Why M4a and not mp4?

[Chris Marriott]

-----Original Message----- 
From: dinkypumpkin
Sent: Wednesday, November 14, 2012 1:29 PM
To: get_iplayer at lists.infradead.org
Subject: Re: Why M4a and not mp4?

>Google would be your friend here. M4A and MP4 have the same container 
>format.  The M4A extension is just a naming convention for audio-only 
>files, a convention to which get_iplayer adheres.  For whatever reasons, 
>some players won't recognise the M4A extension, so rename.

Personally I always use the "aactomp3" flag in get_iplayer to transcode the 
AAC file as MP3 for a radio programme. No problem playing in anything that 
way.

Chris