VideoPlaybackQuality: totalVideoFrames property
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.
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.
Examples
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.
js
const videoElem = document.getElementById("my_vid");
const 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 |
---|
Media Playback Quality # dom-videoplaybackquality-totalvideoframes |
Browser compatibility
BCD tables only load in the browser
See also
-
The
HTMLVideoElement.getVideoPlaybackQuality()
method for constructing and returning this interface.