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655 lines
26 KiB
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655 lines
26 KiB
Plaintext
2016-07-20 v1.6.0 "Khaki Campbell Duck"
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This release improves upon the VP9 encoder and speeds up the encoding and
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decoding processes.
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- Upgrading:
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This release is ABI incompatible with 1.5.0 due to a new 'color_range' enum
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in vpx_image and some minor changes to the VP8_COMP structure.
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The default key frame interval for VP9 has changed from 128 to 9999.
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- Enhancement:
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A core focus has been performance for low end Intel processors. SSSE3
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instructions such as 'pshufb' have been avoided and instructions have been
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reordered to better accommodate the more constrained pipelines.
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As a result, devices based on Celeron processors have seen substantial
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decoding improvements. From Indian Runner Duck to Javan Whistling Duck,
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decoding speed improved between 10 and 30%. Between Javan Whistling Duck
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and Khaki Campbell Duck, it improved another 10 to 15%.
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While Celeron benefited most, Core-i5 also improved 5% and 10% between the
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respective releases.
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Realtime performance for WebRTC for both speed and quality has received a
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lot of attention.
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- Bug Fixes:
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A number of fuzzing issues, found variously by Mozilla, Chromium and others,
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have been fixed and we strongly recommend updating.
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2015-11-09 v1.5.0 "Javan Whistling Duck"
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This release improves upon the VP9 encoder and speeds up the encoding and
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decoding processes.
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- Upgrading:
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This release is ABI incompatible with 1.4.0. It drops deprecated VP8
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controls and adds a variety of VP9 controls for testing.
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The vpxenc utility now prefers VP9 by default.
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- Enhancements:
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Faster VP9 encoding and decoding
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Smaller library size by combining functions used by VP8 and VP9
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- Bug Fixes:
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A variety of fuzzing issues
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2015-04-03 v1.4.0 "Indian Runner Duck"
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This release includes significant improvements to the VP9 codec.
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- Upgrading:
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This release is ABI incompatible with 1.3.0. It drops the compatibility
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layer, requiring VPX_IMG_FMT_* instead of IMG_FMT_*, and adds several codec
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controls for VP9.
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- Enhancements:
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Faster VP9 encoding and decoding
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Multithreaded VP9 decoding (tile and frame-based)
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Multithreaded VP9 encoding - on by default
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YUV 4:2:2 and 4:4:4 support in VP9
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10 and 12bit support in VP9
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64bit ARM support by replacing ARM assembly with intrinsics
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- Bug Fixes:
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Fixes a VP9 bitstream issue in Profile 1. This only affected non-YUV 4:2:0
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files.
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- Known Issues:
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Frame Parallel decoding fails for segmented and non-420 files.
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2013-11-15 v1.3.0 "Forest"
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This release introduces the VP9 codec in a backward-compatible way.
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All existing users of VP8 can continue to use the library without
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modification. However, some VP8 options do not map to VP9 in the same manner.
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The VP9 encoder in this release is not feature complete. Users interested in
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the encoder are advised to use the git master branch and discuss issues on
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libvpx mailing lists.
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- Upgrading:
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This release is ABI and API compatible with Duclair (v1.0.0). Users
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of older releases should refer to the Upgrading notes in this document
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for that release.
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- Enhancements:
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Get rid of bashisms in the main build scripts
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Added usage info on command line options
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Add lossless compression mode
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Dll build of libvpx
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Add additional Mac OS X targets: 10.7, 10.8 and 10.9 (darwin11-13)
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Add option to disable documentation
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configure: add --enable-external-build support
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make: support V=1 as short form of verbose=yes
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configure: support mingw-w64
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configure: support hardfloat armv7 CHOSTS
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configure: add support for android x86
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Add estimated completion time to vpxenc
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Don't exit on decode errors in vpxenc
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vpxenc: support scaling prior to encoding
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vpxdec: support scaling output
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vpxenc: improve progress indicators with --skip
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msvs: Don't link to winmm.lib
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Add a new script for producing vcxproj files
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Produce Visual Studio 10 and 11 project files
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Produce Windows Phone project files
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msvs-build: use msbuild for vs >= 2005
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configure: default configure log to config.log
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Add encoding option --static-thresh
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- Speed:
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Miscellaneous speed optimizations for VP8 and VP9.
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- Quality:
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In general, quality is consistent with the Eider release.
