[PATCH] Output AAC as M4A for iTunes with metadata tags

[richard]

On 31 Mar 2011 15:34:12, Jon Davies wrote:

>
> I don't have an ipod and itunes to hand, but for a test file I do have
> here mp4info reports different things. note the kbps in the audio
> track... ?it suggests (as I think we're establishing) that ffmpeg
> mangles the metadata atoms in a way that makes them inconsistent with
> what's actually in the file.  The ffmpeg patch did something in the
> textual metadata, it looks like there's another bug in the atom(s)
> that describe the audio stream.

> ffmpeg-current aac -> m4a:
> mp4info version 1.6
> 1 ? ? ? audio ? MPEG-4 AAC LC, 5400.102 secs, 0 kbps, 44100 Hz
>
> MP4Box raw aac -> m4a:
> mp4info version 1.6
> foo2a.m4a:
> 1 ? ? ? audio ? MPEG-4 AAC LC, 5400.032 secs, 128 kbps, 44100 Hz
>
> MP4Box raw aac -> m4a followed by AtomicParsley to add a couple of 
> tags:
> mp4info version 1.6
> foo2b.m4a:
> 1 ? ? ? audio ? MPEG-4 AAC LC, 5400.032 secs, 128 kbps, 44100 Hz

That is what EasyTag seemed to suggest. The bitrates becomes weird.

@ Jon
Is ffmpeg-current aac -> m4a the patched or unpatched version of ffmpeg?