设计一个程序，实现对视频文件进行剪辑和合并。要求使用指针来实现

以下是一个基本的视频剪辑和合并程序，使用指针来实现：

#include <iostream>
#include <fstream>

using namespace std;

struct Video {
    char* data;
    int length;
};

void clip(Video* input, Video* output, int start, int end) {
    output->length = end - start;
    output->data = new char[output->length];
    for (int i = start; i < end; i++) {
        output->data[i - start] = input->data[i];
    }
}

void merge(Video* input1, Video* input2, Video* output) {
    output->length = input1->length + input2->length;
    output->data = new char[output->length];
    for (int i = 0; i < input1->length; i++) {
        output->data[i] = input1->data[i];
    }
    for (int i = 0; i < input2->length; i++) {
        output->data[i + input1->length] = input2->data[i];
    }
}

int main() {
    Video* video1 = new Video;
    Video* video2 = new Video;

    // Load video data from files
    ifstream file1("video1.mp4", ios::binary);
    if (file1.is_open()) {
        file1.seekg(0, ios::end);
        video1->length = file1.tellg();
        file1.seekg(0, ios::beg);
        video1->data = new char[video1->length];
        file1.read(video1->data, video1->length);
        file1.close();
    }

    ifstream file2("video2.mp4", ios::binary);
    if (file2.is_open()) {
        file2.seekg(0, ios::end);
        video2->length = file2.tellg();
        file2.seekg(0, ios::beg);
        video2->data = new char[video2->length];
        file2.read(video2->data, video2->length);
        file2.close();
    }

    // Clip and merge videos
    Video* clip1 = new Video;
    clip(video1, clip1, 0, 1000);

    Video* clip2 = new Video;
    clip(video2, clip2, 500, 1500);

    Video* merged = new Video;
    merge(clip1, clip2, merged);

    // Save merged video to file
    ofstream outfile("merged.mp4", ios::binary);
    if (outfile.is_open()) {
        outfile.write(merged->data, merged->length);
        outfile.close();
    }

    // Free memory
    delete[] video1->data;
    delete[] video2->data;
    delete clip1;
    delete clip2;
    delete merged;

    return 0;
}

该程序首先从文件中加载两个视频的数据，并将它们存储在 Video 结构体中。然后使用 clip() 函数剪辑视频1和视频2，使用 merge() 函数将剪辑后的视频合并成一个新的视频。最后，将合并后的视频数据保存在文件中，释放内存并结束程序。

需要注意的是，该程序仅仅是一个基本的示例，实际应用中还需要考虑更多的细节问题，例如视频格式、编码、分辨率等。