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//usr/share/doc/libvpx-1.3.0/CHANGELOG
2013-11-15 v1.3.0 "Forest" This release introduces the VP9 codec in a backward-compatible way. All existing users of VP8 can continue to use the library without modification. However, some VP8 options do not map to VP9 in the same manner. The VP9 encoder in this release is not feature complete. Users interested in the encoder are advised to use the git master branch and discuss issues on libvpx mailing lists. - Upgrading: This release is ABI and API compatible with Duclair (v1.0.0). Users of older releases should refer to the Upgrading notes in this document for that release. - Enhancements: Get rid of bashisms in the main build scripts Added usage info on command line options Add lossless compression mode Dll build of libvpx Add additional Mac OS X targets: 10.7, 10.8 and 10.9 (darwin11-13) Add option to disable documentation configure: add --enable-external-build support make: support V=1 as short form of verbose=yes configure: support mingw-w64 configure: support hardfloat armv7 CHOSTS configure: add support for android x86 Add estimated completion time to vpxenc Don't exit on decode errors in vpxenc vpxenc: support scaling prior to encoding vpxdec: support scaling output vpxenc: improve progress indicators with --skip msvs: Don't link to winmm.lib Add a new script for producing vcxproj files Produce Visual Studio 10 and 11 project files Produce Windows Phone project files msvs-build: use msbuild for vs >= 2005 configure: default configure log to config.log Add encoding option --static-thresh - Speed: Miscellaneous speed optimizations for VP8 and VP9. - Quality: In general, quality is consistent with the Eider release. - Bug Fixes: This release represents approximately a year of engineering effort, and contains multiple bug fixes. Please refer to git history for details. 2012-12-21 v1.2.0 This release acts as a checkpoint for a large amount of internal refactoring and testing. It also contains a number of small bugfixes, so all users are encouraged to upgrade. - Upgrading: This release is ABI and API compatible with Duclair (v1.0.0). Users of older releases should refer to the Upgrading notes in this document for that release. - Enhancements: VP8 optimizations for MIPS dspr2 vpxenc: add -quiet option - Speed: Encoder and decoder speed is consistent with the Eider release. - Quality: In general, quality is consistent with the Eider release. Minor tweaks to ARNR filtering Minor improvements to real time encoding with multiple temporal layers - Bug Fixes: Fixes multithreaded encoder race condition in loopfilter Fixes multi-resolution threaded encoding Fix potential encoder dead-lock after picture resize 2012-05-09 v1.1.0 "Eider" This introduces a number of enhancements, mostly focused on real-time encoding. In addition, it fixes a decoder bug (first introduced in Duclair) so all users of that release are encouraged to upgrade. - Upgrading: This release is ABI and API compatible with Duclair (v1.0.0). Users of older releases should refer to the Upgrading notes in this document for that release. This release introduces a new temporal denoiser, controlled by the VP8E_SET_NOISE_SENSITIVITY control. The temporal denoiser does not currently take a strength parameter, so the control is effectively a boolean - zero (off) or non-zero (on). For compatibility with existing applications, the values accepted are the same as those for the spatial denoiser (0-6). The temporal denoiser is enabled by default, and the older spatial denoiser may be restored by configuring with --disable-temporal-denoising. The temporal denoiser is more computationally intensive than the spatial one. This release removes support for a legacy, decode only API that was supported, but deprecated, at the initial release of libvpx (v0.9.0). This is not expected to have any impact. If you are impacted, you can apply a reversion to commit 2bf8fb58 locally. Please update to the latest libvpx API if you are affected. - Enhancements: Adds a motion compensated temporal denoiser to the encoder, which gives higher quality than the older spatial denoiser. (See above for notes on upgrading). In addition, support for new compilers and platforms were added, including: improved support for XCode Android x86 NDK build