1 2017-01-04 v1.7.0 "Mandarin Duck" 2 This release focused on high bit depth performance (10/12 bit) and vp9 3 encoding improvements. 4 5 - Upgrading: 6 This release is ABI incompatible due to new vp9 encoder features. 7 8 Frame parallel decoding for vp9 has been removed. 9 10 - Enhancements: 11 vp9 encoding supports additional threads with --row-mt. This can be greater 12 than the number of tiles. 13 14 Two new vp9 encoder options have been added: 15 --corpus-complexity 16 --tune-content=film 17 18 Additional tooling for respecting the vp9 "level" profiles has been added. 19 20 - Bug fixes: 21 A variety of fuzzing issues. 22 vp8 threading fix for ARM. 23 Codec control VP9_SET_SKIP_LOOP_FILTER fixed. 24 Reject invalid multi resolution configurations. 25 26 2017-01-09 v1.6.1 "Long Tailed Duck" 27 This release improves upon the VP9 encoder and speeds up the encoding and 28 decoding processes. 29 30 - Upgrading: 31 This release is ABI compatible with 1.6.0. 32 33 - Enhancements: 34 Faster VP9 encoding and decoding. 35 High bit depth builds now provide similar speed for 8 bit encode and decode 36 for x86 targets. Other platforms and higher bit depth improvements are in 37 progress. 38 39 - Bug Fixes: 40 A variety of fuzzing issues. 41 42 2016-07-20 v1.6.0 "Khaki Campbell Duck" 43 This release improves upon the VP9 encoder and speeds up the encoding and 44 decoding processes. 45 46 - Upgrading: 47 This release is ABI incompatible with 1.5.0 due to a new 'color_range' enum 48 in vpx_image and some minor changes to the VP8_COMP structure. 49 50 The default key frame interval for VP9 has changed from 128 to 9999. 51 52 - Enhancement: 53 A core focus has been performance for low end Intel processors. SSSE3 54 instructions such as 'pshufb' have been avoided and instructions have been 55 reordered to better accommodate the more constrained pipelines. 56 57 As a result, devices based on Celeron processors have seen substantial 58 decoding improvements. From Indian Runner Duck to Javan Whistling Duck, 59 decoding speed improved between 10 and 30%. Between Javan Whistling Duck 60 and Khaki Campbell Duck, it improved another 10 to 15%. 61 62 While Celeron benefited most, Core-i5 also improved 5% and 10% between the 63 respective releases. 64 65 Realtime performance for WebRTC for both speed and quality has received a 66 lot of attention. 67 68 - Bug Fixes: 69 A number of fuzzing issues, found variously by Mozilla, Chromium and others, 70 have been fixed and we strongly recommend updating. 71 72 2015-11-09 v1.5.0 "Javan Whistling Duck" 73 This release improves upon the VP9 encoder and speeds up the encoding and 74 decoding processes. 75 76 - Upgrading: 77 This release is ABI incompatible with 1.4.0. It drops deprecated VP8 78 controls and adds a variety of VP9 controls for testing. 79 80 The vpxenc utility now prefers VP9 by default. 81 82 - Enhancements: 83 Faster VP9 encoding and decoding 84 Smaller library size by combining functions used by VP8 and VP9 85 86 - Bug Fixes: 87 A variety of fuzzing issues 88 89 2015-04-03 v1.4.0 "Indian Runner Duck" 90 This release includes significant improvements to the VP9 codec. 91 92 - Upgrading: 93 This release is ABI incompatible with 1.3.0. It drops the compatibility 94 layer, requiring VPX_IMG_FMT_* instead of IMG_FMT_*, and adds several codec 95 controls for VP9. 96 97 - Enhancements: 98 Faster VP9 encoding and decoding 99 Multithreaded VP9 decoding (tile and frame-based) 100 Multithreaded VP9 encoding - on by default 101 YUV 4:2:2 and 4:4:4 support in VP9 102 10 and 12bit support in VP9 103 64bit ARM support by replacing ARM assembly with intrinsics 104 105 - Bug Fixes: 106 Fixes a VP9 bitstream issue in Profile 1. This only affected non-YUV 4:2:0 107 files. 108 109 - Known Issues: 110 Frame Parallel decoding fails for segmented and non-420 files. 