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.
Jeff
