slow decoding of animated AVIF images

Question

Created 1w

Replies 2

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Safari is supposed to support animated AVIF images since version 16, but the ones I've tested perform very poorly, even on an M4 Mac Mini running Sequoia 15.1.1.

I believe Safari delegates decoding to the operating system itself, so this issue also happens in Live Preview in the finder, when I try to preview a file.

Sample file here: https://s3.us-west-2.amazonaws.com/cdn.paintera.org/test/sample.avif

322KB file, 5 seconds long, 12fps

This plays perfectly on Chrome on Mac OS, but is slow and laggy on Safari and Live Preview (it takes about 6.5 seconds to finish the 5 second video).

Does anyone know how to fix this or workaround this issue?

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Answer 1

Engineer OP

Apple

1w

Hello @skunkwerk, thank you for your post. Our engineering teams need to investigate this issue, as resolution may involve changes to Apple's software. I'd greatly appreciate it if you could open a bug report, include a sysdiagnose and/or minimal test Xcode project, and post the FB number here once you do. Bug Reporting: How and Why? has tips on creating your bug report.

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Answer 2

skunkwerk OP

1w

thanks, I actually filed the bug reports a few days ago, but was hoping someone else on the forum would have some insights as well.

for iOS Safari: FB16252684

for MacOS Safari: FB16252692

As it's likely an OS-level issue, I'm not sure if I should create other issues but have left it at Safari for now.

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