Re: Watching HTML5 video on GNU Guix?

[Maxim Cournoyer <maxim.cournoyer@gmail.com>]

Hello Znavko,

znavko@disroot.org writes:

> ffmpeg was installed:
>

[...]

> Those two video are working (cause youtube had converted them, I think).
>
> On the other videos that are not displaying and often this is live streams (I think, youtube did not converted them to acceptable format)
> these Javascript warnings with WebGL errors appear in terminal:
>
> https://www.youtube.com/watch?v=9K26GI4C3uY
>
> $ icecat
> JavaScript error: resource:///modules/sessionstore/SessionStore.jsm, line 1325: uncaught exception: 2147746065
> JavaScript warning: https://mail.disroot.org/rainloop/v/1.12.1/static/js/min/openpgp.min.js, line 0: Successfully compiled asm.js code (total compilation time 94ms)
> JavaScript warning: https://mail.disroot.org/rainloop/v/1.12.1/static/js/min/openpgp.min.js, line 0: Successfully compiled asm.js code (total compilation time 7ms)
> JavaScript warning: https://mail.disroot.org/rainloop/v/1.12.1/static/js/min/openpgp.min.js, line 0: Successfully compiled asm.js code (total compilation time 2ms)
> console.warn: LoginRecipes: "getRecipes: falling back to a synchronous message for:" "https://www.youtube.com"
> JavaScript warning: https://www.youtube.com/yts/jsbin/player_ias-vfl22ubNH/ru_RU/base.js, line 5359: Error: WebGL warning: getContext: Disallowing antialiased backbuffers due to blacklisting.
> JavaScript warning: https://www.youtube.com/yts/jsbin/player_ias-vfl22ubNH/ru_RU/base.js, line 5359: Error: WebGL warning: <SetDimensions>: Failed to create WebGL context: WebGL is currently disabled.
> JavaScript warning: https://www.youtube.com/yts/jsbin/player_ias-vfl22ubNH/ru_RU/base.js, line 5359: Error: WebGL warning: getContext: Disallowing antialiased backbuffers due to blacklisting.
> JavaScript warning: https://www.youtube.com/yts/jsbin/player_ias-vfl22ubNH/ru_RU/base.js, line 5359: Error: WebGL warning: <SetDimensions>: Failed to create WebGL context: WebGL is currently disabled.
> JavaScript warning: https://www.youtube.com/yts/jsbin/player_ias-vfl22ubNH/ru_RU/base.js, line 5359: Error: WebGL warning: getContext: Disallowing antialiased backbuffers due to blacklisting.
> JavaScript warning: https://www.youtube.com/yts/jsbin/player_ias-vfl22ubNH/ru_RU/base.js, line 5359: Error: WebGL warning: <SetDimensions>: Failed to create WebGL context: WebGL is currently disabled.
>
>
> Icecat console displays:
> Error: WebGL warning: getContext: Disallowing antialiased backbuffers due to blacklisting. base.js:5359:276
> Error: WebGL warning: <SetDimensions>: Failed to create WebGL context: WebGL is currently disabled. base.js:5359:276
> Blocked https://www.youtube.com/watch?v=9K26GI4C3uY from extracting canvas data because no user input was detected. base.js:2900:157
>
> and many ties this:
> Request to access cookie or storage on
> “https://i.ytimg.com/vi/sfw1IB58HYA/hqdefault.jpg?sqp=-oaymwE…qpAwsIARUAAIhCGAFwAQ==&rs=AOn4CLDPtI4kQ5jl0Nq6M8f7wUF2sjlv6g”
> was blocked because we are blocking all third-party storage access
> requests and content blocking is enabled.

I can reproduce the problem; it seems that WebGL is now a required by
youtube when using Icecat 68? That's strange because the same video
plays fine in an older version of Icecat (but I have to reload the page
to get it playing).

Anyway, the problem seems to have more to do with Youtube than HTML5
playback in Icecat.  A random HTML5 video playback test site [0] may
help to convince you of such :-)

You could try enabling WebGL in your Icecat (disabled by default) by
visiting the "IceCat-specific privacy settings" of the Settings page and
checking "Enable WebGL".  That didn't work for me, as my driver seems
blacklisted by Mozilla.  I tried force enabling it with suggestions from
this page [1] but your link would still wouldn't be happy with my WebGL
support.

HTH,

Maxim

[0]  https://tekeye.uk/html/html5-video-test-page
[1]  https://developer.mozilla.org/en-US/docs/Mozilla/QA/Graphics_Blocklisting