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hvx 1080p or 1080/24pA pulldown removal
Can anyone help me with a problem I’m having?
Here’s the breakdown:1. I directed a commercial which was shot on the Hvx and firestore fs-100. The dp said he shot in 1080 and 24fps. Also, he had the footage recorded into quiktimes instead of P2.
2. I am editing the footage, and have had some experience with pulldown removals. I imported the footage into the Last version of FCP before the new FCP studio 2, which just came out. The footage was in the 108060i DVC ProHD codec @ 29.97 for the frame rate. There was no option to reverse telecine (2:3 pulldown) the footage in FCP or Cinema Tools. So, I assumed that the Footage was shot using the 1080/24pA mode, which uses the advanced pulldown (2:3:3:2) And sure enough final cut would remove the advance pull down making the footage 23.98 (Cinema Tools, however, had no options)
3. Upon examining the closer 23.98 footage, I noticed a problem. There was still interlacing.
4. I have now compared the original 29.97 footage and the advanced removed 23.98. The 29.97 has three frames of progessive then two interlaced frames. 23.98 has a cadence of three progressive frames, then one interlaced.
Conclusion: The DP nor myself knows whether he shot in the 1080p (24 over 60i) hvx mode or the 1080/24pA mode (24 with advance pulldown over 60i). Do you have any suggestions?
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4 Replies
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If you’re importing into FCP6 there’s a bug in the import of 24PA video from P2. It isn’t removing the extra frames, so your footage is being imported at 29.97.
If you go to Tools and select Remove Advanced Pullldown this will convert your footage back to 23.98.
This is a bug in FCP6 that Apple is aware of but you should fill out the feedback form.
Robert Longwell
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Thanks for your reply Robert.
However, two things I should clarify again. First of all, the footage was recorded as quicktimes not p2 mxf. files. The result is 29.97 quicktimes in the 1080 60i dvcprohd codec. Secondly, I have imported this clips into FCP and already removed the advanced pulldown, but still have New, different interlacing issues.
I guess I’ll have to see FCP Studio 2, which I’ll have acces to next week, will yeild better results.
Robert, or if anyone else has any ideas, I appreciate comments.
thanks.
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[Really Cool] Conclusion: The DP nor myself knows whether he shot in the 1080p (24 over 60i) hvx mode or the 1080/24pA mode (24 with advance pulldown over 60i). Do you have any suggestions?
It sounds like this is your problem.
There is no 1080P on the HVX just 1080i that you can set frames to be 24P or 24pA, as noted both are over 60i. The difference is how they will be used in FCP – 24P would be used in a 29.97 timeline but give you the 24P feel to the footage. Great if you are mixing framerates. 24pA is when you want to edit in a 23.98 timeline, which it sounds like you do but it also sounds like you shot in 24P instead of 24pA.
I think you can get Cinema Tools to remove the pull down but I know Shake can do it since you can choose the difference cadences and tell it which one to start on. The down side is it takes time to render, since you said you where in QT mode on the firestore you will have a lot of small files to go through.
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Thanks msacci,
Your reply makes sense and seems helpful. I won’t be able to edit till friday. But, i’ll keep you updated on the progress.
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