deb40d1623
v3.4.0 This release includes compression efficiency and perceptual quality improvements, speedup and memory optimizations, and some new features. There are no ABI or API breaking changes in this release. - New Features * New --dist-metric flag with "qm-psnr" value to use quantization matrices in the distortion computation for RD search. The default value is "psnr". * New command line option "--auto-intra-tools-off=1" to make all-intra encoding faster for high bit rate under "--deltaq-mode=3" mode. * New rate control library aom_av1_rc for real-time hardware encoders. Supports CBR for both one spatial layer and SVC. * New image format AOM_IMG_FMT_NV12 can be used as input to the encoder. The presence of AOM_IMG_FMT_NV12 can be detected at compile time by checking if the macro AOM_HAVE_IMG_FMT_NV12 is defined. * New codec controls for the encoder: o AV1E_SET_AUTO_INTRA_TOOLS_OFF. Only in effect if --deltaq-mode=3. o AV1E_SET_RTC_EXTERNAL_RC o AV1E_SET_FP_MT. Only supported if libaom is built with -DCONFIG_FRAME_PARALLEL_ENCODE=1. o AV1E_GET_TARGET_SEQ_LEVEL_IDX * New key-value pairs for the key-value API: o --auto-intra-tools-off=0 (default) or 1. Only in effect if --deltaq-mode=3. o --strict-level-conformance=0 (default) or 1 o --fp-mt=0 (default) or 1. Only supported if libaom is built with -DCONFIG_FRAME_PARALLEL_ENCODE=1. * New aomenc options (not supported by the key-value API): o --nv12 - Compression Efficiency Improvements * Correctly calculate SSE for high bitdepth in skip mode, 0.2% to 0.6% coding gain. * RTC at speed 9/10: BD-rate gain of ~4/5% * RTC screen content coding: many improvements for real-time screen at speed 10 (quality, speedup, and rate control), up to high resolutions (1080p). * RTC-SVC: fixes to make intra-only frames work for spatial layers. * RTC-SVC: quality improvements for temporal layers. * AV1 RT: A new passive rate control strategy for screen content, an average of 7.5% coding gain, with some clips of 20+%. The feature is turned off by default due to higher bit rate variation. - Perceptual Quality Improvements * RTC: Visual quality improvements for high speeds (9/10) * Improvements in coding quality for all intra mode - Speedup and Memory Optimizations * ~10% speedup in good quality mode encoding. * ~7% heap memory reduction in good quality encoding mode for speed 5 and 6. * Ongoing improvements to intra-frame encoding performance on Arm * Faster encoding speed for "--deltaq-mode=3" mode. * ~10% speedup for speed 5/6, ~15% speedup for speed 7/8, and ~10% speedup for speed 9/10 in real time encoding mode * ~20% heap memory reduction in still-picture encoding mode for 360p-720p resolutions with multiple threads * ~13% speedup for speed 6 and ~12% speedup for speed 9 in still-picture encoding mode. * Optimizations to improve multi-thread efficiency for still-picture encoding mode. - Bug Fixes |
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