111 112 2013-11-15 v1.3.0 "Forest" 113 This release introduces the VP9 codec in a backward-compatible way. 114 All existing users of VP8 can continue to use the library without 115 modification. However, some VP8 options do not map to VP9 in the same manner. 116 117 The VP9 encoder in this release is not feature complete. Users interested in 118 the encoder are advised to use the git master branch and discuss issues on 119 libvpx mailing lists. 120 121 - Upgrading: 122 This release is ABI and API compatible with Duclair (v1.0.0). Users 123 of older releases should refer to the Upgrading notes in this document 124 for that release. 125 126 - Enhancements: 127 Get rid of bashisms in the main build scripts 128 Added usage info on command line options 129 Add lossless compression mode 130 Dll build of libvpx 131 Add additional Mac OS X targets: 10.7, 10.8 and 10.9 (darwin11-13) 132 Add option to disable documentation 133 configure: add --enable-external-build support 134 make: support V=1 as short form of verbose=yes 135 configure: support mingw-w64 136 configure: support hardfloat armv7 CHOSTS 137 configure: add support for android x86 138 Add estimated completion time to vpxenc 139 Don't exit on decode errors in vpxenc 140 vpxenc: support scaling prior to encoding 141 vpxdec: support scaling output 142 vpxenc: improve progress indicators with --skip 143 msvs: Don't link to winmm.lib 144 Add a new script for producing vcxproj files 145 Produce Visual Studio 10 and 11 project files 146 Produce Windows Phone project files 147 msvs-build: use msbuild for vs >= 2005 148 configure: default configure log to config.log 149 Add encoding option --static-thresh 150 151 - Speed: 152 Miscellaneous speed optimizations for VP8 and VP9. 153 154 - Quality: 155 In general, quality is consistent with the Eider release. 156 157 - Bug Fixes: 158 This release represents approximately a year of engineering effort, 159 and contains multiple bug fixes. Please refer to git history for details. 160 161 162 2012-12-21 v1.2.0 163 This release acts as a checkpoint for a large amount of internal refactoring 164 and testing. It also contains a number of small bugfixes, so all users are 165 encouraged to upgrade. 166 167 - Upgrading: 168 This release is ABI and API compatible with Duclair (v1.0.0). Users 169 of older releases should refer to the Upgrading notes in this 170 document for that release. 171 172 - Enhancements: 173 VP8 optimizations for MIPS dspr2 174 vpxenc: add -quiet option 175 176 - Speed: 177 Encoder and decoder speed is consistent with the Eider release. 178 179 - Quality: 180 In general, quality is consistent with the Eider release. 181 182 Minor tweaks to ARNR filtering 183 Minor improvements to real time encoding with multiple temporal layers 184 185 - Bug Fixes: 186 Fixes multithreaded encoder race condition in loopfilter 187 Fixes multi-resolution threaded encoding 188 Fix potential encoder dead-lock after picture resize 189 190 191 2012-05-09 v1.1.0 "Eider" 192 This introduces a number of enhancements, mostly focused on real-time 193 encoding. In addition, it fixes a decoder bug (first introduced in 194 Duclair) so all users of that release are encouraged to upgrade. 195 196 - Upgrading: 197 This release is ABI and API compatible with Duclair (v1.0.0). Users 198 of older releases should refer to the Upgrading notes in this 199 document for that release. 200 201 This release introduces a new temporal denoiser, controlled by the 202 VP8E_SET_NOISE_SENSITIVITY control. The temporal denoiser does not 203 currently take a strength parameter, so the control is effectively 204 a boolean - zero (off) or non-zero (on). For compatibility with 205 existing applications, the values accepted are the same as those 206 for the spatial denoiser (0-6). The temporal denoiser is enabled 207 by default, and the older spatial denoiser may be restored by 208 configuring with --disable-temporal-denoising. The temporal denoiser 209 is more computationally intensive than the spatial one. 210 211 This release removes support for a legacy, decode only API that was 212 supported, but deprecated, at the initial release of libvpx 213 (v0.9.0). This is not expected to have any impact. If you are 214 impacted, you can apply a reversion to commit 2bf8fb58 locally. 