You can check the following references for further information:
- You can get an overview of the Qt Multimedia system and its capabilities at https://doc.qt.io/qt-5/multimediaoverview.html.
- The official PyQt QtMultimedia and QtMultimediaWidgets examples can be found at https://github.com/pyqt/examples/tree/master/multimedia and https://github.com/pyqt/examples/tree/master/multimediawidgets. They provide more example code of using PyQt for media capture and playback.