[Matroska-devel] Dirac mapping for Matroska
slhomme at matroska.org
Fri Feb 29 10:39:07 CET 2008
David Schleef wrote:
> Hi all,
> Now that Schroedinger-1.0.0 is out, I'm working on integrating Dirac
> support into other projects. I'd like to get a specification nailed
> down (and a link on the Dirac website) on how to embed a Dirac stream
> into Matroska.
> Dirac is a self-contained stream containing variable sized packets
> containing either pictures or sequence headers. "Self-contained"
> meaning that there is no out-of-band codec data. Decoding can be
> started at any sequence header (e.g., after seeking), and sequence
> headers are encoded periodically by the encoder. Dirac streams are
> constant framerate.
> I implemented the obvious "V_DIRAC" mapping in GStreamer's matroskamux
> and matroskademux elements using V_MPEG2 as an example. It appears to
> work fine, but, uh, that means very little.
> Example of Dirac in Matroska at:
Is there an existing or planned VfW codec planned ?
In which case we should go for that compatibility... And thus nobody has
to change any code. Just support a new VfW ID they will have to anyway...
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