Features

There are no major new features, but several fixes, most notably to 10 bit encoding and cost calculation for smp and amp blocks. Due to the fixes to amp cost calculation, amp is now enabled on veryslow preset.

Impact of fixes on the old veryslow preset | Sequences| BD-BR (PSNR) | BD-BR (SSIM) | Speed | |------------|--------------------------|--------------------------|-----------------------------| | hevc-A | -1.2 % | -1.4 % | 0.96× | | hevc-B | -1.4 % | -1.6 % | 0.97× | | hevc-C | -1.2 % | -1.4 % | 0.97× | | hevc-D | -1.3 % | -1.6 % | 0.98× | | hevc-E | -0.9 % | -1.0 % | 1.00× | | hevc-F | -1.1 % | -1.4 % | 0.98× | | Overall|-1.2 % | -1.4 % | 0.98× |

Veryslow of v2.3.1 vs v2.3.2 | Sequences| BD-BR (PSNR) | BD-BR (SSIM) | Speed | |--------------|--------------------------|--------------------------|-----------------------------| | hevc-A | -3.1 % | -3.5 % | 0.69× | | hevc-B | -3.0 % | -3.2 % | 0.72× | | hevc-C | -2.9 % | -3.3 % | 0.78× | | hevc-D | -2.9 % | -3.3 % | 0.82× | | hevc-E | -2.3 % | -2.1 % | 0.83× | | hevc-F | -2.4 % | -2.8 % | 0.79× | | Overall| -2.7 % | -3.0 % | 0.77× |

To other presets the impact of fixes is smaller

Fixes

• Several fixes to 10 bit encoding
• Fix SATD calculation 36f7752d515aba01b9ba7f0a1d1fab6cb9d647a9
• Ensure proper stack size 1eeccb3c98da95601cff74849d24a14e98f4c56b
• Fix typing for threadwrapper a7aeb2361f8d1e5dc575d05c9ab563f47bdcd235
• Separate .pdb files for exe and library ccc643c8d2c1b5950c3bbd3e0f9ac50d7997acc9
• Fix y4m reading 4aeeba73e151d9c9878961f4de11ccbb5aaf29fd b8d918548d8928500e2f9f9516865c10a91993d4
• Update minimum CMake version 3393d56002237c780034be495c5346151268b742
• Fix --no-early-skip d1e11d84570bcc9c813ac251b4e764b5790b6852
• Fix lossless incorrectly selecting skip d1e11d84570bcc9c813ac251b4e764b5790b6852
• Rate control improvements 526c8db10e263719532afe6b0d01cf570a5d1b20 999c51252e4d6d3e70e0eab1efa9b71bd6345904
• Fix bit cost calculation for tr splits and smp 6957ceab9c104abcb529d3883bbd8221401dc6af
• Update the default configuration to match the medium preset 3eed14d590216a3aa544f0b0b09d2449021b9693

External contributions

• add missing files in distribution for compilation with cmake by @vtorri in https://github.com/ultravideo/kvazaar/pull/402
• encmain.c: guard WINVER and _WIN32_WINNT macros by @vtorri in https://github.com/ultravideo/kvazaar/pull/405
• ax_pthread/clang: move -pthread to LIBS by @1480c1 in https://github.com/ultravideo/kvazaar/pull/407
• fix ios build by @trittsv in https://github.com/ultravideo/kvazaar/pull/416
• fix android build by @trittsv in https://github.com/ultravideo/kvazaar/pull/415
• Fix Windows ARM64 builds when using MSVC by @anthony-linaro in https://github.com/ultravideo/kvazaar/pull/419
• Fix emscripten build by @meowtec in https://github.com/ultravideo/kvazaar/pull/422
• Add BSDs to exclusion list for compiler flag with cmake by @rhelmot in https://github.com/ultravideo/kvazaar/pull/426
• Avoid double free of roi.file_path by @bart-kroon in https://github.com/ultravideo/kvazaar/pull/428
• Fix passing too many arguments to "init_test_strategies". by @fancycode in https://github.com/ultravideo/kvazaar/pull/440

New Contributors

• @vtorri made their first contribution in https://github.com/ultravideo/kvazaar/pull/402
• @1480c1 made their first contribution in https://github.com/ultravideo/kvazaar/pull/407
• @trittsv made their first contribution in https://github.com/ultravideo/kvazaar/pull/416
• @anthony-linaro made their first contribution in https://github.com/ultravideo/kvazaar/pull/419
• @meowtec made their first contribution in https://github.com/ultravideo/kvazaar/pull/422
• @rhelmot made their first contribution in https://github.com/ultravideo/kvazaar/pull/426
• @bart-kroon made their first contribution in https://github.com/ultravideo/kvazaar/pull/428

Full Changelog: https://github.com/ultravideo/kvazaar/compare/v2.3.1...v2.3.2