Exporting animations without using shell commands

[ebaily]

Hi，all of the great gods. Here's a little problem.

I want to output .mp4 movie from here, but it doesn't work.

One of My primary function is to modify the attributes of MyScene,Such as duration or color and then export animations.

And the second mind is that I don't want to load the module from '.py' file by use "manimgl manim_test.py MyScene -w"

How can I resolve this problem?

Thanks very much.

import shlex
import subprocess
from PyQt5.QtCore import QThread, pyqtSignal
from PyQt5.QtWidgets import QMainWindow, QVBoxLayout, QPushButton, QWidget, QApplication
from manimlib import *


class MyScene(Scene):
    duration = 1
    color = '#FF0000'

    def construct(self):
        dot = Dot(color=self.color)
        self.add(dot)
        self.play(ShowCreation(dot), run_time=self.duration)
        self.wait(1)


# demo = MyScene()
# demo.run()

class Worker(QThread):
    finished = pyqtSignal()

    def __init__(self, parent=None):
        super().__init__(parent)

    def run(self):
        # I don't want to use this scheme
        # subprocess.run(shlex.split('manimgl manim_test.py MyScene -w --file_name demo_test_name'))
        self.finished.emit()


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('Animation Generator with PyQt5 and manimgl')
        self.setGeometry(300, 300, 300, 200)
        layout = QVBoxLayout()
        self.workerThread = Worker()
        self.workerThread.finished.connect(self.threadFinished)
        self.generate_button = QPushButton('Generate Animation', self)
        self.generate_button.clicked.connect(self.outputFile)
        layout.addWidget(self.generate_button)
        central_widget = QWidget()
        central_widget.setLayout(layout)
        self.setCentralWidget(central_widget)

        self.windowScene = MyScene()
        self.windowScene.duration = 2
        self.windowScene.color = '#ff0088'
        self.windowScene.run()  # It works.
        #TODO
        # self.windowScene.file_writer.begin()  # Here try to write animations to the disk
        # I want to output .mp4 movie from here, but it doesn't work.
        # One of My primary function is to modify the attributes of MyScene,Such as duration or color.
        # And the second mind is that I don't want to load the module from '.py' file by use "manimgl manim_test.py MyScene -w"
        # How can I resolve this problem?
        # Thanks very much.

    def threadFinished(self):
        print('finish')
        self.workerThread.quit()

    def outputFile(self):
        print('begin')
        #TODO
        # self.windowScene.file_writer.begin()  # Here try to write animations to the disk
        # Export animation "self.windowScene" to hard drive
        # self.workerThread.start()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = MainWindow()
    ex.show()
    sys.exit(app.exec_())