215 Please update to the latest libvpx API if you are affected. 216 217 - Enhancements: 218 Adds a motion compensated temporal denoiser to the encoder, which 219 gives higher quality than the older spatial denoiser. (See above 220 for notes on upgrading). 221 222 In addition, support for new compilers and platforms were added, 223 including: 224 improved support for XCode 225 Android x86 NDK build 226 OS/2 support 227 SunCC support 228 229 Changing resolution with vpx_codec_enc_config_set() is now 230 supported. Previously, reinitializing the codec was required to 231 change the input resolution. 232 233 The vpxenc application has initial support for producing multiple 234 encodes from the same input in one call. Resizing is not yet 235 supported, but varying other codec parameters is. Use -- to 236 delineate output streams. Options persist from one stream to the 237 next. 238 239 Also, the vpxenc application will now use a keyframe interval of 240 5 seconds by default. Use the --kf-max-dist option to override. 241 242 - Speed: 243 Decoder performance improved 2.5% versus Duclair. Encoder speed is 244 consistent with Duclair for most material. Two pass encoding of 245 slideshow-like material will see significant improvements. 246 247 Large realtime encoding speed gains at a small quality expense are 248 possible by configuring the on-the-fly bitpacking experiment with 249 --enable-onthefly-bitpacking. Realtime encoder can be up to 13% 250 faster (ARM) depending on the number of threads and bitrate 251 settings. This technique sees constant gain over the 5-16 speed 252 range. For VC style input the loss seen is up to 0.2dB. See commit 253 52cf4dca for further details. 254 255 - Quality: 256 On the whole, quality is consistent with the Duclair release. Some 257 tweaks: 258 259 Reduced blockiness in easy sections by applying a penalty to 260 intra modes. 261 262 Improved quality of static sections (like slideshows) with 263 two pass encoding. 264 265 Improved keyframe sizing with multiple temporal layers 266 267 - Bug Fixes: 268 Corrected alt-ref contribution to frame rate for visible updates 269 to the alt-ref buffer. This affected applications making manual 270 usage of the frame reference flags, or temporal layers. 271 272 Additional constraints were added to disable multi-frame quality 273 enhancement (MFQE) in sections of the frame where there is motion. 274 (#392) 275 276 Fixed corruption issues when vpx_codec_enc_config_set() was called 277 with spatial resampling enabled. 278 279 Fixed a decoder error introduced in Duclair where the segmentation 280 map was not being reinitialized on keyframes (#378) 281 282 283 2012-01-27 v1.0.0 "Duclair" 284 Our fourth named release, focused on performance and features related to 285 real-time encoding. It also fixes a decoder crash bug introduced in 286 v0.9.7, so all users of that release are encouraged to upgrade. 287 288 - Upgrading: 289 This release is ABI incompatible with prior releases of libvpx, so the 290 "major" version number has been bumped to 1. You must recompile your 291 applications against the latest version of the libvpx headers. The 292 API remains compatible, and this should not require code changes in most 293 applications. 294 295 - Enhancements: 296 This release introduces several substantial new features to the encoder, 297 of particular interest to real time streaming applications. 298 299 Temporal scalability allows the encoder to produce a stream that can 300 be decimated to different frame rates, with independent rate targetting 301 for each substream. 302 303 Multiframe quality enhancement postprocessing can make visual quality 304 more consistent in the presence of frames that are substantially 305 different quality than the surrounding frames, as in the temporal 306 scalability case and in some forced keyframe scenarios. 