from PySide2.QtWidgets import QApplication
from PySide2.QtQml import qmlRegisterType
from PySide2.QtQuick import QQuickView
from PySide2.QtMultimedia import QAbstractVideoFilter, QVideoFilterRunnable
from PySide2.QtCore import QUrl

class ExampleFilterRunnable(QVideoFilterRunnable):
    def run(self, frame, surfaceFormat, flags):
        return frame

class ExampleFilter(QAbstractVideoFilter):
    def createFilterRunnable(self):
        return ExampleFilterRunnable()


app = QApplication([])
qmlRegisterType(ExampleFilter, "ExampleFilter", 1, 0, "ExampleFilter")
view = QQuickView()
url = QUrl("example.qml")

view.setSource(url)
view.setResizeMode(view.SizeRootObjectToView)
view.show()
app.exec_()

import QtQuick 2.0
import QtQuick.Controls 2.3
import QtMultimedia 5.8
import ExampleFilter 1.0

Rectangle {
    id: rectangle
    width: 800
    height: 600
    color: "black"

    ExampleFilter {
        id: filter
    }

    MediaPlayer {
        id: player
        source: "https://archive.org/download/Mario1_500/Mario1_500_LQ.avi"
        autoPlay: true
    }

    VideoOutput {
        id: videoOutput
        source: player
        filters: [filter]
        anchors.fill: parent
    }
}