2 This release includes new codec interfaces, compression efficiency and
3 perceptual improvements, speedup for RTC for both video and screen content,
4 and many bug fixes. This release is ABI compatible with the previous release.
8 * AV1E_SET_SVC_FRAME_DROP_MODE is added to configure the SVC encoder to
9 only drop spatial layers or the whole superframe.
10 * Active Map is fixed and tested for RTC.
11 * CONFIG_QUANT_MATRIX is added to disable quantization matrices when aom
12 decoder is disabled with CONFIG_AV1_DECODER. Reduces ~10% binary size when
14 * libwebm is updated to libwebm-1.0.0.31-1-gaffd7f4.
16 - Compression Efficiency Improvements
17 * RTC encoding improvements
18 * 1-2% BD-rate gain for screen content with temporal layers; 5% BD-rate
19 gain on scrolling content.
21 - Perceptual Quality Improvements
22 * For RTC screen content
23 * Reduced color artifacts for RTC screen content
24 * Visual quality improved for scene changes for SVC with quality layers.
25 * Removed visual artifacts for speed 11
28 * RTC Speed 11: aggressive speedup setting added for video mode,
29 resolutions <= VGA: ~30% faster than speed 10.
30 * 5-9% speed up for high bit-depth encoding with good mode on Arm, half of
31 which comes from SVE/SVE2 optimizations.
34 * Further improvements to global motion estimation.
35 * Documented minimum required SIMD support: SSE4.1 on x86, Neon on Arm.
36 * Remove unneeded SIMD functions, saving >100 KiB from binary size.
37 * Cleaned up and improved pattern_search.
38 * Added end-to-end c vs SIMD bit-exactness test.
39 * Added config flag to calc psnr using libvmaf peak: use a slightly
40 different peak value for PSNR (1020 and 2040 for 10- and 12-bit)
44 * b/329485898 Null-dereference WRITE in av1_cdef_frame_mt
45 * b/329810149 Null-dereference WRITE in av1_cdef_copy_sb8_16
46 * b/329813868 Ill in av1_cdef_frame_mt
47 * chromium:327882824 Null-dereference WRITE in av1_cdef_init_fb_row
48 * b/330014723 Null-dereference WRITE in
49 cdef_copy_rect8_16bit_to_16bit_avx2
50 * b/310455204 Null-dereference WRITE in prepare_enc_workers
51 * b/314858909 Heap-buffer-overflow in aom_variance64x64_avx2
52 * oss-fuzz:67132 av1_dec_fuzzer: ASSERT: (pbi->tile_count_minus_1 + 1) <=
53 (pbi->output_frame_width_in_tiles_minus_1 + 1)
54 * oss-fuzz:67058 av1_dec_fuzzer: ASSERT: i == 0 || tile_w == *w
55 * oss-fuzz:67161 av1_dec_fuzzer: ASSERT: i == 0 || tile_h == *h
56 * oss-fuzz:67059 av1_dec_fuzzer: Crash in mem_get_varsize
57 * oss-fuzz:67162 av1_dec_fuzzer: Use-of-uninitialized-value in
59 * oss-fuzz:67184 av1_dec_fuzzer: Heap-buffer-overflow in od_ec_dec_init
60 * oss-fuzz:67216 av1_dec_fuzzer: Heap-buffer-overflow in
62 * oss-fuzz:67055 av1_dec_fuzzer: Heap-buffer-overflow in
65 * aomedia:3510 Large value of duration could cause encoder overflow
66 * chromium:328105513 Fix build conflicts between Abseil and libaom/libvpx
68 * aomedia:3544 AV1/SharpnessTestLarge.SharpnessPSNRTest failures after
70 * aomedia:3531 Exception encountered with PSNR calculation
71 * aomedia:3541 Can not compile correctly by CYGWIN
72 * chromium:41482688 heap-buffer-overflow write in vpx_img_read()
73 (tools_common.c) with VPX_IMG_FMT_NV12
74 * aomedia:3521 Assertion failures on Arm in CNNTest.* in
75 av1_cnn_convolve_no_maxpool_padding_valid_2x2_neon and
76 av1_cnn_convolve_no_maxpool_padding_valid_5x5_neon
77 * aomedia:3486 C vs NEON mismatch in AV1 encoder
78 * aomedia:3536 Over write in highbd_dr_prediction_z3_upsample1_neon()
79 * aomedia:3276 Significant progress on ensuring all allocations are
81 * aomedia:3491 heap-buffer-overflow encoding frames of size 256x256,
82 512x512 in good quality usage mode using 4 threads
83 * aomedia:3322 PSNR number discrepancy
84 * aomedia:3493 Cmake generates garbage symbols for libaom_srcs.gni
85 * aomedia:3478 GCC 12.2.0 emits a -Wstringop-overflow warning on
86 aom/av1/encoder/motion_search_facade.c
87 * aomedia:3484 C vs NEON mismatch in AV1 encoder for high-bitdepth case
90 This release includes several bug fixes. This release is ABI
91 compatible with the last release. See
92 https://aomedia.googlesource.com/aom/+log/v3.8.1..v3.8.2 for all the
93 commits in this release.
96 * aomedia:3523: SIGFPE in av1_twopass_postencode_update()
97 pass2_strategy.c:4261.
98 * aomedia:3535, b/317646516: Over reads in aom_convolve_copy_neon().
99 * aomedia:3543: invalid feature modifier when compiling
100 aom_dsp/arm/aom_convolve8_neon_i8mm.c on Debian 10 with arm64
102 * aomedia:3545: Failed to parse configurations due to inconsistent
103 elements between two arrays "av1_ctrl_args" and "av1_arg_ctrl_map"
105 * oss-fuzz:66474, b/319140742: Integer-overflow in search_wiener.
