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Conditional Assignment of video reader?

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Timothy
Timothy 2013-10-8
关闭： MATLAB Answer Bot 2021-8-20
I've seen many questions like this, but nothing that fit my problem quite right.
I'm running the Motion-Based Multiple Object Tracking example. In one of the nested functions, this is the assignment:
obj.reader = vision.VideoFileReader('atrium.avi');
I want to be able to select a different video and not have to open the function to do so. I want obj.reader to be assigned to that video only if it's not already assigned to a different video of my choice.
Is there an easy way of doing this, or should I just manually change the video in the function's code?
Thanks!

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