iSkysoft Studio for is a decent software for Mac
It also has the ability to convert the videos or even existing MP4/FLV/WebM videos to fit iPod, iPhone 5, iPad 2, PSP among other devices.After conversion output quality is decent. You can extract only audio version of videos. It is a powerful software for Mac users to easily videos. Software is fully compatible with Mountain Lion. Normally software costs $29, the developer is giving away unlimited licences for only two days, grab your copy now.