I see. Then I guess it's meant to be supported on the device according to this: 
https://developer.mozilla.org/en-US/docs/HTML/Supported_media_formats#MPEG_H.264_(AAC_or_MP3)

On Apr 29, 2013, at 6:07 PM, Hubert Figuière <[email protected]> wrote:

> On 29/04/13 08:58 PM, Louis Stowasser wrote:
>> Sorry, I'm pretty clueless with audio formats. So the way I understand it is 
>> M4A is the container format and the file can be encoded in ALAC or AAC, 
>> right?
>> 
> 
> Can be, but not necessarily:
> 
> As you said in the previous email
> 
>>  Duration: 00:05:43.07, start: 0.074376, bitrate: 49 kb/s
>>    Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 
>> 47 kb/s
> 
> Which means it is AAC encoded.
> 
> Hub
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