Quote:
Originally Posted by RainyDog
Is --subme tied to RDO in the way that it is in x264?
In x264, --subme 6 upwards have increased levels of RDO. But seems that RDO is its own separate thing in x265 with RD levels 1-6 and rd-refine being a separate switch too.
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Yeah, subme does have some impact on rate control, but --rd is where the action is at.
From x265.readthedocs.io
Quote:
Amount of subpel refinement to perform. The higher the number the more subpel iterations and steps are performed. Default 2
At –subme values larger than 2, chroma residual cost is included in all subpel refinement steps and chroma residual is included in all motion estimation decisions (selecting the best reference picture in each list, and chosing between merge, uni-directional motion and bi-directional motion). The ‘slow’ preset is the first preset to enable the use of chroma residual.
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