v2.2.0

uvg266

We now also have a VVC encoder called uvg266, which is available at github/uvg266. The majority of future development will go towards uvg266 but do not consider Kvazaar to be abandoned!

Features

• Updated Region of Interest (ROI) functionality to allow separate ROI map for each frame
• Improve inter search
• Update cabac context during search to improve the accuracy of bit cost estimation
• Move intra chroma search option from --rd 3 to its own option --(no-)intra-chroma-search and fast bipred to --(no-)fast-bipred
• Change maximum rd level to 4, where 3 performs more rd search for inter and 4 performs full intra search
• Add --(no-)combine-intra-cus for controlling whether the larger intra blocks are tried even when search at current depth is disabled
• Add --force-inter for debugging purposes to force all PUs in inter slices to use best inter mode

Optimizations

• AVX2 implementations of bidirectional blending

Fixes

• Make sure the dpb is more than max_num_reorder_pics 899c672
• Compute proper count of buffered frames for vps and sps. Use common function d4880be
• Fix some strategy function pointer signatures a400504

External contributors

• build: fix automake warning by @bradh in #335
• cli: add missing newlines in usage by @bradh in #336
• refactor SEI by @bradh in #341
• cli: minor api doc fix by @bradh in #342
• add sudo ldconfig by @binbinzhm in #345
• Enable -mpopcnt and -mlzcnt on AVX2 by @klondi in #301

New Contributors

• @bradh made their first contribution in #335
• @binbinzhm made their first contribution in #345
• @klondi made their first contribution in #301

Performance

BD-Bitrate

Average BD-Bitrate compared with v2.1:

class	0-uf	1-sf	2-vf	3-fr	4-f	5-m	6-s	7-sr	8-vs
hevc-A	0.4 %	0.7 %	0.0 %	-0.1 %	0.0 %	-1.1 %	-0.8 %	0.2 %	-5.1 %
hevc-B	0.3 %	0.4 %	-0.3 %	-0.6 %	-0.4 %	-1.7 %	-1.2 %	0.1 %	-7.1 %
hevc-C	0.5 %	1.1 %	0.7 %	0.5 %	0.2 %	-0.8 %	-0.4 %	0.4 %	-5.5 %
hevc-D	0.4 %	1.5 %	1.0 %	0.6 %	0.7 %	-0.3 %	-0.1 %	0.4 %	-6.6 %
hevc-E	-2.1 %	-1.7 %	-2.2 %	-2.5 %	-2.5 %	-1.4 %	-1.1 %	-1.1 %	-5.4 %
hevc-F	-0.1 %	0.2 %	-0.2 %	-0.2 %	-0.3 %	-0.6 %	-0.4 %	0.1 %	-3.1 %
total	0.0 %	0.4 %	-0.1 %	-0.3 %	-0.3 %	-1.0 %	-0.7 %	0.0 %	-5.6 %

Speedup

Average speedup compared with v2.1 on an Intel Xeon W-2145 (8-core) machine:

class	0-uf	1-sf	2-vf	3-fr	4-f	5-m	6-s	7-sr	8-vs
hevc-A	1.09x	1.10x	1.12x	1.14x	1.15x	1.08x	1.04x	1.10x	0.68x
hevc-B	1.10x	1.09x	1.15x	1.15x	1.15x	1.09x	1.07x	1.14x	0.66x
hevc-C	1.11x	1.06x	1.11x	1.14x	1.14x	1.07x	1.08x	1.03x	0.75x
hevc-D	1.08x	1.08x	1.13x	1.13x	1.14x	1.08x	1.08x	1.06x	0.71x
hevc-E	1.07x	1.08x	1.11x	1.14x	1.14x	1.08x	1.10x	1.12x	0.62x
hevc-F	1.10x	1.05x	1.07x	1.09x	1.08x	1.05x	1.05x	1.02x	0.67x
total	1.09x	1.08x	1.12x	1.13x	1.13x	1.08x	1.07x	1.08x	0.68x

Full Changelog: v2.1.0...v2.2.0