1 2011-03-07 v0.9.6 "Bali"
2 Our second named release, focused on a faster, higher quality, encoder.
5 This release is backwards compatible with Aylesbury (v0.9.5). Users
6 of older releases should refer to the Upgrading notes in this
7 document for that release.
10 vpxenc --psnr shows a summary when encode completes
11 --tune=ssim option to enable activity masking
12 improved postproc visualizations for development
13 updated support for Apple iOS to SDK 4.2
14 query decoder to determine which reference frames were updated
15 implemented error tracking in the decoder
16 fix pipe support on windows
19 Primary focus was on good quality mode, speed 0. Average improvement
20 on x86 about 40%, up to 100% on user-generated content at that speed.
21 Best quality mode speed improved 35%, and realtime speed 10-20%. This
22 release also saw significant improvement in realtime encoding speed
25 Improved encoder threading
26 Dont pick encoder filter level when loopfilter is disabled.
27 Avoid double copying of key frames into alt and golden buffer
29 x86 sse2 temporal filter
30 SSSE3 version of fast quantizer
31 vp8_rd_pick_best_mbsegmentation code restructure
32 Adjusted breakout RD for SPLITMV
33 Changed segmentation check order
34 Improved rd_pick_intra4x4block
35 Adds armv6 optimized variance calculation
36 ARMv6 optimized sad16x16
37 ARMv6 optimized half pixel variance calculations
38 Full search SAD function optimization in SSE4.1
39 Improve MV prediction accuracy to achieve performance gain
40 Improve MV prediction in vp8_pick_inter_mode() for speed>3
43 Best quality mode improved PSNR 6.3%, and SSIM 6.1%. This release
44 also includes support for "activity masking," which greatly improves
45 SSIM at the expense of PSNR. For now, this feature is available with
46 the --tune=ssim option. Further experimentation in this area
47 is ongoing. This release also introduces a new rate control mode
48 called "CQ," which changes the allocation of bits within a clip to
49 the sections where they will have the most visual impact.
51 Tuning for the more exact quantizer.
52 Relax rate control for last few frames
54 Limit key frame quantizer for forced key frames.
56 Add simple version of activity masking.
57 make rdmult adaptive for intra in quantizer RDO
58 cap the best quantizer for 2nd order DC
59 change the threshold of DC check for encode breakout
62 Fix crash on Sparc Solaris.
63 Fix counter of fixed keyframe distance
64 ARNR filter pointer update bug fix
65 Fixed use of motion percentage in KF/GF group calc
66 Changed condition for using RD in Intra Mode
67 Fix encoder real-time only configuration.
68 Fix ARM encoder crash with multiple token partitions
69 Fixed bug first cluster timecode of webm file is wrong.
70 Fixed various encoder bugs with odd-sized images
71 vp8e_get_preview fixed when spatial resampling enabled
72 quantizer: fix assertion in fast quantizer path
73 Allocate source buffers to be multiples of 16
74 Fix for manual Golden frame frequency
75 Fix drastic undershoot in long form content
78 2010-10-28 v0.9.5 "Aylesbury"
79 Our first named release, focused on a faster decoder, and a better encoder.
82 This release incorporates backwards-incompatible changes to the
83 ivfenc and ivfdec tools. These tools are now called vpxenc and vpxdec.
86 * the -q (quiet) option has been removed, and replaced with
87 -v (verbose). the output is quiet by default. Use -v to see
88 the version number of the binary.
90 * The default behavior is now to write output to a single file
91 instead of individual frames. The -y option has been removed.
92 Y4M output is the default.
94 * For raw I420/YV12 output instead of Y4M, the --i420 or --yv12
95 options must be specified.
97 $ ivfdec -o OUTPUT INPUT
98 $ vpxdec --i420 -o OUTPUT INPUT
100 * If an output file is not specified, the default is to write
101 Y4M to stdout. This makes piping more natural.
103 $ ivfdec -y -o - INPUT | ...
106 * The output file has additional flexibility for formatting the
107 filename. It supports escape characters for constructing a
108 filename from the width, height, and sequence number. This
109 replaces the -p option. To get the equivalent:
111 $ ivfdec -p frame INPUT
112 $ vpxdec --i420 -o frame-%wx%h-%4.i420 INPUT
115 * The output file must be specified with -o, rather than as the
118 $ ivfenc <options> INPUT OUTPUT
119 $ vpxenc <options> -o OUTPUT INPUT
121 * The output defaults to webm. To get IVF output, use the --ivf
124 $ ivfenc <options> INPUT OUTPUT.ivf
125 $ vpxenc <options> -o OUTPUT.ivf --ivf INPUT
129 ivfenc and ivfdec have been renamed to vpxenc, vpxdec.
