Generally, Final Cut Pro especially the FCP X now can support MTS format. While, there are still some factors won’t let you import and edit MTS in FCP smoothly such as a certain camera is not recognized by your FCP, a corrupted MTS file(output of a whole AVCHD structure) won’t be supported by FCP… If you are in such situations, you are advised to convert MTS to ProRes for using in Final Cut Pro without any issue.

Transcoding MTS to ProRes 422 on Mavericks 10.9

Best Products

Camera Support Buyer's Guide

The best advanced camera support for video — 2021

While the camera will always be at the core of your production setup, using the best camera support is vital in getting smooth cinematic shots.