libaom-3.7.0

[Xi Ruoyao]

New minor version.

[Xi Ruoyao]

2023-08-10 v3.7.0

This release includes new codec interfaces, compression efficiency and perceptual improvements, speedup and memory optimizations and many bug fixes. This release is ABI compatible with the last release.

• New Features
  • New codec controls:
    • AV1E_SET_QUANTIZER_ONE_PASS: Set quantizer for each frame.
    • AV1E_ENABLE_RATE_GUIDE_DELTAQ: enable the rate distribution guided delta quantization in all intra mode. The "enable-rate-guide-deltaq" option is added for this control.
    • AV1E_SET_RATE_DISTRIBUTION_INFO: set the input file for rate distribution used in all intra mode. The "rate-distribution-info" option is added for this control.
    • AV1E_GET_LUMA_CDEF_STRENGTH
    • AV1E_SET_BITRATE_ONE_PASS_CBR
  • AOM_SCALING_MODE is extended to include 2/3 and 1/3 scaling.
  • aom_tune_metric is extended to include AOM_TUNE_VMAF_SALIENCY_MAP. The "tune" option is extended to include "vmaf_saliency_map".
  • SVC example encoder svc_encoder_rtc is able to use the rate control library.
  • Loopfilter level and CDEF filter level is supported by RTC rate control library.
  • New speed (--cpu-used) 11, intended for RTC screen sharing, added for faster encoding with ~3% bdrate loss with 16% IC (instruction count) speedup compared to speed 10.

• Compression Efficiency Improvements
  • Improved VoD encoding performance
    • 0.1-0.6% BDrate gains for encoding speeds 2 to 6
    • Rate control accuracy improvement in VBR mode
  • RTC encoding improvements
    • Screen content mode: 10-19% BDrate gains for speeds 6 - 10
    • Temporal layers video mode, for speed 10:
      • 2 temporal layers on low resolutions: 13-15% BDrate gain
      • 3 temporal layers on VGA/HD: 3-4% BDrate gain

• Perceptual Quality Improvements
  • Fixed multiple block and color artifacts for RTC screen content by
    • Incorporating color into RD cost for IDTX
    • Reducing thresholds for palette mode in non RD mode
    • Allowing more palette mode testing
  • Improved color sensitivity for altref in non-RD mode.
  • Reduced video flickering for temporal layer encoding.

• Speedup and Memory Optimizations
  • Speed up the VoD encoder
    • 2-5% for encoding speed 2 to 4
    • 9-15% for encoding speed 5 to 6
    • ARM
      • Standard bitdepth
        • speed 5: +31%
        • speed 4: +2%
        • speed 3: +9%
        • speed 2: +157%
      • High bitdepth
        • speed 5: +85%
  • RTC speedups
    • Screen content mode
      • 15% IC speedup for speeds 6-8
      • ARM: 7% for speed 9, 3% for speed 10
    • Temporal layers video mode
      • 7% speedup for 3 temporal layers on VGA/HD, for speed 10
    • Single layer video
      • x86: 2% IC speedup for speeds 7-10
      • ARM: 2-4% speedup across speeds 5-10

• Other improvements
  • VoD: Major improvements to global motion estimation, now enabled up to speed 4
  • RTC
    • Fixes to make lossless coding work.
    • Fixes to make frame dropper (--drop_frames) work for single and temporal layers.
    • Improvements to RPS (reference picture selection) recovery frames.
    • Improvements to rate control for temporal layers.
  • libwebm is updated to libwebm-1.0.0.29-9-g1930e3c

• Bug Fixes
  • aomedia:3261 Assertion failed when encoding av1 with film grain and '--monochrome' flag
  • aomedia:3276 ensure all allocations are checked (partial fix)
  • aomedia:3451 The libaom library calls exit()
  • aomedia:3450 enable -Wshadow for C++ sources
  • aomedia:3449 Test Seg Faults After b459af3e345be402db052a143fcc5383d4b74cbd
  • aomedia:3416 prune unused symbols / restrict symbol visibility
  • aomedia:3443 Jenkins failure: UninstantiatedParameterizedTestSuite<EstimateNoiseTest>
  • aomedia:3434 realtime failures with CONFIG_BITSTREAM_DEBUG=1
  • aomedia:3433 DeltaqModeTest crash w/row_mt=0
  • aomedia:3429 Encoder crash when turn on both ExternalResize and g_threads > 2
  • aomedia:3438 Build failure with -DSANITIZE=address -DBUILD_SHARED_LIBS=ON when using clang.
  • aomedia:3435 Block artifacts when scrolling with AV1 in screen sharing scenarios
  • aomedia:3170 vmaf tune presets produce extreme glitches in one scene
  • aomedia:3401 Building shared libaom with MSVC results in a race condition with the export library
  • aomedia:3420 Floating point exception in av1_tpl_get_frame_importance()
  • aomedia:3424 heap-buffer-overflow in ScaleFilterCols_16_C() (SIGABRT)
  • aomedia:3417 examples/svc_encoder_rtc.c is using internal macros and functions
  • aomedia:3372 SEGV in assign_frame_buffer_p av1_common_int.h
  • aomedia:3130 'cpu-features.h' file not found on Android NDK 22
  • aomedia:3415 Encoder/decoder mismatch for svc_encoder_rtc running 1 SL 3 TL
  • aomedia:3412 Lossless Mode Fails Loopback Bit Test
  • aomedia:3409 The use of AV1_VAR_OFFS in av1/encoder/var_based_part.c is incorrect for high bit depths
  • aomedia:3403 test_libaom fails with error message "feenableexcept() failed" on Linux arm
  • aomedia:3370 Random color block at fast motion area
  • aomedia:3393 Assertion failure in av1_convolve_2d_sr_c()
  • aomedia:3392 Strong artifacting for high bit-depth real-time
  • aomedia:3376 aomenc --threads=10 --deltaq-mode=3 crashes after "Allintra: multi-threading of calculating differential contrast"
  • aomedia:3380 Crashes and ASan and TSan errors in deltaq-mode=3 multithreading code
  • chromium:1410766 heap-buffer-overflow in aom_yv12_copy_v_c
  • Cannot set level via AV1E_SET_TARGET_SEQ_LEVEL_IDX
  • Encoding failure due to the use of loop restoration with unintended use of lossless mode.
  • Signed integer overflow in scan_past_frames
  • Signed integer overflow in update_a_sep_sym
  • Flickering in AV1 1440p/2160p HDR transcodes
  • Fixed artifacts with screen share at encoder speed 10
  • Fixed prediction setup for IDTX

[Douglas R. Reno]

Fixed at 9897e559636f81ce15b7c2a2f44019089fc92f1c

I'll have the tests for this run overnight and update the test stats in the morning.

Now back to more updates...