Hi The code is now in central and in the last nightly.
It's currently disabled by default behind the pref media.media-capabilities.enabled The bug tracking fingerprinting concerns is done in https://bugzilla.mozilla.org/show_bug.cgi?id=1461454 Feel free to enable it and watch videos in YouTube. On mac in particular it would allow to re-enable the free vp9 codec (which has been disabled due to performance reason) Kind regards Jean-Yves On Mon, May 14, 2018 at 5:19 PM, Jean-Yves Avenard <[email protected]> wrote: > Media Capabilities allow for web sites to better determine what content to > serve to the end user. > Currently a media element offers the canPlayType method ( > https://html.spec.whatwg.org/multipage/media.html#dom- > navigator-canplaytype-dev) to determine if a container/codec can be used. > But the answer is limited as a maybe/probably type answer. > > It gives no ability to determine if a particular resolution can be played > well/smoothly enough or be done in a power efficient manner (e.g. will it > be hardware accelerated). > > This has been a particular problem with sites such as YouTube that serves > VP9 under all circumstances even if the user agent won't play it well (VP9 > is mostly done via software decoding and is CPU itensive). This has forced > us to indiscriminately disable VP9 altogether). > For YouTube to know that VP9 could be used for low resolution but not > high-def ones would allow them to select the right codec from the start. > > This issue is tracked in bugzilla 1409664 (https://bugzilla.mozilla.org/ > show_bug.cgi?id=1409664) > > The proposed spec is available at https://wicg.github.io/ > media-capabilities/ > > Chrome has shipped it a while ago now and talking to several partners > (including YouTube, Netflix, Facebook etc) , Media Capabilities support has > been the number one request. > > We intend to implement and ship this API very soon. > > Early comment and feedback will be welcome. > > Kinds regards > Jean-Yves > _______________________________________________ dev-platform mailing list [email protected] https://lists.mozilla.org/listinfo/dev-platform