106 * Zero initialize an array in cdef search.
109 This release includes several bug fixes. This release is ABI
110 compatible with the last release. See
111 https://aomedia.googlesource.com/aom/+log/v3.8.0..v3.8.1 for all the
112 commits in this release.
115 * aomedia:3520: get_cubic_kernel_dbl: Assertion `0 <= x && x < 1'
117 * aomedia:3526: alloc_compressor_data() is called during every
118 aom_codec_control() call on the encoder.
119 * aomedia:3527: aom/av1/encoder/mcomp.c:1810: av1_full_pixel_search:
120 Assertion `ms_params->ms_buffers.ref->width ==
121 ms_params->ms_buffers.src->width' failed.
122 * aomedia:3534: libaom encoder crashed by AOM_USAGE_ALL_INTRA and
123 AOM_EFLAG_NO_REF_LAST flags.
124 * b/310455204: Recreate workers if necessary.
125 * b/310548198: Update frame size in actual encoding.
126 * b/314858909: Do not use adaptive error estimate.
127 * Fix a hang of cmake on arm64 macOS with cmake 3.27.0 or later.
130 This release includes three bug fixes. This release is ABI compatible
131 with the last release. See
132 https://aomedia.googlesource.com/aom/+log/v3.7.1..v3.7.2 for all the
133 commits in this release.
136 * aomedia:3520: get_cubic_kernel_dbl: Assertion `0 <= x && x < 1'
138 * aomedia:3526: alloc_compressor_data() is called during every
139 aom_codec_control() call on the encoder. Note that this partially
140 reverts the fix for bug aomedia:3349.
141 * b/310457427 and b/310766628: Only use rec_sse in CBR mode.
142 * Fix a hang of cmake on arm64 macOS with cmake 3.27.0 or later.
145 This release includes new codec interfaces, compression efficiency and
146 perceptual improvements, speedup and memory optimizations and many bug
147 fixes. This release is ABI compatible with the last release.
150 * New codec controls:
151 * AV1E_SET_MAX_CONSEC_FRAME_DROP_CBR: Set the maximum number of
152 consecutive frame drops allowed for the frame dropper in 1 pass
154 * Run-time CPU feature detection for all Arm platforms:
155 CRC, DotProd, I8MM and SVE CPU feature presence is detected at run
156 time and code paths making use of these features are selected
157 dynamically. These code paths provide meaningful performance gains
158 for standard bitdepth RTC and VoD encoding: up to 10% and 20%
159 respectively, over the Armv8.0-A baseline build.
160 * RTC: Frame-dropper support added to the rate control library.
161 * RTC Rate control improvements for low bitrate and for SVC.
163 - Compression Efficiency Improvements
164 * Improved accuracy of cost estimation for loop restoration and
166 * Improved selection of loop restoration unit size - full search up
167 to (non-realtime) speed 2, retuned static selection at higher
169 * RTC Screen content mode: 3-5% bdrate gains across speeds 7 - 10.
170 * Good-quality mode: 0.2 - 0.5% bdrate gains across speeds 1 - 4.
172 - Perceptual Quality Improvements
173 * RTC Screen: Improved visual quality for scrolling.
174 * RTC: Improved color quality for both screen and video mode.
176 - Speedup and Memory Optimizations
177 * Good-quality, single-thread encoder speedups:
178 o 15% improvement for speed 5.
179 o 12% improvement for speed 6.
180 * Arm standard bitdepth VoD (--good):
181 o 8% speedup for speeds 0 and 1.
182 o 20% speedup for speed 2.
183 o 27% speedup for speed 3.
184 o 30% speedup for speed 4.
185 o 38% speedup for speeds 5 and 6.
186 * Arm high bitdepth VoD (--good):
187 o 206% speedup for speeds 0 and 1.
188 o 180% speedup for speed 2.
189 o 51% speedup for speeds 3 and 4.
190 o 68% speedup for speed 5.
191 o 72% speedup for speed 6.
192 * RTC Screen content: 2-6% speedup across speeds 7-10.
193 * RTC: 2-3% speedup for temporal layers.
194 * RTC: Speedups to reference scaling in nonrd pickmode.
195 * Good-quality mode: Simplified global motion estimation, saving
196 ~1200 lines of code and 1KB of tables while improving quality.
199 * Fixes to improve libaom stability in case of memory allocation
201 * Fixes to SIMD functions (x86 AVX2/SSE2 and ARM Neon).
202 * b/310457427, b/310766628: Bug fixes to only use rec_sse in CBR
206 This release includes several bug fixes. This release is ABI
207 compatible with the last release. See
208 https://aomedia.googlesource.com/aom/+log/v3.7.0..v3.7.1 for all the
209 commits in this release.
212 * aomedia:3349: heap overflow when increasing resolution
213 * aomedia:3478: GCC 12.2.0 emits a -Wstringop-overflow warning on
214 aom/av1/encoder/motion_search_facade.c
215 * aomedia:3489: Detect encoder and image high bit depth mismatch
216 * aomedia:3491: heap-buffer-overflow on frame size change (CVE-2023-6879)
217 * b/303023614: Segfault at encoding time for high bit depth images
220 This release includes new codec interfaces, compression efficiency and
221 perceptual improvements, speedup and memory optimizations and many bug fixes.
