javascript - MediaStream Unhandled Promise Rejection: [object DOMError] (in Safari 11) -


i getting unhandled promise rejection in safari tech preview 11 in method below initialize webrtc. specifically, occurs when assign mediastream video element this: video.srcobject = event.stream; - stack trace shows line 1 threw exception. have not been able catch exception using try/catch.

the exception occurring in safari 11 (does not occur in chrome).

here method:

initwebrtc(p){     var self = this;     return new promise((resolve, reject) => {        self.state.connection = new rtcmulticonnection();       self.state.connection.socketmessageevent = 'webrtc-firebase';       self.state.connection.setcustomsockethandler(firebaseconnection);       self.state.connection.firebase = 'webrtc-firebase';        self.state.connection.enablefilesharing = true;        self.state.connection.session = {         audio: true,         video: true,         data: true       };       self.state.connection.sdpconstraints.mandatory = {         offertoreceiveaudio: true,         offertoreceivevideo: true       };       self.state.connection.onstream = function(event) {           console.log('event.mediaelement',event.mediaelement);           console.log('event.stream',event.stream);            var videocontainer = document.getelementbyid('videocontainer');           var video = event.mediaelement;           if (!window.safari){             var source = document.createelement("source");             source.srcobject = event.stream;             video.appendchild(source);           } else { // safari             try{               video.srcobject = event.stream; // line throws exception             }catch(e){ //unable catch exception               console.log('exception',e);             }           }           videocontainer.appendchild(video);            var playpromise = video.play();           if (playpromise !== undefined) { // not promise in browsers             playpromise.catch(function(error) {             });           }           settimeout(function() {             var playpromise = video.play();             if (playpromise !== undefined) {               playpromise.catch(function(error) {               });             }           }, 5000);       };       resolve();     });   }

not sure if helps, here trace:

[error] unhandled promise rejection: [object domerror]     (anonymous function)     rejectpromise     onstream (index.js:5787) // video.srcobject = event.stream; line     (anonymous function) (rtcmulticonnection.js:4092)     getrmcmediaelement (rtcmulticonnection.js:1113)     ongettinglocalmedia (rtcmulticonnection.js:4064)     ongettinglocalmedia (rtcmulticonnection.js:4984)     streaming (rtcmulticonnection.js:3289)     (anonymous function) (rtcmulticonnection.js:3358)     promisereactionjob

any appreciated. thanks!

safari 11 blocks autoplay video sound default (source).

i believe video element comes autoplay attribute. when set srcobject it, try play video -- , got blocked safari. that's why see error.

you can try remove autoplay video element, may able catch in playpromise.catch.


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