从网络摄像头演示视频和录制-matlab

我写了一个剧本，用网络摄像机呈现电影和录音。问题是它以慢动作播放电影。我认为问题不在于拍摄快照（我检查了它）。代码如下：

clear cam  
v = VideoReader('movie.MP4');  
cam = webcam;
vidWriter = VideoWriter('webcam.avi');
open(vidWriter);

%pre loading the frames
for i=1:50
vtemp = readFrame(v);
vid{i}=vtemp;
end

for index = 1:50
    % Acquire frame for processing
    img = snapshot(cam);

    % Write frame to video
    writeVideo(vidWriter, img);

    %show the vid frame
    imshow(vid{index});
end
close(vidWriter);
clear cam

---

任何帮助都将不胜感激。

为输出影片设置相同的fps。