Web/API/VideoPlaybackQuality/totalVideoFrames

The VideoPlaybackQuality interface's totalVideoFrames read-only property returns the total number of video frames that have been displayed or dropped since the media was loaded.

Syntax

value = videoPlaybackQuality.totalVideoFrames;

Value

The total number of frames that the <video> element has displayed or dropped since the media was loaded into it. Essentially, this is the number of frames the element would have presented had no problems occurred.

This value is reset when the media is reloaded or replaced.

Example

This example calls getVideoPlaybackQuality() to obtain a VideoPlaybackQuality object, then determines what percentage of frames have been lost by either corruption or being dropped. If that exceeds 10% (0.1), a function called lostFramesThresholdExceeded() is called to, perhaps, update a quality indicator to show an increase in frame loss.

var videoElem = document.getElementById("my_vid");
var quality = videoElem.getVideoPlaybackQuality();

if ((quality.corruptedVideoFrames + quality.droppedVideoFrames)/quality.totalVideoFrames > 0.1) {
  lostFramesThresholdExceeded();
}

A similar algorithm might be used to attempt to switch to a lower-resolution video that requires less bandwidth, in order to avoid dropping frames.

Specifications

Specification	Status	Comment
Media Playback QualityThe definition of 'VideoPlaybackQuality.totalVideoFrames' in that specification.	Editor's Draft	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`totalVideoFrames` Experimental'	Chrome Full support 23	Edge Full support 12	Firefox Full support 42 Full support 42 No support 25 — 42 Notes' Disabled' Notes' Limited support to an allowed list of sites, for example YouTube, Netflix, and other popular streaming sites. The limitation was removed when Media Source Extensions was enabled by default in Firefox 42. Disabled' From version 25 until version 42 (exclusive): this feature is behind the `media.mediasource.enabled` preference. To change preferences in Firefox, visit about:config.	IE Full support 11 Notes' Full support 11 Notes' Notes' Only works on Windows 8+.	Opera Full support 15	Safari Full support 8	WebView Android Full support 4.4.3	Chrome Android ?	Firefox Android No support No	Opera Android Full support 14	Safari iOS No support No	Samsung Internet Android ?

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.
See implementation notes.': See implementation notes.
User must explicitly enable this feature.': User must explicitly enable this feature.