@item trellis @var{integer} (@emph{encoding,audio,video})
Set rate-distortion optimal quantization.
-@item sc_factor @var{integer} (@emph{encoding,video})
-Set value multiplied by qscale for each frame and added to
-scene_change_score.
-
@item mv0_threshold @var{integer} (@emph{encoding,video})
@item b_sensitivity @var{integer} (@emph{encoding,video})
Adjust sensitivity of b_frame_strategy 1.