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PyQt5 QMediaplayer in GraphicView

Jealous Jellyfish answered on April 1, 2023 Popularity 1/10 Helpfulness 1/10

answer PyQt5 QMediaplayer in GraphicView

PyQt5 QMediaplayer in GraphicView

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PyQt5 GraphicView for .mp4 video in QMediaPlayer

class Mainwindow(QMainWindow):
        # self.grahicsView is the QGrahicView Widget
        
        def __init__(self):
           self.scene = QGraphicsScene(self)
           self.graphicsView.setScene(self.scene)
           self.video_item = QtMultimediaWidgets.QGraphicsVideoItem()
           self.scene.addItem(self.video_item)
           self.mediaplayer = QtMultimedia.QMediaPlayer(None,QMediaPlayer.VideoSurface)
           self.mediaplayer.setVideoOutput(self.video_item)
       
        # update the position of the rect_item based on the position of the video_item
        def update_bounding_box(self,frame,rect):
           frame_size = QtCore.QSize(self.width, self.height)
           viewport_rect = self.graphicsView.viewport().rect()
           self_size = viewport_rect.size()
           scale_factor = min(frame_size.width() / self_size.width(), frame_size.height() / self_size.height())
           rect = QRectF(rect.x() - scale_factor, rect.y() - scale_factor,
                                      rect.width() - scale_factor, rect.height() - scale_factor)
           self.bbox.set_bounding_rect(rect)
           self.bbox.update()
 
       def handleVideo(self,frame):
           # Extracting the frames from QMediaplyaer and compare it with video frames
           if not isinstance(frame, QtMultimedia.QVideoFrame):
                return
           image_cv = frame.image().convertToFormat(QImage.Format_RGB888)
           width = frame.width()
           height = frame.height()
           ptr = image_cv.bits()
           ptr.setsize(image_cv.byteCount())
           arr = np.array(ptr).reshape(height, width, 3)
           self.frames.append(arr)
                   
       def show_bbox(self):
           # getting the value for bbox and label as list of dictionary for bounding box coordinates and label for the predicted objects by using .json file and .jpg image as input
           # data is list of dictionary for labels ,bbox and Image Name from .json files:
           # Declare Filename from self.directory is filename from path
           for filename in self.filenames:
            if filename['Name'] in data :
              value = data[filename['Name']]
                  box = value['BBox']
              label = value['Labels']
              rect = QRectF(box['x'],box['y'],box['w'],box['h'])
              self.media_player.positionChanged.connect(lambda frame:self.update_bounding_box(frame,rect))

              #  Add Label to the Bounding Box:
              self.text_label = QGraphicsTextItem(label)
              self.text_label.setFont(self.font)
              self.text_label.setDefaultTextColor(QColor(255,0,0))
              self.text_label.setPos(rect.topLeft() - QtCore.QPointF(0, self.text_label.font().pointSize()))
                
              self.scene.addItem(self.bbox) #bbox is BoundingBoxItem(QPen)
              self.scene.addItem(self.text_label)
                
         # calling the function self.show_bbox() in the main funciton
           self.show_bbox()

The Sample code for My Question

Popularity 1/10 Helpfulness 1/10 Language python

Source: stackoverflow.com

Tags: pyqt5 python

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Contributed on Apr 01 2023

Jealous Jellyfish

0 Answers Avg Quality 2/10

PyQt5 QMediaplayer in GraphicView

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