---
title: VTRAWProcessingOutputHandler
framework: Video Toolbox
role: symbol
role_heading: Type Alias
platforms: [macOS 15.0+]
path: videotoolbox/vtrawprocessingoutputhandler
---

# VTRAWProcessingOutputHandler

A block the system calls when frame processing is complete.

## Declaration

```occ
typedef void (^)(int, struct __CVBuffer *) VTRAWProcessingOutputHandler;
```

## Discussion

Discussion On successful processing, will return a CVPixelBuffer conforming to the session’s outputPixelBufferAttributes if any were provided.

## See Also

### Data types

- [VTRAWProcessingSession](videotoolbox/vtrawprocessingsession.md)
- [VTRAWProcessingParameterChangeHandler](videotoolbox/vtrawprocessingparameterchangehandler.md)
- [VTRAWProcessingSessionSetParameterChangedHander](videotoolbox/vtrawprocessingsessionsetparameterchangedhander.md)