Alliance for Open Media codecs

[Mjpeg]

Originally Posted by EwoutH

AV1 is now quickly becoming mainstream, is it time for an separate Sub-Forum for AV1 (or AOM codecs in general)? I would love separate threads for aom, dav1d, rav1e, svt-av1, hardware acceleration and applications that support AV1.

My vote is it's too early for that. It's nice reading about the encoder and decoder stuff in one place for now. Or put another way .. at what average messages/day rate should it split Maybe 25? Where well short of that now.

[EwoutH]

I think the number of messages per day is now also limited because small things don't seem important enough for a combined thread. With split threads I would report way more often about small changes in dav1d performance, SVT-AV1's troubles with Open Source and rav1e and aom related news. Now it just doesn't seem important enough to report on in a general thread.

For example:

• Henrik Gramner just made some really interesting optimizations to dav1d's msac function in MR696 and MR697, resulting in about 1.5% faster performance on all x86-64 platforms. Martin Storsjö (wbs) is working on adding the same improvements with NEON for Arm64.
• dav1d just got a logo
• For benchmarking purposed, dav1d now can be run at fixed frame rates

• SVT-AV1 just reduced memory usage by 30 to 70 percent
• Someone is working on a decoder in SVT-AV1
• Some effort is made to get SVT-AV1's development process more transparant and compliant with open source practices in this issue

[soresu]

A thought I had, was to make splitting up the general thread easier, you could just take everything pre-bitstream freeze and label it as such.
Thats got to be a serious portion of the thread, and mostly about AV1 development?

[benwaggoner]

Originally Posted by EwoutH

AV1 is now quickly becoming mainstream, is it time for an separate Sub-Forum for AV1 (or AOM codecs in general)? I would love separate threads for aom, dav1d, rav1e, svt-av1, hardware acceleration and applications that support AV1.

Certainly tools and infrastructure are getting improved and deployed. But who actually has live content in AV1 other than YouTube?

[dapperdan]

Originally Posted by benwaggoner

But who actually has live content in AV1 other than YouTube?

Facebook appear to have it all hooked up to deploy AV1 since about a year ago, but whether they actually use it for anything other than testing yet I don't know.

Anyone use Facebook to watch popular videos? Do they have a "stats for nerds" equivalent?

[iwod]

Originally Posted by dapperdan

Facebook appear to have it all hooked up to deploy AV1 since about a year ago, but whether they actually use it for anything other than testing yet I don't know.

Anyone use Facebook to watch popular videos? Do they have a "stats for nerds" equivalent?

The likelihood is close to Zero. Although that is just a pure guess.

The latest report from Facebook shows 92% of its users are on Mobile Apps. That is up from 90% YoY and trending towards 100%. I doubt they would want to push AV1 for the sake of saving bandwidth ( even less than a rounding error for Facebook ) at the expense of user battery. ( Which will lower user engagement time, and lower ads revenue, everything Facebook is valued of )

[EwoutH]

SVT-AV1 v0.5.0 just got tagged!

Windows build

[EwoutH]

Amphion announced the CS8142 (PDF), the first AV1 hardware decoder!

SVT-AV1 just opened a huge PR with unit tests: #260. They also have a lot of development branches open, including one with a lot of AVX2 and AVX512 optimizations.

[dapperdan]

Faster decoding in Firefox thanks to Dav1d:

https://blog.mozilla.org/blog/2019/0...ter-than-ever/

We have seen great growth in the use of AV1 even in just a few months, with our latest figures showing that 11.8% of video playback in Firefox Beta used AV1, up from 0.85% in February and 3% in March.

[sneaker_ger]

11.8%? How? Did Youtube roll out AV1 big time?

[dapperdan]

The 80/20 rule would suggest you only need to encode 20% of the currently popular videos to get 80% of the views so getting up to 11% should be relatively straightforward if YouTube focus on the big hits.

[lvqcl]

Originally Posted by sneaker_ger

11.8%? How? Did Youtube roll out AV1 big time?

It seems that Youtube now streams SD video (480p and below) in AV1 format by default.

[hin12]

Originally Posted by lvqcl

It seems that Youtube now streams SD video (480p and below) in AV1 format by default.

All channels with >1 million subs I've seen have AV1 available in SD for videos uploaded from January onwards. I posted this on March 6th:

Originally Posted by hin12

Is 480p the highest quality option for all AV1 videos on YouTube? I'm seeing that a lot of popular videos are being encoded to AV1, but only at the 144p, 240p, 360p and 480p resolutions.

You had to enable the setting on testtube back then, though.

[lvqcl]

Originally Posted by hin12

You had to enable the setting on testtube back then, though.

And now it's unnecessary; that's the point.

[stax76]

What is currently the fastest AV1 encoder?

[Tommy Carrot]

Originally Posted by stax76

What is currently the fastest AV1 encoder?

SVT-AV1 with the default preset. The quality is bad though.

Aomenc with --cpu-used=8 --rt is even faster, but the quality is absolutely rancid.

[stax76]

Originally Posted by Tommy Carrot

SVT-AV1 with the default preset. The quality is bad though.

Aomenc with --cpu-used=8 --rt is even faster, but the quality is absolutely rancid.

I'll be waiting for improved encoders then.

[ChaosKing]

rav1e is "fast" with ok quality.

[stax76]

Originally Posted by ChaosKing

rav1e is "fast" with ok quality.

Last time I tried rav1e 2019-04-30 and it was SLOW AS HELL, like < 1 fps.

[ChaosKing]

Originally Posted by stax76

Last time I tried rav1e 2019-04-30 and it was SLOW AS HELL, like < 1 fps.

1 fps is fast for av1