Rotated MPEGs won't save in QT Player

Hey,

Can people try this and let me know if you get an error? I can manually open any MPEG movie, rotate it with Show Movie Properties by selecting the “MPEG Muxed” line in the resulting dialog, clicking the “rotate left” button, choosing command-S and clicking OK. The result, of course, is not an MPEG but a .mov file which is fine.

But this code (and also using “Close Window 1 saving yes”) errors out on the save.

set theFiles to (choose file with multiple selections allowed)
tell application "QuickTime Player"
	repeat with theFile in theFiles
		open theFile
		rotate left movie 1
		save movie 1
	end repeat
end tell

“Save self contained” doesn’t work either.

What do I need to do to have QT Player save a rotated movie?
TIA

Are these MPEG-1 files?