Bug 206812 – MSE video is not drawn onto canvas

• Status: RESOLVED
• Resolution: FIXED
• Component: Media

Similar to this bug:
https://bugs.webkit.org/show_bug.cgi?id=125157

Made a simple test page here:
https://s3.amazonaws.com/storage2.interlude.fm/dev_temp/tomer/safari_mse_canvas_bug/index.html

The above test page works correctly on other browsers (including IE), but MSE video is not drawn onto the canvas on Safari 13 (desktop + iPadOS).
Would appreciate any pointers - thanks!!

[Radar WebKit Bug Importer]

<rdar://problem/58916170>

[Andrey Starostin]

Another example: https://bugs.webkit.org/show_bug.cgi?id=186038

[Wenson Hsieh]

(In reply to tomerlahav from comment #0)
> Similar to this bug:
> https://bugs.webkit.org/show_bug.cgi?id=125157
> 
> Made a simple test page here:
> https://s3.amazonaws.com/storage2.interlude.fm/dev_temp/tomer/
> safari_mse_canvas_bug/index.html
> 
> The above test page works correctly on other browsers (including IE), but
> MSE video is not drawn onto the canvas on Safari 13 (desktop + iPadOS).
> Would appreciate any pointers - thanks!!

FWIW — this example works for me after enabling the experimental feature labeled "Experimental MediaSource Inline Painting" in the Develop > Experimental Features menu, on tip-of-tree WebKit (r285672)

[Aiden Liu]

> https://s3.amazonaws.com/storage2.interlude.fm/dev_temp/tomer/safari_mse_canvas_bug/index.html

Confirmed that this is occurring in iPadOS 15.1 and macOS monetary (safari version 15.2 (17612.3.6.1.6))

[Aiden Liu]

 
> FWIW — this example works for me after enabling the experimental feature
> labeled "Experimental MediaSource Inline Painting" in the Develop >
> Experimental Features menu, on tip-of-tree WebKit (r285672)

BTW, `tip-of-tree WebKit` means that Until Jan. 29th, 2022, the `Experimental MediaSource Inline Painting` option is only available in Safari Technology Preview

[Sam Sneddon [:gsnedders]]

<rdar://31763425>

[Wenson Hsieh]

Created attachment 457493 [details]
Patch

[Wenson Hsieh]

Comment on attachment 457493 [details]
Patch

Thanks for the review!

[EWS]

Committed r292811 (249593@main): <https://commits.webkit.org/249593@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 457493 [details].