如何在python GUI中显示cv2视频? [英] How to display a cv2 video inside a python GUI?

问题描述

我正在使用Python/PyQt5创建一个GUI，该GUI应该在同一窗口中显示视频以及其他小部件.我尝试了不同的方法来解决此问题，但Stil似乎无法使其正常工作.

I'm creating a GUI using Python/PyQt5 which should display a video along with other widgets in the same window. I've tried different approaches to this problem but stil can't seem to get it to work.

方法1:使用OpenCV/cv2在像素图中添加视频只会显示视频的第一帧.

Approach 1: Adding the video in a pixmap using OpenCV/cv2 only shows the first frame of the video.

方法2:我设法用cv2播放了视频，但是它在新窗口中打开.

Approach 2: I have managed to get the video to play using cv2 however, it opens up in a new window.

方法3:我也尝试使用QVideoWidget，但显示空白屏幕，并且视频无法播放.

Approach 3: I also tried using QVideoWidget, but a blank screen shows and the video does not play.

# only shows an image from the video, but in the correct place
        cap = cv2.VideoCapture('video.mov')
        ret, frame = cap.read()
        if ret:
            frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
            img = QImage(frame, frame.shape[1], frame.shape[0], QImage.Format_RGB888)
            pix = QPixmap.fromImage(img)
            pix = pix.scaled(600, 400, Qt.KeepAspectRatio, Qt.SmoothTransformation)
            self.ui.label_7.setPixmap(pix)

        # opens new window
        cap = cv2.VideoCapture('video.mov')

        while (cap.isOpened()):
            ret, frame = cap.read()

            self.ui.frame = cv2.imshow('frame', frame)
            if cv2.waitKey(1) & 0xFF == ord('q'):
                break

        cap.release()

        # shows a blank screen 
        self.mediaPlayer = QMediaPlayer(None, QMediaPlayer.VideoSurface)
        videoWidget = self.ui.vid_widget
        self.mediaPlayer.setVideoOutput(videoWidget)
        self.mediaPlayer.setMedia(QMediaContent(QUrl.fromLocalFile('video.mov')))

在如何使视频在另一个窗口小部件中/在同一窗口中播放的任何帮助将不胜感激.

Any help on how to get the video play inside another widget/in the same window would be really appreciated.

推荐答案

在 while 循环中，您需要将 frame 转换为 QPixmap 同样，类似于您在上面所做的操作，然后更新 ui :

Inside the while loop, you need to convert frame into a QPixmap again, similar to what you did above, and then update ui:

cap = cv2.VideoCapture('video.mov')

while (cap.isOpened()):
    ret, frame = cap.read()
    if not ret:
        break

    frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
    img = QImage(frame, frame.shape[1], frame.shape[0], QImage.Format_RGB888)
    pix = QPixmap.fromImage(img)
    pix = pix.scaled(600, 400, Qt.KeepAspectRatio, Qt.SmoothTransformation)
    self.ui.label_7.setPixmap(pix)    

    self.ui.frame = pix  # or img depending what `ui.frame` needs

    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()

这篇关于如何在python GUI中显示cv2视频?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！