281406 2024-10-13 20:38:27 -0700 [MediaRecorder/WebM] First frames are missed in a recording 2024-10-15 18:47:22 -0700 1 1 1 Unclassified WebKit Media WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=281489 InRadar P2 Normal --- 1 jean-yves.avenard jean-yves.avenard webkit-bug-importer oldest_to_newest 2067651 0 jean-yves.avenard 2024-10-13 20:38:27 -0700 STR: Open https://jernoble.github.io/samples/bin/media-recorder/bip-bop.html By default MP4 is selected with. Click on Start wait a few seconds click on stop. On the right side, it shows the first frame (it has 000001 in the counter). Now click on reset, select webm/vp8 and repeat the step above. The frame showing on the right is typically 3, sometimes 4. The first 2 frames have been dropped. This occurs when video is received before any audio, we drop the samples as we set that timestamp 0 is the start time of the first audio frame. 2067652 1 webkit-bug-importer 2024-10-13 20:38:48 -0700 <rdar://problem/137854083> 2067674 2 jean-yves.avenard 2024-10-13 23:35:56 -0700 Pull request: https://github.com/WebKit/WebKit/pull/35136 2067968 3 jean-yves.avenard 2024-10-14 23:07:40 -0700 Pull request: https://github.com/WebKit/WebKit/pull/35112 2068259 4 ews-feeder 2024-10-15 18:47:21 -0700 Committed 285236@main (2562b4f9c893): <https://commits.webkit.org/285236@main> Reviewed commits have been landed. Closing PR #35136 and removing active labels.