+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
projects / profile / ivi / libvpx.git / blobdiff