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 Quality The definition of 'VideoPlaybackQuality.totalVideoFrames' in that specification. |
Editor's Draft | Initial definition. |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
totalVideoFrames | 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 for constructing and returning this interface.