---
title: Last compatible hint track version
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/hint_track_sample_description/last_compatible_hint_track_version
---

# Last compatible hint track version

A 16-bit unsigned integer indicating the oldest hint track version with which this hint track is backward-compatible.

## Overview

Overview If your application understands the hint track version specified by this field, it can work with this hint track.

## See Also

### Data fields

- [Size](quicktime-file-format/hint_track_sample_description/size.md)
- [Data format](quicktime-file-format/hint_track_sample_description/data_format.md)
- [Reserved](quicktime-file-format/hint_track_sample_description/reserved.md)
- [Data reference index](quicktime-file-format/hint_track_sample_description/data_reference_index.md)
- [Hint track version](quicktime-file-format/hint_track_sample_description/hint_track_version.md)
- [Max packet size](quicktime-file-format/hint_track_sample_description/max_packet_size.md)
- [Additional data table](quicktime-file-format/hint_track_sample_description/additional_data_table.md)