How do I specify AVIF to use AV1 and also how to specify the encoding "effort"?

[FluffyDiscord]

title

[jcupitt]

Hi @FluffyDiscord, the docs are here:

https://www.libvips.org/API/current/VipsForeignSave.html#vips-heifsave

So perhaps:

$image->writeToFile("x.avif", ["effort" => 9]);

.avif filenames are always encoded with av1. You can use the encoder param to set which AV1 encoder you prefer.

[FluffyDiscord]

thank you