OS/2 support SunCC support Changing resolution with vpx_codec_enc_config_set() is now supported. Previously, reinitializing the codec was required to change the input resolution. The vpxenc application has initial support for producing multiple encodes from the same input in one call. Resizing is not yet supported, but varying other codec parameters is. Use -- to delineate output streams. Options persist from one stream to the next. Also, the vpxenc application will now use a keyframe interval of 5 seconds by default. Use the --kf-max-dist option to override. - Speed: Decoder performance improved 2.5% versus Duclair. Encoder speed is consistent with Duclair for most material. Two pass encoding of slideshow-like material will see significant improvements. Large realtime encoding speed gains at a small quality expense are possible by configuring the on-the-fly bitpacking experiment with --enable-onthefly-bitpacking. Realtime encoder can be up to 13% faster (ARM) depending on the number of threads and bitrate settings. This technique sees constant gain over the 5-16 speed range. For VC style input the loss seen is up to 0.2dB. See commit 52cf4dca for further details. - Quality: On the whole, quality is consistent with the Duclair release. Some tweaks: Reduced blockiness in easy sections by applying a penalty to intra modes. Improved quality of static sections (like slideshows) with two pass encoding. Improved keyframe sizing with multiple temporal layers - Bug Fixes: Corrected alt-ref contribution to frame rate for visible updates to the alt-ref buffer. This affected applications making manual usage of the frame reference flags, or temporal layers. Additional constraints were added to disable multi-frame quality enhancement (MFQE) in sections of the frame where there is motion. (#392) Fixed corruption issues when vpx_codec_enc_config_set() was called with spatial resampling enabled. Fixed a decoder error introduced in Duclair where the segmentation map was not being reinitialized on keyframes (#378) 2012-01-27 v1.0.0 "Duclair" Our fourth named release, focused on performance and features related to real-time encoding. It also fixes a decoder crash bug introduced in v0.9.7, so all users of that release are encouraged to upgrade. - Upgrading: This release is ABI incompatible with prior releases of libvpx, so the "major" version number has been bumped to 1. You must recompile your applications against the latest version of the libvpx headers. The API remains compatible, and this should not require code changes in most applications. - Enhancements: This release introduces several substantial new features to the encoder, of particular interest to real time streaming applications. Temporal scalability allows the encoder to produce a stream that can be decimated to different frame rates, with independent rate targetting for each substream. Multiframe quality enhancement postprocessing can make visual quality more consistent in the presence of frames that are substantially different quality than the surrounding frames, as in the temporal scalability case and in some forced keyframe scenarios. Multiple-resolution encoding support allows the encoding of the same content at different resolutions faster than encoding them separately. - Speed: Optimization targets for this release included the decoder and the real- time modes of the encoder. Decoder speed on x86 has improved 10.5% with this release. Encoder improvements followed a curve where speeds 1-3 improved 4.0%-1.5%, speeds 4-8 improved <1%, and speeds 9-16 improved 1.5% to 10.5%, respectively. "Best" mode speed is consistent with the Cayuga release. - Quality: Encoder quality in the single stream case is consistent with the Cayuga release. - Bug Fixes: This release fixes an OOB read decoder crash bug present in v0.9.7 related to the clamping of motion vectors in SPLITMV blocks. This behavior could be triggered by corrupt input or by starting decoding from a P-frame. 