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Has anyone found a good way to upload AVIF images files through the WordPress media uploader?

I've seen variations of this code posted everywhere:

function allowed_mime_types( $mime_types ) {

  //AVIF Images
  $mime_types['avif'] = 'image/avif';

  return $mime_types;
}

add_filter( 'upload_mimes', 'allowed_mime_types' );

But, when I use that I still get an error:

Sorry, this file type is not permitted for security reasons.

I confirmed that avif is added to the list of extensions in the plupload localized script vars, but still no joy. What am I missing?

Improve this question
3
  • Try with adding this plugin for expand security reasons wordpress.org/plugins/blob-mimes
    – Gregory
    Dec 1, 2020 at 0:58
  • Thanks for the suggestion. Can you confirm if that plugin allows AVIF uploads? What technique does it use? I took a quick look at the source, but it's a pretty heavy plugin, and I wasn't able to quickly see how it works.
    – Dominic P
    Dec 1, 2020 at 19:17
  • honestly i've didn't try it, but after looking around, it seems to be the solution.
    – Gregory
    Dec 3, 2020 at 8:29

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