可能是 PySide2、QCamera、QAbstractVideoSurface 上的一个错误

如何解决可能是 PySide2、QCamera、QAbstractVideoSurface 上的一个错误

我想从相机捕捉图像。我有办法做到这一点。但它在 PyQt5 上成功运行。在 pyside2 上失败。

这是 pyside2 代码

import sys  
from pyside2.QtWidgets import QWidget,QApplication  
from pyside2.QtMultimedia import QCamera,QAbstractVideoSurface,QVideoSurfaceFormat,QVideoFrame

class CameraFrameGrabber(QAbstractVideoSurface):
    def __init__(self,parent=None):
        super(CameraFrameGrabber,self).__init__(parent)
        print('init')

    def supportedPixelFormats(self,type):
        print("supportedPixelFormats() called")
        print("supportedPixelFormats() finished")
        return [QVideoFrame.Format_ARGB32,QVideoFrame.Format_ARGB32_Premultiplied,QVideoFrame.Format_RGB32,QVideoFrame.Format_RGB24,QVideoFrame.Format_RGB565,QVideoFrame.Format_RGB555,QVideoFrame.Format_ARGB8565_Premultiplied,QVideoFrame.Format_BGRA32,QVideoFrame.Format_BGRA32_Premultiplied,QVideoFrame.Format_BGR32,QVideoFrame.Format_BGR24,QVideoFrame.Format_BGR565,QVideoFrame.Format_BGR555,QVideoFrame.Format_BGRA5658_Premultiplied,QVideoFrame.Format_AYUV444,QVideoFrame.Format_AYUV444_Premultiplied,QVideoFrame.Format_YUV444,QVideoFrame.Format_YUV420P,QVideoFrame.Format_YV12,QVideoFrame.Format_UYVY,QVideoFrame.Format_YUYV,QVideoFrame.Format_NV12,QVideoFrame.Format_NV21,QVideoFrame.Format_IMC1,QVideoFrame.Format_IMC2,QVideoFrame.Format_IMC3,QVideoFrame.Format_IMC4,QVideoFrame.Format_Y8,QVideoFrame.Format_Y16,QVideoFrame.Format_Jpeg,QVideoFrame.Format_Cameraraw,QVideoFrame.Format_Adobedng]

    # def isFormatSupported(self,format):
    #     print("isFormatSupported() called")

    # def start(self,format):
    #     print("start() called")

    def present(self,frame):
        print('call present')
        print(frame)
        return True

    # def stop(self):
    #     print("stop() called")
  
if __name__ == '__main__':  
    app = QApplication(sys.argv)  
    w = QWidget()  
    w.show()  
    w.setwindowTitle("Hello PyQt5")  
    the_camera = QCamera()
    the_grabber = CameraFrameGrabber()
    the_camera.setViewfinder(the_grabber)
    the_camera.start()
    sys.exit(app.exec_())  

这是 PyQt5 代码

import sys  
from PyQt5.QtWidgets import QWidget,QApplication  
from PyQt5.QtMultimedia import QCamera,frame):
        print('call present')
        print(frame)
        return True

    # def stop(self):
    #     print("stop() called")
  
if __name__ == '__main__':  
    app = QApplication(sys.argv)  
    w = QWidget()  
    w.show()  
    w.setwindowTitle("Hello PyQt5")  
    the_camera = QCamera()
    the_grabber = CameraFrameGrabber()
    the_camera.setViewfinder(the_grabber)
    the_camera.start()
    sys.exit(app.exec_())  

两个代码都运行成功。

目前在 PyQt5 中调用的函数，在 pyside2 中未调用。

pyside2 和 PyQt5 的用法有什么区别。

谁能告诉我为什么会这样？谢谢。