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CHANGELOG
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2024-05-21 v1.14.1 "Venetian Duck"
This release includes enhancements and bug fixes.
- Upgrading:
This release is ABI compatible with the previous release.
- Enhancement:
Improved the detection of compiler support for AArch64 extensions,
particularly SVE.
Added vpx_codec_get_global_headers() support for VP9.
- Bug fixes:
Added buffer bounds checks to vpx_writer and vpx_write_bit_buffer.
Fix to GetSegmentationData() crash in aq_mode=0 for RTC rate control.
Fix to alloc for row_base_thresh_freq_fac.
Free row mt memory before freeing cpi->tile_data.
Fix to buffer alloc for vp9_bitstream_worker_data.
Fix to VP8 race issue for multi-thread with pnsr_calc.
Fix to uv width/height in vp9_scale_and_extend_frame_ssse3.
Fix to integer division by zero and overflow in calc_pframe_target_size().
Fix to integer overflow in vpx_img_alloc() & vpx_img_wrap()(CVE-2024-5197).
Fix to UBSan error in vp9_rc_update_framerate().
Fix to UBSan errors in vp8_new_framerate().
Fix to integer overflow in vp8 encodeframe.c.
Handle EINTR from sem_wait().
2024-01-02 v1.14.0 "Venetian Duck"
This release drops support for old C compilers, such as Visual Studio 2012
and older, that disallow mixing variable declarations and statements (a C99
feature). It adds support for run-time CPU feature detection for Arm
platforms, as well as support for darwin23 (macOS 14).
- Upgrading:
This release is ABI incompatible with the previous release.
Various new features for rate control library for real-time: SVC parallel
encoding, loopfilter level, support for frame dropping, and screen content.
New callback function send_tpl_gop_stats for vp9 external rate control
library, which can be used to transmit TPL stats for a group of pictures. A
public header vpx_tpl.h is added for the definition of TPL stats used in
this callback.
libwebm is upgraded to libwebm-1.0.0.29-9-g1930e3c.
- Enhancement:
Improvements on Neon optimizations: VoD: 12-35% speed up for bitdepth 8,
68%-151% speed up for high bitdepth.
Improvements on AVX2 and SSE optimizations.
Improvements on LSX optimizations for LoongArch.
42-49% speedup on speed 0 VoD encoding.
Android API level predicates.
- Bug fixes:
Fix to missing prototypes from the rtcd header.
Fix to segfault when total size is enlarged but width is smaller.
Fix to the build for arm64ec using MSVC.
Fix to copy BLOCK_8X8's mi to PICK_MODE_CONTEXT::mic.
Fix to -Wshadow warnings.
Fix to heap overflow in vpx_get4x4sse_cs_neon.
Fix to buffer overrun in highbd Neon subpel variance filters.
Added bitexact encode test script.
Fix to -Wl,-z,defs with Clang's sanitizers.
Fix to decoder stability after error & continued decoding.
Fix to mismatch of VP9 encode with NEON intrinsics with C only version.
Fix to Arm64 MSVC compile vpx_highbd_fdct4x4_neon.
Fix to fragments count before use.
Fix to a case where target bandwidth is 0 for SVC.
Fix mask in vp9_quantize_avx2,highbd_get_max_lane_eob.
Fix to int overflow in vp9_calc_pframe_target_size_one_pass_cbr.
Fix to integer overflow in vp8,ratectrl.c.
Fix to integer overflow in vp9 svc.
Fix to avg_frame_bandwidth overflow.
Fix to per frame qp for temporal layers.
Fix to unsigned integer overflow in sse computation.
Fix to uninitialized mesh feature for BEST mode.
Fix to overflow in highbd temporal_filter.
Fix to unaligned loads w/w==4 in vpx_convolve_copy_neon.
Skip arm64_neon.h workaround w/VS >= 2019.
Fix to c vs avx mismatch of diamond_search_sad().
Fix to c vs intrinsic mismatch of vpx_hadamard_32x32() function.
Fix to a bug in vpx_hadamard_32x32_neon().
Fix to Clang -Wunreachable-code-aggressive warnings.
