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# AVVideoCompositionValidationHandling

Methods you can implement to indicate whether validation of a video composition should continue after specific errors are found.

```
protocol AVVideoCompositionValidationHandling : NSObjectProtocol
```

## Overview

You might chose to stop validation after particular errors have been found so as to avoid unnecessary subsequent processing following an eror from which there is no suitable recovery.

## Topics

### Configuring validation methods

[`videoComposition(_:shouldContinueValidatingAfterFindingInvalidValueForKey:)`](/documentation/AVFoundation/AVVideoCompositionValidationHandling/videoComposition(_:shouldContinueValidatingAfterFindingInvalidValueForKey:))

Reports that a key that has an invalid value.

[`videoComposition(_:shouldContinueValidatingAfterFindingEmptyTimeRange:)`](/documentation/AVFoundation/AVVideoCompositionValidationHandling/videoComposition(_:shouldContinueValidatingAfterFindingEmptyTimeRange:))

Reports a time range that has no corresponding video composition instruction.

[`videoComposition(_:shouldContinueValidatingAfterFindingInvalidTimeRangeIn:)`](/documentation/AVFoundation/AVVideoCompositionValidationHandling/videoComposition(_:shouldContinueValidatingAfterFindingInvalidTimeRangeIn:))

Reports a video composition instruction with a time range that is invalid.

[`videoComposition(_:shouldContinueValidatingAfterFindingInvalidTrackIDIn:layerInstruction:asset:)`](/documentation/AVFoundation/AVVideoCompositionValidationHandling/videoComposition(_:shouldContinueValidatingAfterFindingInvalidTrackIDIn:layerInstruction:asset:))

Reports a video composition layer instruction that does not correspond to the track ID used for the composition’s animation or to a track of the asset.


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