Ideally you want all footage in the same format. If it's a high definition model, chances are it will also shoot 720p/60, so you might use that as a common format. Most modern cameras will also record 1080p/24 as well.
I am mostly looking for a strategy to create highlight
I have a lot of 1080 60i footage. Once I upgrade, I'd probably want to shoot 30p, unless there is a big disadvantage doing that. These are home video so not high motion.
To create highlight from 60i AND 30p, what are the best process?
I tend to avoid 30p as it's a non-standard format. The HD standards are:
Stick to those and you should be fine.
30p not a standard format? Most everything I shoot and edit is 30p. Looks great, even on Blu-ray (encoded to 1080i 59.94 which gives a net result of 30p).
Howard, why not do a test. I've used interlaced footage inside a progressive sequence before and saw no problems, although if most of your footage is interlaced, that may be best. Try both ways, render out, and see if there's any discernible difference.
Do you create a sequence of 30p and then export to 60i?
I've tried 24p before and was too happy with the camcorder I have. The motion is not smooth.
Edit in 30p and export as same. How does your interlaced footage look?