![](http://www.ctiforum.com/uploadfile/2021/0413/20210413013544312.jpg)
据悉,WebRTC 发布了M90版本,而FFmpeg也紧随其后在4 月8日发布以“Rao”为代号的FFmpeg 4.4版本。
WebRTC M90版本发布
据了解,WebRTC M90目前可以在Chrome的测试版中使用,其中包含2个新功能和超过29个bug修复,对增强功能、稳定性与性能方面都有所改进。其中重点更新的地方在于Chrome M90增加了AV1的RTC编码器支持。
本次发布的WebRTC M90包含以下2个新功能:
1. MediaStreamTrack Insetable Streams Origin Trial
该功能是对MediaStream和Webcodecs API的扩展,允许应用程序:
1)访问包含在MediaStreamTrack中的原始数据
2)定义新的自定义MediaStreamTracks(了解更多关于WebRTC Insetable Stream可访问:https://zhuanlan.zhihu.com/p/360415322)
这两个功能可以组合使用,例如,创建媒体特效(如:“funny hats”)。该API依赖于WebCodecs原始媒体接口和WHATWG流API。这个特性是WebCodecs试用版的一部分。
2. getCurrentBrowsingContextMedia Origin Trial
这是一个用于捕获当前浏览器Tab内容的新的实验性API,目前正在开发中。
(关于该功能的更多信息可访问:
https://docs.google.com/document/d/1CIQH2ygvw7eTGO__Pcds_D46Gcn-iPAqESQqOsHHfkI/edit)
功能与Bug修复如下:
![](http://www.ctiforum.com/uploadfile/2021/0413/20210413013653230.jpg)
FFmpeg 4.4 “Rao”版本发布
距离FFmpeg 4.0版本已经过去了三年,相比四开头的其他版本,此次以代号为“Rao”的FFmpeg 4.4 版本是目前更新最多的一个,共81项。其官网上也提供了下载地址:https://ffmpeg.org/download.html#release_4.4
FFmpeg 4.4版本[重点]更新如下:
- AudioToolbox output device
- VDPAU accelerated HEVC 10/12bit decoding
- VDPAU accelerated VP9 10/12bit decoding
- AV1 decoder (Hardware acceleration used only)
- DXVA2/D3D11VA hardware accelerated AV1 decoding
- AV1 encoding support SVT-AV1
- AV1 Low overhead bitstream format demuxer
- AV1 monochrome encoding support via libaom >= 2.0.1
- Cineform HD encoder
- RPZA video encoder
- SpeedHQ encoder
- Microsoft Paint (MSP) version 2 decoder
- OpenEXR image encoder
- Dolby E parser
- RIST protocol via librist
FFmpeg 4.4版本全部更新如下:
- AudioToolbox output device
- MacCaption demuxer
- PGX decoder
- chromanr video filter
- VDPAU accelerated HEVC 10/12bit decoding
- ADPCM IMA Ubisoft APM encoder
- Rayman 2 APM muxer
- AV1 encoding support SVT-AV1
- Cineform HD encoder
- ADPCM Argonaut Games encoder
- Argonaut Games ASF muxer
- AV1 Low overhead bitstream format demuxer
- RPZA video encoder
- ADPCM IMA MOFLEX decoder
- MobiClip FastAudio decoder
- MobiClip video decoder
- MOFLEX demuxer
- MODS demuxer
- PhotoCD decoder
- MCA demuxer
- AV1 decoder (Hardware acceleration used only)
- SVS demuxer
- Argonaut Games BRP demuxer
- DAT demuxer
- aax demuxer
- IPU decoder, parser and demuxer
- Intel QSV-accelerated AV1 decoding
- Argonaut Games Video decoder
- ibwavpack encoder removed
- ACE demuxer
- AVS3 demuxer
- AVS3 video decoder via libuavs3d
- Cintel RAW decoder
- VDPAU accelerated VP9 10/12bit decoding
- afreqshift and aphaseshift filters
- High Voltage Software ADPCM encoder
- LEGO Racers ALP (.tun & .pcm) muxer
- AV1 VAAPI decoder
- adenorm filter
- ADPCM IMA AMV encoder
- AMV muxer
- NVDEC AV1 hwaccel
- DXVA2/D3D11VA hardware accelerated AV1 decoding
- speechnorm filter
- SpeedHQ encoder
- asupercut filter
- asubcut filter
- Microsoft Paint (MSP) version 2 decoder
- Microsoft Paint (MSP) demuxer
- AV1 monochrome encoding support via libaom >= 2.0.1
- asuperpass and asuperstop filter
- shufflepixels filter
- tmidequalizer filter
- estdif filter
- epx filter
- Dolby E parser
- shear filter
- kirsch filter
- colortemperature filter
- colorcontrast filter
- PFM encoder
- colorcorrect filter
- binka demuxer
- XBM parser
- xbm_pipe demuxer
- colorize filter
- CRI parser
- aexciter audio filter
- exposure video filter
- monochrome video filter
- setts bitstream filter
- vif video filter
- OpenEXR image encoder
- Simbiosis IMX decoder
- Simbiosis IMX demuxer
- Digital Pictures SGA demuxer and decoders
- TTML subtitle encoder and muxer
- identity video filter
- msad video filter
- gophers protocol