[theora] Join two theora video files

[yorn at gmx.net]

> I have a question which, maybe, could go to the Theora FAQ.
> 
> How can I join two theora video files in one without recompressing them?
> Can I just join them one after the other, like with Ogg/Vorbis?

Yes, this is possible under some conditions:
1) Every part must begin with a keyframe
2) Every part must be equal in it's encoder configuration

However you have to care for the process to mux the created video packet into an ogg stream/file.

-Yorn