mov, MPEG-4, and H.264 video files and choose “Encode Selected Files” from the Services menu at the bottom of the contentual menu pop-up. Control- or right-click on an AIFF, WAV, CAF audio file or. Among Lion’s new features is an Automator trick that allows you to easily convert compatible media files right from the Desktop. There are scads of utilities you can use to convert media files (and some of them aren’t marketed by spammers), but what might you use when you want something converted quickly, without a lot of fuss and bother, and that costs nary a nickel? Try these on for size: Scenario: You’ve obtained an audio or video file that’s either in a format unsupported by the device you intend to play it on-an iOS device, traditional iPod, or your Mac, for example-or in a form that you’d prefer to not use (large AIFF or WAV audio files, for example).