2 ish hours give or take. I use higher settings than the apple tv preset and they finish around that i think, and thats doing 3 at a time.
You keep on looking for specific information like theres someone here who can give you exact numbers and benchmarks for a varying situation that you aren't clear in defining.
Different movies are different lengths. Different settings take different amounts of time.
In your other thread you said you had a number of dvds to encode.
Is this, 30, 50, hundreds? Is it just encoding netflix/blockbuster movies as they come in?
For personal use if you just want to encode a movie at a time an imac like you had mentioned in your other thread a couple hours ago will be fine, and save you money.
Once again, a mac pro will is not signifigantly faster over an imac for one encode at a time considering the difference in price.
If you want to run 2 or more encodes at once or still use the computer for other tasks without any real slowdown while encoding a mac pro will blow away what an imac or mac mini is capable of. Only one instance of handbrake will not take advantage of all a mac pro can do.
But if theres only a finite number of encodes to be performed and theres no actual reason for a rush does it matter? You'll finish eventually, and then you'll have an extra grand or two sitting idle waiting for more dvds. Rip them to your hard drive, que up a few while you sleep, a few while you're at work/school/etc during the day, whatever. Does a half hour or so difference in encode time matter when you don't have to sit there at the computer while it works?