Fix to a bug in vpx_highbd_hadamard_32x32_neon().
Fix to -Wunreachable-code in mfqe_partition.
Force mode search on 64x64 if no mode is selected.
Fix to ubsan failure caused by left shift of negative.
Fix to integer overflow in calc_pframe_target_size.
Fix to float-cast-overflow in vp8_change_config().
Fix to a null ptr before use.
Conditionally skip using inter frames in speed features.
Remove invalid reference frames.
Disable intra mode search speed features conditionally.
Set nonrd keyframe under dynamic change of deadline for rtc.
Fix to scaled reference offsets.
Set skip_recode=0 in nonrd_pick_sb_modes.
Fix to an edge case when downsizing to one.
Fix to a bug in frame scaling.
Fix to pred buffer stride.
Fix to a bug in simple motion search.
Update frame size in actual encoding.
2023-09-29 v1.13.1 "Ugly Duckling"
This release contains two security related fixes. One each for VP8 and VP9.
- Upgrading:
This release is ABI compatible with the previous release.
- Bug fixes:
https://crbug.com/1486441 (CVE-2023-5217)
Fix to a crash related to VP9 encoding (#1642, CVE-2023-6349)
2023-01-31 v1.13.0 "Ugly Duckling"
This release includes more Neon and AVX2 optimizations, adds a new codec
control to set per frame QP, upgrades GoogleTest to v1.12.1, and includes
numerous bug fixes.
- Upgrading:
This release is ABI incompatible with the previous release.
New codec control VP9E_SET_QUANTIZER_ONE_PASS to set per frame QP.
GoogleTest is upgraded to v1.12.1.
.clang-format is upgraded to clang-format-11.
VPX_EXT_RATECTRL_ABI_VERSION was bumped due to incompatible changes to the
feature of using external rate control models for vp9.
- Enhancement:
Numerous improvements on Neon optimizations.
Numerous improvements on AVX2 optimizations.
Additional ARM targets added for Visual Studio.
- Bug fixes:
Fix to calculating internal stats when frame dropped.
Fix to segfault for external resize test in vp9.
Fix to build system with replacing egrep with grep -E.
Fix to a few bugs with external RTC rate control library.
Fix to make SVC work with VBR.
Fix to key frame setting in VP9 external RC.
Fix to -Wimplicit-int (Clang 16).
Fix to VP8 external RC for buffer levels.
Fix to VP8 external RC for dynamic update of layers.
Fix to VP9 auto level.
Fix to off-by-one error of max w/h in validate_config.
Fix to make SVC work for Profile 1.
2022-06-17 v1.12.0 "Torrent Duck"
This release adds optimizations for Loongarch, adds support for vp8 in the
real-time rate control library, upgrades GoogleTest to v1.11.0, updates
libwebm to libwebm-1.0.0.28-20-g206d268, and includes numerous bug fixes.
- Upgrading:
This release is ABI compatible with the previous release.
vp8 support in the real-time rate control library.
New codec control VP8E_SET_RTC_EXTERNAL_RATECTRL is added.
Configure support for darwin21 is added.
GoogleTest is upgraded to v1.11.0.
libwebm is updated to libwebm-1.0.0.28-20-g206d268.
Allow SimpleEncode environment to take target level as input to match
the level conformance in vp9.
- Enhancement:
Numerous improvements on checking memory allocations.
Optimizations for Loongarch.
Code clean-up.
- Bug fixes:
Fix to a crash related to {vp8/vp9}_set_roi_map.
Fix to compiling failure with -Wformat-nonliteral.
Fix to integer overflow with vp9 with high resolution content.
Fix to AddNoiseTest failure with ARMv7.
Fix to libvpx Null-dereference READ in vp8.
2021-09-27 v1.11.0 "Smew Duck"
This maintenance release adds support for VBR mode in VP9 rate control
interface, new codec controls to get quantization parameters and loop filter
levels, and includes several improvements to NEON and numerous bug fixes.
- Upgrading:
This release is ABI incompatible with the previous release.
New codec control is added to get quantization parameters and loop filter
levels.
