I know this is an old thread, and updates may have helped you. However, I recently got asked a similar question about tying your footage together. Here are a few tips:
When 2 different cameras are used:
1. make sure their settings are a close match for frame rate and quality
2. If you use a stabilizer feature on any of them, remember that you'll have to transcode them in order to fix VFR from the stabilization.
When mixing multiple cameras in sequence and the frame rates differ, you have a choice:
1. Set them both to the higher frame rate and transcode them to it
2. Set them both to the lower rate
3. Set them both to a rate in between
With the first two, you run the risk of one of them looking unnatural. With the third, they will both be altered slightly; it works best if the two camera rates are not too far apart; by using a rate between them, their look is closer, and the alteration less pronounced.
However, you can also use the "Interpret Footage" in the project panel, and the time interpolation on the clip in the sequence to set it to the sequence settings. For instance, if you interpret 30p footage to 24p, it will drop frames, but if you turn on the frame blending interpolation, it appears to blend that dropped frame into the frame just before or after, which creates a ghosting quality for only that one frame, but allows motion to track without such a jump. If you have to do that with 60p to 30 or 24, you're better off with Frame Blending if the background moves, but optical flow (new) if the background is relatively static.
Mixing interlaced and progressive is never a good idea at the outset. I would start by doing a DROP-CREATE of a sequence for the interlaced video, then use that sequence to place it in your progressive video sequence. I use third party plugins to de-interlace with better results, placing it on the nested sequence. This provides the best look, but requires you to render out your previews first. Placing directly on the clip enables you to put the clip into a progressive sequence, but it doesn't allow preview rendering.
I edit with proxies of 2 types. The first is for general use, and low quality. Then I attach another which is better quality to check out effects. I always use my own presets for sequences if I have some idea of what settings my cameras use, because I can set my own preview renders to a low quality preview while editing. When previewing the whole thing, I use previews, and export to the same codec. It allows me to get a look at the whole thing at a lesser quality, but faster. When I'm really concerned about an effect, I attach the full quality input, and only export a small section to preview the effect at full quality. About 10-15seconds is enough. I can check color, noise, motion etc, all from the most important sections by either using basic in\out export, or by creating subclips of the sequence (subsequences) to export.
