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Multicam Weirdness
I have a 8-angle project, the program feed with 7 iso’d cameras. These were shot at a major studio to HDCAM SR decks. Synced to TC. Now when I go to replace shoots almost all the of iso’d cameras are what looks like 2 frames early. When I look at the viewer with TC overlay turned on every angle has the same TC. But like I say when I replace the program feed with the camera that was on that take it is not the same. Unfortunately their is no SR deck that I can test out the tapes to see if I did something wrong when capturing but the method I use to capture is to log the program tape, and then duplicate that for camera 1, camera 2 and so one, then batch capture the tape. So every tape has the exact same timecode for each segment.
The weirdest thing is that there maybe just one other camera that doesn’t seem to have this problem for a particular segment but it is not the same camera each time. Example, Seg 2 looks like camera 5 is in-sync with the program but it is out on the rest of the segments and for Seg 5 it is camera 6 that is in-sync. All the segments on each tape (camera) were capture at the same time.
My system is a Mac Pro w/ Kona 3 card, it was captured a few weeks ago. The major thing that has changed is I just updated to the Kona v6 driver. But it is the randomness that has me stumped.
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3 Replies
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Michael,
Without access to the original tapes there’s no way that you can confirm where the problem is.
Have you tried looking at the audio waveforms from all the cameras to see if they sync up? I’m sure there’s no slate (clapper) to check either… that would be too easy!
We use multi cam’s all day long, and any sync issues are usually a result of the ORIGINAL tapes and timecode being slightly off. FCP just delivers the bad news.
Your only chance for a definitive answer is to reference the original tapes and see if they’re all in sync.
I’m guessing they’re NOT.Mark
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I can confirm that the image and TC don’t match between the 7 cameras and the program tape. The program tape always has one of the cameras and when you switch to the camera that was used for the program it is 2 frames off. Program is later.
Guess wondering if anyone else run into this or if there was something I did wrong but like I said I logged the one tape and captured all the tapes off of that batch.
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It is very possible there is a delay in the switcher. There are some setups where the switcher introduces a delay (depending on how the M/Es are setup, and what DVE options might be in place). So, if that were the case there’s a chance that it takes the video two-frames to make it from the camera to the record VTR. The ISO are run directly from the camera to the VTR so they don’t have that delay.
At least that’s my guess. I’ve certainly seen that with Digibeta – one of the shows I used to work on was always out by a frame between the line record and ISOs.
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