Detect when HTML5 audio stream started playing or failed to load

I'm working on an application audio streaming using the HTML5 and webkit browser. I created an audio stream using code similar to the following:

var = new Audio audio
audio.setAttribute ("src", "url of feed to play here");
audio. Play();

I would like to be able to tell the user:

(1) when the feed was loaded and gets ready to play. This is because the stream can take a long time to load and I want to inform the user that the application works.

(2) when a feed failed to load. If the flow is interrupted for some reason, I wish to inform the user that something did not.

Does anyone have any ideas on how I can do this?

There are a lot of events and properties on the media items. For example, you can add an event handler for the 'mistake' to detect if the load fails. The 'loadeddata' event is raised when data is actually down. There is also an event of 'progress', but I have not much used. There is an event of 'game '.

I'd be a little careful about the assumptions of State - for example I would not be surprised if the press started playing before being fully charged. Seems to me the type of optimization that someone might throw together

So I threw the following test code.

appstart = function() {
    var main = document.getElementById("main");

    var b = document.createElement("button");
    var t = document.createElement("div");
    var a = document.createElement("audio");
    b.innerHTML = "Play";
    b.addEventListener("click", function() {
        a.addEventListener("timeupdate", function() {
            t.innerHTML += "Played "+a.currentTime+" of " + a.duration + "";
        });
        a.addEventListener("progress", function() {
            t.innerHTML += "Progress";
        });
        a.addEventListener("load", function() {
            t.innerHTML += "Load";
        });
        a.addEventListener("error", function() {
            t.innerHTML += "Error";
        });
        a.addEventListener("playing", function() {
            t.innerHTML += "Playing";
        });
        a.addEventListener("stalled", function() {
            t.innerHTML += "Stalled";
        });
        a.addEventListener("loadeddata", function() {
            t.innerHTML += "Loaded";
        });
        a.src="long.mp3";
        a.play();
    },0);
    main.appendChild(a);
    main.appendChild(b);
    main.appendChild(t);
};

window.addEventListener("load", appstart, 0);

Tags: BlackBerry Developers

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Detect when HTML5 audio stream started playing or failed to load

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