230903 2021-09-28 11:26:36 -0700 REGRESSION (Safari 15 - iOS15): [WebRTC] Increased audio latency while playing webrtc audio stream over audio element 2022-02-08 06:11:02 -0800 1 1 1 Unclassified WebKit Web Audio Other iPhone / iPad Other RESOLVED FIXED InRadar P1 Blocker --- 1 asanand youennf cdumez chrisguttandin cxdevteam eric.carlson ews-watchlist firstcontact glenn jer.noble philipj sergio smoley webkit-bug-importer youennf oldest_to_newest 1797964 0 asanand 2021-09-28 11:26:36 -0700 We are observing noticeable increase in audio latency in Safari browser after IOS 15 update. Our Client side implementation plays webrtc audio stream received from server on HTML audio element. Please note audio latency is measured as time difference when audio action is triggered on client and when audio is heard on client. We have verified this behavior on safari browser on following IOS iPhone 12 Pro running iOS 15.0 - repro M1 iPad Pro iOS 15.0 - repro iPhone SE running iOS 15.0 - repro iPhone XS Max running iOS 14.5 - no repro 1798642 1 webkit-bug-importer 2021-09-29 16:01:47 -0700 <rdar://problem/83692944> 1798702 2 smoley 2021-09-29 17:28:29 -0700 Thanks for filing, is there a live test case that illustrates the issue? 1798871 3 firstcontact 2021-09-30 08:24:18 -0700 Webrtc audio and video are also out of sync in 15 when both are played through an HTMLVideoElement. Playing the audio through an AudioContext restores sync, but is presenting audio rendering problems (stuttering in audiocontext) in Chrome/iOs as of 15.1 beta2 (was fine as of 15.1 beta 1). Feel free to contact me offlist for a live test case. 1806589 4 youennf 2021-10-20 06:23:54 -0700 I'll be happy to get access to a live test, can a link be sent to youenn@apple.com? 1807616 5 442142 youennf 2021-10-22 03:20:20 -0700 Created attachment 442142 Patch 1807710 6 ews-feeder 2021-10-22 09:31:41 -0700 Committed r284689 (243409@main): <https://commits.webkit.org/243409@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 442142. 1812534 7 cxdevteam 2021-11-07 20:57:48 -0800 which version will include this fix? 1817396 8 asanand 2021-11-22 23:33:44 -0800 Which version will have this fix ? 1838634 9 asanand 2022-02-08 06:11:02 -0800 W are still facing this issue on 15.4 beta. Is the fix included in this specific version? 442142 2021-10-22 03:20:20 -0700 2021-10-22 09:31:42 -0700 Patch bug-230903-20211022122018.patch text/plain 2451 youennf U3VidmVyc2lvbiBSZXZpc2lvbjogMjg0NTkyCmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViS2l0L0No YW5nZUxvZyBiL1NvdXJjZS9XZWJLaXQvQ2hhbmdlTG9nCmluZGV4IGJkOTIwOTk4NmFkN2YzOTVk ZjZiYmVjMmYyZDA2NDNmMjdkOTU1NzYuLjgwY2NmNjczNDcwYTA4NDQzMzIxZWVkYTM5MTIyNzU3 OTA0YTE5ODggMTAwNjQ0Ci0tLSBhL1NvdXJjZS9XZWJLaXQvQ2hhbmdlTG9nCisrKyBiL1NvdXJj ZS9XZWJLaXQvQ2hhbmdlTG9nCkBAIC0xLDMgKzEsMjAgQEAKKzIwMjEtMTAtMjIgIFlvdWVubiBG YWJsZXQgIDx5b3Vlbm5AYXBwbGUuY29tPgorCisgICAgICAgIFJFR1JFU1NJT04gKFNhZmFyaSAx