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Why does pull down removal lose sync?
I know there are thousands of posts on here about 24p footagae and audio sync issues, but I couldn’t find a solution to mine.
I have footage shot with a canon XL-2 on the 24P Advanced function (yes I’m sure it’s set to advanced 24P)
I have found that the most stable way to work with 24P Advanced footage is to take my captured media into cinema tools and run a reverse telecine to pull out the interlaced frames. Then I bring them into FCP and I USUALLY don’t have any problems.However the recent footage I shot loses audio sync by about 3/4 of the way through. I captured the whole tape, looked at it in quicktime and they audio was in sync for the whole tape. I even checked and made sure that there were interlaced frames in the appropriate places at the beginning and end of the clips/tapes. I then ran a reverse telecine in Cinema Tools and when I watch the clips in quicktime the audio is in sync at the beggining, but slowly drifts out of sync by the end of clip.
I havn’t even looked at in FCP yet. Any body have experience with this problem in this type or workflow or anything like it?This problem is driving me INSANE!
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3 Replies
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If you shot 24p advanced, why didn’t you just capture with 24p advanced pulldown removal turned on?
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Highlight your clips in your FCP browser window that you want to remove the Advanced pulldown. Then go up into your “Tools” toolbar at the top, and choose “remove advanced pulldown”. See if this works for you…though you should have yielded the same results in Cinema Tools. Did you bring the footage in over Fire Wire or over SDI?
Best,
Eli -
To answer Jeremy’s question, I use cinema tools to do the pull down removal because (at least for me) it has failed me far, far fewer times and it has worked much better than doing it on the fly through final cut.
And to prove your point, I tried it that way (capturing with the 24P ADV pull down through FCP) and it worked fine. I captured 1 of 3 tapes and I noticed it split the clip up though half way through, so there might be a goofy hicup in the timecode around there. Which might explain why cinema tools was giving me odd results, but I have this audio drift problem on 3 tapes. I personally didn’t shoot the material this time, but the person that did shot with the same camera, same setting and everthing (I checked to make sure).To answer the Eli’s question, I capture through a firewire minidv deck. I haven’t tried doing the pull down removal in FCP the way you suggested. I will give that a try as well. Thanks for the tip. Does going through an SDI source make a difference?
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