X265 is a commandline encoder for creating H.265/High Efficiency Video Coding (HEVC) video streams.

x265 supports the following features: * full prediction and transform quad-tree recursion supported * adaptive B-frame placement * B-frames as references / arbitrary frame order * CABAC (context-based adaptive binary arithmetic coding) entropy coding * supports all Intra block types * supports all Inter P partitions * supports all Inter B partitions from 64x64 down to 8x4 * weighted prediction for P slices * multiple reference frames * scenecut detection * parallel encoding on multiple CPUs