Loop question in DOS scripts

[test84]

Hi,

I'm trying to loop through two sets of files to pass them to ImageMagick in order to generate my result files. The challenge is how to read two files in my loop, as far as I went through, I can only loop through one set of files.

Here is concept of what I'm gonna do:

FOR %%a in (*.jpg)
DO FOR %%b in (*.bat)
convert %%a %%b -compose copy_opacity -composite %%result

Hence I donno how to set third file name.

[el_supremo]

If the combination of names in %%a and %%b is unique you could use that to create a new filename.
E.g. if %%a is "fred.jpg" and %%b is "whatever.png" you could create the name fred_whatever.gif (for example) using this kind of syntax:

Code: Select all

convert %%a %%b -compose copy_opacity -composite %%~na_%%~nb.gif

There is a description of %%~n and other tricks near the bottom of this page:
http://www.computerhope.com/forhlp.htm

Pete

[test84]

If the combination of names in %%a and %%b is unique you could use that to create a new filename.
E.g. if %%a is "fred.jpg" and %%b is "whatever.png" you could create the name fred_whatever.gif (for example) using this kind of syntax:

Code: Select all

convert %%a %%b -compose copy_opacity -composite %%~na_%%~nb.gif

There is a description of %%~n and other tricks near the bottom of this page:
http://www.computerhope.com/forhlp.htm

Pete

Thank you for the answer, but I can't assign %%a and %%b in DOS, I can only set one variable per FOR loop, where in this case we need two parameters for FOR loop.

And when I do something like this

Code: Select all

FOR %%a in (FIR_026?.jpg) DO FOR %%b in (FIR_026M?.jpg) DO  imconvert %%a %%b -compose copy_opacity -composite %%~na_%%~nb.png

So we have to traverse once with a one for loop.

it will do the Cartesian product and generate like 16 files instead of 4.

[anthony]

Also see... Usign IM from Windows Batch Scripts...
http://www.imagemagick.org/Usage/windows/

[test84]

Thank you, I could manage it all with Python.