A few months ago, I bought a very large external hard drive. I then proceeded to copy all the dvds in my house onto it, a total of over eighty movies. When copying them over, I chose to keep them in iso format, because it would preserve all the dvd properties and allow me to convert to whatever other format I wanted at a later time. In the months since I copied the movies, I have found that although one can play a movie from the iso file, it is an awkward file type to work with, and I have decided to convert them to a better format. However, the question then arises of what format to use.
I have the following requirements:
-Long movies (3+hours) must be supported
-Subtitles must be supported (and not enforced; they must be toggleable)
-The video and audio must be of high quality with absolutely no danger of desynchronisation (I want a resolution of 800x600 for all of them as a minimum), with fast-paced scenes not stuttering
I have the following preferences, but am flexible with them:
-Filesize should not be too large. I aim to have the average file size less than a gigabyte
-Portability is important. I want to be able to run the movies on another system (potentially a mac) without having to download a whole bunch of things to support them
-A free utility to mass convert them from the isos is preferred. I am able to convert them individually from the isos, or even from the dvds, but I'd rather not.