VBR mode is supported in VP9 rate control library.
- Enhancement:
Numerous improvements for Neon optimizations.
Code clean-up and refactoring.
Calculation of rd multiplier is changed with BDRATE gains.
- Bug fixes:
Fix to overflow on duration.
Fix to several instances of -Wunused-but-set-variable.
Fix to avoid chroma resampling for 420mpeg2 input.
Fix to overflow in calc_iframe_target_size.
Fix to disallow skipping transform and quantization.
Fix some -Wsign-compare warnings in simple_encode.
Fix input file path in simple_encode_test.
Fix valid range for under/over_shoot pct.
2021-03-09 v1.10.0 "Ruddy Duck"
This maintenance release adds support for darwin20 and new codec controls, as
well as numerous bug fixes.
- Upgrading:
This release is ABI incompatible with the previous release.
New codec control is added to disable loopfilter for VP9.
New encoder control is added to disable feature to increase Q on overshoot
detection for CBR.
Configure support for darwin20 is added.
New codec control is added for VP9 rate control. The control ID of this
interface is VP9E_SET_EXTERNAL_RATE_CONTROL. To make VP9 use a customized
external rate control model, users will have to implement each callback
function in vpx_rc_funcs_t and register them using libvpx API
vpx_codec_control_() with the control ID.
- Enhancement:
Use -std=gnu++11 instead of -std=c++11 for c++ files.
- Bug fixes:
Override assembler with --as option of configure for MSVS.
Fix several compilation issues with gcc 4.8.5.
Fix to resetting rate control for temporal layers.
Fix to the rate control stats of SVC example encoder when number of spatial
layers is 1.
Fix to reusing motion vectors from the base spatial layer in SVC.
2 pass related flags removed from SVC example encoder.
2020-07-29 v1.9.0 "Quacking Duck"
This release adds support for NV12, a separate library for rate control, as
well as incremental improvements.
- Upgrading:
This release is ABI compatible with the previous release.
NV12 support is added to this release.
A new interface is added for VP9 rate control. The new library libvp9rc.a
must be linked by applications.
Googletest is updated to v1.10.0.
simple_encode.cc is compiled into a new library libsimple_encode.a with
CONFIG_RATE_CTRL.
- Enhancement:
Various changes to improve VP9 SVC, rate control, quality and speed to real
time encoding.
- Bug fixes:
Fix key frame update refresh simulcast flexible svc.
Fix to disable_16x16part speed feature for real time encoding.
Fix some signed integer overflows for VP9 rate control.
Fix initialization of delta_q_uv.
Fix condition in regulate_q for cyclic refresh.
Various fixes to dynamic resizing for VP9 SVC.
2019-12-09 v1.8.2 "Pekin Duck"
This release collects incremental improvements to many aspects of the library.
- Upgrading:
This release is ABI compatible with the previous release.
ARCH_* defines have been removed in favor of VPX_ARCH_*.
2019-07-15 v1.8.1 "Orpington Duck"
This release collects incremental improvements to many aspects of the library.
- Upgrading:
This release is ABI incompatible with the previous release.
VP8E_SET_CPUUSED now accepts values up to 9 for vp9.
VPX_CTRL_VP9E_SET_MAX_INTER_BITRATE_PCT had a spelling fix (was VP8E).
The --sdk-path option has been removed. If you were using it to build for
Android please read build/make/Android.mk for alternatives.
All PPC optimizations have been disabled:
https://bugs.chromium.org/p/webm/issues/detail?id=1522.
- Enhancements:
Various changes to improve encoder rate control, quality and speed
for practically every use case.
- Bug fixes:
vp9-rtc: Fix color artifacts for speed >= 8.
2019-01-31 v1.8.0 "Northern Shoveler Duck"
This release focused on encoding performance for realtime and VOD use cases.
- Upgrading:
This release is ABI incompatible with the previous release. This adds and
improves several vp9 controls. Most are related to SVC:
VP9E_SET_SVC_FRAME_DROP_LAYER:
- Frame dropping in SVC.
VP9E_SET_SVC_INTER_LAYER_PRED:
- Inter-layer prediction in SVC.
