---
title: Relative packet transmission time
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/packet_entry/relative_packet_transmission_time
---

# Relative packet transmission time

A 32-bit signed integer value, indicating the time, in the hint track’s time scale, to send this packet relative to the hint sample’s actual time.

## Overview

Overview Negative values mean that the packet will be sent earlier than real time, which is useful for smoothing the data rate. Positive values are useful for repeating packets at later times. Within each hint sample track, each packet time stamp must be non-decreasing.

## See Also

### Data fields

- [RTP header info](quicktime-file-format/packet_entry/rtp_header_info.md)
- [RTP sequence number](quicktime-file-format/packet_entry/rtp_sequence_number.md)
- [Flags](quicktime-file-format/packet_entry/flags.md)
- [Entry count](quicktime-file-format/packet_entry/entry_count.md)
- [Extra information TLVs](quicktime-file-format/packet_entry/extra_information_tlvs.md)
- [Data table](quicktime-file-format/packet_entry/data_table.md)