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Anybody seen this weirdness?
I’m onlining a show that was offlined at another facility. I’m re-digitizing the show from HDCAM at prores 1080i 29.97 10 bit. The show was offlined using apple dv downconverted footage, also at 29.97. The offline editor exported a qt file of the finished show for me to put on an upper track in my sequence to check for sync. I used media manager to make new offline clips with handles at the prores 1080i 29.97 preset. When I line up the qt of the offline with my HD sequence, some of the edits are not lining up. Most of them are correct but some of the edits are offset by 1 frame. I’m not talking about shots being slipped (although that is also happening on certain clips…somewhat to be expected +/- 1 frame), I mean the actual frames where the edit occurs in the timeline are different. I also took the qt file and compared it to the original dv sequence that it came from and it’s doing the same thing – some edits are off by a frame. I think the exported qt file is screwed up. Anybody seen this? The footage was captured months ago using 6.01 and now we are using 6.02…could this have something to do with it?
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4 Replies
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Two things. Firstly the original HDCam to DV capture shifts the HD from upper to lower field. When you compare the QT of the DV shots with fast action, there can appear to be a shift, although it is half frame.
Secondly, I have had the same situation recapturing HDCam and found the odd shot a whole frame out. It shouldn’t happen but it is easy to roll the new shot a frame. I assumed I had the odd erro becasue I didn’t have a tri level sync locking the deck & FCP during capture.
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Hi Michael
We are using standard house reference. I’m pretty sure you only need tri-level sync when working at 23.98 don’t you?
I’m not that concerned about the shots that need slipping…I figured I might have to do some of that since the original captures were being downconverted through the deck and the recaptures are going in through HDSDI through a Kona card. What I am more concerned about is the fact that some of the actual edit points are not matching between the timeline and the qt file. Never mind field issues…a cut at a certain frame on the timeline should be at the same location on the qt file that is made from that same timeline. I could understand if EVERY edit was a frame early but it is just some of them. We have been using a similar workflow for years using avid but have never had this happen. -
Whilst the HDCam deck is happy with SD ref, the Decklink Pro card wants tri level for all HD formats as far as I know. Kona may be different so thats not it.
As for cuts not matching, that is something I haven’t seen before. Was there any version differences between the offline & your online version of FCP? That’s all I can think of
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The stuff was captured on our system using 6.01 back in the summer. The person doing the offline upgraded to 6.02 a couple of months ago and so did we.
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