222 This release is ABI compatible with the last release.
225 * New codec controls:
226 * AV1E_SET_QUANTIZER_ONE_PASS: Set quantizer for each frame.
227 * AV1E_ENABLE_RATE_GUIDE_DELTAQ: enable the rate distribution guided delta
228 quantization in all intra mode. The "enable-rate-guide-deltaq" option is
229 added for this control.
230 * AV1E_SET_RATE_DISTRIBUTION_INFO: set the input file for rate
231 distribution used in all intra mode. The "rate-distribution-info" option
232 is added for this control.
233 * AV1E_GET_LUMA_CDEF_STRENGTH
234 * AV1E_SET_BITRATE_ONE_PASS_CBR
235 * AOM_SCALING_MODE is extended to include 2/3 and 1/3 scaling.
236 * aom_tune_metric is extended to include AOM_TUNE_VMAF_SALIENCY_MAP.
237 The "tune" option is extended to include "vmaf_saliency_map".
238 * SVC example encoder svc_encoder_rtc is able to use the rate control
240 * Loopfilter level and CDEF filter level is supported by RTC rate control
242 * New speed (--cpu-used) 11, intended for RTC screen sharing, added for
243 faster encoding with ~3% bdrate loss with 16% IC (instruction count)
244 speedup compared to speed 10.
246 - Compression Efficiency Improvements
247 * Improved VoD encoding performance
248 * 0.1-0.6% BDrate gains for encoding speeds 2 to 6
249 * Rate control accuracy improvement in VBR mode
250 * RTC encoding improvements
251 * Screen content mode: 10-19% BDrate gains for speeds 6 - 10
252 * Temporal layers video mode, for speed 10:
253 * 2 temporal layers on low resolutions: 13-15% BDrate gain
254 * 3 temporal layers on VGA/HD: 3-4% BDrate gain
256 - Perceptual Quality Improvements
257 * Fixed multiple block and color artifacts for RTC screen content by
258 * Incorporating color into RD cost for IDTX
259 * Reducing thresholds for palette mode in non RD mode
260 * Allowing more palette mode testing
261 * Improved color sensitivity for altref in non-RD mode.
262 * Reduced video flickering for temporal layer encoding.
264 - Speedup and Memory Optimizations
265 * Speed up the VoD encoder
266 * 2-5% for encoding speed 2 to 4
267 * 9-15% for encoding speed 5 to 6
277 * Screen content mode
278 * 15% IC speedup for speeds 6-8
279 * ARM: 7% for speed 9, 3% for speed 10
280 * Temporal layers video mode
281 * 7% speedup for 3 temporal layers on VGA/HD, for speed 10
283 * x86: 2% IC speedup for speeds 7-10
284 * ARM: 2-4% speedup across speeds 5-10
287 * VoD: Major improvements to global motion estimation, now enabled up to
290 * Fixes to make lossless coding work.
291 * Fixes to make frame dropper (--drop_frames) work for single and temporal
293 * Improvements to RPS (reference picture selection) recovery frames.
294 * Improvements to rate control for temporal layers.
295 * libwebm is updated to libwebm-1.0.0.29-9-g1930e3c
298 * aomedia:3261 Assertion failed when encoding av1 with film grain and
300 * aomedia:3276 ensure all allocations are checked (partial fix)
301 * aomedia:3451 The libaom library calls exit()
302 * aomedia:3450 enable -Wshadow for C++ sources
303 * aomedia:3449 Test Seg Faults After
304 b459af3e345be402db052a143fcc5383d4b74cbd
305 * aomedia:3416 prune unused symbols / restrict symbol visibility
306 * aomedia:3443 Jenkins failure:
307 UninstantiatedParameterizedTestSuite<EstimateNoiseTest>
308 * aomedia:3434 realtime failures with CONFIG_BITSTREAM_DEBUG=1
309 * aomedia:3433 DeltaqModeTest crash w/row_mt=0
310 * aomedia:3429 Encoder crash when turn on both ExternalResize and
312 * aomedia:3438 Build failure with
313 `-DSANITIZE=address -DBUILD_SHARED_LIBS=ON` when using clang.
314 * aomedia:3435 Block artifacts when scrolling with AV1 in screen sharing
316 * aomedia:3170 vmaf tune presets produce extreme glitches in one scene
317 * aomedia:3401 Building shared libaom with MSVC results in a race condition
318 with the export library
319 * aomedia:3420 Floating point exception in av1_tpl_get_frame_importance()
320 * aomedia:3424 heap-buffer-overflow in ScaleFilterCols_16_C() (SIGABRT)
321 * aomedia:3417 examples/svc_encoder_rtc.c is using internal macros and
323 * aomedia:3372 SEGV in assign_frame_buffer_p av1_common_int.h
324 * aomedia:3130 'cpu-features.h' file not found on Android NDK 22
325 * aomedia:3415 Encoder/decoder mismatch for svc_encoder_rtc running
327 * aomedia:3412 Lossless Mode Fails Loopback Bit Test
328 * aomedia:3409 The use of AV1_VAR_OFFS in av1/encoder/var_based_part.c is
329 incorrect for high bit depths
330 * aomedia:3403 test_libaom fails with error message
331 "feenableexcept() failed" on Linux arm
332 * aomedia:3370 Random color block at fast motion area
333 * aomedia:3393 Assertion failure in av1_convolve_2d_sr_c()
334 * aomedia:3392 Strong artifacting for high bit-depth real-time
335 * aomedia:3376 aomenc --threads=10 --deltaq-mode=3 crashes after
336 "Allintra: multi-threading of calculating differential contrast"
337 * aomedia:3380 Crashes and ASan and TSan errors in deltaq-mode=3
339 * chromium:1410766 heap-buffer-overflow in aom_yv12_copy_v_c
340 * Cannot set level via AV1E_SET_TARGET_SEQ_LEVEL_IDX
341 * Encoding failure due to the use of loop restoration with unintended use of
343 * Signed integer overflow in scan_past_frames
344 * Signed integer overflow in update_a_sep_sym
345 * Flickering in AV1 1440p/2160p HDR transcodes
346 * Fixed artifacts with screen share at encoder speed 10
347 * Fixed prediction setup for IDTX
350 This release includes several bug fixes. This release is ABI
351 compatible with the last release. See
352 https://aomedia.googlesource.com/aom/+log/v3.6.0..v3.6.1 for all the
353 commits in this release.