2011-08-15 v0.9.7-p1 "Cayuga" patch 1 This is an incremental bugfix release against Cayuga. All users of that release are strongly encouraged to upgrade. - Fix potential OOB reads (cdae03a) An unbounded out of bounds read was discovered when the decoder was requested to perform error concealment (new in Cayuga) given a frame with corrupt partition sizes. A bounded out of bounds read was discovered affecting all versions of libvpx. Given an multipartition input frame that is truncated between the mode/mv partition and the first residiual paritition (in the block of partition offsets), up to 3 extra bytes could have been read from the source buffer. The code will not take any action regardless of the contents of these undefined bytes, as the truncated buffer is detected immediately following the read based on the calculated starting position of the coefficient partition. - Fix potential error concealment crash when the very first frame is missing or corrupt (a609be5) - Fix significant artifacts in error concealment (a4c2211, 99d870a) - Revert 1-pass CBR rate control changes (e961317) Further testing showed this change produced undesirable visual artifacts, rolling back for now. 2011-08-02 v0.9.7 "Cayuga" Our third named release, focused on a faster, higher quality, encoder. - Upgrading: This release is backwards compatible with Aylesbury (v0.9.5) and Bali (v0.9.6). Users of older releases should refer to the Upgrading notes in this document for that release. - Enhancements: Stereo 3D format support for vpxenc Runtime detection of available processor cores. Allow specifying --end-usage by enum name vpxdec: test for frame corruption vpxenc: add quantizer histogram display vpxenc: add rate histogram display Set VPX_FRAME_IS_DROPPABLE update configure for ios sdk 4.3 Avoid text relocations in ARM vp8 decoder Generate a vpx.pc file for pkg-config. New ways of passing encoded data between encoder and decoder. - Speed: This release includes across-the-board speed improvements to the encoder. On x86, these measure at approximately 11.5% in Best mode, 21.5% in Good mode (speed 0), and 22.5% in Realtime mode (speed 6). On ARM Cortex A9 with Neon extensions, real-time encoding of video telephony content is 35% faster than Bali on single core and 48% faster on multi-core. On the NVidia Tegra2 platform, real time encoding is 40% faster than Bali. Decoder speed was not a priority for this release, but improved approximately 8.4% on x86. Reduce motion vector search on alt-ref frame. Encoder loopfilter running in its own thread Reworked loopfilter to precalculate more parameters SSE2/SSSE3 optimizations for build_predictors_mbuv{,_s}(). Make hor UV predict ~2x faster (73 vs 132 cycles) using SSSE3. Removed redundant checks Reduced structure sizes utilize preload in ARMv6 MC/LPF/Copy routines ARM optimized quantization, dfct, variance, subtract Increase chrow row alignment to 16 bytes. disable trellis optimization for first pass Write SSSE3 sub-pixel filter function Improve SSE2 half-pixel filter funtions Add vp8_sub_pixel_variance16x8_ssse3 function Reduce unnecessary distortion computation Use diamond search to replace full search Preload reference area in sub-pixel motion search (real-time mode) - Quality: This release focused primarily on one-pass use cases, including video conferencing. Low latency data rate control was significantly improved, improving streamability over bandwidth constrained links. Added support for error concealment, allowing frames to maintain visual quality in the presence of substantial packet loss. Add rc_max_intra_bitrate_pct control Limit size of initial keyframe in one-pass. Improve framerate adaptation Improved 1-pass CBR rate control Improved KF insertion after fades to still. Improved key frame detection. Improved activity masking (lower PSNR impact for same SSIM boost) Improved interaction between GF and ARFs Adding error-concealment to the decoder. Adding support for independent partitions Adjusted rate-distortion constants - Bug Fixes: Removed firstpass motion map Fix parallel make install Fix multithreaded encoding for 1 MB wide frame Fixed iwalsh_neon build problems with RVDS4.1 Fix semaphore emulation, spin-wait intrinsics on Windows Fix build with xcode4 and simplify GLOBAL. Mark ARM asm objects as allowing a non-executable stack. Fix vpxenc encoding incorrect webm file header on big endian 2011-03-07 v0.9.6 "Bali" Our second named release, focused on a faster, higher quality, encoder. - Upgrading: This release is backwards compatible with Aylesbury (v0.9.5). Users of older releases should refer to the Upgrading notes in this document for that release. - Enhancements: vpxenc --psnr