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This is the Movie Thumbnailer GUI PLUS by Hvcoabtap project ("mtnhgui")
This project is hosted by SourceForge.net. The project team describes it as:
Simple Graphic User Interface for Movie Thumbnailer command line program. Include mtn for windows as redistribution. PLUS version include FFMpeg GUI develop (command line program as redistribution) for simple video encoding - editing. Choose your version in files section. Version for XP can't installed on Windows 8 (library for image preview compatibility problem). More "plus" features and usability developping in my "Movie Evolution" project at sourceforge: http://sourceforge.net/projects/movievol/ ffmpeg section: some option are enabled if video or audio codec isn't set for copy stream (e.g using 'crop' video)
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