Alliance for Open Media codecs

[rwill]

Originally Posted by VoodooFX

Another cringe AV1 vs h265: https://www.red5.net/blog/av1-vs-h265

"[Picture] An Indian developer migrates from the H.265 video codec to AV1."

And this was the point where I closed the Browser Tab.

[oibaf]

AV1 now powers 30% of Netflix streaming: "On track to become number one"
https://www.flatpanelshd.com/news.ph...&id=1764912460
https://netflixtechblog.com/av1-now-...g-02f592242d80

[benwaggoner]

Originally Posted by VoodooFX

Another cringe AV1 vs h265: https://www.red5.net/blog/av1-vs-h265

Yeah, that reads like it was written by AI from press releases. The table even gives HEVC as the winner for encoding quality, contradicting the entire premise of the article!

AV1 isn't 30-50% more efficient than HEVC in any world. AV2 might achieve that, sure. But with equivalent tuning effort and encoding time, AV1 average bitrate is more like 15-25% better than HEVC (although is improving as there's more psychovisual tuning headroom in AV1 than the more mature HEVC).

[CruNcher]

Correct also important factor the Broadcast Playout side even if many don't see it yet but as soon as AV2 takes it over it is the end for MPEG as you knew it

https://www.youtube.com/watch?v=PNwPEcc1r3k

"Power to defy the enemy is not in him"

[ksec]

Originally Posted by CruNcher

Correct also important factor the Broadcast Playout side even if many don't see it yet but as soon as AV2 takes it over it is the end for MPEG as you knew it

https://www.youtube.com/watch?v=PNwPEcc1r3k

"Power to defy the enemy is not in him"

That is again, assuming they learned from their mistakes.

But they still haven't released it yet.

[hajj_3]

AVIF 1.2.0 was released a week ago: https://aomedia.org/blog%20posts/AV1...ade-with-AVIF/

[Z2697]

Just useless features no one is really gonna use...

I know lossless is "just an option" but they claim 10% size reduction over PNG? That's the best joke I've heard today. (It's often worse than PNG)
Everyone knows AVIF (or any Video-Codec-Based-Image-Format) is BAD at lossless RGB encoding.
Just use JPEG XL FOR F**KS SAKE. (facepalm)

[VoodooFX]

Originally Posted by benwaggoner

AV1 isn't 30-50% more efficient than HEVC in any world. AV2 might achieve that, sure. But with equivalent tuning effort and encoding time, AV1 average bitrate is more like 15-25% better than HEVC

In what conditions? Grainless 4/8K in synthetic metrics!?
In my subjective conditions [random film with grain in <= HD, "my eyes" metrics] AV1 is negatively better up to ~0% than HEVC.

Does anyone know why AV1 doesn't embed the encoder settings?

[soresu]

Originally Posted by VoodooFX

Does anyone know why AV1 doesn't embed the encoder settings?

All that embedding stuff is a function of the encoder, not the codec standard itself.

All the major encoders are open source, so if it's not doing that then file a bug to that effect.

[GeoffreyA]

Most encoders don't. We've just become used to x264 and x265 doing it.

[soresu]

Originally Posted by GeoffreyA

Most encoders don't. We've just become used to x264 and x265 doing it.

Aaaaahhh I see, hmmm.

I'll mention it to BlueSwordM and see if he knows anyone who can mention it to somebody on the SVT AV1 team at least.

I've used it a few times now and didn't realise there was no settings recorded with each file.

[VoodooFX]

That would help in the community discussions/tunings as various SVT-AV1 forks use different defaults.

[Z2697]

Is there an equivalent of SEI UDU in AV1/OBU?

[GeoffreyA]

Originally Posted by soresu

Aaaaahhh I see, hmmm.

I'll mention it to BlueSwordM and see if he knows anyone who can mention it to somebody on the SVT AV1 team at least.

I've used it a few times now and didn't realise there was no settings recorded with each file.

It would be helpful indeed, having that information.

Originally Posted by Z2697

Is there an equivalent of SEI UDU in AV1/OBU?

https://aomediacodec.github.io/av1-spec/av1-spec.pdf

I tried but it's a needle in a haystack. T35 seems to be used for DV.

[nevcairiel]

In general terms, the metadata OBU is similar to the SEI NALU. T-35 is an extensible metadata segment, which also exists in SEI.

[Z2697]

But the User Data Unregistered is basically arbitrary data, AV1's metadata OBU while possible to extend, does not register a similar type. (Register an Unregistered type, heh)

[rwill]

Linked AV1 spec pdf page 134 (doc 122). Table .. [omg, they did not number the table]. Its the metadata_type table.

There it says the metadata_type values 6 to 31 are Unregistered user private, so go for it.

[ksec]

I dont even remember if I said it before, but even Lunar New Year came and no still AV2. I guess the end of year must be on their usual AOM / On Calendar.

Old habits die hard.

[benwaggoner]

Originally Posted by ksec

I dont even remember if I said it before, but even Lunar New Year came and no still AV2. I guess the end of year must be on their usual AOM / On Calendar.

Old habits die hard.

I keep being reassured that it should be out in 6-8 weeks.

I hear it'll be out in 6-8 weeks.

Ask me again in 6 weeks, and I suspect I'll say the same thing.