356 * aomedia:2871: Guard the support of the 7.x and 8.x levels for AV1
357 under the CONFIG_CWG_C013 config flag, and only output the 7.x and
358 8.x levels when explicitly requested.
359 * aomedia:3382: Choose sb_size by ppi instead of svc.
360 * aomedia:3384: Fix fullpel search limits.
361 * aomedia:3388: Replace left shift of xq_active by multiplication.
362 * aomedia:3389: Fix MV clamping in av1_mv_pred.
363 * aomedia:3390: set_ld_layer_depth: cap max_layer_depth to
365 * aomedia:3418: Fix MV clamping in av1_int_pro_motion_estimation.
366 * aomedia:3429: Move lpf thread data init to lpf_pipeline_mt_init().
367 * b:266719111: Fix undefined behavior in Arm Neon code.
368 * b:269840681: nonrd_opt: align scan tables.
369 * rtc: Fix is_key_frame setting in variance partition.
370 * Build: Fix build with clang-cl and Visual Studio.
371 * Build: Fix module definition file for MinGW/MSYS.
374 This release includes compression efficiency and perceptual quality
375 improvements, speedup and memory optimizations, and some new features.
376 This release is ABI compatible with the last release.
379 * New values 20-27 (corresponding to levels 7.0-7.3 and 8.0-8.3) for
380 the encoder control AV1E_SET_TARGET_SEQ_LEVEL_IDX (note that the
381 proposal to add the new levels are still in draft status). The
382 original special value 24 (keep level stats only for level
383 monitoring) is renumbered as 32.
384 * New encoder control AV1E_SET_SKIP_POSTPROC_FILTERING to skip the
385 application of post-processing filters on reconstructed frame in
387 * New encoder option "kf-max-pyr-height": Maximum height of pyramid
388 structure used for the GOP starting with a key frame (-1 to 5).
389 * Make SVC work for screen content.
390 * Rate control improvements to reduce frame-size spikes for screen
392 * RISC-V architecture support with gcc toolchain.
394 - Compression Efficiency Improvements
395 * Peak compression efficiency in VOD setting is improved by 1%.
396 * 0.7% - 2.2% RTC encoding BDrate gains for real time speed 8 to 10.
397 * 15% RTC encoding BDrate gains for screen content speed 10.
399 - Perceptual Quality Improvements
400 * Resolved a visual quality issue that was reported for high
401 resolution clips (2K) for speed 4 and above in VOD use case.
402 * Visual quality improvements to screen content coding.
403 * Quality improvements to temporal layer RTC coding.
405 - Speedup and Memory Optimizations
406 * RTC single-thread encoder speedup:
407 o ~6% instruction count reduction for speed 5 and 6.
408 o ~15% instruction count reduction for speed 7.
409 o ~10% instruction count reduction for speed 8 to 10 (>=360p
411 * RTC multi-thread encoder speedup (beyond single-thread speedup):
412 o 5-8% encode time reduction for speed 7 to 10.
413 * RTC screen-content encoder speedup:
414 o 11% instruction count reduction for speed 9 and 10 (>=720p
416 * ~5% reduction in heap memory requirements for RTC, speed 6 to 10.
418 o 4-5% speedup for speed 9 in still-picture encoding mode.
419 o 3-4% heap memory reduction in still-picture encoding mode for
420 360p-720p resolutions with multiple threads.
423 * Added a workaround for an AV1 specification bug which makes
424 TRANSLATION type global motion models unusable.
425 * Fixed AddressSanitizer global-buffer-overflow errors in
426 av1/encoder/arm/neon/av1_fwd_txfm2d_neon.c.
427 * Fixed AddressSanitizer heap-buffer-overflow error in
428 av1_wiener_convolve_add_src_neon().
429 * chromium:1393384 Avoid scene detection on spatial resize.
430 * aomedia:3308 Remove color artifacts under high motion.
431 * aomedia:3310 Avoid out of memory failures with Visual Studio 2017,
432 2019, and 2022 for Win32 x86 builds.
433 * aomedia:3346 Make SVC work properly for screen content.
434 * aomedia:3348 Fix a bug where an uninitialized search_site is used.
435 * aomedia:3365 Work around what seems like a Visual Studio 2022
436 compiler optimization bug.
437 * aomedia:3369 Incorrect PSNR values reported by libaom for 12-bit
441 This release is ABI compatible with the last one, including speedup and memory
442 optimizations, and new APIs and features.
445 * Support for frame parallel encode for larger number of threads. --fp-mt
446 flag is available for all build configurations.