VP9E_SET_SVC_GF_TEMPORAL_REF:
- Enable long term temporal reference in SVC.
VP9E_SET_SVC_REF_FRAME_CONFIG/VP9E_GET_SVC_REF_FRAME_CONFIG:
- Extend and improve this control for better flexibility in setting SVC
pattern dynamically.
VP9E_SET_POSTENCODE_DROP:
- Allow for post-encode frame dropping (applies to non-SVC too).
VP9E_SET_SVC_SPATIAL_LAYER_SYNC:
- Enable spatial layer sync frames.
VP9E_SET_SVC_LAYER_ID:
- Extend api to specify temporal id for each spatial layers.
VP9E_SET_ROI_MAP:
- Extend Region of Interest functionality to VP9.
- Enhancements:
2 pass vp9 encoding has improved substantially. When using --auto-alt-ref=6,
we see approximately 8% for VBR and 10% for CQ. When using --auto-alt-ref=1,
the gains are approximately 4% for VBR and 5% for CQ.
For real-time encoding, speed 7 has improved by ~5-10%. Encodes targeted at
screen sharing have improved when the content changes significantly (slide
sharing) or scrolls. There is a new speed 9 setting for mobile devices which
is about 10-20% faster than speed 8.
- Bug fixes:
VP9 denoiser issue.
VP9 partition issue for 1080p.
VP9 rate control improvments.
Postprocessing Multi Frame Quality Enhancement (MFQE) issue.
VP8 multithread decoder issues.
A variety of fuzzing issues.
2018-01-04 v1.7.0 "Mandarin Duck"
This release focused on high bit depth performance (10/12 bit) and vp9
encoding improvements.
- Upgrading:
This release is ABI incompatible due to new vp9 encoder features.
Frame parallel decoding for vp9 has been removed.
- Enhancements:
vp9 encoding supports additional threads with --row-mt. This can be greater
than the number of tiles.
Two new vp9 encoder options have been added:
--corpus-complexity
--tune-content=film
Additional tooling for respecting the vp9 "level" profiles has been added.
- Bug fixes:
A variety of fuzzing issues.
vp8 threading fix for ARM.
Codec control VP9_SET_SKIP_LOOP_FILTER fixed.
Reject invalid multi resolution configurations.
2017-01-09 v1.6.1 "Long Tailed Duck"
This release improves upon the VP9 encoder and speeds up the encoding and
decoding processes.
- Upgrading:
This release is ABI compatible with 1.6.0.
- Enhancements:
Faster VP9 encoding and decoding.
High bit depth builds now provide similar speed for 8 bit encode and decode
for x86 targets. Other platforms and higher bit depth improvements are in
progress.
- Bug Fixes:
A variety of fuzzing issues.
2016-07-20 v1.6.0 "Khaki Campbell Duck"
This release improves upon the VP9 encoder and speeds up the encoding and
decoding processes.
- Upgrading:
This release is ABI incompatible with 1.5.0 due to a new 'color_range' enum
in vpx_image and some minor changes to the VP8_COMP structure.
The default key frame interval for VP9 has changed from 128 to 9999.
- Enhancement:
A core focus has been performance for low end Intel processors. SSSE3
instructions such as 'pshufb' have been avoided and instructions have been
reordered to better accommodate the more constrained pipelines.
As a result, devices based on Celeron processors have seen substantial
decoding improvements. From Indian Runner Duck to Javan Whistling Duck,
decoding speed improved between 10 and 30%. Between Javan Whistling Duck
and Khaki Campbell Duck, it improved another 10 to 15%.
While Celeron benefited most, Core-i5 also improved 5% and 10% between the
respective releases.
Realtime performance for WebRTC for both speed and quality has received a
lot of attention.
- Bug Fixes:
A number of fuzzing issues, found variously by Mozilla, Chromium and others,
have been fixed and we strongly recommend updating.
2015-11-09 v1.5.0 "Javan Whistling Duck"
This release improves upon the VP9 encoder and speeds up the encoding and
decoding processes.
- Upgrading:
This release is ABI incompatible with 1.4.0. It drops deprecated VP8
controls and adds a variety of VP9 controls for testing.
