FYI – what I ended up doing was writing a python script that would parse the Final Cut XML from the source, extract the multi-clips with angles, and recreate a new XML file with each angle transformed to its correct corner in the view.
I could then import this XML into FCP and render it out. We have a lot of 4 camera sequences, so the overhead of writing a script made sense, and the solution is now programmatic (rather than manual).
The most complex part of the process was the parse/recreate of the XML format through Python – I wonder if someone’s written a Final Cut XML library for Python to make that work easier.
In any case, thanks for the input.
Sunit