447 * New codec control AV1E_GET_NUM_OPERATING_POINTS
449 - Speedup and Memory Optimizations
450 * Speed-up multithreaded encoding for good quality mode for larger number of
451 threads through frame parallel encoding:
452 o 30-34% encode time reduction for 1080p, 16 threads, 1x1 tile
453 configuration (tile_rows x tile_columns)
454 o 18-28% encode time reduction for 1080p, 16 threads, 2x4 tile
456 o 18-20% encode time reduction for 2160p, 32 threads, 2x4 tile
458 * 16-20% speed-up for speed=6 to 8 in still-picture encoding mode
459 * 5-6% heap memory reduction for speed=6 to 10 in real-time encoding mode
460 * Improvements to the speed for speed=7, 8 in real-time encoding mode
461 * Improvements to the speed for speed=9, 10 in real-time screen encoding
463 * Optimizations to improve multi-thread efficiency in real-time encoding
465 * 10-15% speed up for SVC with temporal layers
466 * SIMD optimizations:
467 o Improve av1_quantize_fp_32x32_neon() 1.05x to 1.24x faster
468 o Add aom_highbd_quantize_b{,_32x32,_64x64}_adaptive_neon() 3.15x to 5.6x
470 o Improve av1_quantize_fp_64x64_neon() 1.17x to 1.66x faster
471 o Add aom_quantize_b_avx2() 1.4x to 1.7x faster than aom_quantize_b_avx()
472 o Add aom_quantize_b_32x32_avx2() 1.4x to 2.3x faster than
473 aom_quantize_b_32x32_avx()
474 o Add aom_quantize_b_64x64_avx2() 2.0x to 2.4x faster than
475 aom_quantize_b_64x64_ssse3()
476 o Add aom_highbd_quantize_b_32x32_avx2() 9.0x to 10.5x faster than
477 aom_highbd_quantize_b_32x32_c()
478 o Add aom_highbd_quantize_b_64x64_avx2() 7.3x to 9.7x faster than
479 aom_highbd_quantize_b_64x64_c()
480 o Improve aom_highbd_quantize_b_avx2() 1.07x to 1.20x faster
481 o Improve av1_quantize_fp_avx2() 1.13x to 1.49x faster
482 o Improve av1_quantize_fp_32x32_avx2() 1.07x to 1.54x faster
483 o Improve av1_quantize_fp_64x64_avx2() 1.03x to 1.25x faster
484 o Improve av1_quantize_lp_avx2() 1.07x to 1.16x faster
486 - Bug fixes including but not limited to
487 * aomedia:3206 Assert that skip_width > 0 for deconvolve function
488 * aomedia:3278 row_mt enc: Delay top-right sync when intraBC is enabled
489 * aomedia:3282 blend_a64_*_neon: fix bus error in armv7
490 * aomedia:3283 FRAME_PARALLEL: Propagate border size to all cpis
491 * aomedia:3283 RESIZE_MODE: Fix incorrect strides being used for motion
493 * aomedia:3286 rtc-svc: Fix to dynamic_enable spatial layers
494 * aomedia:3289 rtc-screen: Fix to skipping inter-mode test in nonrd
495 * aomedia:3289 rtc-screen: Fix for skip newmv on flat blocks
496 * aomedia:3299 Fix build failure with CONFIG_TUNE_VMAF=1
497 * aomedia:3296 Fix the conflict --enable-tx-size-search=0 with nonrd mode
498 --enable-tx-size-search will be ignored in non-rd pick mode
499 * aomedia:3304 Fix off-by-one error of max w/h in validate_config
500 * aomedia:3306 Do not use pthread_setname_np on GNU/Hurd
501 * aomedia:3325 row-multithreading produces invalid bitstream in some cases
502 * chromium:1346938, chromium:1338114
503 * compiler_flags.cmake: fix flag detection w/cmake 3.17-3.18.2
504 * tools/*.py: update to python3
505 * aom_configure.cmake: detect PIE and set CONFIG_PIC
506 * test/simd_cmp_impl: use explicit types w/CompareSimd*
507 * rtc: Fix to disable segm for aq-mode=3
508 * rtc: Fix to color_sensitivity in variance partition
509 * rtc-screen: Fix bsize in model rd computation for intra chroma
510 * Fixes to ensure the correct behavior of the encoder algorithms (like
511 segmentation, computation of statistics, etc.)
514 This release includes compression efficiency and perceptual quality
515 improvements, speedup and memory optimizations, and some new features.
516 There are no ABI or API breaking changes in this release.
519 * New --dist-metric flag with "qm-psnr" value to use quantization
520 matrices in the distortion computation for RD search. The default
522 * New command line option "--auto-intra-tools-off=1" to make
523 all-intra encoding faster for high bit rate under
524 "--deltaq-mode=3" mode.
525 * New rate control library aom_av1_rc for real-time hardware
526 encoders. Supports CBR for both one spatial layer and SVC.
527 * New image format AOM_IMG_FMT_NV12 can be used as input to the
528 encoder. The presence of AOM_IMG_FMT_NV12 can be detected at
529 compile time by checking if the macro AOM_HAVE_IMG_FMT_NV12 is
531 * New codec controls for the encoder:
532 o AV1E_SET_AUTO_INTRA_TOOLS_OFF. Only in effect if
534 o AV1E_SET_RTC_EXTERNAL_RC
535 o AV1E_SET_FP_MT. Only supported if libaom is built with
536 -DCONFIG_FRAME_PARALLEL_ENCODE=1.
537 o AV1E_GET_TARGET_SEQ_LEVEL_IDX
538 * New key-value pairs for the key-value API:
539 o --auto-intra-tools-off=0 (default) or 1. Only in effect if
541 o --strict-level-conformance=0 (default) or 1
542 o --fp-mt=0 (default) or 1. Only supported if libaom is built
543 with -DCONFIG_FRAME_PARALLEL_ENCODE=1.
