---
title: "Track reference atom ('tref')"
framework: quicktime-file-format
role: symbol
role_heading: Atom
path: quicktime-file-format/track_reference_atom
---

# Track reference atom ('tref')

An atom that defines relationships between tracks.

## Mentioned in

Referencing a related forced subtitle track

## Topics

### Data fields

- [Size](quicktime-file-format/track_reference_atom/size.md)
- [Type](quicktime-file-format/track_reference_atom/type.md)
- [Track reference type atom](quicktime-file-format/track_reference_atom/track_reference_type_atom.md)

## See Also

### Atoms for track references

- [Track reference type atom](quicktime-file-format/track_reference_type_atom.md)