As BigDid already mentioned, your questions have all been asked and answered many times over, but I will give you a synopsis of some of the answers. 1) Audio selection (i. e. choice of original AC3 or MP3) is a matter of filesize and quality. VBR MP3 at 128 kb/s is a common choice and is more than adequate for most TV series. The primary reason most people choose original AC3 is because it can contain 5.1 surround, something most TV shows don't have. If Veronica Mars does, and you intend to take advantage of it, then keep the original audio. If not, use MP3. 2) File size selection is purely a matter of personal preference, and is also dependent on the chosen resolution. An example I can give you would be 640 x 356: if you choose that resolution and use 320MB file sizes, you'll probably have artifacts (large blocks of same color) in your encodes in scenes with high motion or lots of similar color such as smoke or fog. If you dropped them to 576 x 320 the same file size would probably have no artifacts, but you would lose some detail. All I can suggest is my own preference, which is to fit a season on two DVD's. Veronica Mars season 1 is 22 episodes, or 11 eps per disk, giving you about 400MB per episode. Encode one at that size and choose a resolution that suits it, and if it's not to your liking you can either change the resolution or the filesize. Yet another option is to use the quality setting, but you lose the ability to control the filesize. 3) Progressive or interlaced isn't of concern with AutoGK - the "auto" part takes care of that for you.