Not showing number of frames for specific video even if it is present in current path in matlab

Below code is showing error for correct_script_video.avi.But it is working fine for other videos.This video is present in current path but still its showing error.What is the reason?

Error is:

       Error in VideoReader (line 132)
        obj.init(fileName);

      Error in framescheck (line 1)
        obj = VideoReader('correct_script_video.avi');

Source code:

      vid = VideoReader('correct_script_video.avi');
      nFrames=vid.NumberOfFrames;
      nFrames

Answer 1

[Walter Roberson]

AVI that are Variable Frame Rate cannot show the number of frames until the video has been read all the way to the end.

[prashanth]

Actually i formatted video.So frame rate changed.Then what is the solution to get number of frames?