to something intraframe (like ProRes) before you begin editing.
Are you importing stills? Large stills in a timeline have often brought my editing to a crawl. I think Pr has to cache them all before doing the scaling, etc. It puts a load on the CPUs and RAM.
Welcome to the forum.
Some things to consider:
- Make sure your MTS files are copied from the camera/card to a hard drive with the camera's folder structure completely intact. Then use Pr's Media Browser to find, preview and import the footage. Red frames indicate dropped frames, so unless the footage from the camera is genuinely corrupted, they indicate a bottleneck somewhere in the import/playback pipeline. An example would be if you tried to edit using the files directly from the memory card.
- What CPU is in your Mac (I assume Mac because you mentioned Final Cut)? MTS files are probably AVCHD and are notoriously hard to decode on the fly unless your CPU is pretty beefy -- like a hyperthreaded quad-core i7.
- More Mac stuff -- Quicktime is still 32-bit, but Adobe has some custom-built 64-bit QT importers. The catch is that if the codec inside the MOV file isn't one of the ones that has a matching custom importer, Pr falls back into QTs 32-bit architecture. That could be an issue depending on the codec you chose when exporting from AE.
Hi Jeff, thank you for all your advice. That makes a lot of sense. We are talking about getting black magic cameras and possibly new video cards, so we might be working with pro res and the playback engine soon. Fingers crossed.
I think the best thing we can do is get away from the AVCHD.
Hi Jim, thank you for you help. I don't have a lot of storage so transcoding is not really an option, I have begun making all of my stills much smaller since I read your reply, it seems to be helping a lot. Clearing the cache along the way helps too.