DocumentationAnalyticsStreaming media services guide

Bitrate change

Last update: May 28, 2026

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  • Developer

The bitrate change event signals that the player negotiated a new playback bitrate. Send it whenever the bitrate changes during playback. Include the new bitrate value in the QoE data so the backend can compute Average bitrate and the per-bitrate-bucket dimension.

Web SDK

Call sendEvent with eventType: "media.bitrateChange" and the new bitrate in qoeDataDetails:

code language-javascript 
alloy("sendEvent", {
  xdm: {
    eventType: "media.bitrateChange",
    mediaCollection: {
      qoeDataDetails: {
        bitrate: 3200,
        droppedFrames: 0,
        framesPerSecond: 24,
        timeToStart: 0
      },
      sessionID: "{sid}",
      playhead: 90
    }
  }
});
iOS

Create a QoE object with the new bitrate and update the tracker before the bitrate change event fires.

code language-swift 
let qoeObject = Media.createQoEObjectWith(bitrate: 3200,
                                       startupTime: 0,
                                               fps: 24,
                                     droppedFrames: 0)

tracker.updateQoEObject(qoe: qoeObject)
tracker.trackEvent(event: MediaEvent.BitrateChange, info: nil, metadata: nil)
Android

Create a QoE object with the new bitrate and update the tracker before the bitrate change event fires.

code language-kotlin 
val qoeObject = Media.createQoEObject(3200, 0, 24, 0)

tracker.updateQoEObject(qoeObject)
tracker.trackEvent(Media.Event.BitrateChange, null, null)
Roku

Call sendMediaEvent with eventType: "media.bitrateChange" and the new bitrate in qoeDataDetails:

code language-brightscript 
m.aepSdk.sendMediaEvent({
    "xdm": {
        "eventType": "media.bitrateChange",
        "mediaCollection": {
            "qoeDataDetails": {
                "bitrate": 3200,
                "droppedFrames": 0,
                "framesPerSecond": 24,
                "timeToStart": 0
            },
            "playhead": 90
        }
    }
})
Media Edge API

Call the bitrateChange endpoint with the new bitrate in qoeDataDetails:

code language-sh 
curl -X POST "https://edge.adobedc.net/ee/va/v1/bitrateChange?configId={datastreamID}" \
--header 'Content-Type: application/json' \
--data '{
  "events": [{
    "xdm": {
      "eventType": "media.bitrateChange",
      "mediaCollection": {
        "qoeDataDetails": {
          "bitrate": 3200
        },
        "sessionID": "{sid}",
        "playhead": 90
      },
      "timestamp": "YYYY-08-20T22:41:40+00:00"
    }
  }]
}'

Legacy implementation types (Analytics-only)

Media SDK JS 3.x

Create a QoE object with the new bitrate and update the tracker:

code language-javascript 
var qoeObject = ADB.Media.createQoEObject(
  3200,  // bitrate (kbps)
  0,     // startup time (ms)
  24,    // fps
  0      // dropped frames
);

tracker.updateQoEObject(qoeObject);
tracker.trackEvent(ADB.Media.Event.BitrateChange);
Chromecast

Update the QoS object returned by the getQoSObject delegate, then track the event:

code language-javascript 
// Update QoS data via the delegate
this._qosInfo = ADBMobile.media.createQoSObject(
  3200,  // bitrate (kbps)
  0,     // dropped frames
  24,    // fps
  0      // startup time
);

ADBMobile.media.trackEvent(ADBMobile.media.Event.BitrateChange);
Media Collection API

Send a bitrateChange POST to the events endpoint with the new bitrate in qoeData:

code language-json 
{
  "playerTime": { "playhead": 90, "ts": 1699523820000 },
  "eventType": "bitrateChange",
  "qoeData": {
    "media.qoe.bitrate": 3200
  }
}
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