如何在Python中编写变帧率视频

pip install opencv-python

import cv2

def change_frame_rate(input_video, output_video, target_frame_rate):
    # 打开输入视频
    cap = cv2.VideoCapture(input_video)

    # 获取输入视频的帧率
    frame_rate = cap.get(cv2.CAP_PROP_FPS)

    # 计算帧率比例
    frame_rate_ratio = target_frame_rate / frame_rate

    # 创建输出视频的编码器
    fourcc = cv2.VideoWriter_fourcc(*'mp4v')
    out = cv2.VideoWriter(output_video, fourcc, target_frame_rate, (int(cap.get(3)), int(cap.get(4))))

    while cap.isOpened():
        ret, frame = cap.read()

        if not ret:
            break

        # 写入输出视频
        out.write(frame)

        # 重复帧以达到目标帧率
        for _ in range(int(frame_rate_ratio - 1)):
            out.write(frame)

    # 释放资源
    cap.release()
    out.release()

    print("变帧率视频已生成！")

# 调用函数生成变帧率视频
change_frame_rate("input.mp4", "output.mp4", 30)