合并视频和音频下面三行代码可以写注释嘛，实在不知道是什么意思

import pyaudio
import wave
from PIL import ImageGrab
import cv2
import threading
import time
from numpy import array
from moviepy.editor import *
import os

class PyRecord:
def init(self, file_path="test"):
self.allow_record = True
self.file_path = file_path

def record_audio(self):
    # 如无法正常录音 请启用计算机的"立体声混音"输入设备
    CHUNK = 1024
    FORMAT = pyaudio.paInt16
    CHANNELS = 2
    RATE = 11025
    p = pyaudio.PyAudio()
    stream = p.open(
        format=FORMAT,
        channels=CHANNELS,
        rate=RATE,
        input=True,
        frames_per_buffer=CHUNK,
    )
    wf = wave.open(self.file_path + ".wav", "wb")
    wf.setnchannels(CHANNELS)
    wf.setsampwidth(p.get_sample_size(FORMAT))
    wf.setframerate(RATE)

    while self.allow_record:
        data = stream.read(CHUNK)
        wf.writeframes(data)

    stream.stop_stream()
    stream.close()
    p.terminate()
    wf.close()

def record_screen(self):
    im = ImageGrab.grab()
    video = cv2.VideoWriter(
        self.file_path + ".avi", cv2.VideoWriter_fourcc(*"XVID"), 10, im.size
    )
    while self.allow_record:
        im = ImageGrab.grab()
        im = cv2.cvtColor(array(im), cv2.COLOR_RGB2BGR)
        video.write(im)
    video.release()

def compose_file(self):
    print("合并视频&音频文件")
    audio = AudioFileClip(self.file_path + ".wav")
    video = VideoFileClip(self.file_path + ".avi")
    ratio = audio.duration / video.duration
    video = video.fl_time(lambda t: t / ratio, apply_to=["video"]).set_end(
        audio.duration
    )
    video = video.set_audio(audio)
    video = video.volumex(5)
    video.write_videofile(
        self.file_path + "_out.avi", codec="libx264", fps=10, logger=None
    )
    video.close()

def remove_temp_file(self):
    print("删除缓存文件")
    os.remove(self.file_path + ".wav")
    os.remove(self.file_path + ".avi")

def stop(self):
    print("停止录制")
    self.allow_record = False
    time.sleep(1)
    self.compose_file()
    self.remove_temp_file()

def run(self):
    t = threading.Thread(target=self.record_screen)
    t1 = threading.Thread(target=self.record_audio)
    t.start()
    t1.start()
    print("开始录制")

pr = PyRecord()
pr.run()
time.sleep(10)
pr.stop()

pyaudio是音频处理模块，moviepy是视频处理模块，PIL是图片处理模块，其实直接用ffmpeg能对音频，视频直接处理，python通过指令方式执行ffmpeg指令即可