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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - HTMLVideoElement with MediaStream src shows paused image when all video tracks are disabled"
href="https://bugs.webkit.org/show_bug.cgi?id=160222">160222</a>
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<th>Summary</th>
<td>HTMLVideoElement with MediaStream src shows paused image when all video tracks are disabled
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Local Build
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>Other
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Minor
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>Media Elements
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>gruan@apple.com
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<p>
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<pre>According to HTML 5 Spec <a href="https://w3c.github.io/mediacapture-main/#life-cycle-and-media-flow">https://w3c.github.io/mediacapture-main/#life-cycle-and-media-flow</a>, "A muted or disabled MediaStreamTrack renders either silence (audio), black frames (video), or a zero-information-content equivalent."
Currently, when all MediaStreamTracks are disabled, the video renders a paused image from the last moment that the MediaStream had a track that was enabled.
It's preferred that the HTMLVideoElement render black frames for video, since
- The MSE equivalent of de-selecting all tracks renders black frames.
- If a canvas is painted to from a HTMLVideoElement with all of its tracks disabled, it is painted black.</pre>
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