shows a summary when encode completes --tune=ssim option to enable activity masking improved postproc visualizations for development updated support for Apple iOS to SDK 4.2 query decoder to determine which reference frames were updated implemented error tracking in the decoder fix pipe support on windows - Speed: Primary focus was on good quality mode, speed 0. Average improvement on x86 about 40%, up to 100% on user-generated content at that speed. Best quality mode speed improved 35%, and realtime speed 10-20%. This release also saw significant improvement in realtime encoding speed on ARM platforms. Improved encoder threading Dont pick encoder filter level when loopfilter is disabled. Avoid double copying of key frames into alt and golden buffer FDCT optimizations. x86 sse2 temporal filter SSSE3 version of fast quantizer vp8_rd_pick_best_mbsegmentation code restructure Adjusted breakout RD for SPLITMV Changed segmentation check order Improved rd_pick_intra4x4block Adds armv6 optimized variance calculation ARMv6 optimized sad16x16 ARMv6 optimized half pixel variance calculations Full search SAD function optimization in SSE4.1 Improve MV prediction accuracy to achieve performance gain Improve MV prediction in vp8_pick_inter_mode() for speed>3 - Quality: Best quality mode improved PSNR 6.3%, and SSIM 6.1%. This release also includes support for "activity masking," which greatly improves SSIM at the expense of PSNR. For now, this feature is available with the --tune=ssim option. Further experimentation in this area is ongoing. This release also introduces a new rate control mode called "CQ," which changes the allocation of bits within a clip to the sections where they will have the most visual impact. Tuning for the more exact quantizer. Relax rate control for last few frames CQ Mode Limit key frame quantizer for forced key frames. KF/GF Pulsing Add simple version of activity masking. make rdmult adaptive for intra in quantizer RDO cap the best quantizer for 2nd order DC change the threshold of DC check for encode breakout - Bug Fixes: Fix crash on Sparc Solaris. Fix counter of fixed keyframe distance ARNR filter pointer update bug fix Fixed use of motion percentage in KF/GF group calc Changed condition for using RD in Intra Mode Fix encoder real-time only configuration. Fix ARM encoder crash with multiple token partitions Fixed bug first cluster timecode of webm file is wrong. Fixed various encoder bugs with odd-sized images vp8e_get_preview fixed when spatial resampling enabled quantizer: fix assertion in fast quantizer path Allocate source buffers to be multiples of 16 Fix for manual Golden frame frequency Fix drastic undershoot in long form content 2010-10-28 v0.9.5 "Aylesbury" Our first named release, focused on a faster decoder, and a better encoder. - Upgrading: This release incorporates backwards-incompatible changes to the ivfenc and ivfdec tools. These tools are now called vpxenc and vpxdec. vpxdec * the -q (quiet) option has been removed, and replaced with -v (verbose). the output is quiet by default. Use -v to see the version number of the binary. * The default behavior is now to write output to a single file instead of individual frames. The -y option has been removed. Y4M output is the default. * For raw I420/YV12 output instead of Y4M, the --i420 or --yv12 options must be specified. $ ivfdec -o OUTPUT INPUT $ vpxdec --i420 -o OUTPUT INPUT * If an output file is not specified, the default is to write Y4M to stdout. This makes piping more natural. $ ivfdec -y -o - INPUT | ... $ vpxdec INPUT | ... * The output file has additional flexibility for formatting the filename. It supports escape characters for constructing a filename from the width, height, and sequence number. This replaces the -p option. To get the equivalent: $ ivfdec -p frame INPUT $ vpxdec --i420 -o frame-%wx%h-%4.i420 INPUT vpxenc * The output file must be specified with -o, rather than as the last argument. $ ivfenc <options> INPUT OUTPUT $ vpxenc <options> -o OUTPUT INPUT * The output defaults to webm. To get IVF output, use the --ivf option. $ ivfenc <options> INPUT OUTPUT.ivf $ vpxenc <options> -o OUTPUT.ivf --ivf INPUT - Enhancements: ivfenc and ivfdec have been renamed to vpxenc, vpxdec. vpxdec supports .webm input vpxdec writes .y4m by default vpxenc writes .webm output