Quality of service statistics

Last update: 2023-10-02

Quality of service (QoS) offers a detailed view into how the video engine is performing. Browser TVSDK provides detailed statistics about playback, buffering, and devices.

Read QOS playback, buffering, and device statistics

You can read playback, buffering, and device statistics from the QOSProvider class.

The QOSProvider class provides various statistics, including information about buffering, bit rates, frame rates, time data, and so on.

  1. Instantiate a media player.

  2. Create a QOSProvider object and attach it to the media player.

    // Create Media Player.qosProvider =
          new AdobePSDK.QOSProvider();
  3. (Optional) Read the playback statistics.

    One solution to read playback statistics is to have a timer, that periodically fetches the new QoS values from the QOSProvider. For example:

    var qosTimer = (function () {
        var ref = null,
        qosChangeInterval = 500, // in milliseconds
        startTimer = function () {
            var playbackInformation = qosProvider.playbackInformation;
         console.log("Frame rate", playbackInformation.frameRate);
            console.log ("Dropped frames", playbackInformation.droppedFrameCount);
            console.log ("Bitrate", playbackInformation.bitrate);
            console.log ("Buffering time", playbackInformation.bufferingTime);
            console.log ("Buffer length", playbackInformation.bufferLength);
            console.log ("Buffer time", playbackInformation.bufferTime);
            console.log ("Empty buffer count", playbackInformation.emptyBufferCount);
            console.log ("Time to load", playbackInformation.timeToLoad);
            console.log ("Time to start", playbackInformation.timeToStart);
            ref = window.setTimeout(startTimer, qosChangeInterval);
        return {
            start: function () {
                if (ref !== null) {
                    // don't start another timeout if one already exists.
            stop: function () {
                ref = null;
  4. (Optional) Read the device-specific information.

    // Show device information
    DeviceInformation deviceInfo = new QOSProvider().deviceInformation;
    console.log("OS: "+ deviceInfo.getOS());
    console.log("Width: "+ deviceInfo.getWidthPixels() +
                "Height: "+ deviceInfo.getHeightPixels() );

On this page