307 308 Multiple-resolution encoding support allows the encoding of the 309 same content at different resolutions faster than encoding them 310 separately. 311 312 - Speed: 313 Optimization targets for this release included the decoder and the real- 314 time modes of the encoder. Decoder speed on x86 has improved 10.5% with 315 this release. Encoder improvements followed a curve where speeds 1-3 316 improved 4.0%-1.5%, speeds 4-8 improved <1%, and speeds 9-16 improved 317 1.5% to 10.5%, respectively. "Best" mode speed is consistent with the 318 Cayuga release. 319 320 - Quality: 321 Encoder quality in the single stream case is consistent with the Cayuga 322 release. 323 324 - Bug Fixes: 325 This release fixes an OOB read decoder crash bug present in v0.9.7 326 related to the clamping of motion vectors in SPLITMV blocks. This 327 behavior could be triggered by corrupt input or by starting 328 decoding from a P-frame. 329 330 331 2011-08-15 v0.9.7-p1 "Cayuga" patch 1 332 This is an incremental bugfix release against Cayuga. All users of that 333 release are strongly encouraged to upgrade. 334 335 - Fix potential OOB reads (cdae03a) 336 337 An unbounded out of bounds read was discovered when the 338 decoder was requested to perform error concealment (new in 339 Cayuga) given a frame with corrupt partition sizes. 340 341 A bounded out of bounds read was discovered affecting all 342 versions of libvpx. Given an multipartition input frame that 343 is truncated between the mode/mv partition and the first 344 residiual paritition (in the block of partition offsets), up 345 to 3 extra bytes could have been read from the source buffer. 346 The code will not take any action regardless of the contents 347 of these undefined bytes, as the truncated buffer is detected 348 immediately following the read based on the calculated 349 starting position of the coefficient partition. 350 351 - Fix potential error concealment crash when the very first frame 352 is missing or corrupt (a609be5) 353 354 - Fix significant artifacts in error concealment (a4c2211, 99d870a) 355 356 - Revert 1-pass CBR rate control changes (e961317) 357 Further testing showed this change produced undesirable visual 358 artifacts, rolling back for now. 359 360 361 2011-08-02 v0.9.7 "Cayuga" 362 Our third named release, focused on a faster, higher quality, encoder. 363 364 - Upgrading: 365 This release is backwards compatible with Aylesbury (v0.9.5) and 366 Bali (v0.9.6). Users of older releases should refer to the Upgrading 367 notes in this document for that release. 368 369 - Enhancements: 370 Stereo 3D format support for vpxenc 371 Runtime detection of available processor cores. 372 Allow specifying --end-usage by enum name 373 vpxdec: test for frame corruption 374 vpxenc: add quantizer histogram display 375 vpxenc: add rate histogram display 376 Set VPX_FRAME_IS_DROPPABLE 377 update configure for ios sdk 4.3 378 Avoid text relocations in ARM vp8 decoder 379 Generate a vpx.pc file for pkg-config. 380 New ways of passing encoded data between encoder and decoder. 381 382 - Speed: 383 This release includes across-the-board speed improvements to the 384 encoder. On x86, these measure at approximately 11.5% in Best mode, 385 21.5% in Good mode (speed 0), and 22.5% in Realtime mode (speed 6). 386 On ARM Cortex A9 with Neon extensions, real-time encoding of video 387 telephony content is 35% faster than Bali on single core and 48% 388 faster on multi-core. On the NVidia Tegra2 platform, real time 389 encoding is 40% faster than Bali. 390 391 Decoder speed was not a priority for this release, but improved 392 approximately 8.4% on x86. 393 394 Reduce motion vector search on alt-ref frame. 395 Encoder loopfilter running in its own thread 396 Reworked loopfilter to precalculate more parameters 397 SSE2/SSSE3 optimizations for build_predictors_mbuv{,_s}(). 