quicktime export as dvstream

Hi everyone!

I´m new to this forum and applescript. so thanks for all the informatioin i alresady gathered here !!!

what i want to do is quite simple: I want a folderaction script to open the added items in quicktime and export them as dvstream.
so far so good. the only problem i have is that quicktime doesn´t export the mov files as dvstream. i also tried some scripts from apple but don´t work aswell. i´m using osx 10.4.3 and quicktime 7.0.3 ; and here´s the apple script. i really can´t figure out whats wrong! thanks!!

global CurrentFileSize, LastFileSize, StillBusy, StillGrowing
on adding folder items to this_folder after receiving added_items
		-- get the name of the folder
		tell application "Finder"
			set the folder_name to the name of this_folder
			-- find out how many new items have been placed in the folder
			set the item_count to the number of items in the added_items
		end tell
		ProcessAddedItems(this_folder, added_items, item_count)
	end try
end adding folder items to

on ProcessAddedItems(this_folder, added_items, item_count)
	-- loop through the files looking for finished files to process
	repeat with x from item_count to 1 by -1
		set File2Check to (item x of added_items) as string
		set AppleScript's text item delimiters to ":"
		set TheFileName to text item -1 of File2Check
		set AppleScript's text item delimiters to ""
		set LastFileSize to -1
		set Ready2Rock to false
		--loop waiting for the file to finish writing
		repeat until Ready2Rock is true
			-- modify the path accordingly - point to isDone().scpt on your machine
			set testResults to run script alias "mac osX:Library:Scripts:isdone.scpt" with parameters {File2Check, LastFileSize}
			set CurrentFileSize to item 2 of testResults
			if item 1 of testResults is true then
				set Ready2Rock to true
				set LastFileSize to CurrentFileSize
			end if
			delay 1
		end repeat
		-- now that the file has finished writing,
		-- process the file while it's in this folder
		-- because the file is so big
		tell application "QuickTime Player"
			open added_items
				if not (exists movie 1) then error "No movies are open."
				stop every movie
				set QT_version to (QuickTime version as string)
				set player_version to (version as string)
				if (QT_version is less than "5.0") or ¬
					(player_version is less than "5.0") then
					error "This script requires QuickTime 5.0 or greater." & ¬
						return & return & ¬
						"Current QuickTime Version: " & QT_version & return & ¬
						"Current QuickTime Player Version: " & player_version
				end if
				if QuickTime Pro installed is false then
					set the target_URL to "http://www.apple.com/quicktime/download/"
					display dialog "This script requires QuickTime Pro." & return & return & ¬
						"If this computer is currently connected to the Internet, " & ¬
						"click the "Upgrade" button to visit the QuickTime Website at:" & ¬
						return & return & target_URL buttons {"Upgrade", "Cancel"} default button 2
					ignoring application responses
						tell application "Finder"
							open location target_URL
						end tell
					end ignoring
					error number -128
				end if
				-- get the name of the movie
				set the movie_name to the name of movie 1
				-- check to see if the opened movie can be exported
				if (can export movie 1 as DV stream) is true then
					-- prompt the user for a name and location
					set the new_file to ¬
						choose file name with prompt "Enter a name and choose a location for the new file:" default name movie_name
					-- export the movie as DV stream movie
					export movie 1 to new_file as DV stream using settings preset "NTSC 44.1 kHz"
					-- close the movie
					close movie 1
					error "This movie cannot be exported as a DV stream."
				end if
			on error error_message number error_number
				if the error_number is not -128 then
					display dialog error_message buttons {"Cancel"} default button 1
				end if
			end try
		end tell
	end repeat
end ProcessAddedItems

Here’s a similar script saved as an application: QuickTime Export Droplet