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# VST Replay Stream Management API

This page provides API reference for the VST Replay Stream Service.

## Overview

The Replay Stream service is designed to facilitate the replay or recorded streaming of sensors. This service encompasses recorded video streaming capabilities with comprehensive control and monitoring features.

## Key Features

The service provides the following capabilities:

* **Recorded Streaming**: Recorded streaming of sensors using WebRTC protocol
* **Listing Recorded Streams**: The list of available recorded streams can be queried
* **Snapshot Capturing**: Ability to capture snapshot or picture of a recorded stream
* **Recorded Stream Monitoring**: Real-time status update for the recorded stream
* **Trick Modes Support**: Various trick modes can be performed on the recorded stream like fast forward, rewind, seek +10, seek -10, play and pause
* **Performance Analytics**: Ability to get stats for recorded stream to measure performance
* **Stream Operations**: The stream supports various operations like querying the stream to get the current position and metadata of stream

## Base URL

The API is available at:

* **REST API**: `https://localhost/api`

All API endpoints are prefixed with `/v1/replay`.

## Authentication

The VST Replay Stream Management API uses optional bearer token authentication for endpoints that modify stream configuration or perform operations. GET requests typically do not require authentication.

> **Note**
>
> Endpoints that require authentication are marked with a security requirement in the API specification.

## Reference

Refer to the [VST Replay Stream Management API Reference](/system-components/middleware/video-io-storage-vios/vst-api-reference/vst-replay-stream-management-api/vst-replay-stream-management-api-reference).

## Docs

- [VST Replay Stream Management API Reference](https://docs.nvidia.com/vss/dev/system-components/middleware/video-io-storage-vios/vst-api-reference/vst-replay-stream-management-api/vst-replay-stream-management-api-reference.md): The Replay Stream Service supports recorded sensor streaming using WebRTC, listing recorded streams, capturing snapshots, monitoring stream status in real time, playback controls (fast forward, rewind, seeking, play, and pause), performance statistics, and queries for stream position and metadata.