更改视频播放速度 Python/Opencv |
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根据更改原始视频的播放速度并保存更改视频 可指定fps，也可指定播放倍速，两者同时指定时，以fps为主 依赖库python3，cv2 代码实现 #!/usr/bin/env python # -*- coding: utf-8 -*- # @Time : 2021/04/08 # @Author : Devil_Xiao # Purpose: This script is used to change the video_speed # You can choose to specify the fps, # or you can choose to change the multiple of the original playback speed import cv2 from cv2 import VideoWriter, VideoWriter_fourcc import argparse def video_speed(video_root, out_root, fps=None, scale=1): """When fps and scale are specified at the same time, fps is the dominant""" cap = cv2.VideoCapture(video_root) video_width = int(cap.get(3)) video_height = int(cap.get(4)) fourcc = cv2.VideoWriter_fourcc('m', 'p', '4', 'v') if fps: videoWriter = cv2.VideoWriter(out_root, fourcc, fps, (video_width, video_height)) else: fps = int(cap.get(cv2.CAP_PROP_FPS) * scale) videoWriter = cv2.VideoWriter(out_root, fourcc, fps, (video_width, video_height)) flag = cap.isOpened() while (flag): flag, frame = cap.read() videoWriter.write(frame) videoWriter.release() if __name__ == '__main__': parser = argparse.ArgumentParser() parser.add_argument('--video_name', type=str, default=r'video.mp4', help='original video name') parser.add_argument('--result_name', type=str, default=r'result.mp4', help='result name') parser.add_argument('--fps', type=int, default=None, help='Specify the playback frame rate') parser.add_argument('--scale', type=float, default='0.5', help='Change the original video speed') opt = parser.parse_args() print(opt) video_speed(opt.video_name, opt.result_name, opt.fps, opt.scale)该模块会将平时写的一些小脚本分享给大家，有帮助的话请点赞支持下吧~❀❀❀ |
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