Support rendering of multimedia uploaded in AVIF file format

The filename filter of the image upload picker is excluding them. The photo is not rendered in the timeline when attached as a file either, unlike webp, webm (VP9), png or jpeg that does show in a player. An AV1 video encapsulated in webm container does show up after attaching as a file (does not show if encapsulated in mkv).

av1 support level

Chrome 67 (2018)
Edge 18 (2018)
Safari 17 (2023)
Firefox 67 (2019)
Samsung Internet 12 (2020)

Android 10 (2019)
hardware: M3, Apple A17 (2023)
software: dav1d | Codec Wiki

avif support level

Baseline 2024
Chrome 85 (2020)
Edge 114 (2023)
Safari 16.1 (2022)
Firefox 77 (2020)
Samsung Internet 14.0 (2021)

Android 12 (2021)
iOS 16 (2022)

Previously solved questions about webp

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I think this is falls under Mov file is not displayed in the media library · Issue #4663 · deltachat/deltachat-desktop · GitHub.

Probably. But the uploading file extension filter and the Apps & Media filter would also need to be updated.

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