50p video workflow in FCP7

[Olle Sjostrom]

Trying to sync audio with video in FCP7. Video is at 50p. Timecode on audio is at 25. When I try to merge them, it works, but only partially. Like half. I know fcp is picky with timecode and length of audio files be displayed wrong because of the different timecodes in the timeline.

When I set the audio file's timecode to be 50 fps, via modify-timecode, what it does is it doubles the amount of frames within the same time frame. So what in 25 fps was TC 2:01:01:24 is now 01:01:01:49 when it should still be ending with frame 24 and continue up. Sorry if this is confusing. I'll add screenshots later.

What this means is that nothing really happens. Audio in the merged file seems to be shorter than it actually is.

Dragging the original audio file to the timeline displays it properly.

Tried doing this in resolve too. Works great.

What I'd really like to do is to have the 664 files replace the on camera audio. So in a dream world, I'd take the FCP project and just replace the audio files in the timeline with the new audio. Like the PT guide track function.

[Constantin]

Renember that 50p does not refer to timecode. What matters for sync is at what tc rate did they sync sound and picture when shooting? Since there is no SMPTE TC at 50fps it's unlikely it would have been that. But if it works in Resolve why not use that?

[Olle Sjostrom]

Yeah, just a slip of the mind there. The tc rate on camera is def 25, but since fcp sees the video file as 50fps the tc rate (in FCP) is too. I could use resolve to make new source files, but then I don't know how to make FCP insert all the new tracks in all the right places. Merging the clips in FCP would make that a lot easier. Or maybe I'm missing something