---
title: "Input type atom ('  ty')"
framework: quicktime-file-format
role: symbol
role_heading: Atom
path: quicktime-file-format/input_type_atom
---

# Input type atom ('  ty')

An atom that specifies how to interpret track input data.

## Overview

Overview The input type atom is required; it specifies how the data is to be interpreted.

## Topics

### Data fields

- [Size](quicktime-file-format/input_type_atom/size.md)
- [Type](quicktime-file-format/input_type_atom/type.md)
- [Input type](quicktime-file-format/input_type_atom/input_type.md)

## See Also

### Atoms for track input

- [Track input map atom ('imap')](quicktime-file-format/track_input_map_atom.md)
- [Track input atom ('  in')](quicktime-file-format/track_input_atom.md)
- [Object ID atom ('obid')](quicktime-file-format/object_id_atom.md)