How can I use VideoReader to read a variable file name

I am writing a function that will call many videos and take certain frames from them. I am trying to use a loop in order to allow for the function to read the video names in a folder and place them in VideoReader so I can look through many videos without having to import each video individually.

The general area of issue in the code is here:

    videos = dir(videoFolder);
    for k=3:length(videos)
        vidName = videos(k).name;
        v = VideoReader(vidName);
        %motion detection code follows
    end

where vidName returns the desired name but I believe VideoReader is searching for the file named "vidName" as opposed to the video file name it represents. I receive this error:

Error using VideoReader/init (line 601)
The filename specified was not found in the MATLAB path.

 Error in VideoReader (line 171)
            obj.init(fileName);

 Error in motion_detection (line 12)
    v = VideoReader('vidName');

Answer 1

[Stephen23]

The bug is clear in the error message: you supply a char vector like this:

v = VideoReader('vidName');

when you should be supplying the variable itself, like this:

v = VideoReader(vidName);

[Tristan Sayre]

Great thanks! It turns out I had forgotten to add the folder to the file path as well which is why the code wasn't working when I used VideoReader without the single quotes.