Unified · Split
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| 1 | 2010-09-02 v0.9.5 "Aylesbury" | ||
| 2 | Our first named release, focused on a faster decoder, and a better encoder. | ||
| 3 | |||
| 4 | - Upgrading: | ||
| 5 | This release incorporates backwards-incompatible changes to the | ||
| 6 | ivfenc and ivfdec tools. These tools are now called vpxenc and vpxdec. | ||
| 7 | |||
| 8 | vpxdec | ||
| 9 | * the -q (quiet) option has been removed, and replaced with | ||
| 10 | -v (verbose). the output is quiet by default. Use -v to see | ||
| 11 | the version number of the binary. | ||
| 12 | |||
| 13 | * The default behavior is now to write output to a single file | ||
| 14 | instead of individual frames. The -y option has been removed. | ||
| 15 | Y4M output is the default. | ||
| 16 | |||
| 17 | * For raw I420/YV12 output instead of Y4M, the --i420 or --yv12 | ||
| 18 | options must be specified. | ||
| 19 | |||
| 20 | $ ivfdec -o OUTPUT INPUT | ||
| 21 | $ vpxdec --i420 -o OUTPUT INPUT | ||
| 22 | |||
| 23 | * If an output file is not specified, the default is to write | ||
| 24 | Y4M to stdout. This makes piping more natural. | ||
| 25 | |||
| 26 | $ ivfdec -y -o - INPUT | ... | ||
| 27 | $ vpxdec INPUT | ... | ||
| 28 | |||
| 29 | * The output file has additional flexibility for formatting the | ||
| 30 | filename. It supports escape characters for constructing a | ||
| 31 | filename from the width, height, and sequence number. This | ||
| 32 | replaces the -p option. To get the equivalent: | ||
| 33 | |||
| 34 | $ ivfdec -p frame INPUT | ||
| 35 | $ vpxdec --i420 -o frame-%wx%h-%4.i420 INPUT | ||
| 36 | |||
| 37 | vpxenc | ||
| 38 | * The output file must be specified with -o, rather than as the | ||
| 39 | last argument. | ||
| 40 | |||
| 41 | $ ivfenc <options> INPUT OUTPUT | ||
| 42 | $ vpxenc <options> -o OUTPUT INPUT | ||
| 43 | |||
| 44 | * The output defaults to webm. To get IVF output, use the --ivf | ||
| 45 | option. | ||
| 46 | |||
| 47 | $ ivfenc <options> INPUT OUTPUT.ivf | ||
| 48 | $ vpxenc <options> -o OUTPUT.ivf --ivf INPUT | ||
| 49 | |||
| 50 | |||
| 51 | - Enhancements: | ||
| 52 | ivfenc and ivfdec have been renamed to vpxenc, vpxdec. | ||
| 53 | vpxdec supports .webm input | ||
| 54 | vpxdec writes .y4m by default | ||
| 55 | vpxenc writes .webm output by default | ||
| 56 | vpxenc --psnr now shows the average/overall PSNR at the end | ||
| 57 | ARM platforms now support runtime cpu detection | ||
| 58 | vpxdec visualizations added for motion vectors, block modes, references | ||
| 59 | vpxdec now silent by default | ||
| 60 | vpxdec --progress shows frame-by-frame timing information | ||
| 61 | vpxenc supports the distinction between --fps and --timebase | ||
| 62 | NASM is now a supported assembler | ||
| 63 | configure: enable PIC for shared libs by default | ||
| 64 | configure: add --enable-small | ||
| 65 | configure: support for ppc32-linux-gcc | ||
| 66 | configure: support for sparc-solaris-gcc | ||
| 67 | |||
| 68 | - Bugs: | ||
| 69 | Improve handling of invalid frames | ||
| 70 | Fix valgrind errors in the NEON loop filters. | ||
| 71 | Fix loopfilter delta zero transitions | ||
| 72 | Fix valgrind errors in vp8_sixtap_predict8x4_armv6(). | ||
| 73 | Build fixes for darwin-icc | ||
| 74 | |||
| 75 | - Speed: | ||
| 76 | 20-40% (average 28%) improvement in libvpx decoder speed, | ||
| 77 | including: | ||
| 78 | Rewrite vp8_short_walsh4x4_sse2() | ||
| 79 | Optimizations on the loopfilters. | ||
| 80 | Miscellaneous improvements for Atom | ||
| 81 | Add 4-tap version of 2nd-pass ARMv6 MC filter. | ||
| 82 | Improved multithread utilization | ||
| 83 | Better instruction choices on x86 | ||
| 84 | reorder data to use wider instructions | ||
| 85 | Update NEON wide idcts | ||
| 86 | Make block access to frame buffer sequential | ||
| 87 | Improved subset block search | ||
| 88 | Bilinear subpixel optimizations for ssse3. | ||
| 89 | Decrease memory footprint | ||
| 90 | |||
| 91 | Encoder speed improvements (percentage gain not measured): | ||
| 92 | Skip unnecessary search of identical frames | ||
| 93 | Add SSE2 subtract functions | ||
| 94 | Improve bounds checking in vp8_diamond_search_sadx4() | ||
| 95 | Added vp8_fast_quantize_b_sse2 | ||
| 96 | |||
| 97 | - Quality: | ||
| 98 | Over 7% overall PSNR improvement (6.3% SSIM) in "best" quality | ||
| 99 | encoding mode, and up to 60% improvement on very noisy, still | ||
| 100 | or slow moving source video | ||
| 101 | |||
| 102 | Motion compensated temporal filter for Alt-Ref Noise Reduction | ||
| 103 | Improved use of trellis quantization on 2nd order Y blocks | ||
| 104 | Tune effect of motion on KF/GF boost in two pass | ||
| 105 | Allow coefficient optimization for good quality speed 0. | ||
| 106 | Improved control of active min quantizer for two pass. | ||
| 107 | Enable ARFs for non-lagged compress | ||
| 108 | |||
| 1 | 2010-09-02 v0.9.2 | 109 | 2010-09-02 v0.9.2 |
| 2 | - Enhancements: | 110 | - Enhancements: |
| 3 | Disable frame dropping by default | 111 | Disable frame dropping by default |