398 Make hor UV predict ~2x faster (73 vs 132 cycles) using SSSE3. 399 Removed redundant checks 400 Reduced structure sizes 401 utilize preload in ARMv6 MC/LPF/Copy routines 402 ARM optimized quantization, dfct, variance, subtract 403 Increase chrow row alignment to 16 bytes. 404 disable trellis optimization for first pass 405 Write SSSE3 sub-pixel filter function 406 Improve SSE2 half-pixel filter funtions 407 Add vp8_sub_pixel_variance16x8_ssse3 function 408 Reduce unnecessary distortion computation 409 Use diamond search to replace full search 410 Preload reference area in sub-pixel motion search (real-time mode) 411 412 - Quality: 413 This release focused primarily on one-pass use cases, including 414 video conferencing. Low latency data rate control was significantly 415 improved, improving streamability over bandwidth constrained links. 416 Added support for error concealment, allowing frames to maintain 417 visual quality in the presence of substantial packet loss. 418 419 Add rc_max_intra_bitrate_pct control 420 Limit size of initial keyframe in one-pass. 421 Improve framerate adaptation 422 Improved 1-pass CBR rate control 423 Improved KF insertion after fades to still. 424 Improved key frame detection. 425 Improved activity masking (lower PSNR impact for same SSIM boost) 426 Improved interaction between GF and ARFs 427 Adding error-concealment to the decoder. 428 Adding support for independent partitions 429 Adjusted rate-distortion constants 430 431 432 - Bug Fixes: 433 Removed firstpass motion map 434 Fix parallel make install 435 Fix multithreaded encoding for 1 MB wide frame 436 Fixed iwalsh_neon build problems with RVDS4.1 437 Fix semaphore emulation, spin-wait intrinsics on Windows 438 Fix build with xcode4 and simplify GLOBAL. 439 Mark ARM asm objects as allowing a non-executable stack. 440 Fix vpxenc encoding incorrect webm file header on big endian 441 442 443 2011-03-07 v0.9.6 "Bali" 444 Our second named release, focused on a faster, higher quality, encoder. 445 446 - Upgrading: 447 This release is backwards compatible with Aylesbury (v0.9.5). Users 448 of older releases should refer to the Upgrading notes in this 449 document for that release. 450 451 - Enhancements: 452 vpxenc --psnr shows a summary when encode completes 453 --tune=ssim option to enable activity masking 454 improved postproc visualizations for development 455 updated support for Apple iOS to SDK 4.2 456 query decoder to determine which reference frames were updated 457 implemented error tracking in the decoder 458 fix pipe support on windows 459 460 - Speed: 461 Primary focus was on good quality mode, speed 0. Average improvement 462 on x86 about 40%, up to 100% on user-generated content at that speed. 463 Best quality mode speed improved 35%, and realtime speed 10-20%. This 464 release also saw significant improvement in realtime encoding speed 465 on ARM platforms. 466 467 Improved encoder threading 468 Dont pick encoder filter level when loopfilter is disabled. 469 Avoid double copying of key frames into alt and golden buffer 470 FDCT optimizations. 471 x86 sse2 temporal filter 472 SSSE3 version of fast quantizer 473 vp8_rd_pick_best_mbsegmentation code restructure 474 Adjusted breakout RD for SPLITMV 475 Changed segmentation check order 476 Improved rd_pick_intra4x4block 477 Adds armv6 optimized variance calculation 478 ARMv6 optimized sad16x16 479 ARMv6 optimized half pixel variance calculations 480 Full search SAD function optimization in SSE4.1 481 Improve MV prediction accuracy to achieve performance gain 482 Improve MV prediction in vp8_pick_inter_mode() for speed>3 483 484 - Quality: 485 Best quality mode improved PSNR 6.3%, and SSIM 6.1%. This release 486 also includes support for "activity masking," which greatly improves 487 SSIM at the expense of PSNR. For now, this feature is available with 488 the --tune=ssim option. Further experimentation in this area 489 is ongoing. This release also introduces a new rate control mode 490 called "CQ," which changes the allocation of bits within a clip to 491 the sections where they will have the most visual impact. 