[Webkit-unassigned] [Bug 235287] New: MediaSession coordinator setTrack API not works

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=235287

            Bug ID: 235287
           Summary: MediaSession coordinator setTrack API not works
           Product: WebKit
           Version: Safari 15
          Hardware: Mac (Intel)
                OS: macOS 12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cammy.tang at neulion.com.cn

Issue:
When Shareplay between macOS safari and iOS native APP, Can't receive "settrack" action from native APP, also can't receive from our own website.

Sample Code in our website:
//Action handlers
 navigator.mediaSession.setActionHandler('play', () => {//work
        player.play(); 
});
navigator.mediaSession.setActionHandler('pause', () => {//work
        player.pause();
});
navigator.mediaSession.setActionHandler('settrack', (details) => {//NOT work
        const nextVideo = details.trackIdentifier;
        playNext(nextVideo);
});

//produce setTrack action when user click next item.
 navigator.mediaSession.coordinator.setTrack(playing.seoName);


Business scene:
When user switch video A to video B on Safari,we intend to produce action 'setTrack' to inform iOS APP to sync switch. Otherwise,if user switch on APP, we receive and handle "settrack" action to sync on our website.

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