I have a problem with pyqt6 type object 'QQuickImageProvider' has no attribute 'Image', how can I solve it?

JonB

@film
Count it be QQmlImageProviderBase.Image instead?

SGaist

Hi,

Which version of PySide6 are you using ?
Tested with 6.4.2 and 6.5.0 and it's working as expected.

Next time, please post your code as text so it's easier to use it for testing.

film

import sys
from PyQt6.QtCore import *
from PyQt6.QtGui import *
from PyQt6.QtQml import *
from PyQt6.QtQuick import *


class MyImageProvider(QQuickImageProvider):
    def __init__(self):
        super(MyImageProvider, self).__init__(QQuickImageProvider.Image)

    def requestImage(self, p_str, size):
        img = QImage(300, 300, QImage.Format.Format_BGR888)
        img.fill(Qt.green)
        return img, img.size()


if __name__ == '__main__':
    app = QGuiApplication(sys.argv)

    engine = QQmlApplicationEngine()
    engine.addImageProvider("myprovider", MyImageProvider())
    engine.load(QUrl.fromLocalFile("main.qml"))
    if len(engine.rootObjects()) == -1:
        sys.exit(-1)
    sys.exit(app.exec())

film

@SGaist main.qml

import QtQuick 2.15
import QtQuick.Controls 2.15

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    title: "Display Image"
    
    Image {
        id: image
        width: parent.width
        height: parent.height
        source: image // Context property created in Python code
    }
}

SGaist

You forgot to mention which version of ~~PySide~~ PyQt 6 you are using.

Also, how did you install it ?

film

@SGaist
I want to use pyqt6 because it has to be bundled with the project. please guide me

SGaist

Sorry, I misread the imports.

Anyway, the solution to your issue:

class MyImageProvider(QQuickImageProvider):
    def __init__(self):
        super(MyImageProvider, self).__init__(QQuickImageProvider.ImageType.Image)

    def requestImage(self, p_str, size):
        img = QImage(300, 300, QImage.Format.Format_BGR888)
        img.fill(Qt.green)
        return img, img.size()

film

This post is deleted!

film

@SGaist
now i got code like this i want cv2 to show in ui qml page more solution please help me

main.py

import sys
from pathlib import Path
import os
import cv2

from PyQt6.QtGui import QGuiApplication
from PyQt6.QtQml import QQmlApplicationEngine
from PyQt6.QtGui import QIcon, QPixmap, QImage
from PyQt6.QtWidgets import QFileDialog, QApplication
from PyQt6.QtCore import Qt, QThread, pyqtSignal, pyqtSlot, QObject, QSize
from PyQt6.QtQuick import QQuickPaintedItem, QQuickView, QQuickImageProvider

class ThreadCamera(QThread):
    updateFrame = pyqtSignal(QImage)

    def __init__(self, parent=None):
        QThread.__init__(self, parent)
    
    def run(self):
        self.cap = cv2.VideoCapture(0)
        while self.cap.isOpened():
            ret, frame = self.cap.read()
            if not ret:
                img = QImage("./images/network.png")
                self.updateFrame.emit(img)
            color_frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
            img = QImage(color_frame.data, color_frame.shape[1], color_frame.shape[0], QImage.Format.Format_RGB888)
            self.updateFrame.emit(img)



class ImageProvider(QQuickImageProvider):
    imageChanged = pyqtSignal(QImage)

    def __init__(self):
        super(ImageProvider, self).__init__(QQuickImageProvider.ImageType.Image)

        self.cam = ThreadCamera() 
        self.cam.updateFrame.connect(self.update_image)
        self.image = None

    def requestImage(self, id, size):
        if self.image:
            img = self.image
        else:
            img = QImage(600, 500, QImage.Format.Format_RGBA8888)
            img.fill(Qt.GlobalColor.black)

        return img,img.size()

          
    @pyqtSlot()
    def update_image(self, img):
        self.imageChanged.emit(img)
        self.image = img
    
    @pyqtSlot()
    def start(self):
        print("Starting...")
        self.cam.start()
    
    @pyqtSlot()
    def killThread(self):
        print("Finishing...")
        try:
            self.cam.cap.release()
            cv2.destroyAllWindows()
        except:
            pass



class MainWindow(QObject):
    def __init__(self):
        QObject.__init__(self)
    

if __name__ == "__main__":
    app = QApplication(sys.argv)
    app.setWindowIcon(QIcon("./images/network.png"))
    engine = QQmlApplicationEngine()

    #Get Context
    main = MainWindow()
    myImageProvider = ImageProvider()
    engine.rootContext().setContextProperty("backend", main)
    engine.rootContext().setContextProperty("myImageProvider", myImageProvider)
    
    engine.addImageProvider("MyImageProvider", myImageProvider)

    #Load QML File
    engine.load(os.fspath(Path(__file__).resolve().parent /  "main.qml"))

    if not engine.rootObjects():
        sys.exit(-1)
    sys.exit(app.exec())

main.qml

import QtQuick 6.3
import QtQuick.Window 6.3
import QtMultimedia 6.3
import QtQuick.Controls 6.3
import QtQuick.Layouts 6.3
import QtQuick.Dialogs 6.3




Window {
    visible: true
    width: 600
    height: 500
    title: "WebCam"
    Image {
        id: feedImage
        width: parent.width
        height: parent.height - 50
        fillMode: Image.PreserveAspectFit
        cache: false
        source: "image://MyImageProvider/img"
        property bool counter: false

        function reloadImage() {
            counter = !counter
            source = "image://MyImageProvider/img?id=" + counter
        }
    }

    RowLayout {
        anchors.top: feedImage.bottom
        anchors.horizontalCenter: feedImage.horizontalCenter

        Button {
            id: btnStartCamera
            text: "Start Camera"
            onClicked: {
                myImageProvider.start()
            }
        }
        
        Button {
            id: btnStopCamera
            text: "Stop Camera"
            onClicked: {
                myImageProvider.killThread()
             }
        }


    }

    
    Connections{
        target: myImageProvider

        function onImageChanged(image) {
            console.log("emit")
            feedImage.reloadImage()
        }
            
    }

}

film

@SGaist
Now there is an issue with TypeError: update_image() missing 1 required positional argument: 'img'.
which if I use PySide6 it works but I want to use it with PyQt6 because it has to be merged with the created project.

SGaist

You did not specify the type of the argument if your slot in pyqtSlot.