544 * New aomenc options (not supported by the key-value API):
547 - Compression Efficiency Improvements
548 * Correctly calculate SSE for high bitdepth in skip mode, 0.2% to
550 * RTC at speed 9/10: BD-rate gain of ~4/5%
551 * RTC screen content coding: many improvements for real-time screen
552 at speed 10 (quality, speedup, and rate control), up to high
554 * RTC-SVC: fixes to make intra-only frames work for spatial layers.
555 * RTC-SVC: quality improvements for temporal layers.
556 * AV1 RT: A new passive rate control strategy for screen content, an
557 average of 7.5% coding gain, with some clips of 20+%. The feature
558 is turned off by default due to higher bit rate variation.
560 - Perceptual Quality Improvements
561 * RTC: Visual quality improvements for high speeds (9/10)
562 * Improvements in coding quality for all intra mode
564 - Speedup and Memory Optimizations
565 * ~10% speedup in good quality mode encoding.
566 * ~7% heap memory reduction in good quality encoding mode for speed
568 * Ongoing improvements to intra-frame encoding performance on Arm
569 * Faster encoding speed for "--deltaq-mode=3" mode.
570 * ~10% speedup for speed 5/6, ~15% speedup for speed 7/8, and
571 ~10% speedup for speed 9/10 in real time encoding mode
572 * ~20% heap memory reduction in still-picture encoding mode for
573 360p-720p resolutions with multiple threads
574 * ~13% speedup for speed 6 and ~12% speedup for speed 9 in
575 still-picture encoding mode.
576 * Optimizations to improve multi-thread efficiency for still-picture
580 * b/204460717: README.md: replace master with main
581 * b/210677928: libaom disable_order is surprising for
582 max_reference_frames=3
583 * b/222461449: -DCONFIG_TUNE_BUTTERAUGLI=1 broken
584 * b/227207606: write_greyscale writes incorrect chroma in highbd
586 * b/229955363: Integer-overflow in linsolve_wiener
587 * https://crbug.com/aomedia/2032
588 * https://crbug.com/aomedia/2397
589 * https://crbug.com/aomedia/2563
590 * https://crbug.com/aomedia/2815
591 * https://crbug.com/aomedia/3009
592 * https://crbug.com/aomedia/3018
593 * https://crbug.com/aomedia/3045
594 * https://crbug.com/aomedia/3101
595 * https://crbug.com/aomedia/3130
596 * https://crbug.com/aomedia/3173
597 * https://crbug.com/aomedia/3184
598 * https://crbug.com/aomedia/3187
599 * https://crbug.com/aomedia/3190
600 * https://crbug.com/aomedia/3195
601 * https://crbug.com/aomedia/3197
602 * https://crbug.com/aomedia/3201
603 * https://crbug.com/aomedia/3202
604 * https://crbug.com/aomedia/3204
605 * https://crbug.com/aomedia/3205
606 * https://crbug.com/aomedia/3207
607 * https://crbug.com/aomedia/3208
608 * https://crbug.com/aomedia/3209
609 * https://crbug.com/aomedia/3213
610 * https://crbug.com/aomedia/3214
611 * https://crbug.com/aomedia/3219
612 * https://crbug.com/aomedia/3222
613 * https://crbug.com/aomedia/3223
614 * https://crbug.com/aomedia/3225
615 * https://crbug.com/aomedia/3226
616 * https://crbug.com/aomedia/3228
617 * https://crbug.com/aomedia/3232
618 * https://crbug.com/aomedia/3236
619 * https://crbug.com/aomedia/3237
620 * https://crbug.com/aomedia/3238
621 * https://crbug.com/aomedia/3240
622 * https://crbug.com/aomedia/3243
623 * https://crbug.com/aomedia/3244
624 * https://crbug.com/aomedia/3246
625 * https://crbug.com/aomedia/3248
626 * https://crbug.com/aomedia/3250
627 * https://crbug.com/aomedia/3251
628 * https://crbug.com/aomedia/3252
629 * https://crbug.com/aomedia/3255
630 * https://crbug.com/aomedia/3257
631 * https://crbug.com/aomedia/3259
632 * https://crbug.com/aomedia/3260
633 * https://crbug.com/aomedia/3267
634 * https://crbug.com/aomedia/3268
635 * https://crbug.com/aomedia/3269
636 * https://crbug.com/aomedia/3276
637 * https://crbug.com/aomedia/3278
638 * https://crbug.com/chromium/1290068
639 * https://crbug.com/chromium/1303237
640 * https://crbug.com/chromium/1304990
641 * https://crbug.com/chromium/1321141
642 * https://crbug.com/chromium/1321388
643 * https://crbug.com/oss-fuzz/44846
644 * https://crbug.com/oss-fuzz/44856
645 * https://crbug.com/oss-fuzz/44862
646 * https://crbug.com/oss-fuzz/44904
647 * https://crbug.com/oss-fuzz/45056
650 This release includes compression efficiency and perceptual quality
651 improvements, speedup and memory optimizations, some new features, and
655 * AV1 RT: Introducing CDEF search level 5
656 * Changed real time speed 4 to behave the same as real time speed 5
657 * Add --deltaq-strength
658 * rtc: Allow scene-change and overshoot detection for svc
659 * rtc: Intra-only frame for svc
660 * AV1 RT: Option 2 for codec control AV1E_SET_ENABLE_CDEF to disable
661 CDEF on non-ref frames
662 * New codec controls AV1E_SET_LOOPFILTER_CONTROL and
663 AOME_GET_LOOPFILTER_LEVEL
664 * Improvements to three pass encoding
666 - Compression Efficiency Improvements
667 * Overall compression gains: 0.6%
669 - Perceptual Quality Improvements
670 * Improves the perceptual quality of high QP encoding for delta-q mode 4
671 * Auto select noise synthesis level for all intra
673 - Speedup and Memory Optimizations
674 * Added many SSE2 optimizations.
