Hi There
        Thanks for the suggestions - I think I've got things sorted now.

Following your suggestions I installed the Rockbox simulator (didn't know
about that, thanks) - I actually ran it under Virtualbox on my Gentoo Linux
box. I also installed mediainfo, and learned a few things:

- the .aac files that get_iplayer downloads seem to be 'raw' aac files. I
gather that Rockbox can't normally play these.

- the ffmpeg command I was using wasn't creating a genuine mp4 container for
the .aac content. I haven't been able to discover whether this is sdown to my
misuse, or a deficiency in ffmpeg.

- the application MP4Box (available on Liux at least) can be successfully used
to put the .aac files into an mp4 container:

MP4Box -new -add myfile.aac myfile.mp4

using this I have been able to create .mp4 files which play happily on the
Rockbox. I am very pleased...

    Thanks again
    J^n
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Received on 2011-03-08