---
title: kVTCompressionPropertyKey_CalculateMeanSquaredError
framework: videotoolbox
role: symbol
role_heading: Global Variable
path: videotoolbox/kvtcompressionpropertykey_calculatemeansquarederror
---

# kVTCompressionPropertyKey_CalculateMeanSquaredError

## Declaration

```swift
let kVTCompressionPropertyKey_CalculateMeanSquaredError: CFString
```

## See Also

### Quality Metrics

- [kVTSampleAttachmentKey_QualityMetrics](videotoolbox/kvtsampleattachmentkey_qualitymetrics.md)
- [kVTSampleAttachmentQualityMetricsKey_ChromaBlueMeanSquaredError](videotoolbox/kvtsampleattachmentqualitymetricskey_chromabluemeansquarederror.md)
- [kVTSampleAttachmentQualityMetricsKey_ChromaRedMeanSquaredError](videotoolbox/kvtsampleattachmentqualitymetricskey_chromaredmeansquarederror.md)
- [kVTSampleAttachmentQualityMetricsKey_LumaMeanSquaredError](videotoolbox/kvtsampleattachmentqualitymetricskey_lumameansquarederror.md)