Need help with looping over directories

[seanspotatobusiness]

Could someone provide the code for looping through directories? I'd like to convert my (40 GB total!) uncompressed TIFFs to LWZ-compressed TIFFs but maintaining directory structure/hierarchy.

[fmw42]

Could someone provide the code for looping through directories? I'm in a similar situation with respect to maintaining directory structure/hierarchy except I want to convert my (40 GB total!) uncompressed TIFFs to LWZ-compressed TIFFs.

Code depends upon your OS (Windows or Unix)? Also what version of IM are you using?

In the future, please start a new topic rather than tacking onto an old one. Also please read viewtopic.php?f=1&t=9620

[seanspotatobusiness]

I'm using Windows 7 and ImageMagick version is 6.8-7.6 Q16 x64 2013-11-07.

I thought my query was still relevant to the older thread because although the solution of looping over directories was mentioned, there was no indication of how that should be done.

[snibgo]

IM contains a "mogrify" command for processing multiple files files in one directory, but it won't walk a directory tree. So you need to use an operating system facility for that.

I would use "for" to get individual files, and "convert" to convert one at a time. Type "for /?" for help. For example, at the command line:

Code: Select all

for /F %F in ('dir /b /s *.tiff') do echo %~dpF %~nF

Instead of echo, you would have a convert command, which would depend on exactly what you want to do. For example "convert %F -compress LZW %F" would compress each file, overwriting it. You might prefer to create copies in a separate directory structure.