[David Roth Weiss] “There is a good reason I always suggest self contained and never suggest reference files, and I suggest you consider doing the same. There isn’t a single new FCP user who hasn’t been burned by a QT reference file gone bad,”
absolutely true.
reference files are not allowed at my facility.
As for other settings, turn on the frame controls, set the resize for best quality.
try the bitrate at 6mbps max. 5-7mbps is a good range.