RESOLVED FIXED 277335
REGRESSION (iOS 18 beta): Using MP4 in <img> element causes the video to stutter 
https://bugs.webkit.org/show_bug.cgi?id=277335
Summary REGRESSION (iOS 18 beta): Using MP4 in <img> element causes the video to stu...
Mads Erik Forberg
Reported 2024-07-30 01:48:25 PDT
In iOS 18 public beta (22A5307i), using MP4 files as "gifs" causes the video to stutter. Steps to reproduce: 1. Use Safari on iOS 18. 2. Goto https://static.vg.no/img-mp4-example/ 3. Video stutters. This is working fine in previous versions of iOS / Safari. Test device: iPhone 14 Pro
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Radar WebKit Bug Importer
Comment 1 2024-07-30 16:05:04 PDT
<rdar://problem/132853008>
Alexey Proskuryakov
Comment 2 2024-08-05 17:08:27 PDT
Thank you for the report. We haven't been able to reproduce this so far. Could you please try with the current beta?
Mads Erik Forberg
Comment 3 2024-08-06 00:12:33 PDT
Still happening on iOS 18 build 22A5316k (public beta).
Mads Erik Forberg
Comment 4 2024-08-06 00:13:43 PDT
You can see the stuttering in action here: https://drive.google.com/file/d/19K_iSonO5CuA9ZRG3JppDEhWLep7Na7n/view?usp=sharing
Mads Erik Forberg
Comment 5 2024-08-07 01:23:36 PDT
Just updated to beta 3 of iOS 18 (22A5326f) - and the issue seems to be resolved. You can close this issue now. Thank you for following up :-)
Alexey Proskuryakov
Comment 6 2024-08-07 09:01:25 PDT
Awesome, this explains why we couldn't reproduce! Thank you for the update.
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