Unified · Split
| @@ -1,3 +1,51 @@ | |||
| 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 | 2011-08-15 v0.9.7-p1 "Cayuga" patch 1 | 49 | 2011-08-15 v0.9.7-p1 "Cayuga" patch 1 |
| 2 | This is an incremental bugfix release against Cayuga. All users of that | 50 | This is an incremental bugfix release against Cayuga. All users of that |
| 3 | release are strongly encouraged to upgrade. | 51 | release are strongly encouraged to upgrade. |