Multi-camera sync question

Hi,
Had anyone tested several BMCCs in long duration multicamera recording?
I want to be sure there's no sync drift problem.

Hi.

Feed TC to one audio channel and later read the same audio channel for timecode and there should not be any
shift in theory ?

You won't get drift on long takes.

You can use an external TC clock and record audio LTC on one of the audio tracks. Resolve can then use this LTC as the TC field. So can a lot of other edits applications like Avid.

JB.

You won't get drift on long takes.

You can use an external TC clock and record audio LTC on one of the audio tracks. Resolve can then use this LTC as the TC field. So can a lot of other edits applications like Avid.

JB.

Thank you for reply, John. Yes I know I can feed TC or even audio signal for later sync. My the question was not about syncing, but about drift as these cameras don't have external sync input. If internal crystals aren't precise enough you'll get drift regardless of timecode. For example if I use canon DSLR in addition to pro cameras, it drifts some frames within 12 minutes of it's longest take (this means FPS is not exact 25). Also different DSLRs drift differently.
So I ask anyone who has at least two BMCCs to start them, make a sync point, then run record for at least hour, make another sync point and compare files if pieces between sync points are of same length.

Mike