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- Bug Fixes:
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This release represents approximately a year of engineering effort,
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and contains multiple bug fixes. Please refer to git history for details.
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2012-12-21 v1.2.0
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This release acts as a checkpoint for a large amount of internal refactoring
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and testing. It also contains a number of small bugfixes, so all users are
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encouraged to upgrade.
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- Upgrading:
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This release is ABI and API compatible with Duclair (v1.0.0). Users
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of older releases should refer to the Upgrading notes in this
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document for that release.
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- Enhancements:
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VP8 optimizations for MIPS dspr2
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vpxenc: add -quiet option
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- Speed:
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Encoder and decoder speed is consistent with the Eider release.
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- Quality:
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In general, quality is consistent with the Eider release.
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Minor tweaks to ARNR filtering
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Minor improvements to real time encoding with multiple temporal layers
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- Bug Fixes:
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Fixes multithreaded encoder race condition in loopfilter
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Fixes multi-resolution threaded encoding
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Fix potential encoder dead-lock after picture resize
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2012-05-09 v1.1.0 "Eider"
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This introduces a number of enhancements, mostly focused on real-time
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encoding. In addition, it fixes a decoder bug (first introduced in
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Duclair) so all users of that release are encouraged to upgrade.
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- Upgrading:
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This release is ABI and API compatible with Duclair (v1.0.0). Users
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of older releases should refer to the Upgrading notes in this
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document for that release.
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This release introduces a new temporal denoiser, controlled by the
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VP8E_SET_NOISE_SENSITIVITY control. The temporal denoiser does not
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currently take a strength parameter, so the control is effectively
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a boolean - zero (off) or non-zero (on). For compatibility with
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existing applications, the values accepted are the same as those
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for the spatial denoiser (0-6). The temporal denoiser is enabled
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by default, and the older spatial denoiser may be restored by
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configuring with --disable-temporal-denoising. The temporal denoiser
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is more computationally intensive than the spatial one.
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This release removes support for a legacy, decode only API that was
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supported, but deprecated, at the initial release of libvpx
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(v0.9.0). This is not expected to have any impact. If you are
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impacted, you can apply a reversion to commit 2bf8fb58 locally.
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Please update to the latest libvpx API if you are affected.
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- Enhancements:
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Adds a motion compensated temporal denoiser to the encoder, which
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gives higher quality than the older spatial denoiser. (See above
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for notes on upgrading).
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In addition, support for new compilers and platforms were added,
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including:
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improved support for XCode
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Android x86 NDK build
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OS/2 support
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SunCC support
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Changing resolution with vpx_codec_enc_config_set() is now
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supported. Previously, reinitializing the codec was required to
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change the input resolution.
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The vpxenc application has initial support for producing multiple
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encodes from the same input in one call. Resizing is not yet
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supported, but varying other codec parameters is. Use -- to
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delineate output streams. Options persist from one stream to the
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next.
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Also, the vpxenc application will now use a keyframe interval of
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5 seconds by default. Use the --kf-max-dist option to override.
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- Speed:
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Decoder performance improved 2.5% versus Duclair. Encoder speed is
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consistent with Duclair for most material. Two pass encoding of
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slideshow-like material will see significant improvements.
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Large realtime encoding speed gains at a small quality expense are
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possible by configuring the on-the-fly bitpacking experiment with
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--enable-onthefly-bitpacking. Realtime encoder can be up to 13%
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faster (ARM) depending on the number of threads and bitrate
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settings. This technique sees constant gain over the 5-16 speed
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range. For VC style input the loss seen is up to 0.2dB. See commit
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52cf4dca for further details.
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- Quality:
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On the whole, quality is consistent with the Duclair release. Some
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tweaks:
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Reduced blockiness in easy sections by applying a penalty to
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intra modes.
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Improved quality of static sections (like slideshows) with
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two pass encoding.
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Improved keyframe sizing with multiple temporal layers
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- Bug Fixes:
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Corrected alt-ref contribution to frame rate for visible updates
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to the alt-ref buffer. This affected applications making manual
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usage of the frame reference flags, or temporal layers.
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Additional constraints were added to disable multi-frame quality
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enhancement (MFQE) in sections of the frame where there is motion.
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(#392)
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Fixed corruption issues when vpx_codec_enc_config_set() was called
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with spatial resampling enabled.
