Adobe use ' fruanhofer and thompson' .., Avid.. dont know??.., final cut pro uses .., quicktime conversion compression.., its all mpeg 4 though for DVD. you could try 'shrink 3.2' that is not bad for a free piece of software. the others cost a lot.., i use them all and have no problem with shrink.., not my first choice.., premier is good and gives a huge range of conversion presets.., better is FCP which also has a huge range of presets.. (the FCP suite ships with DVD pro, which is also good), they all have presets.., its all mpeg 4 for DVD.., thats a standard codec I think.., others would include GPP3 for mobile phone ect.., I think its just a standard codex with bit rate variables and differant number of passes for different quality and compression (size of file verses disc space).., nothing special??
you might get a more direct answer from one of the moderators.., I think tubby is the tech guy on this site??
take it easy and life will be easy