PyQt5 在 moviepy 连接视频时显示黑色 window 没有小部件

PyQt5 shows black window without widgets while moviepy is concatenating videos

连接两个视频文件时,PyQt window 完全是黑色的,没有任何小部件。背景颜色变为灰色,小部件仅在视频连接后显示。

我希望在连接视频时看到灰色 window 和我的小部件。

这是脚本:

import os
import sys
from PyQt5.QtWidgets import *
from moviepy.editor import VideoFileClip, concatenate_videoclips


class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Using Labels")
        self.setGeometry(50,50,350,350)
        self.UI()


    def UI(self):
        text1=QLabel("Hello Python",self)
        text1.move(50,50)
        self.show()

def make_movie():
    sep = os.sep
    directory_stub = '.' + sep + 'src' + sep + "assets" + sep  
    clip1 = VideoFileClip(directory_stub + 'introoutro' + sep + "intro.mp4")
    clip2 = VideoFileClip(directory_stub + 'introoutro' + sep + "outro.mp4")
    final_clip = concatenate_videoclips([clip1,clip2])
    final_clip.write_videofile("my_concatenation.mp4")

def main():
    App = QApplication(sys.argv)
    window=Window()
    make_movie()
    sys.exit(App.exec_())

if __name__ == '__main__':
    main()

在整理视频时我看到了这个:

我想在视频处理期间看到它,但我只看到它 1. 处理完成后或 2. 如果我编辑代码以从不调用 make_movie():

感谢您的帮助。

串联是一项非常耗时的任务,因此它不应该 运行 在主线程上,因为它会冻结 GUI:

import os
import sys
import threading

from PyQt5.QtCore import pyqtSignal, pyqtSlot, QObject
from PyQt5.QtWidgets import QApplication, QLabel, QWidget
from moviepy.editor import VideoFileClip, concatenate_videoclips


class QMovie(QObject):
    started = pyqtSignal()
    finished = pyqtSignal()

    def concatenate(self, inputs, output):
        threading.Thread(
            target=self._concatenate, args=(inputs, output), daemon=True
        ).start()

    def _concatenate(self, inputs, output):
        self.started.emit()
        clips = []
        for input_ in inputs:
            clip = VideoFileClip(input_)
            clips.append(clip)
        output_clip = concatenate_videoclips(clips)
        output_clip.write_videofile(output)
        self.finished.emit()


class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Using Labels")
        self.setGeometry(50, 50, 350, 350)
        self.UI()

    def UI(self):
        text1 = QLabel("Hello Python", self)
        text1.move(50, 50)
        self.show()


def main():
    App = QApplication(sys.argv)
    window = Window()

    directory_stub = os.path.join(".", "src", "assets")
    in1 = os.path.join(directory_stub, "introoutro", "intro.mp4")
    in2 = os.path.join(directory_stub, "introoutro", "outro.mp4")
    qmovie = QMovie()
    qmovie.concatenate([in1, in2], "my_concatenation.mp4")
    sys.exit(App.exec_())


if __name__ == "__main__":
    main()