视频逆序

方法一：调用ffmpeg命令

ffmpeg -i "D:/desktop/1095594024.mp4" -vf reverse -af areverse "D:/desktop/reversed.mp4"

方法二 ：opencv

注：opencv 无法处理音频。所以用opencv逆序后 视频没有声音。仅有视频。

#include<opencv2/opencv.hpp>
#include <opencv2/core.hpp>
#include <iostream>
using namespace cv;
using namespace std;

int main()
{
    // 打开视频文件
    string videoPath = "D:/desktop/10123754.mp4";
    cv::VideoCapture cap(videoPath);
    if (!cap.isOpened()) {
        std::cerr << "Error: Unable to open the video file." << std::endl;
        return -1;
    }

    // 获取视频帧数和帧率
    int frameCount = cap.get(cv::CAP_PROP_FRAME_COUNT);
    double fps = cap.get(cv::CAP_PROP_FPS);

    // 创建视频编写器
    cv::VideoWriter writer("D:/desktop/reversed.mp4", cv::VideoWriter::fourcc('X', '2', '6', '4'), fps, cv::Size(cap.get(cv::CAP_PROP_FRAME_WIDTH), cap.get(cv::CAP_PROP_FRAME_HEIGHT)));

    // 从最后一帧开始逆序处理并写入新视频
    for (int i = frameCount - 1; i >= 0; i--) {
        cap.set(cv::CAP_PROP_POS_FRAMES, i);
        cv::Mat frame;
        cap >> frame;
        if (frame.empty())
            break;
        writer.write(frame);
    }

    // 释放资源
    cap.release();
    writer.release();

    std::cout << "Video reversed and saved as MP4 successfully." << std::endl;
    return 0;

}