1477011 - canPlayType(video/mp4; codecs="vp9") returns ""

Status: RESOLVED FIXED

(Core :: Audio/Video: Playback, enhancement)

Description

[Jean-Yves Avenard [:jya]]

VP9 in mp4 is supported, yet canPlayType returns an empty string here.

Comment 1

[Jean-Yves Avenard [:jya]]

MediaSource.isTypeSupported("video/mp4; codecs="vp9") returns true however...

Comment 2

[Jean-Yves Avenard [:jya]]

This is due to https://searchfox.org/mozilla-central/source/dom/html/HTMLMediaElement.cpp#4803

    // We don't have a demuxer that can handle VP9 in non-fragmented MP4.
    // So special-case VP9 in MP4 here, as we assume canPlayType() implies
    // non-fragmented MP4 anyway. Note we report that we can play VP9
    // in MP4 in MediaSource.isTypeSupported(), as the fragmented MP4
    // demuxer can handle VP9 in fragmented MP4.

I don't think that assumption is still true now that we've switched to the rust mp4 demuxer

Comment 3

[Jean-Yves Avenard [:jya]]

Crafted https://raw.githubusercontent.com/jyavenard/htmltests/master/mediatest/mp4/bipbop_vp9.mp4

that shows that it plays.

Should remove that restriction...

Comment 4

[Jean-Yves Avenard [:jya]]

Attachment: Bug 1477011 - Report vp9 in mp4 as supported. r?dminor

Since we switched to the mp4 rust demuxer, VP9 in mp4 is always supported.

Comment 5

[Phabricator Automation]

Comment on attachment 8993591 [details]
Bug 1477011 - Report vp9 in mp4 as supported. r?dminor

Dan Minor [:dminor] has approved the revision.

https://phabricator.services.mozilla.com/D2261

Comment 6

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/afcfe1cd7c55
Report vp9 in mp4 as supported. r=dminor

Comment 7

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/afcfe1cd7c55