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Fixed a decoder error introduced in Duclair where the segmentation
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map was not being reinitialized on keyframes (#378)
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2012-01-27 v1.0.0 "Duclair"
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Our fourth named release, focused on performance and features related to
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real-time encoding. It also fixes a decoder crash bug introduced in
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v0.9.7, so all users of that release are encouraged to upgrade.
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- Upgrading:
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This release is ABI incompatible with prior releases of libvpx, so the
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"major" version number has been bumped to 1. You must recompile your
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applications against the latest version of the libvpx headers. The
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API remains compatible, and this should not require code changes in most
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applications.
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- Enhancements:
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This release introduces several substantial new features to the encoder,
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of particular interest to real time streaming applications.
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Temporal scalability allows the encoder to produce a stream that can
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be decimated to different frame rates, with independent rate targetting
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for each substream.
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Multiframe quality enhancement postprocessing can make visual quality
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more consistent in the presence of frames that are substantially
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different quality than the surrounding frames, as in the temporal
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scalability case and in some forced keyframe scenarios.
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Multiple-resolution encoding support allows the encoding of the
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same content at different resolutions faster than encoding them
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separately.
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- Speed:
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Optimization targets for this release included the decoder and the real-
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time modes of the encoder. Decoder speed on x86 has improved 10.5% with
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this release. Encoder improvements followed a curve where speeds 1-3
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improved 4.0%-1.5%, speeds 4-8 improved <1%, and speeds 9-16 improved
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1.5% to 10.5%, respectively. "Best" mode speed is consistent with the
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Cayuga release.
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- Quality:
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Encoder quality in the single stream case is consistent with the Cayuga
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release.
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- Bug Fixes:
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This release fixes an OOB read decoder crash bug present in v0.9.7
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related to the clamping of motion vectors in SPLITMV blocks. This
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behavior could be triggered by corrupt input or by starting
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decoding from a P-frame.
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2011-08-15 v0.9.7-p1 "Cayuga" patch 1
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This is an incremental bugfix release against Cayuga. All users of that
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release are strongly encouraged to upgrade.
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- Fix potential OOB reads (cdae03a)
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An unbounded out of bounds read was discovered when the
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decoder was requested to perform error concealment (new in
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Cayuga) given a frame with corrupt partition sizes.
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A bounded out of bounds read was discovered affecting all
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versions of libvpx. Given an multipartition input frame that
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is truncated between the mode/mv partition and the first
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residiual paritition (in the block of partition offsets), up
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to 3 extra bytes could have been read from the source buffer.
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The code will not take any action regardless of the contents
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of these undefined bytes, as the truncated buffer is detected
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immediately following the read based on the calculated
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starting position of the coefficient partition.
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- Fix potential error concealment crash when the very first frame
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is missing or corrupt (a609be5)
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- Fix significant artifacts in error concealment (a4c2211, 99d870a)
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- Revert 1-pass CBR rate control changes (e961317)
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Further testing showed this change produced undesirable visual
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artifacts, rolling back for now.
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2011-08-02 v0.9.7 "Cayuga"
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Our third named release, focused on a faster, higher quality, encoder.
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- Upgrading:
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This release is backwards compatible with Aylesbury (v0.9.5) and
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Bali (v0.9.6). Users of older releases should refer to the Upgrading
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notes in this document for that release.
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- Enhancements:
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Stereo 3D format support for vpxenc
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Runtime detection of available processor cores.
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Allow specifying --end-usage by enum name
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vpxdec: test for frame corruption
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vpxenc: add quantizer histogram display
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vpxenc: add rate histogram display
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Set VPX_FRAME_IS_DROPPABLE
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update configure for ios sdk 4.3
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Avoid text relocations in ARM vp8 decoder
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Generate a vpx.pc file for pkg-config.
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New ways of passing encoded data between encoder and decoder.
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- Speed:
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This release includes across-the-board speed improvements to the
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encoder. On x86, these measure at approximately 11.5% in Best mode,
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21.5% in Good mode (speed 0), and 22.5% in Realtime mode (speed 6).
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On ARM Cortex A9 with Neon extensions, real-time encoding of video
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telephony content is 35% faster than Bali on single core and 48%
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faster on multi-core. On the NVidia Tegra2 platform, real time
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encoding is 40% faster than Bali.
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Decoder speed was not a priority for this release, but improved
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approximately 8.4% on x86.
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Reduce motion vector search on alt-ref frame.
