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# AVVideoPerformanceMetrics

An object that provides metrics related to video playback quality.

```
class AVVideoPerformanceMetrics
```

## Topics

### Inspecting metrics

[`numberOfCorruptedFrames`](/documentation/AVFoundation/AVVideoPerformanceMetrics/numberOfCorruptedFrames)

The total number of corrupted frames.

[`numberOfCorruptedVideoFrames`](/documentation/AVFoundation/AVVideoPerformanceMetrics/numberOfCorruptedVideoFrames)

[`numberOfDisplayCompositedVideoFrames`](/documentation/AVFoundation/AVVideoPerformanceMetrics/numberOfDisplayCompositedVideoFrames)

[`numberOfDroppedFrames`](/documentation/AVFoundation/AVVideoPerformanceMetrics/numberOfDroppedFrames)

The total number of frames the system drops prior to decoding or from missing the display deadline.

[`numberOfDroppedVideoFrames`](/documentation/AVFoundation/AVVideoPerformanceMetrics/numberOfDroppedVideoFrames)

[`numberOfFramesDisplayedUsingOptimizedCompositing`](/documentation/AVFoundation/AVVideoPerformanceMetrics/numberOfFramesDisplayedUsingOptimizedCompositing)

The total number of full screen frames rendered in a special power-efficient mode that didn’t require compositing with other UI elements.

[`numberOfNonDisplayCompositedVideoFrames`](/documentation/AVFoundation/AVVideoPerformanceMetrics/numberOfNonDisplayCompositedVideoFrames)

[`totalAccumulatedFrameDelay`](/documentation/AVFoundation/AVVideoPerformanceMetrics/totalAccumulatedFrameDelay)

The accumulated amount of time between the prescribed presentation times of displayed video frames and their actual time of display.

[`totalFrameDelay`](/documentation/AVFoundation/AVVideoPerformanceMetrics/totalFrameDelay)

[`totalNumberOfFrames`](/documentation/AVFoundation/AVVideoPerformanceMetrics/totalNumberOfFrames)

The total number of frames that display if no frames drop.

[`totalNumberOfVideoFrames`](/documentation/AVFoundation/AVVideoPerformanceMetrics/totalNumberOfVideoFrames)


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