The vpxenc utility now prefers VP9 by default.
- Enhancements:
Faster VP9 encoding and decoding
Smaller library size by combining functions used by VP8 and VP9
- Bug Fixes:
A variety of fuzzing issues
2015-04-03 v1.4.0 "Indian Runner Duck"
This release includes significant improvements to the VP9 codec.
- Upgrading:
This release is ABI incompatible with 1.3.0. It drops the compatibility
layer, requiring VPX_IMG_FMT_* instead of IMG_FMT_*, and adds several codec
controls for VP9.
- Enhancements:
Faster VP9 encoding and decoding
Multithreaded VP9 decoding (tile and frame-based)
Multithreaded VP9 encoding - on by default
YUV 4:2:2 and 4:4:4 support in VP9
10 and 12bit support in VP9
64bit ARM support by replacing ARM assembly with intrinsics
- Bug Fixes:
Fixes a VP9 bitstream issue in Profile 1. This only affected non-YUV 4:2:0
files.
- Known Issues:
Frame Parallel decoding fails for segmented and non-420 files.
2013-11-15 v1.3.0 "Forest"
This release introduces the VP9 codec in a backward-compatible way.
All existing users of VP8 can continue to use the library without
modification. However, some VP8 options do not map to VP9 in the same manner.
The VP9 encoder in this release is not feature complete. Users interested in
the encoder are advised to use the git master branch and discuss issues on
libvpx mailing lists.
- Upgrading:
This release is ABI and API compatible with Duclair (v1.0.0). Users
of older releases should refer to the Upgrading notes in this document
for that release.
- Enhancements:
Get rid of bashisms in the main build scripts
Added usage info on command line options
Add lossless compression mode
Dll build of libvpx
Add additional Mac OS X targets: 10.7, 10.8 and 10.9 (darwin11-13)
Add option to disable documentation
configure: add --enable-external-build support
make: support V=1 as short form of verbose=yes
configure: support mingw-w64
configure: support hardfloat armv7 CHOSTS
configure: add support for android x86
Add estimated completion time to vpxenc
Don't exit on decode errors in vpxenc
vpxenc: support scaling prior to encoding
vpxdec: support scaling output
vpxenc: improve progress indicators with --skip
msvs: Don't link to winmm.lib
Add a new script for producing vcxproj files
Produce Visual Studio 10 and 11 project files
Produce Windows Phone project files
msvs-build: use msbuild for vs >= 2005
configure: default configure log to config.log
Add encoding option --static-thresh
- Speed:
Miscellaneous speed optimizations for VP8 and VP9.
- Quality:
In general, quality is consistent with the Eider release.
- Bug Fixes:
This release represents approximately a year of engineering effort,
and contains multiple bug fixes. Please refer to git history for details.
2012-12-21 v1.2.0
This release acts as a checkpoint for a large amount of internal refactoring
and testing. It also contains a number of small bugfixes, so all users are
encouraged to upgrade.
- Upgrading:
This release is ABI and API compatible with Duclair (v1.0.0). Users
of older releases should refer to the Upgrading notes in this
document for that release.
- Enhancements:
VP8 optimizations for MIPS dspr2
vpxenc: add -quiet option
- Speed:
Encoder and decoder speed is consistent with the Eider release.
- Quality:
In general, quality is consistent with the Eider release.
Minor tweaks to ARNR filtering
Minor improvements to real time encoding with multiple temporal layers
- Bug Fixes:
Fixes multithreaded encoder race condition in loopfilter
Fixes multi-resolution threaded encoding
Fix potential encoder dead-lock after picture resize
2012-05-09 v1.1.0 "Eider"
This introduces a number of enhancements, mostly focused on real-time
encoding. In addition, it fixes a decoder bug (first introduced in
Duclair) so all users of that release are encouraged to upgrade.
- Upgrading:
This release is ABI and API compatible with Duclair (v1.0.0). Users
of older releases should refer to the Upgrading notes in this
document for that release.
