how to process multiple video files from a folder

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Life is Wonderful
Life is Wonderful 2023-8-21
评论： Life is Wonderful 2023-8-22
Ran in:
I am in the process of processing numerous video files from a folder, so I need a sample support for processing one video file at a time. I am using the following snippet, but I am getting stuck with the following additional parameter when I look at the file name, which is halting my progress. Any assistance would be greatly appreciated.
folder = 'C:\Video_file\';
files = dir(folder)
files = 0×1 empty struct array with fields: name folder date bytes isdir datenum
files.name
numel(files.name)
Error using numel
Not enough input arguments.
ans =
162 % on my windows system
I see followig output
files.name
ans =
'.' % this is NOT required
ans =
'..' % this is NOT required
ans =
'dummy1.avi'
ans =
'dummy2.avi'
Thank you very much.
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Stephen23
Stephen23 2023-8-21
编辑：Stephen23 2023-8-21
numel(S.name) % this will throw an error if S has zero/multiple elements.
"I want to loop through the files one by one"
You can simply loop over the elements of S:
S = dir(..);
for k = 1:numel(S)
F = fullfile(S(k).folder,S(k).name);
% do whatever you want with filename F
end
https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html
https://www.mathworks.com/help/matlab/matlab_prog/access-multiple-elements-of-a-nonscalar-struct-array.html

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回答（2 个）

C B
C B 2023-8-21
files = dir('C:\Video_file\*.avi')
Image Analyst
Image Analyst 2023-8-21
This is one of the most common FAQ questions, so see the FAQ:
https://matlab.fandom.com/wiki/FAQ#How_can_I_process_a_sequence_of_files?

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