This factor influences the resolution selection of the per-title algorithm. The default value is 0.0. negative values will lead to results where the algorithm will choose lower resolutions for given bitrates. A positive value will result in higher resolutions to be selected. The range of the factor is -5.0 to +5.0. Please note that changing this factor might also lead to slightly different bitrate selection by the algorithm.
Signature
public function resolutionScaleFactor(float
$resolutionScaleFactor )