No Viewfinder Available While Trying To Display Webcam With Pyside2

I am working on Ubuntu 20.04 with Python3 and PySide2, Qt is version 5. I wrote this simple Python script in order to test the ability to save webcam video for a larger project I w

Solution 1:

QCamera needs a QCameraViewfinder which is a widget that allows to display the information captured by QCamera, so you cannot pass a QFrame to it.

import sys

from PySide2.QtWidgets import QApplication, QMainWindow
from PySide2.QtMultimedia import QCamera, QCameraInfo
from PySide2.QtMultimediaWidgets import QCameraViewfinder

from MainWindow import Ui_MainWindow


class MainWindow(QMainWindow, Ui_MainWindow):
    def __init__(self, *args, **kwargs):
        super(MainWindow, self).__init__(*args, **kwargs)
        self.setupUi(self)
        for info in QCameraInfo.availableCameras():
            self.camera_combobox.addItem(info.description(), info)
        self.connect_btn.clicked.connect(self.connect_btn_clicked)

        self.view_finder = QCameraViewfinder()
        self.frame.layout().addWidget(self.view_finder)

    def connect_btn_clicked(self):
        info = self.camera_combobox.currentData()
        self.camera = QCamera(info)
        self.camera.setViewfinder(self.view_finder)
        self.camera.start()


app = QApplication(sys.argv)
window = MainWindow()
window.show()
app.exec_()