675 * Good quality 2-pass encoder speedups:
681 * Real time mode encoder speedups:
682 o Speed 5: 2.6% BDRate gain, 4% speedup
683 o Speed 6: 3.5% BDRate gain, 4% speedup
684 o Speed 9: 1% BDRate gain, 3% speedup
685 o Speed 10: 3% BDRate gain, neutral speedup
686 * All intra encoding speedups (AVIF):
687 o Single thread - speed 6: 8%
688 o Single thread - speed 9: 15%
689 o Multi thread(8) - speed 6: 14%
690 o Multi thread(8) - speed 9: 34%
693 * Issue 3163: Segmentation fault when using --enable-keyframe-filtering=2
694 * Issue 2436: Integer overflow in av1_warp_affine_c()
695 * Issue 3226: armv7 build failure due to gcc-11
696 * Issue 3195: Bug report on libaom (AddressSanitizer: heap-buffer-overflow)
697 * Issue 3191: Bug report on libaom (AddressSanitizer: SEGV on unknown
699 * Issue 3176: Some SSE2/SADx4AvgTest.* tests fail on Windows
700 * Issue 3175: Some SSE2/SADSkipTest.* tests fail on Windows
703 This release includes compression efficiency and perceptual quality
704 improvements, speedup and memory optimizations, as well as some new
708 * Introduced speeds 7, 8, and 9 for all intra mode.
709 * Introduced speed 10 for real time mode.
710 * Introduced an API that allows external partition decisions.
711 * SVC: added support for compound prediction.
712 * SVC: added support for fixed SVC modes.
714 - Compression Efficiency Improvements
715 * Intra-mode search improvement.
716 * Improved real time (RT) mode BDrate savings by ~5% (RT speed 5)
717 and ~12% (RT speed 6). The improvement was measured on the video
719 * Improved real time mode for nonrd path (speed 7, 8, 9): BDrate
721 * Rate control and RD adjustments based on ML research in VP9.
722 Gains of ~0.5-1.0% for HD.
724 - Perceptual Quality Improvements
725 * Added a new mode --deltaq-mode=3 to improve perceptual quality
726 based on a differential contrast model for still images.
727 * Added a new mode --deltaq-mode=4 to improve perceptual quality
728 based on user rated cq_level data set for still images.
729 * Weighting of some intra mode and partition size choices to better
730 manage and retain texture.
732 - Speedup and Memory Optimizations
733 * Further improved 2-pass good quality encoder speed:
734 o Speed 2 speedup: 18%
735 o Speed 3 speedup: 22%
736 o Speed 4 speedup: 37%
737 o Speed 5 speedup: 30%
738 o Speed 6 speedup: 20%
739 * Optimized the real time encoder (measured on the video conference
741 o RT speed 5 speedup: 110%
742 o RT speed 6 speedup: 77%
745 * Issue 3069: Fix one-pass mode keyframe placement off-by-one error.
746 * Issue 3156: Fix a bug in av1_quantize_lp AVX2 optimization.
749 This release includes several bug fixes.
752 The following four cmake changes should help the people building
754 1. exports: use CMAKE_SHARED_LIBRARY_PREFIX to determine lib name
755 https://aomedia-review.googlesource.com/c/aom/+/142342
756 2. aom_install: Install lib dlls to bindir
757 https://aomedia-review.googlesource.com/c/aom/+/146546
758 3. aom_install: use relpath for install
759 https://aomedia-review.googlesource.com/c/aom/+/146550
760 4. aom_install: don't exclude msvc from install
761 https://aomedia-review.googlesource.com/c/aom/+/146547
763 aom/aom_encoder.h: remove configure option reference
764 https://aomedia-review.googlesource.com/c/aom/+/146743
766 Issue 3113: Tests for detecting chroma subsampling in
767 av1_copy_and_extend_frame() do not work when y_width or y_height is
770 Issue 3115: image2yuvconfig() should calculate uv_crop_width and
771 uv_crop_height from y_crop_width and y_crop_height
773 Issue 3140: rc_overshoot_pct is documented as having a range of
774 0-1000, but is range checked against 0-100
776 Issue 3147: Build failure on Apple M1 arm64
779 This release includes several bug fixes.
782 exports.cmake: use APPLE and WIN32 and use def for mingw-w64
783 https://aomedia-review.googlesource.com/c/aom/+/139882
785 Issue 2993: Incorrect spatial_id when decoding base layer of
788 Issue 3080: Chroma Resampling by Encoder on Y4M Inputs Files Tagged
791 Issue 3081: Use of uninitialized value $version_extra in
792 concatenation (.) or string at aom/build/cmake/version.pl line 88.
795 This release includes several bug fixes.
798 Issue 2965: Cherry-picked the following four commits for the
799 tune=butteraugli mode.
