I had worked on x265 HEVC encoder during my tenure in MulticoreWare Inc. My Masters thesis in KTH Royal Institute of Technology was based on multi-encoding using x265 (More details). I use x265 for my research in various topics.
My contributions to x265 (2016-2018) are as follows:
- AVX512 assembly acceleration of x265
- API to reconfigure quantization matrices during encoding
- Scalinglists support for YUV444 videos
- SEA motion search algorithm implementation [algorithm details here]
- Influence depth decisions based on CTU information received through API
- Force modes or qp based on the CTU information received through API
- AVX2 assembly optimization of SEA motion search kernels
- Add support for NASM assembler