Race Car Shooting

G

geofffzman

New member
Dear Barry Green,

Plan to shoot fast moving race cars with quick panning movement.
1. To minimize 'rolling shutter' distortion...which recording format do you recommend?

I've already recorded some footage at 30p...with another camera.
2. Can I record at 60p with the dvx200 and NOT have it appear in slow-mo on a 30p timeline?

Many Thanks
 
Sorry, I am not Barry but yes, I do it all of the time in Edius. I would assume most modern NLEs would work the same way. Just put the 60p footage on a 30p timeline and it should just 'not use' the extra frames.
 
Right. It used to be you had to conform [read: transcode] your footage before editing. Nowadays – and I use FCPX – you just place the clip in your sequence and, maybe after a render, your clip magically conforms to the settings of your timeline. Plus, those extra frames are there in case you wanted to ramp down for a slow-mo, if you will. Of course, to minimize needing to render, you can always still transcode your 60p raw to a 30p one.
 
Newer versions of premiere pro have great time interpolation techniques built into the NLE to add back motion blur as well such as frame blending and optical flow retiming. These are very helpful in getting footage shot at different frame rates to conform and look right.

As far as your question about rolling shutter. That's a tough one. I think it's something we all have to deal with using non-global shutter sensors. Barry's book on the dvx has some points on how to minimize this. I would try using some of the "fast scan" options, faster frame rate will help and zooming out helps as well. You will still get some of the skew effects but it will be less noticeable. Again, Barry has some great tips in the book.

Let us know how it goes and post some footage if you can. Would love to see how it comes out!

D
 
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