Not sure if this belongs here or in flac-dev.
I am subscribed to both, so flop it over if fits
better over there.
Looking at the Changelog for FLAC 1.2.1
(17-Sep-2007), it says:
"With the new --keep-foreign-metadata in
flac, non-audio RIFF and AIFF chunks can
be stored in FLAC files and recreated when
decoding."
Where can I find more detail on what is a
"non-audio" RIFF chunk?
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.)
Many thanks,
Martin
--
Martin J Leese
E-mail: martin.leese@stanfordalumni.org
Web: http://members.tripod.com/martin_leese/
--- Martin Leese <martin.leese@stanfordalumni.org> wrote:> Not sure if this belongs here or in flac-dev. > I am subscribed to both, so flop it over if fits > better over there. > > Looking at the Changelog for FLAC 1.2.1 > (17-Sep-2007), it says: > "With the new --keep-foreign-metadata in > flac, non-audio RIFF and AIFF chunks can > be stored in FLAC files and recreated when > decoding." > > 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. Josh ____________________________________________________________________________________ Don't let your dream ride pass you by. Make it a reality with Yahoo! Autos. http://autos.yahoo.com/index.html
On 9/26/07, Josh Coalson <xflac@yahoo.com> wrote:> --- Martin Leese <martin.leese@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@stanfordalumni.org Web: http://members.tripod.com/martin_leese/