> I shoot 60i with high frame rates (up to 1/2000th) to create Slow Motion.
I’m sure you mean shutter speed because the frame rate is still 30 frames as 60 fields. The reason you use a high shutter speed is to make sure each frame has minimal blur which makes your slow motion look cleaner but does not create slow motion all by itself. You are describing it as if you are over cranking when you’re not.
> Then Drop my footage into a 23.98 timeline. I’ve read all the FCP users say they deinterlace? Does Sony Vegas Pro automatically do that?
Yes, Vegas will automatically deinterlace the footage for you. I would also go into the event properties and Disable Resample. This will give you smoother slow motion because it will be like you overcranked 24p footage to 30p. In other words, by default, Vegas will try and fit the 30 frames into 24, but by disabling resample, it will only use the first 24 frames for frames 1 – 24, then frame 1 of the next 24 will be frame 25 from the original footage. This will give you a little extra slowness and keep Vegas from making phantom frames to inverse telecine the 60i footage. (it won’t inverse telecine at all which is what you want)
~jr
http://www.johnrofrano.com
http://www.vasst.com