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Encoder loopfilter running in its own thread
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Reworked loopfilter to precalculate more parameters
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SSE2/SSSE3 optimizations for build_predictors_mbuv{,_s}().
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Make hor UV predict ~2x faster (73 vs 132 cycles) using SSSE3.
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Removed redundant checks
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Reduced structure sizes
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utilize preload in ARMv6 MC/LPF/Copy routines
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ARM optimized quantization, dfct, variance, subtract
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Increase chrow row alignment to 16 bytes.
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disable trellis optimization for first pass
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Write SSSE3 sub-pixel filter function
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Improve SSE2 half-pixel filter funtions
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Add vp8_sub_pixel_variance16x8_ssse3 function
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Reduce unnecessary distortion computation
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Use diamond search to replace full search
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Preload reference area in sub-pixel motion search (real-time mode)
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- Quality:
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This release focused primarily on one-pass use cases, including
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video conferencing. Low latency data rate control was significantly
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improved, improving streamability over bandwidth constrained links.
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Added support for error concealment, allowing frames to maintain
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visual quality in the presence of substantial packet loss.
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Add rc_max_intra_bitrate_pct control
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Limit size of initial keyframe in one-pass.
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Improve framerate adaptation
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Improved 1-pass CBR rate control
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Improved KF insertion after fades to still.
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Improved key frame detection.
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Improved activity masking (lower PSNR impact for same SSIM boost)
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Improved interaction between GF and ARFs
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Adding error-concealment to the decoder.
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Adding support for independent partitions
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Adjusted rate-distortion constants
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- Bug Fixes:
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Removed firstpass motion map
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Fix parallel make install
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Fix multithreaded encoding for 1 MB wide frame
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Fixed iwalsh_neon build problems with RVDS4.1
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Fix semaphore emulation, spin-wait intrinsics on Windows
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Fix build with xcode4 and simplify GLOBAL.
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Mark ARM asm objects as allowing a non-executable stack.
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Fix vpxenc encoding incorrect webm file header on big endian
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2011-03-07 v0.9.6 "Bali"
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Our second named release, focused on a faster, higher quality, encoder.
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- Upgrading:
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This release is backwards compatible with Aylesbury (v0.9.5). Users
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of older releases should refer to the Upgrading notes in this
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document for that release.
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- Enhancements:
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vpxenc --psnr shows a summary when encode completes
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--tune=ssim option to enable activity masking
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improved postproc visualizations for development
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updated support for Apple iOS to SDK 4.2
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query decoder to determine which reference frames were updated
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implemented error tracking in the decoder
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fix pipe support on windows
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- Speed:
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Primary focus was on good quality mode, speed 0. Average improvement
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on x86 about 40%, up to 100% on user-generated content at that speed.
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Best quality mode speed improved 35%, and realtime speed 10-20%. This
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release also saw significant improvement in realtime encoding speed
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on ARM platforms.
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Improved encoder threading
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Dont pick encoder filter level when loopfilter is disabled.
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Avoid double copying of key frames into alt and golden buffer
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FDCT optimizations.
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x86 sse2 temporal filter
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SSSE3 version of fast quantizer
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vp8_rd_pick_best_mbsegmentation code restructure
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Adjusted breakout RD for SPLITMV
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Changed segmentation check order
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Improved rd_pick_intra4x4block
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Adds armv6 optimized variance calculation
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ARMv6 optimized sad16x16
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ARMv6 optimized half pixel variance calculations
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Full search SAD function optimization in SSE4.1
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Improve MV prediction accuracy to achieve performance gain
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Improve MV prediction in vp8_pick_inter_mode() for speed>3
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- Quality:
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Best quality mode improved PSNR 6.3%, and SSIM 6.1%. This release
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also includes support for "activity masking," which greatly improves
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SSIM at the expense of PSNR. For now, this feature is available with
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the --tune=ssim option. Further experimentation in this area
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is ongoing. This release also introduces a new rate control mode
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called "CQ," which changes the allocation of bits within a clip to
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the sections where they will have the most visual impact.
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Tuning for the more exact quantizer.
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Relax rate control for last few frames
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CQ Mode
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Limit key frame quantizer for forced key frames.
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KF/GF Pulsing
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Add simple version of activity masking.
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make rdmult adaptive for intra in quantizer RDO
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cap the best quantizer for 2nd order DC
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change the threshold of DC check for encode breakout
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- Bug Fixes:
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Fix crash on Sparc Solaris.
