你能给我一段显示视频的matlabGUI代码吗

当然可以，请参考下面的代码，这是一个简单的 MATLAB GUI，可以用来显示视频（需要替换视频文件的路径）：

function varargout = video_display_gui(varargin)
% VIDEO_DISPLAY_GUI MATLAB code for video_display_gui.fig
%      VIDEO_DISPLAY_GUI, by itself, creates a new VIDEO_DISPLAY_GUI or raises the existing
%      singleton*.
%
%      H = VIDEO_DISPLAY_GUI returns the handle to a new VIDEO_DISPLAY_GUI or the handle to
%      the existing singleton*.
%
%      VIDEO_DISPLAY_GUI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in VIDEO_DISPLAY_GUI.M with the given input arguments.
%
%      VIDEO_DISPLAY_GUI('Property','Value',...) creates a new VIDEO_DISPLAY_GUI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before video_display_gui_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to video_display_gui_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help video_display_gui

% Last Modified by GUIDE v2.5 28-Nov-2018 15:25:12

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @video_display_gui_OpeningFcn, ...
                   'gui_OutputFcn',  @video_display_gui_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before video_display_gui is made visible.
function video_display_gui_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to video_display_gui (see VARARGIN)

% Choose default command line output for video_display_gui
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes video_display_gui wait for user response (see UIRESUME)
% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.
function varargout = video_display_gui_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% open video file
[filename, pathname] = uigetfile({'*.avi;*.mp4','Video Files (*.avi,*.mp4)'},'Select Video File');
if ~filename
    return
end

% create video reader object
vidObj = VideoReader(fullfile(pathname, filename));

% create video player object
vidPlayer = vision.VideoPlayer('Position', [20, 50, 650, 510]);

% display video frame by frame
while hasFrame(vidObj)
    frame = readFrame(vidObj);
    vidPlayer(frame);
end

% release video player and reader objects
release(vidPlayer);
delete(vidPlayer);
clear vidPlayer;
clear vidObj;

这段代码会打开一个 GUI 窗口，其中包含一个按钮。单击按钮后，会弹出一个文件选择对话框，选择视频文件后，程序会打开一个视频播放器，并将视频逐帧显示在播放器中。