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 INPUT OUTPUT $ vpxenc -o OUTPUT INPUT * The output defaults to webm. To get IVF output, use the --ivf option. $ ivfenc INPUT OUTPUT.ivf $ vpxenc -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!