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- 2021-10-13 v3.2.0
- This release includes compression efficiency and perceptual quality
- improvements, speedup and memory optimizations, as well as some new
- features.
- - New Features
- * Introduced speeds 7, 8, and 9 for all intra mode.
- * Introduced speed 10 for real time mode.
- * Introduced an API that allows external partition decisions.
- * SVC: added support for compound prediction.
- * SVC: added support for fixed SVC modes.
- - Compression Efficiency Improvements
- * Intra-mode search improvement.
- * Improved real time (RT) mode BDrate savings by ~5% (RT speed 5)
- and ~12% (RT speed 6). The improvement was measured on the video
- conference set.
- * Improved real time mode for nonrd path (speed 7, 8, 9): BDrate
- gains of ~3-5%.
- * Rate control and RD adjustments based on ML research in VP9.
- Gains of ~0.5-1.0% for HD.
- - Perceptual Quality Improvements
- * Added a new mode --deltaq-mode=3 to improve perceptual quality
- based on a differential contrast model for still images.
- * Added a new mode –deltaq-mode=4 to improve perceptual quality
- based on user rated cq_level data set for still images.
- * Weighting of some intra mode and partition size choices to better
- manage and retain texture.
- - Speedup and Memory Optimizations
- * Further improved 2-pass good quality encoder speed:
- o Speed 2 speedup: 18%
- o Speed 3 speedup: 22%
- o Speed 4 speedup: 37%
- o Speed 5 speedup: 30%
- o Speed 6 speedup: 20%
- * Optimized the real time encoder (measured on the video conference
- set):
- o RT speed 5 speedup: 110%
- o RT speed 6 speedup: 77%
- - Bug Fixes
- * Issue 3069: Fix one-pass mode keyframe placement off-by-one error.
- * Issue 3156: Fix a bug in av1_quantize_lp AVX2 optimization.
- 2021-09-29 v3.1.3
- This release includes several bug fixes.
- - Bug fixes:
- The following four cmake changes should help the people building
- libaom using MSVC.
- 1. exports: use CMAKE_SHARED_LIBRARY_PREFIX to determine lib name
- https://aomedia-review.googlesource.com/c/aom/+/142342
- 2. aom_install: Install lib dlls to bindir
- https://aomedia-review.googlesource.com/c/aom/+/146546
- 3. aom_install: use relpath for install
- https://aomedia-review.googlesource.com/c/aom/+/146550
- 4. aom_install: don't exclude msvc from install
- https://aomedia-review.googlesource.com/c/aom/+/146547
- aom/aom_encoder.h: remove configure option reference
- https://aomedia-review.googlesource.com/c/aom/+/146743
- Issue 3113: Tests for detecting chroma subsampling in
- av1_copy_and_extend_frame() do not work when y_width or y_height is
- 1
- Issue 3115: image2yuvconfig() should calculate uv_crop_width and
- uv_crop_height from y_crop_width and y_crop_height
- Issue 3140: rc_overshoot_pct is documented as having a range of
- 0-1000, but is range checked against 0-100
- Issue 3147: Build failure on Apple M1 arm64
- 2021-07-20 v3.1.2
- This release includes several bug fixes.
- - Bug fixes:
- exports.cmake: use APPLE and WIN32 and use def for mingw-w64
- https://aomedia-review.googlesource.com/c/aom/+/139882
- Issue 2993: Incorrect spatial_id when decoding base layer of
- multi-layer stream
- Issue 3080: Chroma Resampling by Encoder on Y4M Inputs Files Tagged
- as C420mpeg2
- Issue 3081: Use of uninitialized value $version_extra in
- concatenation (.) or string at aom/build/cmake/version.pl line 88.
- 2021-06-08 v3.1.1
- This release includes several bug fixes.
- - Bug fixes:
- Issue 2965: Cherry-picked the following four commits for the
- tune=butteraugli mode.
- 1. Add libjxl to pkg_config if enabled:
- https://aomedia-review.googlesource.com/c/aom/+/136044
- 2. Declare set_mb_butteraugli_rdmult_scaling static:
- https://aomedia-review.googlesource.com/c/aom/+/134506
- 3. Add color range detection in tune=butteraugli mode:
- https://aomedia-review.googlesource.com/c/aom/+/135521
- 4. Enable tune=butteraugli in all-intra mode:
- https://aomedia-review.googlesource.com/c/aom/+/136082
- Issue 3021: Fix vmaf model initialization error when not set to
- tune=vmaf
- Issue 3050: Compilation fails with -DCONFIG_TUNE_VMAF=1
- Issue 3054: Consistent crash on near-static screen content, keyframe
- related
- 2021-05-03 v3.1.0
- This release adds an "all intra" mode to the encoder, which significantly
- speeds up the encoding of AVIF still images at speed 6.
- - Upgrading:
- All intra mode for encoding AVIF still images and AV1 all intra videos:
- AOM_USAGE_ALL_INTRA (2) can be passed as the 'usage' argument to
- aom_codec_enc_config_default().
