Hi all,

This is a semi-useless response, apart from to give some confidence to you 
Arthur about whether this works.

I only use get_iplayer to download comedy of of R4 and R4 Extra.  Part of that 
process is running ffmpeg to get it to a point where it works in iTunes/on my 
iPhone, although I do have to manually change the MP3 tags.  This is, however, 
on Windows.

So - persevere - it does work!  :-)

Matt

On 24 Jul 2011, at 19:31, dinkypumpkin wrote:

> On 24/07/2011 18:04, Arthur Dent wrote:
>> I saw a posting from Jon Davies with a script "fixupm4a.sh" which seemed
>> to be just what I am looking for. Unfortunately it seems to rely on
>> mp4tags (which I have found comes with libmp4v2 on Fedora) and
>> mp4creator which is just not available (that I can find) on Fedora.
> 
> That script doesn't do the actual conversion of AAC files.  It was written to 
> deal with hardware that couldn't play the M4A files written by ffmpeg 
> available at the time.  The script works around the problem by forcing a 
> re-optimisation of the file. See Jon's explanation in the message to which 
> the script is attached. I think the problem may have been corrected in ffmpeg 
> shortly after.
> 
> The basic ffmpeg command to convert a file is:
> 
> ffmpeg -i x.aac -vn -acodec copy -absf aac_adtstoasc -y x.m4a
> 
> I believe we established that ffmpeg from the 0.6 branch produces files that 
> don't work with iTunes.  If that's what you have, you'll probably need to 
> find a more recent version.  The latest release version (0.8) works OK.
> 
> BTW, if it should prove necessary, the mp4file utility that is part of the 
> mp4v2 distribution can replace mp4creator, at least for optimisation 
> purposes.  I'm not a Fedoran, so I'm not sure which RPM you would find it 
> lurking in.
> 
> 
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