使用matlab在视频序列上画多个矩形框，矩形框的坐标是txt文件，一共有4个txt文件，txt文件里面格式是xywh，每一行对应一帧图像画矩形框，并保存成图片的具体代码

以下是使用 MATLAB 在视频序列上画多个矩形框的代码：

% 读取 txt 文件
txt1 = importdata('txt1.txt');
txt2 = importdata('txt2.txt');
txt3 = importdata('txt3.txt');
txt4 = importdata('txt4.txt');

% 读取视频文件
video = VideoReader('video.mp4');

% 设置输出文件夹
outputFolder = 'output';
if ~exist(outputFolder, 'dir')
    mkdir(outputFolder);
end

% 遍历视频的每一帧
for i = 1:video.NumFrames
    % 读取当前帧
    frame = read(video, i);
    
    % 画矩形框
    for j = 1:size(txt1, 1)
        x = txt1(j, 1);
        y = txt1(j, 2);
        w = txt1(j, 3);
        h = txt1(j, 4);
        frame = insertShape(frame, 'Rectangle', [x y w h], 'LineWidth', 2, 'Color', 'red');
    end
    for j = 1:size(txt2, 1)
        x = txt2(j, 1);
        y = txt2(j, 2);
        w = txt2(j, 3);
        h = txt2(j, 4);
        frame = insertShape(frame, 'Rectangle', [x y w h