Variable frame number in 2 different machines

vidObj = VideoReader('video_file.avi');
numFrames = 0;
while hasFrame(vidObj)
readFrame(vidObj);
numFrames = numFrames + 1;
end
numFrames

I am getting a variable numFrames (number of frames) in running the same code on two different machines

i.e. I am reading the number of frames using the above code snippet in two separate machines both with Matlab2017 installed, on the same video file. However, I am getting two different values of frame numbers on each machine. Could you please let me know why that is so?

[KSSV]

is the video same?

[Akshay Ravindran]

Yes the video is the same. I checked it with a couple of friends I am seeing the pattern there as well.

[KSSV]

I checked same video in two different pc's..I got same number of frames.....is version same on all pc's? (I don't think this is going to affect anyways)

[Akshay Ravindran]

Hereby attaching the results from multiple workstations. It is not like it alters between every machine. There is a discrepancy in select few machines, the cause of which is what I am trying to understand here.

FYI > Everything is the same in both systems except that in my laptop its matlab2017b and in my workstation its matlab2017a if that helps

[Duncan Lilley]

Hi, are you able to provide an example file which you are noticing this issue with?

What operating systems are you using on the machines which you are testing this on?

[Akshay Ravindran]

Unfortunately, the data is part of the research work and will not be able to share. Is there any other way in which this can be figured out? My personal laptop is running on windows 10 whereas the other workstation has windows7.

[Walter Roberson]

I suggest using VLC to transcode the file. I suspect that it is either corrupt or uses some video feature that was not available in Windows 7 readers.

[Akshay Ravindran]

When I tried the vision.VideoReader function I am getting the same value in both systems.