Video is displayed smaller in figure

Dear Matlab users / Mathworks,

I want to play a movie in a figure and want that the figure has the same size as the movie (e.g. setting the figure position properties equal to the video width and height). When doing this, the figure is bigger than the movie played (see the blue marked area):

I've reproduced the same behavior with a mathworks example and default movie:

clear
close all
clc

vid = VideoReader('xylophone.mp4');
mov = struct('cdata',zeros(vid.Height,vid.Width,3,'uint8'),'colormap',[]);

% Read all frames
k = 1;
while hasFrame(vid)
    mov(k).cdata = readFrame(vid);
    k = k+1;
end

hf = figure;
hf.Position = [150 150 vid.Width vid.Height];
hf.MenuBar = 'none';
movie(hf,mov,1,vid.FrameRate);

Also changing other figure properties (e.g. InnerPosition or OuterPosition) didn't seem to help.

Can you please advise on how to change this behavior?

I am running the following install:

----------------------------------------------------------------------------------------------------
MATLAB Version: 9.2.0.556344 (R2017a)
Operating System: Microsoft Windows 7 Enterprise  Version 6.1 (Build 7601: Service Pack 1)
Java Version: Java 1.7.0_60-b19 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
----------------------------------------------------------------------------------------------------
MATLAB                                                Version 9.2         (R2017a)
Control System Toolbox                                Version 10.2        (R2017a)
Curve Fitting Toolbox                                 Version 3.5.5       (R2017a)
GUI Layout Toolbox                                    Version 2.3         (R2016b)
MATLAB_TFIGURE                                        Version 4.0                 
Signal Processing Toolbox                             Version 7.4         (R2017a)
System Identification Toolbox                         Version 9.6         (R2017a)

Thanks in advanced!

Kind regards,

Geert-Jan

----------------------------------------------

Note: the default figure units are 'pixels'. When switching to 'points' it makes the boundary's even bigger.

Note 2: It seems to work fine in on an old R2012a install I still heve. But the problem is present in R2017a.

Answer 1

[Shashank]

Hi Geert-Jan,

I tried running the example code that you mentioned in MATLAB R2017a. However, I am unable to reproduce the issue that you have specified. Here is a function that I have created which might be helpful for you:

function playVideo(filename)
  videoReader = VideoReader(filename);
  videoHeight = videoReader.Height;
  videoWidth = videoReader.Width;
  videoStruct = struct('cdata', zeros(videoHeight, videoWidth, 3, 'uint8'), 'colormap', []);

    numberOfFrames = 1;

    while hasFrame(videoReader)
        videoStruct(numberOfFrames).cdata = readFrame(videoReader);
        numberOfFrames = numberOfFrames + 1;
    end

    set(gcf, 'position', [150, 150, videoWidth, videoHeight]);
    set(gca, 'units', 'pixels');
    set(gca, 'position', [0, 0, videoWidth, videoHeight]);

    movie(videoStruct, 1, videoReader.FrameRate);
 end

- Shashank

[Geert-Jan Heldens]

Hi Shashank,

Thank you for giving feedback on my question. I've executed your function, but get the same results...

In my example code the movie is played in the figure, and in your function it is played inside an axes (I specify the handle to the figure in the 'movie()' function, in your call there is no handle given).

For some reason this is only the case in mij R2017a install :(

Anyhow, thanks for trying to help me out!

Kind regards, Geert-Jan