x264 --fullhelp
-i, --min-keyint Minimum GOP size [2]
--direct Direct MV prediction mode ["spatial"]
- none, spatial, temporal, auto
--weightp Weighted prediction for P-frames [0]
- 0: Disabled
- 1: Blind offset
- 2: Smart analysis
--constrained-intraEnable constrained intra prediction.
--sliced-threads Low-latency but lower-efficiency threading