How to rip CSS-protected DVD to AVI format for DVD backup?
in some senses. LOL. What is behind these data is an equation: File Size = (Video Bit Rate + Audio Bit Rate) * duration /8. If you are perceptive, you would notice this is not an accurate equation and there is small discrepancy between the custom video Bit Rate and the actual video Bit Rate. It is because the Video Bit Rate is vibrant but constant. The actual Video Bit Rate reflects the average of Video Bit Rate. The longer duration of the video is converted, the more approximate the actual Video Bit Rate is to the custom Video Bit Rate.
Take a 2 hour DVD movie for example, you can be assured to count on the custom Video Bit Rate, say 600, with 128kbps Audio Bit Rate to come up with a 650MB AVI video. ((600+128)*7200/8=655200) By doing this, you have reduced the 4GB DVD movie to 1/6 in size!
Of course, DVD backup won’t be a valuable one if it
