I am working on a documentary film project and I am in the last stages of shooting. I will be doing the rough editing myself and looking for some advice related to editing.
At the moment I am working on a teaser for pitching and wondering what would be the best way to deal with different resolutions. I am using Sony FS7 and Gopro 5 and the footage comes in a number of different resolution:
Sony FS7 4K (4096 x 2160) (70% of the footage)
Sony FS7 Slow motion mode (1920x1080)
Gopro 5 4K (3840x2160) and (2704x1520) and (1920x1080)
I would be grateful if someone could advise me on what would be the best project resolution in FCPX to combine all this footage of different resolutions. For now I have set it 4096 x 2160, however, I am not sure if that is an optimal setting to accommodate other resolutions.
Agreed. But keep in mind any timeline larger than 1920x1080 will have some "soft" footage since two of your sources are 1080. In a perfect world, 1080 is your deliverable and you can make your project that resolution.
Depends on your delivery specs of course, but if I were you, I'd go ahead and finish in 4k and not 1080p since that's the bulk of your footage. And by 4k, I mean probably UHD at 3840x2160, so you keep 16x9. You CAN do your original res, to have closer to that 1.85:1 ratio, but it'll make delivery for TV more of a pain and force you to zoom in your 1080p and UHD footage a little bit more. If this were two years ago, 1080p would be fine, but I wouldn't do that for a documentary film now.
All that said, FCPX is actually pretty good about changing resolutions of a timeline at any time. All your scaling and keyframing is based on percentages and not absolute pixels, so you wouldn't have to redo any of it.