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[JustinChase]

I have it selected in the file associations section of the options.  It will import both .mp4 and .m4a files, just not .aac files.

Any ideas why this might be?

[SteveG]

What happens if you open the file in Quicktime?

Steve

[JustinChase]

QT won't open it either.

I converted it from a .mp4 file using dBpowerAMP, using the codec they offered to do this very thing.

Very wierd.

Is there some better way to convert the file from .mp4 (or .m4a) to .aac?

Do I need/want to convert to .aac?

Does it need that extension to work on the iPod?  Is it any smaller?

Sorry, I'm just starting to move up the learning curve on .aac (and it's derivatives)

Thanks for the help.

[SteveG]

QT won't open it either.

This explains why we can't open it either because we essentially use Quicktime to open those files.

Is there some better way to convert the file from .mp4 (or .m4a) to .aac?

Search this site. Somewhere there are instructions on how to use a 3rd party plugin to do this.

Do I need/want to convert to .aac? Does it need that extension to work on the iPod?  Is it any smaller?

Not necessarily. You do not need to do this to play the files on iPod.

Steve

[JustinChase]

Thanks Steve.  I think i'll just stick with the m4a files.

[hans-jürgen]

QT won't open it either.

QuickTime only knows MPEG-4 AAC bitstreams in the MP4 container, no other file formats like ADTS AAC with the *.aac file extension.

I converted it from a .mp4 file using dBpowerAMP, using the codec they offered to do this very thing.

dBpowerAMP uses mp4creator for extracting AAC files from the MP4 container or vice versa. Other Windows GUI applications with this option would be foobar2000 or Speek's "Ivan & Menno". This is not a transcoding process, by the way, just an extraction without changing the sound.

Is there some better way to convert the file from .mp4 (or .m4a) to .aac? Do I need/want to convert to .aac?

You could also use mp4creator on the command line, but usually users prefer a GUI for it, e.g. mp4UI. And you only need *.aac files if your hardware does not support *.mp4 or *.m4a files like some Nokia mobile phones, the DivaGEM or some Philips Expanium CD portables.

Does it need that extension to work on the iPod?  Is it any smaller?

The iPod only knows *.m4a, *.m4b and *.m4p files, and *.aac files are a little bit larger due to the ADTS headers for each frame. There's no sound difference between them though.