• major efficiency improvement for faster, minor speedups for fast and medium
• allowing separate encoding of first and second pass in 2pRC (using a statistics data file)
• improvements to single picture and low-rate rate-control
• added support for packed 10 bit YUVs
• added a balanced IDR refresh mode (using IDR_W_RADL in first intra period)
• improvements to ALF, DMVR, error handling and others
• various fixes and cleanups