Batch Conversions

Yoinked this from eHow.
http://www.ehow.com/how_5150630_batch-change-file-extensions.html

Totally handy, for example for renaming stupid panasonic .MOD files to .mpeg for video editing.

1
Move the files you want to augment into the same folder or directory. All these files need to have the same extension.

2
Open the Notepad program and type the command line ren *.123 *456. Replace .123 with the name of the current file extension. In place of .456 type the name of the new extension.

3
Save the Notepad file as rename.bat in the same folder as the files you want to amend. Make sure the file is saved as all files instead of text documents.

4
Run the rename.bat file by double-clicking on it. This will change the file extensions.