hq_ac option?

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hq_ac option?

Tobias Brockamp
Hi everybody,

in the mencoder documentation about xvid encoding i found an option  
called "hq_ac":

"hq_ac Activates a better coefficient cost estimation method, which  
slightly reduces filesize by around 0.15 to 0.19% (which corresponds  
to less than 0.01dB PSNR increase), while having a negligible impact  
on speed. It is therefore recommended to always leave it on."

Can i find something like that in ffmpeg too? Could it be "-coder ac"?

Kind regards,

Tobias Brockamp
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