(At least) MPEG-DASH videos with Screen Aspect Ration (SAR) different than 1:1 are wrongly displayed when played with dash.js 2.9.0. The code that computes width/height on MSE is applying the SAR correction inversely. The actual result is a back and forth aspect switch between what dash.js (properly) computes as video resolution and what MSE (wrongly) computes as video resolution. For instance, in a video hacked to have SAR 2:1 (so it should have twice its normal width) the video is displayed with double-width, then half-width, then double, etc. Note that the video has double-width when the MPEG-DASH URL is played using a standalone gst-play-1.0 player.
Created attachment 352032 [details] Patch
Comment on attachment 352032 [details] Patch Clearing flags on attachment: 352032 Committed r237033: <https://trac.webkit.org/changeset/237033>
All reviewed patches have been landed. Closing bug.
<rdar://problem/45189891>
*** Bug 183591 has been marked as a duplicate of this bug. ***
(In reply to Philippe Normand from comment #5) > *** Bug 183591 has been marked as a duplicate of this bug. *** I think that should be the opposite ;)