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
.
Syntax
value = videoPlaybackQuality.droppedVideoFrames;
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.
Example
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.
var videoElem = document.getElementById("my_vid"); var percentElem = document.getElementById("percent"); var quality = videoElem.getVideoPlaybackQuality(); var dropPercent = (quality.droppedVideoFrames/quality.totalVideoFrames)*100; percentElem.innerText = Math.trunc(dropPercent).toString(10);
Specifications
Specification | Status | Comment |
---|---|---|
Media Playback Quality The definition of 'VideoPlaybackQuality.droppedVideoFrames' in that specification. |
Editor's Draft | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
droppedVideoFrames | Chrome Full support 23 | Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| 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.
See also
- The
HTMLVideoElement.getVideoPlaybackQuality()
method, which creates and returnsVideoPlaybackQuality
objects