[FFmpeg-devel] 3D WebM/Matroska tags inclusion

Alok Ahuja waveletcoeff
Thu Nov 4 07:25:07 CET 2010

Hi Jason,

The Matroska tags have specification for packed S3D which includes
top-bottom case you mentioned as well as side-by-side and other packed
formats. This will be the most common implementation scenario as it is
currently being used for 3D streaming events and online content.

3D WebM should definitely become a reality as I noted with the example of
Firefox adoption.

Could we consider adding some command-line options for encoding 3d webm
content? If so, any specific pointers to the code would be appreciated. Will
try to create a patch for review.


On Wed, Nov 3, 2010 at 10:04 PM, Jason Garrett-Glaser <darkshikari at gmail.com
> wrote:

> On Wed, Nov 3, 2010 at 9:36 PM, Alok Ahuja <waveletcoeff at gmail.com> wrote:
> > Hi,
> >
> > There has been a recent standardization effort for Stereoscopic 3D in
> > Matroska and WebM. A few tags are now already part of the Matroska spec
> (See
> > http://www.matroska.org/technical/specs/index.html#StereoMode)
> >
> > and their adoption in WebM spec is under consideration with a high
> > likelihood of being accepted. I would love to know the thoughts of
> everyone
> > here in considering adding 3D WebM tags' support in ffmpeg specifically
> for
> > encoding of 3D WebM content. Just as a background, there is another
> effort
> > underway at Mozilla to add 3D WebM decoding into the next release of
> > Firefox. The use case is to allow 3D WebM playback utilizing HTML5 video
> tag
> > and using various S3D rendering technologies.
> We've had the H.264 Frame Packing SEI for ages now; as far as I can
> tell, no real people actually care enough to want it...
> I assume these Matroska tags allow us to e.g. have a 1920*2160 image,
> the top half of which is one view and the bottom half of which is
> another view?  Because that's the sensible way to do it.
> Dark Shikari
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