[Flac] --keep-foreign-metadata question

[Martin Leese]

On 9/26/07, Josh Coalson <xflac at yahoo.com> wrote:

> --- Martin Leese <martin.leese at stanfordalumni.org> wrote:
...
> > Where can I find more detail on what is a
> > "non-audio" RIFF chunk?
>
> it is any riff chunk that is not "fmt " or "data"
>
> > Ambisonic ".amb" files are WAVE-EX files with
> > a non-standard GUID in the 'fmt ' chunk.  I
> > want to work out is this can now be preserved
> > in FLAC files.  (And, I am interested in
> > metadata anyway.)
>
> this is a "fmt " chunk variation that  may or may not be
> handled by flac, depending on the implementation.  I've
> never heard of it before.

If FLAC doesn't store the 'fmt ' chunk verbatim
then it doesn't handle it.  At the moment people
can use WavPack (which does store the 'fmt '
chunk), and in the long term we could register
an ID for a METADATA_BLOCK_APPLICATION.

If you are interested in the ".amb" spec then the
non-standard GUIDs are described at:
http://dream.cs.bath.ac.uk/researchdev/wave-ex/bformat.html

and the rest of the description is at:
http://www.ambisonia.com/Members/mleese/file-format-for-b-format/

There are currently over 100 pieces in the
".amb" format available for free download.
Most are full-sphere surround sound.  Visit
http://www.ambisonia.com/

Regards,
Martin
-- 
Martin J Leese
E-mail: martin.leese at stanfordalumni.org
Web: http://members.tripod.com/martin_leese/