Hi.
This camera probably has FW ?
I have done like that i capture SDI like always but for camera control and timecode use firewire instead. Generally it work well. I have had some issues with avid offlines but that might be that Avid express and FCP have different underestanding on timebase and i suspect that Cheapo avid makes all go bad. Same material captured one on fcp and fw control other on Avid Express and fw only.
Hope it helps.
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Margus
https://iconstudios.eu