---
title: "FLV Cue Points"
slug: "flv-cue-points"
updated: 2023-08-08T20:35:24Z
published: 2023-08-08T20:35:24Z
canonical: "help.tritondigital.com/flv-cue-points"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.tritondigital.com/llms.txt
> Use this file to discover all available pages before exploring further.

# FLV Cue Points

In FLV streams, cue points are received via the normal Flash/FLV conventions, via an in-stream **onCuePoint** event. The cue point type is the cue point's name field, and all other attributes are sent as a flat list of key/value pairs in the cue point's parameters field.

Depending on the stream's configuration, cue points may be received in STWCue or AndoXML formats. See [Cue Point Formats](/v1/docs/advertising-specification-ad-triggers-cue-points#cue-point-formats) for details.

Players using a standard Flash implementation will hook to the **NetStream.onCuePoint** event to receive cue points. API details are documented here: [NetStream.onCuePoint (AS3 Reference)](http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/net/NetStream.html#event:onCuePoint).

Players decoding the FLV stream themselves (i.e., outside the Flash environment) can refer to the [FLV File Format Specification](http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf) for details.

In addition, the FLV transport supports an additional feature: **cue point previews**. This allows players to see upcoming cue points in order to fetch resources and prepare playback before the actual cue point. Cue point previews are sent via the non-standard **onCuePointPreview** and **onCuePointPreviewExpired** events. Not all cue points are "previewed" – only cue points that are deemed "expensive" to setup for playback (mostly, video mid-rolls).