Bug 257956

Summary:

MediaStream from canvas (captureStream) cannot be rendered into a different canvas

Product:

WebKit

Reporter:

Simon Leber <simon.leber>

Component:

Canvas

Assignee:

youenn fablet <youennf>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

dino, eric.carlson, jer.noble, markericc02, roch.sebastien, simon.leber, webkit-bug-importer, youennf

Priority:

Keywords:

InRadar

Version:

Safari 16

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Reproduction	none

Description Simon Leber 2023-06-12 08:02:40 PDT

The Mediastream returned from a canvas captureStream call can not be used to be rendered into another canvas using drawImage (2d context) or createImageBitmap/transferFromImageBitmap (bitmaprenderer context)
The following CodePen shows the problem in a short example.

https://codepen.io/sleb91/pen/bGQdPxq

I have tested on Safari on Mac (Version 16.5 (18615.2.9.11.4)) and latest IOS Safari (16.5)

Comment 1 Sébastien Roch 2023-06-12 08:40:42 PDT

Created attachment 466670 [details]
Reproduction

Attached reproduction as simple HTML file.

Comment 2 Radar WebKit Bug Importer 2023-06-13 01:33:37 PDT

<rdar://problem/110696945>

Comment 3 youenn fablet 2023-06-13 01:36:19 PDT

Pull request: https://github.com/WebKit/WebKit/pull/14910

Comment 4 EWS 2023-06-13 11:40:31 PDT

Committed 265128@main (e7326a948d62): <https://commits.webkit.org/265128@main>

Reviewed commits have been landed. Closing PR #14910 and removing active labels.