Why is VideoReader() loading the incorrect video height in Windows 10?

I am loading a .avi video file using VideoReader(). I am testing this script in MATLAB 2017b on Windows 7 64-bit and Windows 10. In both Win7, and Win10, the video properties from the file manager show the video size being 720 x 480. The script goes like this:

vidpath = 'video.avi';
vidObj  = VideoReader(vidpath)

width  = vidObj.Width;
height = vidObj.Height;
frameR = vidObj.FrameRate;
vidStr = struct('cdata', zeros(height, width, 3, 'unit8', 'colormap', []);

nFrames = 0;
while hasFrame(vidObj)
   nFrames = nFrames + 1;
   vidStr(nFrames).cdata = readFrame(vidObj)
end

movie(vidStr, 1, frameR)

Running this script on MATLAB 2017b in Win7, VideoReader() returns the correct size, and shows a clean video. Running it on Win10 with MATLAB 2017b, it returns a height of 540, and the video is completely distorted with varying horizontal lines. Attempting to override the height problem by simply writing height = 480;, does not fix this problem.

All of my GPU drivers are up to date, and I have in fact tested this on two different Win10 machines. Any help would be appreciated.

Answer 1

[Dante]

I found that running the line matlab.video.read.UseHardwareAcceleration('off') fixed my issue. I am going to include it at the top of my code so that it runs every time I run the script. However through tests, I found the setting persists even when you open and close MATLAB.

[AKASH YADAV]

Thanks @Dante

[Ryan Troha]

Hi, I was having the same problem originally posted here and I've tried including the line that @Dante mentioned, but I still have the same problem (height is reading as 540, but should be 480). At what point in mind code should I include the additional line? Before or after the VideoReader function? Thanks.