Hi Dave,
Thanks for getting back to me. Editing on FCP 7.03, footage is 1080i – shot on Sony Z5, and imported straight from HDV tape deck. Hadn’t converted to pro-res 422. Equally have been editing for a couple of weeks now without any problems on playback through canvas. I’ve done a test by exporting a section of the sequence and that’s playing fine in Quicktime player.
Thanks
Tom