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View Full Version : Min Width feature ?


Defenestration
14th July 2006, 09:58
I normally use Auto Width with a Custom output size, but thought the resolution of one of my encoded files was too low (304x224x12). Because of this I re-encoded the same file with the same settings, apart from using Min Width which was set to 400. I was expecting the Data rate to decrease to compensate for the increased resolution, but to my surprise the resultant file has the same data rate, bit rate, and size, but the resolution was apparently increased (according to the information stored in the file).

How can the resolution be increased without reducing either the data rate, bit rate or size ?

BigDid
14th July 2006, 17:57
... How can the resolution be increased without reducing either the data rate, bit rate or size ?
:) Cause it has different average quantizer.
You can verify that using Drfanalyser on your 2 encodes, note that lower Q is better (down to 2); under 2 is overkill with xvid; AGK resulting Q for good quality usually varies between 4 to 3.
Last point the Q can be raised with no "visual" differences IF there no or few motion scenes; with motion and higher Q you can get macroblocks.
Lots of details on quantizer(s) in different threads :search:

Did