View Full Version : File Formats - .m4a

11-05-2007, 12:04 PM
Anyone have any idea what program(s) this format works with or any way to convert it?


11-05-2007, 03:07 PM
m4a is mpeg 4 audio. Think of it as mp3 version 2... sorta.

mpeg [1] is an old, ugly format but also very compatible.

mpeg2 is used for DVDs and now HDV recording on consumer cameras.

mpeg layer 3-- mp3-- is for audio, a spinoff on the format.

And mp4 is the newest, best compression, use in many new devices, like small digital video recorders and cell phones, ipods, etc.
m4a is the audio format alone.

The most common use is on itunes, which has its own special protection that is almost completely impervious to attack (not that we should be telling you how to break that anyway).
I do happen to know that itunes audio files can be placed into a movie using iMovie, but that's all I've found so far, aside from iTunes to play/use them.

quicktime should open and convert this (with QT Pro, that is, for $30 at apple.com), and other applications should too. I'm guessing that VLC might have a chance. Though it's export interface is ugly, it does a great job with that.

[Note: MPEG stands for Motion Pictures Experts Group, and is also related to JPEG, though I forget that the J stands for in that.]

11-05-2007, 03:09 PM
.m4a is the successor of .mp3
It stands for Mpeg 4 Audio, while .mp3 was based on Mpeg 3

The latest version of WinAmp should be able to play .m4a-files