276562 2024-07-12 16:24:29 -0700 [ iOS18 ] 3 wpt/webcodecs/* layout tests are constantly failing. 2025-05-16 16:44:13 -0700 1 1 1 Unclassified WebKit Web Audio WebKit Nightly Build Unspecified Unspecified RESOLVED INVALID InRadar P2 Normal --- 1 ben_schwartz webkit-unassigned bfulgham cdumez webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 2046060 0 ben_schwartz 2024-07-12 16:24:29 -0700 The following two tests (and many variants) are constantly failing on iOS 18: imported/w3c/web-platform-tests/webcodecs/full-cycle-test.https.any.html imported/w3c/web-platform-tests/webcodecs/full-cycle-test.https.any.worker.html HISTORY: No link, as we don't currently perform automated testing on iOS 18 in CI. TEXT DIFF: Most diffs have lines similar to "+(Encoder Configuration) AllowFrameReordering is not supported for H264_Baseline_3_0", or "DataError: Key frame is required". REPRODUCIBILITY: I was able to reproduce this issue on the latest iOS 18 simulator ToT using the following command: run-webkit-tests --ios-simulator -v --clobber-old-results imported/w3c/web-platform-tests/webcodecs/full-cycle-test.https.any.html imported/w3c/web-platform-tests/webcodecs/full-cycle-test.https.any.worker.html 2046064 1 ben_schwartz 2024-07-12 16:30:04 -0700 It appears that the failures stem from an issue with h264. The unexpected failures are: imported/w3c/web-platform-tests/webcodecs/full-cycle-test.https.any.html?h264_annexb imported/w3c/web-platform-tests/webcodecs/full-cycle-test.https.any.html?h264_avc imported/w3c/web-platform-tests/webcodecs/full-cycle-test.https.any.worker.html?h264_annexb 2046065 2 webkit-bug-importer 2024-07-12 16:30:13 -0700 <rdar://problem/131640556> 2046066 3 ben_schwartz 2024-07-12 16:31:08 -0700 ^ and: imported/w3c/web-platform-tests/webcodecs/videoDecoder-codec-specific.https.any.html?h264_annexb 2046068 4 ews-feeder 2024-07-12 16:43:05 -0700 Test gardening commit 280929@main (1168d5b38082): <https://commits.webkit.org/280929@main> Reviewed commits have been landed. Closing PR #30773 and removing active labels. 2117808 5 bfulgham 2025-05-16 16:44:13 -0700 Upon review, this was determined to be behaving as expected.