So, here is the deal.
FCPX can only relink to media which is an EXACT match in filetype, duration, etc. so the idea of trimming media based on what's used in a cut with handles is not really something Apple wants you to do.
But, I've been experimenting with bringing the FCPXML into resolve 12 and using the media management within Davinci to trim my media and relink to the new clips.
For the most part, it works like a dream, BUT there is always a seemingly random number of clips that just will not cooperate. Whether I copy or transcode them, is seemingly irrelevant.
I thought at first it was an issue with compound clips, but I'm noticing that some compounds work fine and others don't. And sometimes Wav's and MP3s and more. Whatever the clip, it is always that about 90% of them work fine, the rest just don't budge.
BUT WAIT! THERE'S MORE!!! In a fit of frustration, I just tried to trim and copy the same stubborn clip over and over using the same settings and after about 6 tries, it just worked. As if it finally went, "Oh, you want this one too? I didn't realize.".....
Anyway, if anyone else has tried this, and had success with it, maybe you know what I'm doing wrong?
Right now I've tried two ways. Copy and trim/Transcode and trim.
I've done this with Entire Project, Timeline and just the clips (all clips and selected individuals)
Any ideas? Is this just a bug in 12?
I've been combing the net and it seems that everyone who has done this has used 10 or 11, but as of FCPX's most recent update, only 12 will read the XML without a converter. I could do that I guess, but it will add steps that I'd like to avoid and there's no guarantee it'll even work.