| 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! |
| |
