Thank you therube.
Actually I had tried that but after your replying I tried again. My problem that I couldn't easily understand script things. Maybe if there's very large project like 10 TB, I try to fiddle.
Now, I found a way. Very gui method
Q-Dir! This software great works. There's a tutorial about it:
https://www.softwareok.com/?page=Windows/Tip/Q-Dir/281 - Download, unzip and start Q-Dir portable. Download link:
https://www.softwareok.com/?Download=Q-Dir2 - Navigate the directory
3 - From dropdown menu: Extras > Data size information > Show Q-Dir internal size information
4 - And activate the column length. Move the column next to the name.
5 - Hold down the Ctrl key and and briefly click on the "Length" column with the left mouse button.
6 - MAGIC HAPPENS. It will generate the lengths of audio/video files with sub-directories.
7 - From dropdown menu: File > Export
8 - Exported text is formatted tabbed. You can easily edit any tabbed text editor or spreadsheet. Create a text file formatted like OldFolderName
| NewFolderName
9 - Use Bulk Rename Utility. Actions > Import Rename-Pairs. MAGIC HAPPENS.
Thanks all developers for these freeware solutions.