VideoPlaybackQuality: droppedVideoFrames property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since February 2020.

The read-only droppedVideoFrames property of the VideoPlaybackQuality interface returns the number of video frames which have been dropped rather than being displayed since the last time the media was loaded into the HTMLVideoElement.

Value

An unsigned 64-bit value indicating the number of frames that have been dropped since the last time the media in the <video> element was loaded or reloaded. This information can be used to determine whether or not to downgrade the video stream to avoid dropping frames.

Frames are typically dropped either before or after decoding them, when it's determined that it will not be possible to draw them to the screen at the correct time.

Examples

This example calls getVideoPlaybackQuality() to obtain a VideoPlaybackQuality object, then determines what percentage of frames have been dropped. That value is then presented in an element for the user's reference.

js
const videoElem = document.getElementById("my_vid");
const percentElem = document.getElementById("percent");
const quality = videoElem.getVideoPlaybackQuality();

const dropPercent =
  (quality.droppedVideoFrames / quality.totalVideoFrames) * 100;
percentElem.innerText = Math.trunc(dropPercent).toString(10);

Specifications

Specification
Media Playback Quality
# dom-videoplaybackquality-droppedvideoframes

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
droppedVideoFrames

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

See also