VideoReader Frame Extraction Artifacts and Inversion in MATLAB 2018a

I am had an application running on MATLAB 2015aSP1 that I want to port over to MATLAB 2018. However, I am having an issue with VideoReader script. When I extract a frame from a .mov file using MATLAB 2015aSP1, I am able to acquire the frame.

However, when I run the same set of commands with MATLAB 2018, the extracted frame has artifacts and is inverted. I have posted the code below and attached images of the MATLAB 2015 and 2018 results.

ipPath = 'path ';
obj.FrameObj = VideoReader(ipPath);
obj.NumFrames = round(obj.FrameObj.Duration*obj.FrameObj.FrameRate);
obj.CurrentTime = zeros(obj.NumFrames,1);
obj.CurrFrameIdx = 1;
obj.FrameObj.CurrentTime = obj.CurrentTime(obj.CurrFrameIdx);
frame = readFrame(obj.FrameObj);
figure;imshow(frame)

[Walter Roberson]

Which operating system are you using? You mention .mov, which hints it might be Mac, since .mov is QuickTime ?

[Arjun Desai]

using Windows 10

Answer 1

[Reece Teramoto]

Hi Arjun,

The issue is likely due to this bug regarding the use of graphical hardware acceleration to perform video decoding on certain releases of MATLAB for some Windows systems:

Please try turning off hardware acceleration for video decoding by executing the following before reading in the video:

    >> matlab.video.read.UseHardwareAcceleration('off')

As a reference, the following documentation explains the use of graphics hardware for decoding some video types on Windows:

https://www.mathworks.com/help/matlab/import_export/read-video-files.html#buh27gu-26