Error using VideoReader/init (line 607) The filename specified was not found in the MATLAB path. Any ideas how to fix that error?

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abbxucy11 2016-9-26

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编辑： Walter Roberson 2016-9-27

Error using VideoReader/init (line 607) The filename specified was not found in the MATLAB path.

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Answer 1

Walter Roberson 2016-9-26

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You passed in a file name that is not the name of any file in your current directory or any directory on the path. In other words, you asked it to read a non-existing file.

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abbxucy11 2016-9-27

在 MATLAB Online 中打开

 video =[handles.FilePath handles.FileName]; 
  axes(handles.axesRoiVideo);        
 %create a  matrix to save the array of croped images
 img =  frame2im(VideoReader(video,1))

I ran the code with breakpoints and it's okay , the video variable is recognized by the first command but there's an error at the command VideoReader

Walter Roberson 2016-9-27

编辑：Walter Roberson 2016-9-27

在 MATLAB Online 中打开

%when you use uigetfile(), the path that is returned might not end in a folder separator. Use fullfile() to be safe.
filename = fullfile(handles.FilePath, handles.FileName);
if ~exist(filename, 'file')
  error('Video file "%s" does not exist', filename);
end
try
  videoobj = VideoReader(filename);
catch
  error('File "%s" cannot be read as a video', filename);
end
img = readFrame(videoobj);   %no frame2im !