Odd you should say that, as that's exactly what they've been discussing

No it's not. This article is about proposing Brotli as another possible '/Filter' for stream objects, like content streams (page drawing commands). Images are streams too, but unless you mean compressing raw pixel bytes in Brotli, there's no mention of a JPEG-XL or WEBP filter.

well, not mentioned in this specific article. But JPEG-XL support is something they're working on [1].

[1]: https://pdfa.org/wp-content/uploads/2025/10/PDFDays2025-Brea...

Oh cool!! TIL

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