[Webkit-unassigned] [Bug 190464] New: [GStreamer][MSE] Fix height calculation for streams with source aspect ratio

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190464

            Bug ID: 190464
           Summary: [GStreamer][MSE] Fix height calculation for streams
                    with source aspect ratio
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: eocanha at igalia.com

(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.

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