use a variable name with VideoWriter

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Bryan Clark
Bryan Clark 2018-4-9
评论： Walter Roberson 2018-4-10
I am trying to create a program to create videos from images. I would like to use inputdlg to create a variable file name. I can use a selected path. However, it doesn't appear that VideoWriter allows you to use a variable name. Is there a way around this?

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采纳的回答

Walter Roberson
Walter Roberson 2018-4-9
VideoWriter has no problems with variable file names.
[filename, pathname] = uiputfile('*.avi', 'Select an output file');
if ~ischar(filename); return; end %user cancel
fullname = fullfile(pathname, filename);
obj = VideoWriter(fullname);
...

更多回答（1 个）

Bryan Clark
Bryan Clark 2018-4-10
编辑：Walter Roberson 2018-4-10
fileName = inputdlg('Input File Name');
fileName = strcat(fileName,'.avi');
if ~ischar(fileName);
a = 'not char'
disp(a)
end
my problem is that the inputdlg doesn't seem to create a chr variable even though is seems to be. Is there a way to make inputdlg return a chr array?
  1 个评论
Walter Roberson
Walter Roberson 2018-4-10
response = inputdlg('Input File Name');
fileName = response{1};
if isempty(fileName); return; end %user cancel
[dirname, basename, ext] = fileparts(fileName);
if isempty(ext); ext = '.avi'; end
fileName = fullfile(dirname, [basename ext]);

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