[Mp4-tech] question concerning bifstext

[Jean-Claude Dufourd]

Hi Bernhard
Bernhard Lang wrote:
> we are a group of students in Austria, who are currently working on a 
> MPEG4 project. we want to convert our VRML2 file into bifstext. Is it 
> possible, that there are nodes that are not supported in bifstext (e.g. 
> IndexedFaceSet)? when we produce a rectangle with
> Shape {
>      geometry Rectangle {
>     size 50.0 40.0
>      }
>    }
> it works and we can see it on the player. (we are using both the envivio 
> plugin and the osmo4player to view our MPEG4-files.)

Because Rectangle is a 2D node
> but when we export our 3d scene from 3dsmax/softimage/cinema4D the 
> generated vrml code contains
> geometry IndexedFaceSet {
>            coord Coordinate { point [
>              # points 26
>              here are the coordinates]
>            }}
> we can convert the bifstext file to a mpeg4 file using mp4tool by ENST 
> but we don't see the objects in both players.

Because IndexedFaceSet is a 3D node...
You need a 3D player for what you are trying to do.
A free one (but not fast) is the reference software, an exe of which you 
can download from:
http://www-artemis.int-evry.fr/~preda/MPEG-4/
Octaga has a 3D MPEG-4 player that does not implement ODs (so it is not 
really MPEG-4).
BitManagement has a 3D MPEG-4 player with ODs, and mp4tool was created 
in the same project (SoNG) so they are compatible.
However, neither is free.
Good luck
JC