A new update for FCPx was released today that addresses a slew of requested features including multicam! The NEW MULTICAM is boasting 64 active camera angles driven by the 64-bit engine. A big up for metadata control of multicamera events and new syncing with keywords as well as the traditional in/out and source timecode.
The standout feature has to be the ability to edit multicam projects in mixed codecs, image rasters, and frame rates, without conversion.
I have not tested it yet but, according to Gary Adcocks review in MacWorld Magazine, “Multicam functionality is intelligent enough via the underlying metadata structure to be able to dynamically identify multiple takes from the same camera and drop them sequentially onto a multicam track—something that is utterly amazing. Apple augmented FCP X’s audio syncing capacity by allowing the app to exploit audio metadata to sync multiple cameras with similar audio content when there is no matching timecode on the files.”