[linux-audio-dev] file format

Eric Dantan Rzewnicki rzewnickie at rfa.org
Tue Oct 11 16:11:42 UTC 2005


On Tue, Oct 11, 2005 at 02:20:30PM +0200, Lars Luthman wrote:
> On Tue, 2005-10-11 at 01:02 +0200, fons adriaensen wrote:
> > Hi all,
> > 
> > For one of my current projects (to be presented at LAC2006) I'm
> > looking for a suitable file format.
> > 
> > Each file should contain:
> > 
> > - A number of short (+/- 10 seconds) chunks of PCM audio. The number
> >   of channels will be different in each chunk. The only sample format
> >   required is single precision floating point. For multi-channel
> >   chunks, non-interleaved is preferred. All chunks will normally use
> >   the same sample frequency.
> > 
> > - Metadata, both numerical and textual. The format should allow to
> >   have several chunks of these, and to add new ones later without
> >   breaking compatibility (i.e. readers will ignore parts they do
> >   not understand). 
> > 
> > There is no need for the audio to be usable with normal players -
> > it's not meant to be listened to directly.
> > 
> > Is there any standard file/container format that would provide for
> > this sort of thing ? I've been looking at ogg, but it's a bit over
> > the top - I don't need any streaming features. 
> 
> Both WAVE and AIFF are (R)IFF based, so you can put any 'chunks' of
> arbitrary data in them and they will still be valid WAVE or AIFF files.

Which is why I suggested broadcast wav and cart chunk as those are
simply standardised 'chunks'.


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