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AV2 video codec delivers 30% lower bitrate than AV1, final spec due in late 2025

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Re: AV2 video codec delivers 30% lower bitrate than AV1, final spec due in late 2025

#21

Post by occz »

olowe wrote: post #5
jonplackett wrote: post #2

It’s pretty amazing people are still finding ways to make video smaller. Is this just people being clever or is it also more processing power being thrown at the problem when decoding / encoding?

It’s more money and more user’s compute being thrown at the problem to get the streaming service’s CDN bill down.

While funny, that's not really what I would call accurate. Users get reduced data consumption, potentially higher quality selection if the bandwidth now allows for a higher resolution to be streamed, and possibly lower disk usage should they decide to offline the videos.

Better codecs are an overall win for everyone involved.

Re: AV2 video codec delivers 30% lower bitrate than AV1, final spec due in late 2025

#24

Post by magicalhippo »

meindnoch wrote: post #15
IshKebab wrote: post #9

We must be reaching the limit at which video codecs can only achieve better quality by synthesizing details. That's already pretty prevalent in still images - phone cameras do it, and there are lots of AI resizing algorithms that do it. It doesn't look like AV2 does any of that yet though fortunately (except film grain synthesis but I think that's fine).

I think Fabrice Bellard have been experimenting with neural codecs like that.

The one I recall done by him was NNCP[1], a lossless compressor.

[1]: https://bellard.org/nncp/

Re: AV2 video codec delivers 30% lower bitrate than AV1, final spec due in late 2025

#25

Post by ksec »

IshKebab wrote: post #9

We must be reaching the limit at which video codecs can only achieve better quality by synthesizing details. That's already pretty prevalent in still images - phone cameras do it, and there are lots of AI resizing algorithms that do it. It doesn't look like AV2 does any of that yet though fortunately (except film grain synthesis but I think that's fine).

>We must be reaching the limit at which video codecs can only achieve better quality by synthesizing details.

Not quite yet as shown in H.267. But at some point the computational requirement vs bandwidth saving benefits would no longer make sense.

Re: AV2 video codec delivers 30% lower bitrate than AV1, final spec due in late 2025

#26

Post by [deleted] »

ttoinou wrote: post #17
latexr wrote: post #13

I always thought the name AV1 was partly a play on/homage to AVI (Audio Video Interlace), but AV2 breaks that. Even if it’s meant to be embedded into other container formats such as MP4, there are files with the .av1 extension and there is a video/AV1 MIME type (and possibly a UTI?). Does this mean we now need to duplicate all that to .av2 and video/AV2? What about the AVIF file format?

Do you mean the file extension should only reflect the file format and not the codecs it has inside ? Maybe that’s what we did in the past and it was a bad idea. It’d be useful to know if you can read the file by looking only at its extension

[deleted]

Re: AV2 video codec delivers 30% lower bitrate than AV1, final spec due in late 2025

#27

Post by circuit10 »

occz wrote: post #22
jeden wrote: post #14

I wait on new codec invented #AI

You'll be waiting for a long time then, probably. Making codecs is actually a hard problem, the type of thing that AI completely falls over when tasked with.

Considering AI is good at predicting things and that’s largely what compression does, I could see machine learning techniques being useful as a part of a codec though (which is a completely different thing from asking ChatGPT to write you a codec)

Re: AV2 video codec delivers 30% lower bitrate than AV1, final spec due in late 2025

#29

Post by throwaway48476 »

ttoinou wrote: post #6
seydor wrote: post #3

All this high speed fiber for nothing...

well we might start streaming 8K content ! Or maybe this could be used for 16K VR videos

It's a shame European energy efficiency rules made 8K non viable. It's a great resolution.

Re: AV2 video codec delivers 30% lower bitrate than AV1, final spec due in late 2025

#30

Post by throwaway48476 »

magicalhippo wrote: post #24
meindnoch wrote: post #15

Earlier quoted context omitted.

I think Fabrice Bellard have been experimenting with neural codecs like that.

The one I recall done by him was NNCP[1], a lossless compressor. [1]: https://bellard.org/nncp/

Computings own Da Vinci.
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