by default vpxenc --psnr now shows the average/overall PSNR at the end ARM platforms now support runtime cpu detection vpxdec visualizations added for motion vectors, block modes, references vpxdec now silent by default vpxdec --progress shows frame-by-frame timing information vpxenc supports the distinction between --fps and --timebase NASM is now a supported assembler configure: enable PIC for shared libs by default configure: add --enable-small configure: support for ppc32-linux-gcc configure: support for sparc-solaris-gcc - Bugs: Improve handling of invalid frames Fix valgrind errors in the NEON loop filters. Fix loopfilter delta zero transitions Fix valgrind errors in vp8_sixtap_predict8x4_armv6(). Build fixes for darwin-icc - Speed: 20-40% (average 28%) improvement in libvpx decoder speed, including: Rewrite vp8_short_walsh4x4_sse2() Optimizations on the loopfilters. Miscellaneous improvements for Atom Add 4-tap version of 2nd-pass ARMv6 MC filter. Improved multithread utilization Better instruction choices on x86 reorder data to use wider instructions Update NEON wide idcts Make block access to frame buffer sequential Improved subset block search Bilinear subpixel optimizations for ssse3. Decrease memory footprint Encoder speed improvements (percentage gain not measured): Skip unnecessary search of identical frames Add SSE2 subtract functions Improve bounds checking in vp8_diamond_search_sadx4() Added vp8_fast_quantize_b_sse2 - Quality: Over 7% overall PSNR improvement (6.3% SSIM) in "best" quality encoding mode, and up to 60% improvement on very noisy, still or slow moving source video Motion compensated temporal filter for Alt-Ref Noise Reduction Improved use of trellis quantization on 2nd order Y blocks Tune effect of motion on KF/GF boost in two pass Allow coefficient optimization for good quality speed 0. Improved control of active min quantizer for two pass. Enable ARFs for non-lagged compress 2010-09-02 v0.9.2 - Enhancements: Disable frame dropping by default Improved multithreaded performance Improved Force Key Frame Behaviour Increased rate control buffer level precision Fix bug in 1st pass motion compensation ivfenc: correct fixed kf interval, --disable-kf - Speed: Changed above and left context data layout Rework idct calling structure. Removed unnecessary MB_MODE_INFO copies x86: SSSE3 sixtap prediction Reworked IDCT to include reconstruction (add) step Swap alt/gold/new/last frame buffer ptrs instead of copying. Improve SSE2 loopfilter functions Change bitreader to use a larger window. Avoid loopfilter reinitialization when possible - Quality: Normalize quantizer's zero bin and rounding factors Add trellis quantization. Make the quantizer exact. Updates to ARNR filtering algorithm Fix breakout thresh computation for golden & AltRef frames Redo the forward 4x4 dct Improve the accuracy of forward walsh-hadamard transform Further adjustment of RD behaviour with Q and Zbin. - Build System: Allow linking of libs built with MinGW to MSVC Fix target auto-detection on mingw32 Allow --cpu= to work for x86. configure: pass original arguments through to make dist Fix builds without runtime CPU detection msvs: fix install of codec sources msvs: Change devenv.com command line for better msys support msvs: Add vs9 targets. Add x86_64-linux-icc target - Bugs: Potential crashes on older MinGW builds Fix two-pass framrate for Y4M input. Fixed simple loop filter, other crashes on ARM v6 arm: fix missing dependency with --enable-shared configure: support directories containing .o Replace pinsrw (SSE) with MMX instructions apple: include proper mach primatives Fixed rate control bug with long key frame interval. Fix DSO link errors on x86-64 when not using a version script Fixed buffer selection for UV in AltRef filtering 2010-06-17 v0.9.1 - Enhancements: * ivfenc/ivfdec now support YUV4MPEG2 input and pipe I/O * Speed optimizations - Bugfixes: * Rate control * Prevent out-of-bounds accesses on invalid data - Build system updates: * Detect toolchain to be used automatically for native builds * Support building shared libraries * Better autotools emulation (--prefix, --libdir, DESTDIR) - Updated LICENSE * http://webmproject.blogspot.com/2010/06/changes-to-webm-open-source-license.html 2010-05-18 v0.9.0 - Initial open source release. Welcome to WebM and VP8!