This release introduces a new temporal denoiser, controlled by the
VP8E_SET_NOISE_SENSITIVITY control. The temporal denoiser does not
currently take a strength parameter, so the control is effectively
a boolean - zero (off) or non-zero (on). For compatibility with
existing applications, the values accepted are the same as those
for the spatial denoiser (0-6). The temporal denoiser is enabled
by default, and the older spatial denoiser may be restored by
configuring with --disable-temporal-denoising. The temporal denoiser
is more computationally intensive than the spatial one.
This release removes support for a legacy, decode only API that was
supported, but deprecated, at the initial release of libvpx
(v0.9.0). This is not expected to have any impact. If you are
impacted, you can apply a reversion to commit 2bf8fb58 locally.
Please update to the latest libvpx API if you are affected.
- Enhancements:
Adds a motion compensated temporal denoiser to the encoder, which
gives higher quality than the older spatial denoiser. (See above
for notes on upgrading).
In addition, support for new compilers and platforms were added,
including:
improved support for XCode
Android x86 NDK build
OS/2 support
SunCC support
Changing resolution with vpx_codec_enc_config_set() is now
supported. Previously, reinitializing the codec was required to
change the input resolution.
The vpxenc application has initial support for producing multiple
encodes from the same input in one call. Resizing is not yet
supported, but varying other codec parameters is. Use -- to
delineate output streams. Options persist from one stream to the
next.
Also, the vpxenc application will now use a keyframe interval of
5 seconds by default. Use the --kf-max-dist option to override.
- Speed:
Decoder performance improved 2.5% versus Duclair. Encoder speed is
consistent with Duclair for most material. Two pass encoding of
slideshow-like material will see significant improvements.
Large realtime encoding speed gains at a small quality expense are
possible by configuring the on-the-fly bitpacking experiment with
--enable-onthefly-bitpacking. Realtime encoder can be up to 13%
faster (ARM) depending on the number of threads and bitrate
settings. This technique sees constant gain over the 5-16 speed
range. For VC style input the loss seen is up to 0.2dB. See commit
52cf4dca for further details.
- Quality:
On the whole, quality is consistent with the Duclair release. Some
tweaks:
Reduced blockiness in easy sections by applying a penalty to
intra modes.
Improved quality of static sections (like slideshows) with
two pass encoding.
Improved keyframe sizing with multiple temporal layers
- Bug Fixes:
Corrected alt-ref contribution to frame rate for visible updates
to the alt-ref buffer. This affected applications making manual
usage of the frame reference flags, or temporal layers.
Additional constraints were added to disable multi-frame quality
enhancement (MFQE) in sections of the frame where there is motion.
(#392)
Fixed corruption issues when vpx_codec_enc_config_set() was called
with spatial resampling enabled.
Fixed a decoder error introduced in Duclair where the segmentation
map was not being reinitialized on keyframes (#378)
2012-01-27 v1.0.0 "Duclair"
Our fourth named release, focused on performance and features related to
real-time encoding. It also fixes a decoder crash bug introduced in
v0.9.7, so all users of that release are encouraged to upgrade.
- Upgrading:
This release is ABI incompatible with prior releases of libvpx, so the
"major" version number has been bumped to 1. You must recompile your
applications against the latest version of the libvpx headers. The
API remains compatible, and this should not require code changes in most
applications.
- Enhancements:
This release introduces several substantial new features to the encoder,
of particular interest to real time streaming applications.
Temporal scalability allows the encoder to produce a stream that can
be decimated to different frame rates, with independent rate targeting
for each substream.
Multiframe quality enhancement postprocessing can make visual quality
more consistent in the presence of frames that are substantially
different quality than the surrounding frames, as in the temporal
scalability case and in some forced keyframe scenarios.
Multiple-resolution encoding support allows the encoding of the
same content at different resolutions faster than encoding them
separately.
- Speed:
Optimization targets for this release included the decoder and the real-
time modes of the encoder. Decoder speed on x86 has improved 10.5% with
this release. Encoder improvements followed a curve where speeds 1-3
improved 4.0%-1.5%, speeds 4-8 improved <1%, and speeds 9-16 improved
1.5% to 10.5%, respectively. "Best" mode speed is consistent with the
Cayuga release.
