Convert VDR Files


is it possible to load and convert VDR video files (like from Reelbox Avantgarde) directly with DivX converter ? So far I'm using the detour via an MPEG file, but I'm wondering of this is necessary.
I also tried Dr.DivX, it can load the VDR file, but for some reason it's not converting successful - or spoemthing is wrong with the installation.