AVIF in Spectrum lib

While browsing for AV1/AVIF updates, I noticed this commit to Facebook’s open source Spectrum library that adds support for AVIF format.

Spectrum is an image transcoding library for iOS and Android that is meant to be integrated into apps for image operations. Hopefully this means that we’ll see apps supporting AVIF format soon!

FFmpeg 4.2 release

FFmpeg 4.2 codenamed “Ada” was released on August 5th, 2019. It brought with it support for AV1 decoding through libdav1d decoder. This should make it possible for applications which integrate FFmpeg to build in support for decoding AV1 files. For the full release notes visit the below link.

dav1d 0.4.0

In July, dav1d got it’s 4th major release codenamed “Cheetah”. Here are the changes included in this release

25% speedup on ARM64

Minor improvements on SSE and ARM

Major improvements to RAM usage (halving the RAM used in some cases!)

https://code.videolan.org/videolan/dav1d/-/tags/0.4.0

libaom seems to be coming along nicely with some fairly substantial improvements this month!

Convolutional Neural Networks Based Texture Modeling For AV1

The following research paper released in August discusses how using a different coding method for “perceptually insignificant” regions in the frame can lead to substantial data rate reductions while maintaining visual quality. Some of this research was presented by Dr. Zoe Liu in her “Aurora AV1 encoder” presentation at Big Apple Video conference 2019 back in June. I suspect these neural network based techniques are what allow the Aurora encoder to show so much promise at this early stage. The paper can be found at the link below.

Online AV1 converter

You an encoding format has gone mainstream when websites start popping online allowing you to upload any video and convert it to the format in question :). I found one such website last month. Enjoy!

https://convertio.co/av1-converter/

AV1 resources



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