VideoPlaybackQuality: droppedVideoFrames property
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
BCD tables only load in the browser
See also
-
The
HTMLVideoElement.getVideoPlaybackQuality()
method, which creates and returnsVideoPlaybackQuality
objects