python opencv 处理视频剪辑和配音

要使用Python和OpenCV处理视频剪辑和配音，可以按照以下步骤进行操作：

1. 导入必要的库

import cv2
import numpy as np
import moviepy.editor as mp

2. 读取视频文件

video = cv2.VideoCapture('video.mp4')

3. 获取视频信息

fps = video.get(cv2.CAP_PROP_FPS)
frame_count = int(video.get(cv2.CAP_PROP_FRAME_COUNT))
width = int(video.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(video.get(cv2.CAP_PROP_FRAME_HEIGHT))

4. 剪辑视频

start_sec = 10
end_sec = 20
start_frame = int(start_sec * fps)
end_frame = int(end_sec * fps)
clip_frames = end_frame - start_frame
video.set(cv2.CAP_PROP_POS_FRAMES, start_frame)

clip_array = np.zeros((clip_frames, height, width, 3), dtype=np.uint8)
for i in range(clip_frames):
    ret, frame = video.read()
    if not ret:
        break
    clip_array[i] = frame

5. 添加音频

audio = mp.AudioFileClip('audio.mp3')
audio_duration = audio.duration
audio = audio.subclip(start_sec, end_sec)

6. 合并视频和音频

clip = mp.VideoClip(lambda t: clip_array[int(t * fps)], duration=clip_frames / fps)
clip.audio = audio
clip.write_videofile('output.mp4', fps=fps)

以上是一个简单的视频剪辑和配音的流程，你可以根据具体需求进行更改和扩展。