Codecs

May was another amazing month for the AV1 codec! We saw great progress in the SVT-AV1 encoder, Android update news and some surprising news out of China! SVT-AV1 is making strides! Let’s start with SVT-AV1 encoder, the current encoder of choice for Netflix, being developed by the folks at Intel. In May, version 0.5.0 was released with the following features: 8 bit / 10 bit 4:2:0 up to 4K60p resolutions Presets 0-8 New API, FFmpeg, GStreamer plugins Rate control support (VBR, CVBR) Block sizes from 4x4 to 128x128 Non-square blocks Tiles Deblocking / CDEF / Restoration filters Film Grain Warped motion estimation Intra block copy Trellis quantized coefficient optimization Support for 4 and 5 layers prediction structures Chroma search in MD Multi-reference picture support Other notable updates May also saw the most number of commits to the SVT-AV1 Github repo as shown by the graph below. There were also 40 PRs merged in the month of May. ...

Bitstream spec https://aomediacodec.github.io/av1-spec/ Encoder Implementations SVT-AV1 Homepage https://01.org/svt Source repo https://github.com/OpenVisualCloud/SVT-AV1 User-Guide https://github.com/OpenVisualCloud/SVT-AV1/blob/master/Docs/svt-av1_encoder_user_guide.md Roadmap Trello page Microsoft Azure whitepaper https://01.org/sites/default/files/documentation/svt_azure_wp.pdf Amazon Web Services (AWS) Whitepaper http://01.org/sites/default/files/documentation/svt_aws_wp.pdf Mailing List http://lists.01.org/mailman/listinfo/svt-av1 aomenc Homepage and Source repo https://aomedia.googlesource.com/aom/ rav1e Homepage, Source repo https://github.com/xiph/rav1e Decoder Implementations dav1d Homepage, Source repo https://code.videolan.org/videolan/dav1d Presentations Mozilla @ NAB 2019 [April 2019 by Nathan Egge] AOM - AV1How does it work? [July 2017 by Pascal Massimino] Videos Video @Scale 2018 - Yue Chen, Google Yue Chen, Senior AV1 Engineer at Google, gives a technical overview of the AV1 video codec. ...

It’s been an exciting time following the progress of the royalty free video codec AV1 over the past year and April might just be the most exciting active month in the amount of news we got about AV1! It’s not every day that media industry giants such as Netflix, Google, Mozilla, Microsoft, Apple, Amazon, ARM, Facebook, Nvidia, Intel, Cisco and many others agree on the same technology stack! Samsung joins the party The month started with Samsung announcing they were joining the Alliance of Open Media Board at the highest level. ...

It is 2019 and we need to make a decision about GIFs (no, not that one! We’re never going to be able to decide that one!). GIFs take up a massive amount of space (often multiple megabytes!) and if you’re a web developer, then that’s completely against your ethos! As a web developer, you want to minimize the bits your users need to download so that your website loads fast. That’s why you minify javascript, optimize PNGs, JPEGs and sometimes turn JPEGs to WebPs as well. But then what about the venerable GIF? ...

Video encoding has always been a fairly compute intensive task. With every new generation of video encoders, more computational power has been required to achieve the compression benefits. HEVC/H.265 is the latest state of the art video compression standard with x265 being the most popular open-source encoder used for encoding into the HEVC/H.265 format. In comparison to AVC/H.264 (the previous state of the art encoding format), HEVC offers about double the data compression ratio at the same level of video quality, or substantially improved video quality at the same bit rate. ...