How to use libONVIF with QML for a camera app?

Integrate libONVIF classes into your QML project by exposing them via C++ context, and refer to the ONVIFMonitor example project for practical patterns on handling discovery and streaming.

libONVIF vs direct gSOAP for ONVIF development?

libONVIF abstracts gSOAP complexities and adds Qt integration, speeding up development for Qt apps, but direct gSOAP offers more low-level control and flexibility for non-Qt or custom implementations.

Does libONVIF support ONVIF Profile S for streaming?

Yes, it implements media and media2 services that cover streaming aspects of Profile S, but you should verify compatibility with specific camera models as ONVIF standards can vary.

How to handle PTZ control with libONVIF?

Use the OnvifPtzClient class to send commands for pan, tilt, and zoom, leveraging the RAII wrappers for request objects to manage memory safely in multithreaded setups.

Can I build libONVIF for Android without Qt?

No, Qt is a core dependency, so you need Qt for Android configured; the library's cross-platform support includes Android, but it mandates Qt's presence on the target.

What are the performance implications of libONVIF?

The abstraction over gSOAP may add slight overhead, but for most surveillance applications, the convenience and thread safety outweigh this, especially in Qt environments.

Open-Awesome

libONVIF

GPL-3.0C++

A C++ library providing high-level Qt-based client classes for ONVIF IP camera communication, abstracting gSOAP complexity.

GitHub

202 stars54 forks0 contributors

What is libONVIF?

libONVIF is a C++ library that provides client-side implementation of the ONVIF standard for communicating with IP-based security cameras and devices. It abstracts the low-level gSOAP protocol details into high-level, Qt-integrated classes, solving the problem of complex ONVIF integration in applications that need to control or monitor surveillance systems.

Target Audience

Developers building applications for IP camera management, video surveillance systems, or IoT security products who need to interact with ONVIF-compliant devices using C++ and Qt.

Value Proposition

Developers choose libONVIF because it offers a simplified, thread-safe abstraction over gSOAP with Qt-native classes, reducing the boilerplate and complexity typically associated with ONVIF implementations while supporting multiple services and platforms.

Overview

Yet another ONVIF library

Use Cases

Best For

Building desktop applications for IP camera configuration and monitoring
Integrating ONVIF camera control into Qt or QML-based projects
Developing cross-platform surveillance software for Linux, Windows, macOS, or Android
Implementing multi-camera PTZ (pan-tilt-zoom) control systems
Creating tools for ONVIF device discovery and event handling
Adding standardized video streaming and analytics to security applications

Not Ideal For

Projects not using Qt or planning to adopt a different GUI framework
Developers needing server-side ONVIF implementation for camera emulation or services
Teams requiring minimal dependencies or lightweight solutions without the Qt ecosystem overhead
Applications written in languages other than C++ or needing language-agnostic APIs

Pros & Cons

Pros

Comprehensive Service Support

Implements eleven ONVIF client services including device, media, PTZ, and analytics, covering most common surveillance camera interactions as listed in the README.

Seamless Qt Integration

Provides Qt-friendly classes and utilities, making it straightforward to integrate ONVIF functionality into Qt or QML applications without dealing with low-level gSOAP details.

Thread-Safe Architecture

Designed for multithreaded environments, ensuring reliable operation in applications handling multiple camera streams or concurrent requests, as emphasized in the design thoughts.

Automated Memory Management

Uses RAII wrappers for request and response objects, automating memory handling and reducing the risk of leaks, which simplifies code maintenance.

Cons

Qt Lock-In

Tightly coupled with Qt, forcing this dependency even for non-GUI components, which can be restrictive for projects not already using or unwilling to adopt Qt.

Client-Side Only

Only implements client-side services, so it cannot be used to build ONVIF servers or simulate camera devices, limiting its utility in full-stack surveillance systems.

Sparse In-Depth Documentation

Relies heavily on external resources like the ONVIF programmer's guide and example projects, with no comprehensive built-in documentation, making onboarding more challenging.

Frequently Asked Questions

Related Projects

stb

stb single-file public domain libraries for C/C++

Stars34,612

Forks8,088

Last commit1 month ago

{fmt}

A modern formatting library

Stars25,655

Forks3,045

Last commit13 hours ago

xxHash

Extremely fast non-cryptographic hash algorithm

Stars11,242

Forks914