[Flac] --keep-foreign-metadata question

[Josh Coalson]

--- Martin Leese <martin.leese at stanfordalumni.org> wrote:
> 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.

that's what --keep-foreign-metadata does, it stores every
chunk including the fmt chunk, in order.  even the header
of the data chunk is stored, the only thing left out is the
actual pcm samples in the data chunk.

I just don't know if their fmt variation is legal WAVE; if
not, the current fmt parser probably will choke on it.

Josh



       
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