492 493 Tuning for the more exact quantizer. 494 Relax rate control for last few frames 495 CQ Mode 496 Limit key frame quantizer for forced key frames. 497 KF/GF Pulsing 498 Add simple version of activity masking. 499 make rdmult adaptive for intra in quantizer RDO 500 cap the best quantizer for 2nd order DC 501 change the threshold of DC check for encode breakout 502 503 - Bug Fixes: 504 Fix crash on Sparc Solaris. 505 Fix counter of fixed keyframe distance 506 ARNR filter pointer update bug fix 507 Fixed use of motion percentage in KF/GF group calc 508 Changed condition for using RD in Intra Mode 509 Fix encoder real-time only configuration. 510 Fix ARM encoder crash with multiple token partitions 511 Fixed bug first cluster timecode of webm file is wrong. 512 Fixed various encoder bugs with odd-sized images 513 vp8e_get_preview fixed when spatial resampling enabled 514 quantizer: fix assertion in fast quantizer path 515 Allocate source buffers to be multiples of 16 516 Fix for manual Golden frame frequency 517 Fix drastic undershoot in long form content 518 519 520 2010-10-28 v0.9.5 "Aylesbury" 521 Our first named release, focused on a faster decoder, and a better encoder. 522 523 - Upgrading: 524 This release incorporates backwards-incompatible changes to the 525 ivfenc and ivfdec tools. These tools are now called vpxenc and vpxdec. 526 527 vpxdec 528 * the -q (quiet) option has been removed, and replaced with 529 -v (verbose). the output is quiet by default. Use -v to see 530 the version number of the binary. 531 532 * The default behavior is now to write output to a single file 533 instead of individual frames. The -y option has been removed. 534 Y4M output is the default. 535 536 * For raw I420/YV12 output instead of Y4M, the --i420 or --yv12 537 options must be specified. 538 539 $ ivfdec -o OUTPUT INPUT 540 $ vpxdec --i420 -o OUTPUT INPUT 541 542 * If an output file is not specified, the default is to write 543 Y4M to stdout. This makes piping more natural. 544 545 $ ivfdec -y -o - INPUT | ... 546 $ vpxdec INPUT | ... 547 548 * The output file has additional flexibility for formatting the 549 filename. It supports escape characters for constructing a 550 filename from the width, height, and sequence number. This 551 replaces the -p option. To get the equivalent: 552 553 $ ivfdec -p frame INPUT 554 $ vpxdec --i420 -o frame-%wx%h-%4.i420 INPUT 555 556 vpxenc 557 * The output file must be specified with -o, rather than as the 558 last argument. 559 560 $ ivfenc <options> INPUT OUTPUT 561 $ vpxenc <options> -o OUTPUT INPUT 562 563 * The output defaults to webm. To get IVF output, use the --ivf 564 option. 565 566 $ ivfenc <options> INPUT OUTPUT.ivf 567 $ vpxenc <options> -o OUTPUT.ivf --ivf INPUT 568 569 570 - Enhancements: 571 ivfenc and ivfdec have been renamed to vpxenc, vpxdec. 572 vpxdec supports .webm input 573 vpxdec writes .y4m by default 574 vpxenc writes .webm output by default 575 vpxenc --psnr now shows the average/overall PSNR at the end 576 ARM platforms now support runtime cpu detection 577 vpxdec visualizations added for motion vectors, block modes, references 578 vpxdec now silent by default 579 vpxdec --progress shows frame-by-frame timing information 580 vpxenc supports the distinction between --fps and --timebase 581 NASM is now a supported assembler 582 configure: enable PIC for shared libs by default 583 configure: add --enable-small 584 configure: support for ppc32-linux-gcc 585 configure: support for sparc-solaris-gcc 586 587 - Bugs: 588 Improve handling of invalid frames 589 Fix valgrind errors in the NEON loop filters. 590 Fix loopfilter delta zero transitions 591 Fix valgrind errors in vp8_sixtap_predict8x4_armv6(). 