RESOLVED FIXED302933
REGRESSION (iOS 26.1): videoElement.audioTrack incorrectly changes "description" kind to main when the system settings prefer it 
https://bugs.webkit.org/show_bug.cgi?id=302933
Summary REGRESSION (iOS 26.1): videoElement.audioTrack incorrectly changes "descripti...
Jim Ley
Reported 2025-11-21 03:29:48 PST
Created attachment 477459 [details] Simple test m3u8 and page. When AD is enabled in OS settings - Settings > Accessibility > Audio Descriptions Toggle > enabled And you play a video in Safari with both an AD and a main track, the AD track is correctly played, however the audioTracks API changes that audioTrack "kind" to be main rather than description, this is correct in previous iOS / iPadOS versions. Open the attached example page, see the console return two audioTracks on the video element, when the AD toggle is off one is kind:main one is kind:description, when the AD toggle is on, they are both main and there is now way of distinguishing between the two (to provide a UI to swap back to the non AD track or in other multi-language scenarios to allow them to swap back. iOS26.1 is the first place we've seen this, it's correct in all previous.
Attachments
Simple test m3u8 and page. (64.27 KB, application/x-zip-compressed)
2025-11-21 03:29 PST, Jim Ley 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2025-11-21 12:49:12 PST
<rdar://problem/165229625>
roberto_rodriguez2
Comment 2 2025-12-11 21:37:27 PST
Pull request: https://github.com/WebKit/WebKit/pull/55293
EWS
Comment 3 2026-01-26 15:07:55 PST
Committed 306249@main (3bb5190507ae): <https://commits.webkit.org/306249@main> Reviewed commits have been landed. Closing PR #55293 and removing active labels.
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