---
title: "QuickTime VR sample description ('qtvr')"
framework: QuickTime File Format
role: symbol
role_heading: Atom
path: quicktime-file-format/quicktime_vr_sample_description
---

# QuickTime VR sample description ('qtvr')

Describe QuickTime VR samples.

## Overview

Overview Whereas the QuickTime VR media sample is simply the node information itself, all sample descriptions are required by QuickTime to have a certain structure for the first several bytes. The structure for the QuickTime VR sample description is as follows: typedef struct QTVRSampleDescription {     UInt32                              size;     UInt32                              type;     UInt32                              reserved1;     UInt16                              reserved2;     UInt16                              dataRefIndex;     UInt32                              data; } QTVRSampleDescription, *QTVRSampleDescriptionPtr, **QTVRSampleDescriptionHandle;

## Topics

### Data fields

- [size](quicktime-file-format/quicktime_vr_sample_description/size.md)
- [type](quicktime-file-format/quicktime_vr_sample_description/type.md)
- [reserved1](quicktime-file-format/quicktime_vr_sample_description/reserved1.md)
- [reserved2](quicktime-file-format/quicktime_vr_sample_description/reserved2.md)
- [dataRefIndex](quicktime-file-format/quicktime_vr_sample_description/datarefindex.md)
- [data](quicktime-file-format/quicktime_vr_sample_description/data.md)