592 Build fixes for darwin-icc 593 594 - Speed: 595 20-40% (average 28%) improvement in libvpx decoder speed, 596 including: 597 Rewrite vp8_short_walsh4x4_sse2() 598 Optimizations on the loopfilters. 599 Miscellaneous improvements for Atom 600 Add 4-tap version of 2nd-pass ARMv6 MC filter. 601 Improved multithread utilization 602 Better instruction choices on x86 603 reorder data to use wider instructions 604 Update NEON wide idcts 605 Make block access to frame buffer sequential 606 Improved subset block search 607 Bilinear subpixel optimizations for ssse3. 608 Decrease memory footprint 609 610 Encoder speed improvements (percentage gain not measured): 611 Skip unnecessary search of identical frames 612 Add SSE2 subtract functions 613 Improve bounds checking in vp8_diamond_search_sadx4() 614 Added vp8_fast_quantize_b_sse2 615 616 - Quality: 617 Over 7% overall PSNR improvement (6.3% SSIM) in "best" quality 618 encoding mode, and up to 60% improvement on very noisy, still 619 or slow moving source video 620 621 Motion compensated temporal filter for Alt-Ref Noise Reduction 622 Improved use of trellis quantization on 2nd order Y blocks 623 Tune effect of motion on KF/GF boost in two pass 624 Allow coefficient optimization for good quality speed 0. 625 Improved control of active min quantizer for two pass. 626 Enable ARFs for non-lagged compress 627 628 2010-09-02 v0.9.2 629 - Enhancements: 630 Disable frame dropping by default 631 Improved multithreaded performance 632 Improved Force Key Frame Behaviour 633 Increased rate control buffer level precision 634 Fix bug in 1st pass motion compensation 635 ivfenc: correct fixed kf interval, --disable-kf 636 - Speed: 637 Changed above and left context data layout 638 Rework idct calling structure. 639 Removed unnecessary MB_MODE_INFO copies 640 x86: SSSE3 sixtap prediction 641 Reworked IDCT to include reconstruction (add) step 642 Swap alt/gold/new/last frame buffer ptrs instead of copying. 643 Improve SSE2 loopfilter functions 644 Change bitreader to use a larger window. 645 Avoid loopfilter reinitialization when possible 646 - Quality: 647 Normalize quantizer's zero bin and rounding factors 648 Add trellis quantization. 649 Make the quantizer exact. 650 Updates to ARNR filtering algorithm 651 Fix breakout thresh computation for golden & AltRef frames 652 Redo the forward 4x4 dct 653 Improve the accuracy of forward walsh-hadamard transform 654 Further adjustment of RD behaviour with Q and Zbin. 655 - Build System: 656 Allow linking of libs built with MinGW to MSVC 657 Fix target auto-detection on mingw32 658 Allow --cpu= to work for x86. 659 configure: pass original arguments through to make dist 660 Fix builds without runtime CPU detection 661 msvs: fix install of codec sources 662 msvs: Change devenv.com command line for better msys support 663 msvs: Add vs9 targets. 664 Add x86_64-linux-icc target 665 - Bugs: 666 Potential crashes on older MinGW builds 667 Fix two-pass framrate for Y4M input. 668 Fixed simple loop filter, other crashes on ARM v6 669 arm: fix missing dependency with --enable-shared 670 configure: support directories containing .o 671 Replace pinsrw (SSE) with MMX instructions 672 apple: include proper mach primatives 673 Fixed rate control bug with long key frame interval. 674 Fix DSO link errors on x86-64 when not using a version script 675 Fixed buffer selection for UV in AltRef filtering 676 677 678 2010-06-17 v0.9.1 679 - Enhancements: 680 * ivfenc/ivfdec now support YUV4MPEG2 input and pipe I/O 681 * Speed optimizations 682 - Bugfixes: 683 * Rate control 684 * Prevent out-of-bounds accesses on invalid data 685 - Build system updates: 686 * Detect toolchain to be used automatically for native builds 687 * Support building shared libraries 688 * Better autotools emulation (--prefix, --libdir, DESTDIR) 689 - Updated LICENSE 690 * http://webmproject.blogspot.com/2010/06/changes-to-webm-open-source-license.html 691 692 693 2010-05-18 v0.9.0 694 - Initial open source release. Welcome to WebM and VP8! 695 696
