Changing extension (MP4 to AAC)

[josealberto1975]

Hi,

Can I change .MP4 audio file extension with .AAC without problems. I did it but don't know if can generate an audio problem.


Extracted from CD with Nero Express (Nero6)

LC-AAC Transparent
Regards,
J. Alberto

[Cornucopia]

From my experience, MP4 files are not identical to AAC:

#1 MP4 is the MPEG(4) container format, which can include video/audio/subs/otherstreams (how do you know it's got audio?)--for that you usually would have .M4a

#2 Even if you knew it was just audio (and even if it was AAC-encoded audio), the audio in MP4 is encapsulated, whereas the AAC is not--just the raw encoded stream.

You need to demux (try MP4box). File renaming won't do it.

Scott