1417087 - Cast / Chromecast support doesn't work with MSE

Status: RESOLVED INCOMPLETE

(Firefox for Android Graveyard :: Audio/Video, defect, P3)

Description

[Andreas Bovens [:abovens]]

1. Go to YouTube and play a video.

Expected:
Cast button appears in video UI.

Actual result:
Cast button does not appear in UI, and there is no other apparent way to initiate casting.

Comment 1

[James Willcox (:snorp) ([e-mail]) (he/him)]

It looks like this is only a problem if it's the first page on startup. We don't get the casting information in time when the page is loading and it's not updated after. Reloading the page will show the cast button on the video for me.

Comment 2

[James Willcox (:snorp) ([e-mail]) (he/him)]

NI to product folks for a priority

Comment 3

[Sylvestre Ledru [:Sylvestre]]

Is it a regression from 56? Thanks

Comment 4

[Andreas Bovens [:abovens]]

It works fine for me on http://camendesign.com/code/video_for_everybody/test.html but not on YouTube.

Comment 5

[James Willcox (:snorp) ([e-mail]) (he/him)]

YouTube uses MSE, so there isn't a source URL we can use to send to the Chromecast. Chrome appears to special case YouTube by launching their YouTube Chromecast app (or at least one that specifically supports YouTube).

Comment 7

[Paul Adenot (:padenot)]

Andreas, can we reevaluate the priority of this bug in the context of Fenix?

There are no silver bullet and it's going to be hard to implement this for the increasing number of websites that use MSE instead of normal HTTP playback (say, comment 4 vs youtube), but if we decide it's important, then we can maybe devise ways to make this smoother for users?

Comment 8

[Andreas Bovens [:abovens]]

We flagged Cast support earlier this week as a potential GeckoView/Fenix feature to look into in Q2 or later this year. Needs more cost/impact analysis though.

Just so I understand your concern — would it be possible to implement casting support for MSE content? Or would it be limited to HTTP only?

Comment 9

[Paul Adenot (:padenot)]

(In reply to Andreas Bovens [:abovens] from comment #8)

Just so I understand your concern — would it be possible to implement casting support for MSE content? Or would it be limited to HTTP only?

This is not possible, according to the documentation (but also it makes sense that it's not possible, just knowing how it works).

HLS or simple HTTP streaming work, and we implement both on Firefox for Android (and probably Fenix has something for HLS, but I'm not sure).

If we're willing to special case some origins (a bit like what comment 5 explains), then we can possibly do something smoother for users that want to use their Chromecast with Firefox products on Android.

Comment 10

[BMO Automation]

We have completed our launch of our new Firefox on Android. The development of the new versions use GitHub for issue tracking. If the bug report still reproduces in a current version of [Firefox on Android nightly](https://play.google.com/store/apps/details?id=org.mozilla.fenix) an issue can be reported at the [Fenix GitHub project](https://github.com/mozilla-mobile/fenix/). If you want to discuss your report please use [Mozilla's chat](https://wiki.mozilla.org/Matrix#Connect_to_Matrix) server https://chat.mozilla.org and join the [#fenix](https://chat.mozilla.org/#/room/#fenix:mozilla.org) channel.