Encoder

Improve the tradeoffs for the random access mode across presets: Speedup CRF presets M6 to M0 by 17-53% while maintaining similar quality levels Re-adjust CRF presets M7 to M13 for better quality with BD-rate gains ranging from 1-4% Improve the quality and speed of the 1-pass VBR mode Improve Multi Pass VBR algorithm for better quality with BD-rate gains of ~3% on average More details on the per preset improvements can be found in MR !2143

Add API allowing to update bitrate / CRF and Key_frame placement during the encoding session for CBR lowdelay mode and CRF Random Access mode ARM Neon SIMD optimizations for most critical kernels allowing for a 4.5-8x fps speedup vs the c implementation

Cleanup and bug fixes and documentation

Various cleanups and functional bug fixes Update the documentation for preset options and individual features