Nova Flow OS
Qt6 QML Book
Qt6 QML Book
  • Qt6 QML Book
    • Preface
      • Welcome!
      • Acknowledgements
      • Authors
    • Meet Qt
      • Qt and Qt Quick
      • Qt Building Blocks
      • Qt 6 Introduction
    • Getting Started
      • Quick Start
      • Installing Qt 6 SDK
      • Hello World
      • Application Types
      • Summary
    • Qt Creator IDE
      • Qt Creator IDE
      • The User Interface
      • Registering your Qt Kit
      • Managing Projects
      • Using the Editor
      • Locator
      • Debugging
      • Shortcuts
    • Quick Starter
      • Quick Starter
      • QML Syntax
      • Core Elements
      • Components
      • Simple Transformations
      • Positioning Elements
      • Layout Items
      • Input Elements
      • Advanced Techniques
    • Fluid Elements
      • Fluid Elements
      • Animations
      • States and Transitions
      • Advanced Techniques
    • Qt Quick Controls
      • UI Controls
      • Introduction to Controls
      • An Image Viewer
      • Common Patterns
      • The Imagine Style
      • Summary
    • Model View
      • Model View-Delegate
      • Concept
      • Basic Models
      • Dynamic Views
      • Delegate
      • Advanced Techniques
      • Summary
    • Canvas
      • Canvas Element
      • Convenience API
      • Gradients
      • Shadows
      • Images
      • Transformation
      • Composition Modes
      • Pixel Buffers
      • Canvas Paint
      • Porting from HTML5 Canvas
    • Shapes
      • Shapes
      • A Basic Shape
      • Building Paths
      • Filling Shapes
      • Animating Shapes
      • Summary
    • Effects
      • Effects in QML
      • Particle Concept
      • Simple Simulation
      • Particle Parameters
      • Directed Particles
      • Affecting Particles
      • Particle Groups
      • Particle Painters
      • Graphics Shaders
      • Shader Elements
      • Fragment Shaders
      • Wave Effect
      • Vertex Shader
      • Curtain Effect
      • Summary
    • Multimedia
      • Multimedia
      • Playing Media
      • Sound Effects
      • Video Streams
      • Capturing Images
      • Summary
    • Qt Quick 3D
      • Qt Quick 3D
      • The Basics
      • Working with Assets
      • Materials and Light
      • Animations
      • Mixing 2D and 3D Contents
      • Summary
    • Networking
      • Networking
      • Serving UI via HTTP
      • Templates
      • HTTP Requests
      • Local files
      • REST API
      • Authentication using OAuth
      • Web Sockets
      • Summary
    • Storage
      • Storage
      • Settings
      • Local Storage - SQL
    • Dynamic QML
      • Dynamic QML
      • Loading Components Dynamically
      • Creating and Destroying Objects
      • Tracking Dynamic Objects
      • Summary
    • Javascript
      • JavaScript
      • Browser/HTML vs Qt Quick/QML
      • JS Language
      • JS Objects
      • Creating a JS Console
    • Qt C++
      • Qt and C++
      • A Boilerplate Application
      • The QObject
      • Build Systems
      • Common Qt Classes
      • Models in C++
    • Extending QML
      • Extending QML with C++
      • Understanding the QML Run-time
      • Plugin Content
      • Creating the plugin
      • FileIO Implementation
      • Using FileIO
      • Summary
    • Qt for Python
      • Qt for Python
      • Introduction
      • Installing
      • Building an Application
      • Limitations
      • Summary
    • Qt for MCUs
      • Qt for MCUs
      • Setup
      • Hello World - for MCUs
      • Integrating with C++
      • Working with Models
      • Summary
    • About
      • Readme
      • License
Powered by GitBook
On this page
  1. Qt6 QML Book
  2. Multimedia

Video Streams

The VideoOutput element is not limited to be used in combination with a MediaPlayer element. It can also be used with various video sources to display video streams.

For instance, we can use the VideoOutput to display the live video stream of the user's Camera. To do so, we will combine it with two components: Camera and CaptureSession.

import QtQuick
import QtMultimedia

Window {
    width: 1024
    height: 768
    visible: true

    CaptureSession {
        id: captureSession
        camera: Camera {}
        videoOutput: output
    }

    VideoOutput {
        id: output
        anchors.fill: parent
    }

    Component.onCompleted: captureSession.camera.start()
}

The CaptureSession component provides a simple way to read a camera stream, capture still images or record videos.

CaptureSession {
    id: captureSession
    camera: Camera {}
    videoOutput: output
}

As the MediaPlayer component, the CaptureSession element provides a videoOuput attribute. We can thus use this attribute to configure our own visual component.

Finally, when the application is loaded, we can start the camera recording:

Component.onCompleted: captureSession.camera.start()

Depending on your operating system, this application may require sensitive access permission(s). If you run this sample application using the qml binary, those permissions will be requested automatically.

However, if you run it as an independant program you may need to request those permissions first (e.g.: under MacOS, you would need a dedicated .plist file bundled with your application).

PreviousSound EffectsNextCapturing Images

Last updated 9 months ago