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Interestingly, Safari Tech Preview seems to work fine with WebM, and signals support for it.

Release Safari claims it can't play WebM, but the playback actually seems to work anyway.

Both WebM-related experimental options are enabled in Orion by default as far as I can see, but doesn't seem to have any impact.

    gp interesting, I can say from experience webm support does work in safari but it's pretty hit or miss (glitchy playback).

        Steps to reproduce:
        Go to https://www.webmproject.org/detect/
        WebM video will not play (in normal and compatibility mode)

        Expected behavior:
        WebM video plays. In Safari 15.2, even though the site responds that the video will not play, it does work.

        Orion, OS version; hardware type:
        Orion Version 0.99.110-beta (WebKit 613.1.12)
        MacOS 12.1
        MacBook Pro (M1 Pro)

        Image/Video:
        Left Safari, right Orion.

          Merged 2 posts from WebM videos not playing.

            gp Interesting, I do not get that?

            • gp replied to this.

                Even more strange is that regular Safari play the video.

                  Vlad

                  I seem to be on release 137 of STP

                      a year later

                      We have an update from WebKit team

                      Unfortunately the CoreMedia feature WebKit uses to add WebM support is disabled unless the framework is signed with an entitlement we can't use in open source builds.

                      https://bugs.webkit.org/show_bug.cgi?id=249982#c2

                      It is not clear why is Apple not allowing WebM for open source WebKit. Please feel free to post for clarification in WebKit.

                        6 months later

                        Is there any update on this? Safari plays webms perfectly now.

                        • Vlad replied to this.
                          5 months later

                          laiz Not for me on the Mojave version of 0.99.126.4.1.3-rc it seems:

                          Sorry. Your browser reports that it cannot play WebM Video. The browser responded with:

                          • canPlayType supported? No
                          • WebM video supported? N/A
                          • Vlad replied to this.

                              orionuser6651 webm support is handled on the macOS level, so Orion will support it where available

                                  2 months later
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