- New encoder control IDs added:
- - AV1E_SET_ENABLE_DIAGONAL_INTRA: Enable diagonal (D45 to D203) intra
- prediction modes (0: false, 1: true (default)). Also available as
- "enable-diagonal-intra" for the aom_codec_set_option() function.
- New aom_tune_metric enum value: AOM_TUNE_BUTTERAUGLI. The new aomenc option
- --tune=butteraugli was added to optimize the encoder’s perceptual quality by
- optimizing the Butteraugli metric. Install libjxl (JPEG XL) and then pass
- -DCONFIG_TUNE_BUTTERAUGLI=1 to the cmake command to enable it.
- Addition of support for libvmaf 2.x.
- - Enhancements:
- Heap memory consumption for encoding AVIF still images is significantly
- reduced.
- - Bug fixes:
- Issue 2601: third_party/libaom fails licensecheck
- Issue 2950: Conditional expression for rc->this_key_frame_forced is always
- true in find_next_key_frame()
- Issue 2988: "make install" installs the aom.h header twice
- Issue 2992: Incorrectly printing the temporal_id twice in dump_obu tool
- Issue 2998:
- Issue 2999:
- Issue 3000:
- 2021-02-24 v3.0.0
- This release includes compression efficiency improvement, speed improvement
- for realtime mode, as well as some new APIs.
- - Upgrading:
- Support for PSNR calculation based on stream bit-depth.
- New encoder control IDs added:
- - AV1E_SET_ENABLE_RECT_TX
- - AV1E_SET_VBR_CORPUS_COMPLEXITY_LAP
- - AV1E_GET_BASELINE_GF_INTERVAL
- - AV1E_SET_ENABLE_DNL_DENOISING
- New decoder control IDs added:
- - AOMD_GET_FWD_KF_PRESENT
- - AOMD_GET_FRAME_FLAGS
- - AOMD_GET_ALTREF_PRESENT
- - AOMD_GET_TILE_INFO
- - AOMD_GET_SCREEN_CONTENT_TOOLS_INFO
- - AOMD_GET_STILL_PICTURE
- - AOMD_GET_SB_SIZE
- - AOMD_GET_SHOW_EXISTING_FRAME_FLAG
- - AOMD_GET_S_FRAME_INFO
- New aom_tune_content enum value: AOM_CONTENT_FILM
- New aom_tune_metric enum value: AOM_TUNE_VMAF_NEG_MAX_GAIN
- Coefficient and mode update can be turned off via
- AV1E_SET_{COEFF/MODE}_COST_UPD_FREQ.
- New key & value API added, available with aom_codec_set_option() function.
- Scaling API expanded to include 1/4, 3/4 and 1/8.
- - Enhancements:
- Better multithreading performance with realtime mode.
- New speed 9 setting for faster realtime encoding.
- Smaller binary size with low bitdepth and realtime only build.
- Temporal denoiser and its optimizations on x86 and Neon.
- Optimizations for scaling.
- Faster encoding with speed settings 2 to 6 for good encoding mode.
- Improved documentation throughout the library, with function level
- documentation, tree view and support for the dot tool.
- - Bug fixes:
- Aside from those mentioned in v2.0.1 and v2.0.2, this release includes the
- following bug fixes:
- Issue 2940: Segfault when encoding with --use-16bit-internal and --limit > 1
- Issue 2941: Decoder mismatch with --rt --bit-depth=10 and --cpu-used=8
- Issue 2895: mingw-w64 i686 gcc fails to build
- Issue 2874: Separate ssse3 functions from sse2 file.
- 2021-02-09 v2.0.2
- This release includes several bug fixes.
- - Bug fixes:
- Issue 2643: Modify the assertion in temporal filter intrinsics.
- Issue 2648: Fix unit test ThreadTestLarge.EncoderResultTest/49
- assertion failure.
- Issue 2869: Add -Wimplicit-function-declaration as C flag only.
- Issue 2878: Avoid memset in the av1_filter_intra_predictor module
- functions.
- Issue 2903: Fix a typo bug in apply_temporal_filter_planewise.
- Call av1_setup_frame_size() when dropping a frame in the
- encode_frame_to_data_rate() function in av1/encoder/encoder.c.
- 2020-11-25 v2.0.1
- This release includes two bug fixes.
- - Bug fixes:
- Issue 2723: Fix crash in chroma_check() when generating a monochrome
- encoded stream in real-time mode.
- Issue 2833: Fix crash on some input when reduced still picture header is
- used in real-time mode and speed >=7.
- 2020-05-07 v2.0.0 "Applejack"
- First official release of libaom.
- This release includes new real-time mode and SVC support.
- - Upgrading:
- AOM_SET_POSTPROC, AOM_CODEC_CAP_POSTPROC and AOM_CODEC_USE_POSTPROC are
- removed.
- AOM_SET_DBG_* is removed.
- Multi-resolution encoding is removed.
- put_frame and put_slice callbacks are removed.
- - Enhancements:
- Full-sweep document update for codec controls.
- 2018-06-28 v1.0.0
- AOMedia Codec Workgroup Approved version 1.0
- 2016-04-07 v0.1.0 "AOMedia Codec 1"
- This release is the first Alliance for Open Media codec.
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