LibAVQt

An object-oriented Qt interface for FFmpeg.

Features

Current

• VAAPI, QSV, DXVA2 accelerated decode
• VAAPI accelerated encode (WIP)
• Frame sink for saving every n-th frame to file
• QOpenGLWidget based renderer
• OpenAL based audio output (unstable)

Planned

• Reliable API Reference
• Audio encode
• Other hardware accelerations (NVDEC/NVENC, AMF, VDPAU, MMAL)
• Frame filters for e.g. scaling or color <-> greyscale
• Other renderers (e.g. QWidget, QGraphicsItem)
• CMake module

Build from source

Prequisites

• CMake
• C++ Development environment
• Vulkan + headers (In Qt6, QML defaults to Vulkan instead of OpenGL for rendering)
• Correctly configured Qt 5.15 installation
  • for linux distributions with Qt 5.15 in the package repositories, just install it with your distributions package manager
  • for linux distributions without Qt 5.15 in the repositories, Windows and macOS, use the installer from the Qt website: (you have to create an Qt account in order to install Qt): https://www.qt.io/download-qt-installer

Clone the repo

git clone https://edugit.org/sdcieo0330/LibAVQt.git
cd LibAVQt

Run CMake and build

mkdir build && cd build
cmake ..
cmake --build . -j4

Use with CMake

Add the following lines to your CMakeLists.txt (the <path> must be replaced with the path to the cloned repository):

include_directories(<path>)
link_directories(<path>/build/AVQt)

Dynamic link:

target_link_libraries(<target-name> AVQt)

Static link:

target_link_libraries(<target-name> AVQt_static)

Examples

A simple example for displaying video with the OpenGLRenderer and OpenALAudioOutput can be found in main.cpp. It will be compiled along with the library by the commands above.

Run the example

In your build directory, run the example by:

./Player