- Quality:
Encoder quality in the single stream case is consistent with the Cayuga
release.
- Bug Fixes:
This release fixes an OOB read decoder crash bug present in v0.9.7
related to the clamping of motion vectors in SPLITMV blocks. This
behavior could be triggered by corrupt input or by starting
decoding from a P-frame.
2011-08-15 v0.9.7-p1 "Cayuga" patch 1
This is an incremental bugfix release against Cayuga. All users of that
release are strongly encouraged to upgrade.
- Fix potential OOB reads (cdae03a)
An unbounded out of bounds read was discovered when the
decoder was requested to perform error concealment (new in
Cayuga) given a frame with corrupt partition sizes.
A bounded out of bounds read was discovered affecting all
versions of libvpx. Given an multipartition input frame that
is truncated between the mode/mv partition and the first
residiual paritition (in the block of partition offsets), up
to 3 extra bytes could have been read from the source buffer.
The code will not take any action regardless of the contents
of these undefined bytes, as the truncated buffer is detected
immediately following the read based on the calculated
starting position of the coefficient partition.
- Fix potential error concealment crash when the very first frame
is missing or corrupt (a609be5)
- Fix significant artifacts in error concealment (a4c2211, 99d870a)
- Revert 1-pass CBR rate control changes (e961317)
Further testing showed this change produced undesirable visual
artifacts, rolling back for now.
2011-08-02 v0.9.7 "Cayuga"
Our third named release, focused on a faster, higher quality, encoder.
- Upgrading:
This release is backwards compatible with Aylesbury (v0.9.5) and
Bali (v0.9.6). Users of older releases should refer to the Upgrading
notes in this document for that release.
- Enhancements:
Stereo 3D format support for vpxenc
Runtime detection of available processor cores.
Allow specifying --end-usage by enum name
vpxdec: test for frame corruption
vpxenc: add quantizer histogram display
vpxenc: add rate histogram display
Set VPX_FRAME_IS_DROPPABLE
update configure for ios sdk 4.3
Avoid text relocations in ARM vp8 decoder
Generate a vpx.pc file for pkg-config.
New ways of passing encoded data between encoder and decoder.
- Speed:
This release includes across-the-board speed improvements to the
encoder. On x86, these measure at approximately 11.5% in Best mode,
21.5% in Good mode (speed 0), and 22.5% in Realtime mode (speed 6).
On ARM Cortex A9 with Neon extensions, real-time encoding of video
telephony content is 35% faster than Bali on single core and 48%
faster on multi-core. On the NVidia Tegra2 platform, real time
encoding is 40% faster than Bali.
Decoder speed was not a priority for this release, but improved
approximately 8.4% on x86.
Reduce motion vector search on alt-ref frame.
Encoder loopfilter running in its own thread
Reworked loopfilter to precalculate more parameters
SSE2/SSSE3 optimizations for build_predictors_mbuv{,_s}().
Make hor UV predict ~2x faster (73 vs 132 cycles) using SSSE3.
Removed redundant checks
Reduced structure sizes
utilize preload in ARMv6 MC/LPF/Copy routines
ARM optimized quantization, dfct, variance, subtract
Increase chrow row alignment to 16 bytes.
disable trellis optimization for first pass
Write SSSE3 sub-pixel filter function
Improve SSE2 half-pixel filter funtions
Add vp8_sub_pixel_variance16x8_ssse3 function
Reduce unnecessary distortion computation
Use diamond search to replace full search
Preload reference area in sub-pixel motion search (real-time mode)
- Quality:
This release focused primarily on one-pass use cases, including
video conferencing. Low latency data rate control was significantly
improved, improving streamability over bandwidth constrained links.
Added support for error concealment, allowing frames to maintain
visual quality in the presence of substantial packet loss.
Add rc_max_intra_bitrate_pct control
Limit size of initial keyframe in one-pass.
Improve framerate adaptation
Improved 1-pass CBR rate control
Improved KF insertion after fades to still.
Improved key frame detection.