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Fix counter of fixed keyframe distance
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ARNR filter pointer update bug fix
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Fixed use of motion percentage in KF/GF group calc
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Changed condition for using RD in Intra Mode
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Fix encoder real-time only configuration.
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Fix ARM encoder crash with multiple token partitions
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Fixed bug first cluster timecode of webm file is wrong.
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Fixed various encoder bugs with odd-sized images
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vp8e_get_preview fixed when spatial resampling enabled
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quantizer: fix assertion in fast quantizer path
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Allocate source buffers to be multiples of 16
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Fix for manual Golden frame frequency
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Fix drastic undershoot in long form content
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2010-10-28 v0.9.5 "Aylesbury"
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Our first named release, focused on a faster decoder, and a better encoder.
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- Upgrading:
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This release incorporates backwards-incompatible changes to the
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ivfenc and ivfdec tools. These tools are now called vpxenc and vpxdec.
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vpxdec
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* the -q (quiet) option has been removed, and replaced with
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-v (verbose). the output is quiet by default. Use -v to see
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the version number of the binary.
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* The default behavior is now to write output to a single file
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instead of individual frames. The -y option has been removed.
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Y4M output is the default.
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* For raw I420/YV12 output instead of Y4M, the --i420 or --yv12
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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
|
|
Improved multithreaded performance
|
|
Improved Force Key Frame Behaviour
|
|
Increased rate control buffer level precision
|
|
Fix bug in 1st pass motion compensation
|
|
ivfenc: correct fixed kf interval, --disable-kf
|
|
- Speed:
|
|
Changed above and left context data layout
|
|
Rework idct calling structure.
|
|
Removed unnecessary MB_MODE_INFO copies
|
|
x86: SSSE3 sixtap prediction
|
|
Reworked IDCT to include reconstruction (add) step
|
|
Swap alt/gold/new/last frame buffer ptrs instead of copying.
|
|
Improve SSE2 loopfilter functions
|
|
Change bitreader to use a larger window.
|
|
Avoid loopfilter reinitialization when possible
|
|
- Quality:
|
|
Normalize quantizer's zero bin and rounding factors
|
|
Add trellis quantization.
|
|
Make the quantizer exact.
|
|
Updates to ARNR filtering algorithm
|
|
Fix breakout thresh computation for golden & AltRef frames
|
|
Redo the forward 4x4 dct
|
|
Improve the accuracy of forward walsh-hadamard transform
|
|
Further adjustment of RD behaviour with Q and Zbin.
|
|
- Build System:
|
|
Allow linking of libs built with MinGW to MSVC
|
|
Fix target auto-detection on mingw32
|
|
Allow --cpu= to work for x86.
|
|
configure: pass original arguments through to make dist
|
|
Fix builds without runtime CPU detection
|
|
msvs: fix install of codec sources
|
|
msvs: Change devenv.com command line for better msys support
|
|
msvs: Add vs9 targets.
|
|
Add x86_64-linux-icc target
|
|
- Bugs:
|
|
Potential crashes on older MinGW builds
|
|
Fix two-pass framrate for Y4M input.
|
|
Fixed simple loop filter, other crashes on ARM v6
|
|
arm: fix missing dependency with --enable-shared
|
|
configure: support directories containing .o
|
|
Replace pinsrw (SSE) with MMX instructions
|
|
apple: include proper mach primatives
|
|
Fixed rate control bug with long key frame interval.
|
|
Fix DSO link errors on x86-64 when not using a version script
|
|
Fixed buffer selection for UV in AltRef filtering
|
|
|
|
|
|
2010-06-17 v0.9.1
|
|
- Enhancements:
|
|
* ivfenc/ivfdec now support YUV4MPEG2 input and pipe I/O
|
|
* Speed optimizations
|
|
- Bugfixes:
|
|
* Rate control
|
|
* Prevent out-of-bounds accesses on invalid data
|
|
- Build system updates:
|
|
* Detect toolchain to be used automatically for native builds
|
|
* Support building shared libraries
|
|
* Better autotools emulation (--prefix, --libdir, DESTDIR)
|
|
- Updated LICENSE
|
|
* http://webmproject.blogspot.com/2010/06/changes-to-webm-open-source-license.html
|
|
|
|
|
|
2010-05-18 v0.9.0
|
|
- Initial open source release. Welcome to WebM and VP8!
|
|
|