- Open FCP
- FCP crashes
- Close everything you possibly can, erase half your hard drive.
- Reopen FCP
- Wait 10 minutes for it to steady itself.
- Drag in your first clip.
- Close Final Cut Pro, batch reformat all clips (taking at least 24 hours) so FCP can deal with them.
- Put all the clips on an external hard drive because there's too many clips for Final Cut Pro to also run.
- Re-open Final Cut Pro
- Try previewing.
- Export first clip as it's own sequence so you can preview.
- Delete first clip.
- Open iMovie
- Set the movie to the exact size and format you want.
- Drag in all your HD clips (wait 15 minutes)
- Edit
- Export
REALLY. IT LOOKS THE SAME. NO-ONE WORTH KNOWING CAN TELL THE DIFFERENCE.