Need help with applescript to convert audio files using ffmpeg

[nick_harambee]

Hi

I have installed ffmpeg using MacPorts and am trying to work out a script that will convert audio files in a specified folder to mp3 files, outputting the converted files as mp3 files in another folder.

So far the script looks like this:

set convertPath to "Macintosh HD:opt:local:bin:ffmpeg"
set convertCommand to quoted form of POSIX path of convertPath & " -i {infile} -f mp3 -ar 44100 -ab 128 -acodec mp3 - "

tell application "Finder"
	set inPath to "Macintosh HD:Users:nick:Desktop:new:"
	set outPath to "Macintosh HD:Users:nick:Desktop:new2:"
	set myFiles to (files of entire contents of inPath whose name ends with ".m4a") as alias list
	
	repeat with i from 1 to count of myFiles
		do shell script convertCommand
	end repeat
	
end tell

With this script I am getting the error : "Can’t make every file of «class ects» of "Macintosh HD:Users:nickesktop:new:" whose name ends with ".m4a" into type alias list."

Another issue is that I am not sure how to define the do shell script command so that it outputs an MP3 file in the output directory.

Could someone help me get this working?

Thanks

Nick

 

[louishen]

might be easier to use this, or at least look at these Apple Scripts
Doug's AppleScripts for iTunes ♫ Doug's Actions for iTunes Volume 1 v1.0

 

[nick_harambee]

thanks, but i'd rather stick to AppleScript if possible as the conversion will be part of a larger script performing a few functions, and I'd also like to use ffmpeg for precise control of bitrate, etc. within the script