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