130 vpxdec supports .webm input
131 vpxdec writes .y4m by default
132 vpxenc writes .webm output by default
133 vpxenc --psnr now shows the average/overall PSNR at the end
134 ARM platforms now support runtime cpu detection
135 vpxdec visualizations added for motion vectors, block modes, references
136 vpxdec now silent by default
137 vpxdec --progress shows frame-by-frame timing information
138 vpxenc supports the distinction between --fps and --timebase
139 NASM is now a supported assembler
140 configure: enable PIC for shared libs by default
141 configure: add --enable-small
142 configure: support for ppc32-linux-gcc
143 configure: support for sparc-solaris-gcc
146 Improve handling of invalid frames
147 Fix valgrind errors in the NEON loop filters.
148 Fix loopfilter delta zero transitions
149 Fix valgrind errors in vp8_sixtap_predict8x4_armv6().
150 Build fixes for darwin-icc
153 20-40% (average 28%) improvement in libvpx decoder speed,
155 Rewrite vp8_short_walsh4x4_sse2()
156 Optimizations on the loopfilters.
157 Miscellaneous improvements for Atom
158 Add 4-tap version of 2nd-pass ARMv6 MC filter.
159 Improved multithread utilization
160 Better instruction choices on x86
161 reorder data to use wider instructions
162 Update NEON wide idcts
163 Make block access to frame buffer sequential
164 Improved subset block search
165 Bilinear subpixel optimizations for ssse3.
166 Decrease memory footprint
168 Encoder speed improvements (percentage gain not measured):
169 Skip unnecessary search of identical frames
170 Add SSE2 subtract functions
171 Improve bounds checking in vp8_diamond_search_sadx4()
172 Added vp8_fast_quantize_b_sse2
175 Over 7% overall PSNR improvement (6.3% SSIM) in "best" quality
176 encoding mode, and up to 60% improvement on very noisy, still
177 or slow moving source video
179 Motion compensated temporal filter for Alt-Ref Noise Reduction
180 Improved use of trellis quantization on 2nd order Y blocks
181 Tune effect of motion on KF/GF boost in two pass
182 Allow coefficient optimization for good quality speed 0.
183 Improved control of active min quantizer for two pass.
184 Enable ARFs for non-lagged compress
188 Disable frame dropping by default
189 Improved multithreaded performance
190 Improved Force Key Frame Behaviour
191 Increased rate control buffer level precision
192 Fix bug in 1st pass motion compensation
193 ivfenc: correct fixed kf interval, --disable-kf
195 Changed above and left context data layout
196 Rework idct calling structure.
197 Removed unnecessary MB_MODE_INFO copies
198 x86: SSSE3 sixtap prediction
199 Reworked IDCT to include reconstruction (add) step
200 Swap alt/gold/new/last frame buffer ptrs instead of copying.
201 Improve SSE2 loopfilter functions
202 Change bitreader to use a larger window.
203 Avoid loopfilter reinitialization when possible
205 Normalize quantizer's zero bin and rounding factors
206 Add trellis quantization.
207 Make the quantizer exact.
208 Updates to ARNR filtering algorithm
209 Fix breakout thresh computation for golden & AltRef frames
210 Redo the forward 4x4 dct
211 Improve the accuracy of forward walsh-hadamard transform
212 Further adjustment of RD behaviour with Q and Zbin.
214 Allow linking of libs built with MinGW to MSVC
215 Fix target auto-detection on mingw32
216 Allow --cpu= to work for x86.
217 configure: pass original arguments through to make dist
218 Fix builds without runtime CPU detection
219 msvs: fix install of codec sources
220 msvs: Change devenv.com command line for better msys support
221 msvs: Add vs9 targets.
222 Add x86_64-linux-icc target
224 Potential crashes on older MinGW builds
225 Fix two-pass framrate for Y4M input.
226 Fixed simple loop filter, other crashes on ARM v6
227 arm: fix missing dependency with --enable-shared
228 configure: support directories containing .o
229 Replace pinsrw (SSE) with MMX instructions
230 apple: include proper mach primatives
231 Fixed rate control bug with long key frame interval.
232 Fix DSO link errors on x86-64 when not using a version script
233 Fixed buffer selection for UV in AltRef filtering
238 * ivfenc/ivfdec now support YUV4MPEG2 input and pipe I/O
239 * Speed optimizations
242 * Prevent out-of-bounds accesses on invalid data
243 - Build system updates:
244 * Detect toolchain to be used automatically for native builds
245 * Support building shared libraries
246 * Better autotools emulation (--prefix, --libdir, DESTDIR)
248 * http://webmproject.blogspot.com/2010/06/changes-to-webm-open-source-license.html
252 - Initial open source release. Welcome to WebM and VP8!