Lambda tables for 8, 10, and 12-bit encoding revised, resulting in significant enhancement to subjective visual quality.Dynamic metadata may be either supplied as a bitstream via the userSEI field of x265_picture, or as a json jile that can be parsed by x265 and inserted into the bitstream use -dhdr10-info to specify json file name, and -dhdr10-opt to enable optimization of inserting tone-map information only at IDR frames, or when the tone map information changes. x86inc.asm cleaned-up for improved instruction handling.Refer to documentation of -csv for details of all fields. The CSV log is now more elaborate with additional fields such as PU statistics, average-min-max luma and chroma values, etc.SEA motion search receives a 10% performance boost from AVX2 optimization of its kernels.Enable ENABLE_HDR10_PLUS in CMake options and build to generate this library. Other libraries that wish to use this API may do so by linking against this library. x265 can now generate a seprate library that exports the HDR10+ parsing API.Consequently, applications that invoke multiple instances of x265 library are no longer restricted to use the same settings for these parameter options across the multiple instances. Globals that track min and max CU sizes, number of slices, and other parameters have now been moved into instance-specific variables.Applications that integrate libx265 can now extract frame level statistics for their encodes by exercising this option in the library. CSV logging feature (enabled by -csv) is now part of the library it was previously part of the x265 application.The mapping was also adjusted to improve quality of the encodes with minimal impact to performance. Frame threads are now decided based on number of threads specified in the -pools, as opposed to the number of hardware threads available.

Improved grain handling with -tune grain option by throttling VBV operations to limit QP jumps.

The frame level VMAF score does not include temporal scores.

VMAF (Video Multi-Method Assessment Fusion)Р”Р„dded VMAF support for objective quality measurement of a video sequence.Р”В®nable cmake option ENABLE_LIBVMAF to report per frame and aggregate VMAF score.

It represents the percentage of maximum AU size used.

-max-ausize-factor controls the maximum AU size defined in HEVC specification.

-single-sei Encode SEI messages in a single NAL unit instead of multiple NAL units.

It is recommended to use :option: `РІР‚вЂњrefine-intra 4РІР‚в„ў with dynamic refinement for a better trade-off between encode efficiency and performance than using static refinement.

-dynamic-refine dynamically switches between different inter refine levels.

For 4K main10 high-quality encoding, we are seeing good gains for other resolutions and presets, we donРІР‚в„ўt recommend using this setting for now.

-asm avx512 used to enable AVX-512 in x265.

The minimum variance of sub-unit in each coding unit to represent the coding unitРІР‚в„ўs spatial complexity.

Experimental feature option:: РІР‚ВРІР‚вЂњhevc-aqРІР‚в„ў enables adaptive quantization It scales the quantization step size according to the spatial activity of one coding unit relative to frame average spatial activity.

option:: РІР‚ВРІР‚вЂњrefine-ctu-distortion РІР‚в„ў store/normalize ctu distortion in analysis-save/load.

option:: РІР‚ВРІР‚вЂњqp-adaptation-rangeРІР‚в„ў Delta-QP range by QP adaptation based on a psycho-visual model.

option:: РІР‚ВРІР‚вЂњzonefile РІР‚в„ў specifies a text file which contains the boundaries of the zones where each of zones are configurable.

The library will interleave access units with RPUs in the bitstream. If given, x265РІР‚в„ўs Dolby Vision metadata parser will fill the RPU field of input pictures with the metadata read from the file.

option:: РІР‚ВРІР‚вЂњdolby-vision-rpuРІР‚в„ў File containing Dolby Vision RPU metadata.

Currently profile 5, profile 8.1 and profile 8.2 enabled, Default 0 (disabled)

option:: РІР‚ВРІР‚вЂњdolby-vision-profile РІР‚в„ў generates bitstreams confirming to the specified Dolby Vision profile.

Error when encoding platinum notes