NSAtIGlPUzE1KTogW1dlYlJUQ10gSW5jcmVhc2VkIGF1ZGlvIGxhdGVuY3kgd2hpbGUgcGxheWlu ZyB3ZWJydGMgYXVkaW8gc3RyZWFtIG92ZXIgYXVkaW8gZWxlbWVudAorICAgICAgICBodHRwczov L2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5jZ2k/aWQ9MjMwOTAzCisgICAgICAgIDxyZGFyOi8v cHJvYmxlbS84MzY5Mjk0ND4KKworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4K KworICAgICAgICBXZSB1c2VkIHRvIHJlbmRlciBhdWRpbyB0cmFja3MgaW4gcHJvY2VzcyBhbmQg YXJlIG5vdyBkb2luZyByZW5kZXJpbmcgaW4gR1BVIHByb2Nlc3MuCisgICAgICAgIEN1cnJlbnQg aW1wbGVtZW50YXRpb24gcmVxdWVzdHMgZGF0YSB3aXRoIGEgZml4ZWQgY2h1bmsgc2l6ZSwgdGhh dCB3ZSB3ZXJlIHNldHRpbmcgYXMgdGhlIG1heCBvZiBwcmVmZXJyZWQgYnVmZmVyIHNpemUgYW5k IHdlYiBhdWRpbyBjaHVuayBzaXplLgorICAgICAgICBJZiB3ZSBhcmUgcmVhZGluZyB0b28gY2xv c2UgdG8gdGhlIGVuZCBvZiBkYXRhIGluIEF1ZGlvU2FtcGxlRGF0YVNvdXJjZSwgd2Ugd2lsbCBk ZWxheSByZWFkaW5nIHRoZSBkYXRhIGJ5IHRoaXMgYnVmZmVyIHNpemUuIFRoaXMgdHJpZ2dlcnMg ZGVsYXkgYnV0IGFsbG93cyBnZXR0aW5nIGEgY29uc2lzdGVudCByZW5kZXJpbmcuCisgICAgICAg IFRvIHJlZHVjZSBkZWxheSwgd2UgYXJlIG5vdyB1c2luZyB0aGUgbWF4aW11bSBvZiB3ZWIgYXVk aW8gY2h1bmsgc2l6ZSBhbmQgMTAgbXMgY2h1bmsgc2l6ZSwgYXMgV2ViUlRDIHRyYWNrcyBhcmUg dXN1YWxseSBtYW5pcHVsYXRpbmcgMTAgbXMgY2h1bmtzLgorCisgICAgICAgIE1hbnVhbGx5IHRl c3RlZC4KKworICAgICAgICAqIEdQVVByb2Nlc3Mvd2VicnRjL1JlbW90ZUF1ZGlvTWVkaWFTdHJl YW1UcmFja1JlbmRlcmVySW50ZXJuYWxVbml0TWFuYWdlci5jcHA6CisKIDIwMjEtMTAtMjEgIFlv dWVubiBGYWJsZXQgIDx5b3Vlbm5AYXBwbGUuY29tPgogCiAgICAgICAgIEF1ZGlvIG92ZXIgcGVl ciBjb25uZWN0aW9uIGJlY29tZXMgbGF0ZW50IHdoZW4gY2hhbmdpbmcgdGhlIG91dHB1dApkaWZm IC0tZ2l0IGEvU291cmNlL1dlYktpdC9HUFVQcm9jZXNzL3dlYnJ0Yy9SZW1vdGVBdWRpb01lZGlh U3RyZWFtVHJhY2tSZW5kZXJlckludGVybmFsVW5pdE1hbmFnZXIuY3BwIGIvU291cmNlL1dlYktp dC9HUFVQcm9jZXNzL3dlYnJ0Yy9SZW1vdGVBdWRpb01lZGlhU3RyZWFtVHJhY2tSZW5kZXJlcklu dGVybmFsVW5pdE1hbmFnZXIuY3BwCmluZGV4IGIyODljN2FiYTI4MTcwNzUxNjZiOWNjMjk3ZWJj MmY1MzU4MWU3NDMuLmQ0M2NjZDIxYzQxN2M5MmRlMWNkOWQ5YzE2MTA3MTBkZGQzNTJlNTIgMTAw NjQ0Ci0tLSBhL1NvdXJjZS9XZWJLaXQvR1BVUHJvY2Vzcy93ZWJydGMvUmVtb3RlQXVkaW9NZWRp YVN0cmVhbVRyYWNrUmVuZGVyZXJJbnRlcm5hbFVuaXRNYW5hZ2VyLmNwcAorKysgYi9Tb3VyY2Uv V2ViS2l0L0dQVVByb2Nlc3Mvd2VicnRjL1JlbW90ZUF1ZGlvTWVkaWFTdHJlYW1UcmFja1JlbmRl cmVySW50ZXJuYWxVbml0TWFuYWdlci5jcHAKQEAgLTE0Miw3ICsxNDIsOCBAQCBSZW1vdGVBdWRp b01lZGlhU3RyZWFtVHJhY2tSZW5kZXJlckludGVybmFsVW5pdE1hbmFnZXI6OlVuaXQ6OlVuaXQo QXVkaW9NZWRpYVN0cgogICAgICAgICAgICAgY2FsbGJhY2soeyB9LCAwKTsKICAgICAgICAgICAg IHJldHVybjsKICAgICAgICAgfQotICAgICAgICBtX2ZyYW1lQ2h1bmtTaXplID0gc3RkOjptYXgo V2ViQ29yZTo6QXVkaW9VdGlsaXRpZXM6OnJlbmRlclF1YW50dW1TaXplLCBXZWJDb3JlOjpBdWRp b1Nlc3Npb246OnNoYXJlZFNlc3Npb24oKS5wcmVmZXJyZWRCdWZmZXJTaXplKCkpOworICAgICAg ICBzaXplX3QgdGVuTXNTYW1wbGVTaXplID0gZGVzY3JpcHRpb24tPnNhbXBsZVJhdGUoKSAqIDEw IC8gMTAwMDsKKyAgICAgICAgbV9mcmFtZUNodW5rU2l6ZSA9IHN0ZDo6bWF4KFdlYkNvcmU6OkF1 ZGlvVXRpbGl0aWVzOjpyZW5kZXJRdWFudHVtU2l6ZSwgdGVuTXNTYW1wbGVTaXplKTsKICAgICAg ICAgY2FsbGJhY2soKmRlc2NyaXB0aW9uLCBtX2ZyYW1lQ2h1bmtTaXplKTsKICAgICB9KTsKIH0K