[Webkit-unassigned] [Bug 224960] New: Canvas capture stream should always emit its first frame.
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu Apr 22 17:06:48 PDT 2021
https://bugs.webkit.org/show_bug.cgi?id=224960
Bug ID: 224960
Summary: Canvas capture stream should always emit its first
frame.
Product: WebKit
Version: WebKit Nightly Build
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: WebRTC
Assignee: webkit-unassigned at lists.webkit.org
Reporter: jya at apple.com
CC: youennf at gmail.com
Seen in bug 220972.
The test video-vp8-videorange.html added draw into a canvas and create a MediaStream that is passed to a RTCPeerConnection.
The remote RTCPeerConnection's MediaStream is then set as source for a video element we then wait for the video element's play promise to be resolved to continue.
The play promise won't be resolved unless you continuously update the canvas.
It appears that MediaPlayerPrivateMediaStreamAVFObjC::updateReadyState() will not move past HAVE_METADATA if the canvas emitted its frame before the video element was setup.
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