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| 1 | +2012-01-27 v1.0.0 "Duclair" | |
| 2 | + Our fourth named release, focused on performance and features related to | |
| 3 | + real-time encoding. It also fixes a decoder crash bug introduced in | |
| 4 | + v0.9.7, so all users of that release are encouraged to upgrade. | |
| 5 | + | |
| 6 | + - Upgrading: | |
| 7 | + This release is ABI incompatible with prior releases of libvpx, so the | |
| 8 | + "major" version number has been bumped to 1. You must recompile your | |
| 9 | + applications against the latest version of the libvpx headers. The | |
| 10 | + API remains compatible, and this should not require code changes in most | |
| 11 | + applications. | |
| 12 | + | |
| 13 | + - Enhancements: | |
| 14 | + This release introduces several substantial new features to the encoder, | |
| 15 | + of particular interest to real time streaming applications. | |
| 16 | + | |
| 17 | + Temporal scalability allows the encoder to produce a stream that can | |
| 18 | + be decimated to different frame rates, with independent rate targetting | |
| 19 | + for each substream. | |
| 20 | + | |
| 21 | + Multiframe quality enhancement postprocessing can make visual quality | |
| 22 | + more consistent in the presence of frames that are substantially | |
| 23 | + different quality than the surrounding frames, as in the temporal | |
| 24 | + scalability case and in some forced keyframe scenarios. | |
| 25 | + | |
| 26 | + Multiple-resolution encoding support allows the encoding of the | |
| 27 | + same content at different resolutions faster than encoding them | |
| 28 | + separately. | |
| 29 | + | |
| 30 | + - Speed: | |
| 31 | + Optimization targets for this release included the decoder and the real- | |
| 32 | + time modes of the encoder. Decoder speed on x86 has improved 10.5% with | |
| 33 | + this release. Encoder improvements followed a curve where speeds 1-3 | |
| 34 | + improved 4.0%-1.5%, speeds 4-8 improved <1%, and speeds 9-16 improved | |
| 35 | + 1.5% to 10.5%, respectively. "Best" mode speed is consistent with the | |
| 36 | + Cayuga release. | |
| 37 | + | |
| 38 | + - Quality: | |
| 39 | + Encoder quality in the single stream case is consistent with the Cayuga | |
| 40 | + release. | |
| 41 | + | |
| 42 | + - Bug Fixes: | |
| 43 | + This release fixes an OOB read decoder crash bug present in v0.9.7 | |
| 44 | + related to the clamping of motion vectors in SPLITMV blocks. This | |
| 45 | + behavior could be triggered by corrupt input or by starting | |
| 46 | + decoding from a P-frame. | |
| 47 | + | |
| 48 | + | |
| 1 | 49 | 2011-08-15 v0.9.7-p1 "Cayuga" patch 1 |
| 2 | 50 | This is an incremental bugfix release against Cayuga. All users of that |
| 3 | 51 | release are strongly encouraged to upgrade. |