Improved activity masking (lower PSNR impact for same SSIM boost)
Improved interaction between GF and ARFs
Adding error-concealment to the decoder.
Adding support for independent partitions
Adjusted rate-distortion constants
- Bug Fixes:
Removed firstpass motion map
Fix parallel make install
Fix multithreaded encoding for 1 MB wide frame
Fixed iwalsh_neon build problems with RVDS4.1
Fix semaphore emulation, spin-wait intrinsics on Windows
Fix build with xcode4 and simplify GLOBAL.
Mark ARM asm objects as allowing a non-executable stack.
Fix vpxenc encoding incorrect webm file header on big endian
2011-03-07 v0.9.6 "Bali"
Our second named release, focused on a faster, higher quality, encoder.
- Upgrading:
This release is backwards compatible with Aylesbury (v0.9.5). Users
of older releases should refer to the Upgrading notes in this
document for that release.
- Enhancements:
vpxenc --psnr shows a summary when encode completes
--tune=ssim option to enable activity masking
improved postproc visualizations for development
updated support for Apple iOS to SDK 4.2
query decoder to determine which reference frames were updated
implemented error tracking in the decoder
fix pipe support on windows
- Speed:
Primary focus was on good quality mode, speed 0. Average improvement
on x86 about 40%, up to 100% on user-generated content at that speed.
Best quality mode speed improved 35%, and realtime speed 10-20%. This
release also saw significant improvement in realtime encoding speed
on ARM platforms.
Improved encoder threading
Dont pick encoder filter level when loopfilter is disabled.
Avoid double copying of key frames into alt and golden buffer
FDCT optimizations.
x86 sse2 temporal filter
SSSE3 version of fast quantizer
vp8_rd_pick_best_mbsegmentation code restructure
Adjusted breakout RD for SPLITMV
Changed segmentation check order
Improved rd_pick_intra4x4block
Adds armv6 optimized variance calculation
ARMv6 optimized sad16x16
ARMv6 optimized half pixel variance calculations
Full search SAD function optimization in SSE4.1
Improve MV prediction accuracy to achieve performance gain
Improve MV prediction in vp8_pick_inter_mode() for speed>3
- Quality:
Best quality mode improved PSNR 6.3%, and SSIM 6.1%. This release
also includes support for "activity masking," which greatly improves
SSIM at the expense of PSNR. For now, this feature is available with
the --tune=ssim option. Further experimentation in this area
is ongoing. This release also introduces a new rate control mode
called "CQ," which changes the allocation of bits within a clip to
the sections where they will have the most visual impact.
Tuning for the more exact quantizer.
Relax rate control for last few frames
CQ Mode
Limit key frame quantizer for forced key frames.
KF/GF Pulsing
Add simple version of activity masking.
make rdmult adaptive for intra in quantizer RDO
cap the best quantizer for 2nd order DC
change the threshold of DC check for encode breakout
- Bug Fixes:
Fix crash on Sparc Solaris.
Fix counter of fixed keyframe distance
ARNR filter pointer update bug fix
Fixed use of motion percentage in KF/GF group calc
Changed condition for using RD in Intra Mode
Fix encoder real-time only configuration.
Fix ARM encoder crash with multiple token partitions
Fixed bug first cluster timecode of webm file is wrong.
Fixed various encoder bugs with odd-sized images
vp8e_get_preview fixed when spatial resampling enabled
quantizer: fix assertion in fast quantizer path
Allocate source buffers to be multiples of 16
Fix for manual Golden frame frequency
Fix drastic undershoot in long form content
2010-10-28 v0.9.5 "Aylesbury"
Our first named release, focused on a faster decoder, and a better encoder.
- Upgrading:
This release incorporates backwards-incompatible changes to the
ivfenc and ivfdec tools. These tools are now called vpxenc and vpxdec.
vpxdec
* the -q (quiet) option has been removed, and replaced with
-v (verbose). the output is quiet by default. Use -v to see
the version number of the binary.
* The default behavior is now to write output to a single file
instead of individual frames. The -y option has been removed.
Y4M output is the default.
* For raw I420/YV12 output instead of Y4M, the --i420 or --yv12
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.