800 1. Add libjxl to pkg_config if enabled:
801 https://aomedia-review.googlesource.com/c/aom/+/136044
802 2. Declare set_mb_butteraugli_rdmult_scaling static:
803 https://aomedia-review.googlesource.com/c/aom/+/134506
804 3. Add color range detection in tune=butteraugli mode:
805 https://aomedia-review.googlesource.com/c/aom/+/135521
806 4. Enable tune=butteraugli in all-intra mode:
807 https://aomedia-review.googlesource.com/c/aom/+/136082
809 Issue 3021: Fix vmaf model initialization error when not set to
812 Issue 3050: Compilation fails with -DCONFIG_TUNE_VMAF=1
814 Issue 3054: Consistent crash on near-static screen content, keyframe
818 This release adds an "all intra" mode to the encoder, which significantly
819 speeds up the encoding of AVIF still images at speed 6.
822 All intra mode for encoding AVIF still images and AV1 all intra videos:
823 AOM_USAGE_ALL_INTRA (2) can be passed as the 'usage' argument to
824 aom_codec_enc_config_default().
826 New encoder control IDs added:
827 - AV1E_SET_ENABLE_DIAGONAL_INTRA: Enable diagonal (D45 to D203) intra
828 prediction modes (0: false, 1: true (default)). Also available as
829 "enable-diagonal-intra" for the aom_codec_set_option() function.
831 New aom_tune_metric enum value: AOM_TUNE_BUTTERAUGLI. The new aomenc option
832 --tune=butteraugli was added to optimize the encoder's perceptual quality by
833 optimizing the Butteraugli metric. Install libjxl (JPEG XL) and then pass
834 -DCONFIG_TUNE_BUTTERAUGLI=1 to the cmake command to enable it.
836 Addition of support for libvmaf 2.x.
839 Heap memory consumption for encoding AVIF still images is significantly
843 Issue 2601: third_party/libaom fails licensecheck
845 Issue 2950: Conditional expression for rc->this_key_frame_forced is always
846 true in find_next_key_frame()
848 Issue 2988: "make install" installs the aom.h header twice
850 Issue 2992: Incorrectly printing the temporal_id twice in dump_obu tool
859 This release includes compression efficiency improvement, speed improvement
860 for realtime mode, as well as some new APIs.
863 Support for PSNR calculation based on stream bit-depth.
865 New encoder control IDs added:
866 - AV1E_SET_ENABLE_RECT_TX
867 - AV1E_SET_VBR_CORPUS_COMPLEXITY_LAP
868 - AV1E_GET_BASELINE_GF_INTERVAL
869 - AV1E_SET_ENABLE_DNL_DENOISING
871 New decoder control IDs added:
872 - AOMD_GET_FWD_KF_PRESENT
873 - AOMD_GET_FRAME_FLAGS
874 - AOMD_GET_ALTREF_PRESENT
876 - AOMD_GET_SCREEN_CONTENT_TOOLS_INFO
877 - AOMD_GET_STILL_PICTURE
879 - AOMD_GET_SHOW_EXISTING_FRAME_FLAG
880 - AOMD_GET_S_FRAME_INFO
882 New aom_tune_content enum value: AOM_CONTENT_FILM
884 New aom_tune_metric enum value: AOM_TUNE_VMAF_NEG_MAX_GAIN
886 Coefficient and mode update can be turned off via
887 AV1E_SET_{COEFF/MODE}_COST_UPD_FREQ.
889 New key & value API added, available with aom_codec_set_option() function.
891 Scaling API expanded to include 1/4, 3/4 and 1/8.
894 Better multithreading performance with realtime mode.
896 New speed 9 setting for faster realtime encoding.
898 Smaller binary size with low bitdepth and realtime only build.
900 Temporal denoiser and its optimizations on x86 and Neon.
902 Optimizations for scaling.
904 Faster encoding with speed settings 2 to 6 for good encoding mode.
906 Improved documentation throughout the library, with function level
907 documentation, tree view and support for the dot tool.
910 Aside from those mentioned in v2.0.1 and v2.0.2, this release includes the
913 Issue 2940: Segfault when encoding with --use-16bit-internal and --limit > 1
915 Issue 2941: Decoder mismatch with --rt --bit-depth=10 and --cpu-used=8
917 Issue 2895: mingw-w64 i686 gcc fails to build
919 Issue 2874: Separate ssse3 functions from sse2 file.
922 This release includes several bug fixes.
925 Issue 2643: Modify the assertion in temporal filter intrinsics.
927 Issue 2648: Fix unit test ThreadTestLarge.EncoderResultTest/49
930 Issue 2869: Add -Wimplicit-function-declaration as C flag only.
932 Issue 2878: Avoid memset in the av1_filter_intra_predictor module
935 Issue 2903: Fix a typo bug in apply_temporal_filter_planewise.
937 Call av1_setup_frame_size() when dropping a frame in the
938 encode_frame_to_data_rate() function in av1/encoder/encoder.c.
941 This release includes two bug fixes.
944 Issue 2723: Fix crash in chroma_check() when generating a monochrome
945 encoded stream in real-time mode.
947 Issue 2833: Fix crash on some input when reduced still picture header is
948 used in real-time mode and speed >=7.
950 2020-05-07 v2.0.0 "Applejack"
951 First official release of libaom.
952 This release includes new real-time mode and SVC support.
955 AOM_SET_POSTPROC, AOM_CODEC_CAP_POSTPROC and AOM_CODEC_USE_POSTPROC are
958 AOM_SET_DBG_* is removed.
960 Multi-resolution encoding is removed.
962 put_frame and put_slice callbacks are removed.
965 Full-sweep document update for codec controls.
968 AOMedia Codec Workgroup Approved version 1.0
970 2016-04-07 v0.1.0 "AOMedia Codec 1"
971 This release is the first Alliance for Open Media codec.