---
title: numberOfDroppedFrames
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avvideoperformancemetrics/numberofdroppedframes
---

# numberOfDroppedFrames

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

## Declaration

```swift
var numberOfDroppedFrames: Int { get }
```

## See Also

### Inspecting metrics

- [numberOfCorruptedFrames](avfoundation/avvideoperformancemetrics/numberofcorruptedframes.md)
- [numberOfFramesDisplayedUsingOptimizedCompositing](avfoundation/avvideoperformancemetrics/numberofframesdisplayedusingoptimizedcompositing.md)
- [totalAccumulatedFrameDelay](avfoundation/avvideoperformancemetrics/totalaccumulatedframedelay.md)
- [totalNumberOfFrames](avfoundation/avvideoperformancemetrics/totalnumberofframes.md)