We get the same questions over and over again asking us to explain what DVD2AVI is telling you, and what you should do with that information. This is difficult stuff. It is also very important stuff. Your encode can be turn out well, or it can be ruined by what you decide to do in the very early stages of creating .d2v projects and .avs scripts.
The real heart of this tutorial has been already supplied by hakko504. After it was written and became a Sticky in the DVD2AVI Forum, many people, still unclear about things, added questions which were graciously answered by hakko504. But in the process, the Sticky became muddled and difficult to wade through.
It's being cleaned up a bit, with other contributions by jggimi and manono, in the hopes that by doing this, all the questions (or most anyway) concerning video stream formats will be answered.
Most of the information will apply to those working with NTSC material. But there is also enough for those of you with PAL discs to aid you in making sound decisions. Also much will also be directed towards users of Gordian Knot, since its procedures include both DVD2AVI and AviSynth.
We'll start with hakko504's main contribution.