What is MaxQuantDelta?

[Chengbin]

In AutoMKV's profile, there was an option called MaxQuantDelta. It is set to 4. It seems like if I set it to 0, bitrate approximately double, and the value of qcomp don't seem to matter. What does it do?

[Sharktooth]

it should be the qpstep parameter.
it means the maximum quantizer value difference between consecutive frames.
more info on mewiki: http://mewiki.project357.com/wiki/X264_Settings#qpstep
obviously setting that parameter to zero will completely screw up ratecontrol... that also means it's better you leave untouched options you dont understand or dont know.

[Audionut]

http://forum.doom9.org/showthread.php?t=143224&highlight=ratecontrol