Blog post correction. SVT-AV1 (Observing SVT-AV1 v2.1.0's improvements: A New Deep Dive)

[SnoutBaron]

In this: https://github.com/av1-community-contributors/codec-wiki/blob/main/blog/2024-05-19-svt-av1-deep-dive2-v2-1-0.mdx#presets-comparisons--1---13-12

Hence this: https://wiki.x266.mov/blog/svt-av1-second-deep-dive#presets-comparisons--1---13-12

The opposite is true. Preset 6 and 12 have been mapped to Preset 7 and 13 respectively. This is reflected in both:

• Videohelp's changelog history: https://www.videohelp.com/software/SVT-AV1/version-history

API updates

• One config parameter added within the padding size. Config param structure size remains unchanged
• Presets 6 and 12 are now pointing to presets 7 and 13 respectively due to the lack of spacing between the presets
• Further preset shuffling is being discussed in #2152

• And in Handbrake's UI (as of v1.8.2 which uses SVT-AV1 v2.1.0), as the preset slider will skip over 6 and 12.

The info is incorrect regarding the title:

• Original:

Presets comparisons (-1 -> ~13~ 12)

• Correction:

Presets comparisons (-1 -> ~12~ 13)

As well as this paragraph:

• Original:

Yes, you heard that right. Preset 7 and 13 are no more in v2.1.0. This new update, like the previous one, mostly consisted of optimizing the presets trade-offs. The devs have made the choice to map preset 7 to preset 6 and preset 13 to preset 12 due to the lack of spacing between the new presets. We will discuss the implications of this further ahead.

• Correction:

Yes, you heard that right. Preset 6 and 12 are no more in v2.1.0. This new update, like the previous one, mostly consisted of optimizing the presets trade-offs. The devs have made the choice to map preset 6 to preset 7 and preset 12 to preset 13 due to the lack of spacing between the new presets. We will discuss the implications of this further ahead.

The graphs are therefore also mislabelled but a message highlighting the error with a correction can be added at the top of the article so the reader knows to substitute P6 for P7 and P12 for P13.

[nekotrix]

Hello. I had been notified of this mistake when the blog post released, so I added this:

Again, there is no preset 7. Actually, it's preset 6 that disappeared but I'm not remaking the graphs just for fun. If you select preset 6, you will be granted the following message: Svt[warn]: Preset M6 is mapped to M7.

Here: https://wiki.x266.mov/blog/svt-av1-second-deep-dive#preset-7-v200-vs-v210

And this right before the speed comparison:

Just as preset 6, preset 12 is now mapped to 13

Here: https://wiki.x266.mov/blog/svt-av1-second-deep-dive#preset-12-v200-vs-v210

That preset 6 and 12 are mapped to 7 and 13 or vice versa doesn't really matter. I honestly don't see the point in updating such information for an outdated encoder version no one should be using anymore.

Thank you for your constructive criticism.