----ここからユーザー設定

set OptionAR to " -ar 44100" as Unicode text

set OptionAB to " -ab 256k" as Unicode text

set OptionAQ to " -aq 100" as Unicode text

set OptionAC to "2" as Unicode text

set OptionAN to "" as Unicode text

set OptionACODEC to " -acodec aac" as Unicode text

set OptionNEWAUDIO to " -newaudio" as Unicode text

set OptionALANG to " -alang jpn" as Unicode text

set ComPath to "/usr/local/bin/ffmpeg -y -i " as Unicode text

set FileExet to ".m4a" as Unicode text

----ここまでユーザー設定

set OpenDef to the path to desktop as alias

tell application "Finder"

---ファイルを選んで

set FileAlias to choose file with prompt "ファイルを選んでください" default location (OpenDef)

---選んだファイルをUNIX式のパスに変換する

set OpenFiles to (POSIX path of FileAlias)

---コマンドを整形して

set ComFFmpeg to ComPath & "\"" & OpenFiles & "\"" & " -vn " & OptionAB & OptionAR & " \"" & OpenFiles & FileExet & "\"" & OptionNEWAUDIO & OptionALANG & OptionAR & OptionAB & OptionAQ

---コマンド実行

do shell script ComFFmpeg

end tell