SVR is free and open source software for renaming videos and subtitles
Features:
Group renaming (deleting, inserting, serialization, replacing and case),
Drag n Drop file (supported video files avi, mp4, mkv, wmv, and supported subtitles files are txt, sub, srt),
Renaming by video file name, or by Subtitle file name,
Cross platform application, it works on Windows, Linux, Unix, Mac OS,
Renaming large number of files
Multilingual (thanks to Yuri Bongiorno)
English
Italian (thanks to Yuri Bongiorno)
Serbian
Hungarian (thanks to Csernai Árpád)
French (thanks to Soopa)
Turkish (thanks to Gökhan Atış )
NOTE:
For version 0.6.0 and newer please install Visual Studio Redistributable (x86)
you can find it on https://visualstudio.microsoft.com/downloads/ under 'Other tools and Frameworks'
From version 0.5.1 please install Visual Studio 2015 Redistributable (x86)