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Old 29th June 2010, 13:06   #3  |  Link
LoRd_MuldeR
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Join Date: Jun 2005
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Asarian, as you are using CRF mode, so you cannot make any assumption about the output size, except that a lower CRF value yields better quality (at the cost of bigger file) and a higher CRF value yields a smaller file (at the cost of reduced quality). Moreover you cannot expect that the same CRF value still gives the same file size, after you changed other options, such as AQ mode! CRF isn't an exact "constant quality" mode. Such mode doesn't exist! The same CRF value will give roughly the same quality for different source (of the same nature), as long as you don't change any other options. But that's it! It's also wrong to believe that using "slower" settings will necessarily result in a smaller file at the same CRF value. Actually the opposite might happen.

If you want to know if AQ mode 1 or AQ mode 2 works better for you, you must visually(!) compare them in 2-Pass mode. And if you do a visual comparison, always make sure you compare files of the same size. Then, after you have decided between AQ mode 1 or AQ mode 2, you can start using your preferred AQ mode in CRF mode. The final step is re-adjusting the CRF value to your needs...
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Last edited by LoRd_MuldeR; 29th June 2010 at 13:11.
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