Converting edited 29.97 Video to 23.98 in FCP
For the past couple weeks I’ve been working for Revel in New York, a very cool new online video series. I started after they had already shot several pieces, and some of them had already been captured and assembled. Almost all the video was shot 24p on a DVX-100 and captured at 29.97. I figured I wouldn’t try to get too fancy, and just kept editing that way since some work had already been done at 29.97. Then I exported an edited video for upload and I took a look at it. As I should have realized, it was full of interlacing! There are a lot of moves on still photos, and it was just unacceptable. So I decided to try something I’d never done before. I took a piece that was edited as regular old 29.97 and converted it to 23.98.
First I media managed everything, so I could always go back if I screwed it up. I made a new project copying only the linked media, with 3 second handles. The handles were very important, because without them I couldn’t properly remove the pulldown on some clips. There needs to be a little bit of leeway at the beginning and end of the clip, since there will be some frames removed.

Once I had my newly created project, I selected all the DV NTSC master clips in the bin and clicked on “Tools/Cinema Tools Reverse Telecine.” Cinema Tools went to work on all the clips, and automatically removed the 2:3 pulldown.
Now I had 23.98 media in a 29.97 sequence, all of which was informing me of a newfound desire to be rendered. So I hit ⌘ + A to select all the clips in the sequence, copied to the clipboard, created a new 23.98 sequence, and pasted into the new sequence. Now I had 24p clips in a 24p sequence, with no need to be rendered. The trouble of course, was thanks to the removal of 6 available frames per second, some of the clips were now off by a frame. Some were even out of sync, but they were nice enough to tell me that. I had to go through manually and make sure everything fit together properly. Since the pieces were only about 3 min long it wasn’t too odious. Every once in a while I had to slide a clip 1 frame forward or back.
Once I was satisfied that I had a sequence that matched my original cut, I exported a fully progressive QT. The moves on the artwork are significantly better now, and there is no interlacing to be found.
Add comment August 29th, 2008




I considered a D/A converter, but they all run around $200 and don’t have any tape decks, in case I do need to capture a tape here and there. Eventually I decided that a cheap camcorder was my best option. First I got a $160 Canon camcorder. With Avid Xpress Pro I was getting a 16 frame delay and often drifting out of sync, which I assumed was because it was a cheap piece of crap. I returned it and got a $190 Sony DCR-HC28 since I’ve had such good experiences with Sony decks. I still get the 16 frame delay with the Sony camcorder, but I don’t have the drifting problem. I was working on a different project in Final Cut Pro, so I booted up the Mac OS to see what the delay would be. Turns out it’s only 2 frames, which is what I usually expect from FCP with a firewire deck. That really surprised me since it’s the same computer. From what I’ve read in online forums, the 16 frame delay is standard for Avid without a DNA like the Mojo. I’ve turned on desktop play delay, which keeps the video in sync, but it makes editing a bit more difficult.