I'm working on a project that is going to broadcast. Most of my sequence is 29.97, but I have a few clips (stock footage) that is at 23.98 or 30 fps.
I'm aware that Premiere can work smoothly with these different formats and that I can output the entire sequence to 29.97 in the end, but my question is whether this can pose problems for the broadcaster later on? Or can Premiere do all the pull down that is needed?
For example, I once had to have two videos with different frame rates (23.98 and 24) transferred to tape. I took both videos and edited them together, then exported it as one file that was 23.98. I received a call from the transfer house saying they noticed that the two videos were at different frame rates (even though I had exported it all in one video file as 23.98). They said they would have to run a special process to conform them.
So, although I can export my sequence (the one with mostly 29.97 clips, but also a couple 23.98 and 30 fps clips) as 29.97 in the end, will there be any problems (maybe not noticeable to the eye) that the broadcaster would raise later?
You can only try it and see.
I will say that in my experience, PP doesn't do a spectacular job of outputting 24p at 30i.
Does your broadcaster have a technical production guide that explains how to deal with non standard frame rates? The BBC indicate that non 25FPS video (OK I know you are in NTSC land) should be converted to 25 FPS with a motion compensated hardware standards converter. Short sequences can be done using computer software but only at the discretion of the the BBC. In other words you have to ask them them what is technically acceptable to your broadcaster.