测量视频编解码性能的OpenCV实现

测量视频编解码性能的OpenCV实现

本文将介绍如何使用OpenCV对视频编解码性能进行测量，并提供相应的源代码。

首先，我们需要从OpenCV库中导入相关模块：

import cv2
import time

然后，我们定义一个函数来进行编码测试：

def test_encode(video_path, codec, quality):

    # 打开视频文件
    cap = cv2.VideoCapture(video_path)
    
    # 获取视频帧率和分辨率
    fps = int(cap.get(cv2.CAP_PROP_FPS))
    width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
    height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
    
    # 定义视频编码器并设置质量参数
    fourcc = cv2.VideoWriter_fourcc(*codec)
    out = cv2.VideoWriter('output.mp4', fourcc, fps, (width, height), True)
    out.set(cv2.VIDEOWRITER_PROP_QUALITY, quality)
    
    # 开始编码测试
    start_time = time.time()
    while(cap.isOpened()):