Noel Jones
Hi, Sorry for the slow response, I’ve been running a series of extensive tests. In doing so have found that the best way to make this work is do exactly what you suggested. I.E. ‘If you transcode the timeline, it will re-generate the proxy media’. After doing that you’ll need to re-export the FCPXML (this ensures the bookmarks reference the newly created proxy clips). The new FCPXML should work in X2Pro5.