macOS Repeat command question

[thriftinkid]

Hey Guys,

I'm sure this is an easy question for you gus, but I'm having some problems. I want quicktime to take every file I have in a folder and convert it to an M-peg4 format. The problem is that quicktime can only do this one at a time. The Script I current have written is opening all the files first, and then trying to convert all the files. How can I rearrange this so it does them one at a time? Thanks as usual for your guys help.

tell application "QuickTime Player"
	activate
end tell
tell application "Finder"
	set Afolder to "Macintosh:Users:JMJ:Desktop:test" as alias
	set a_list to every file in Afolder as alias list
	repeat with i from 1 to number of items in a_list
		set a_file to (item i of a_list)
		tell application "QuickTime Player" to open a_file
		tell application "QuickTime Player" to export a_file as MPEG4
	end repeat
end tell