1035622 - MediaSource decoder creation ignores codec prefs such as media.webm.enabled

Status: RESOLVED WORKSFORME

(Core :: Audio/Video, defect)

Description

[Matthew Gregan [:kinetik]]

MediaSource's CanPlayType should check the appropriate prefs.

Comment 1

[avada]

Cool. Will there be separate ones for vp8/vp9 now that both's supported?
Disabling VP9 only makes a lot of sense for older PCs.

Comment 2

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

(In reply to avada from comment #1)
> Cool. Will there be separate ones for vp8/vp9 now that both's supported?
> Disabling VP9 only makes a lot of sense for older PCs.

There aren't going to be separate VP8/VP9 preferences.

I tried setting media.webm.enabled false and it showed a different result on:

https://www.youtube.com/html5

It also stops using VP9 on YouTube. Looks to me like we don't have an issue.

Comment 3

[avada]

(In reply to Anthony Jones (:kentuckyfriedtakahe, :k17e) from comment #2)
> (In reply to avada from comment #1)
> > Cool. Will there be separate ones for vp8/vp9 now that both's supported?
> > Disabling VP9 only makes a lot of sense for older PCs.
> 
> There aren't going to be separate VP8/VP9 preferences.

Well, that's probably not an issue since now can disable VP9, and as long as we have AVC, which is better anyways.

> I tried setting media.webm.enabled false and it showed a different result on:
> 
> https://www.youtube.com/html5
> 
> It also stops using VP9 on YouTube. Looks to me like we don't have an issue.

Although something is not right with the results. Youtube shows MSE & H.264 to be disabled even if "media.mediasource.mp4.enabled" is true.

Comment 4

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

The MSE/MP4 check is checking for "video/mp4; codecs="avc1.4d404f" which we report we don't support.