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Change AV1 and VP9 quantizer range from 0-63 to 0-255 - #915

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Djuffin merged 1 commit into
w3c:mainfrom
Djuffin:qp
Dec 4, 2025
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Djuffin merged 1 commit into
w3c:mainfrom
Djuffin:qp

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@Djuffin

@Djuffin Djuffin commented Nov 25, 2025

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This change fixes: #904

@Djuffin
Djuffin merged commit ac7216c into w3c:main Dec 4, 2025
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Djuffin deleted the qp branch March 10, 2026 21:40
@Vanilagy

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Ughhh this violates the spec no?

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Note that this came up here

Vanilagy/mediabunny#566

@sprangerik

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Agree, VP9 should be updated to 0-255 and VP8 too should be updated to 0-127.

@Vanilagy

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Wait, sorry, it is updated already. Is the codec registry page not being rebuilt regularly?
https://www.w3.org/TR/webcodecs-vp9-codec-registration/

@Djuffin

Djuffin commented Oct 15, 2026

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whoops. apparently our publishing process is broken :(

@Vanilagy

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Aha!

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Change quantizer range for Av1 from 0-63 to 0-255

4 participants