Hello My Batch Render takes very long time.
I make an animation and it has 13300 frames. (for 24fps it's 9.2 minute)

I want to make it a movie clip for youtube HD 720p. I want to use mental ray.
And I choose mental ray on Render Settings Window.
My Options:
Image format: Maya IFF (iff)
Frame/Animation ext: name_#.ext
Start frame: 1
End Frame: 13300

I click to Batch render 8 hours ago but it's done %30 yet!
How can that be??
And I will convert this iff files to avi with a program what is VirtualDub. (%30 rendering and it's size is 9GB!!!)

Is there different a method for rendering quickly as 720p?
how can I render my video quickly?

(Note: My computer is not so bad for this job. AMD 8core, 16GB ram, 2GB 128bit Ati Graphic etc...)