[M4IF Technotes] X3D/XMT compatibility

[Lyndon J B Nixon]

>
>
>     I have already made a test-3d scene and exported it to vrml...than
>     I converted it to x3d..
>     The next steps would be to make a xmt file out of the x3d file,
>     than to get bif out of this and than finaly get a mp4 scene...
>
If its only important to you to get from the vrml to mpeg-4, you should 
note that vrml and the bifs textual format are
almost exactly the same and you dont need to take this route via XML 
representations at all.
If I remember correctly, with bifsenc you need to remove the first line 
(the vrml header) and then you can pass that file to
the encoder. There are some syntactic differences between vrml/bifs but 
I guess encoder error messages can help you with that.
To get to the actual mp4 file you'll need to generate a mux file of 
course referencing the generated bif file and passing it through the 
mp4enc.
lyndon