From Icecream Apps:
Icecream Media Converter is a free program for changing the extensions of media files. The program supports batch conversion and allows users to convert media files in a bulk from the queue. It's possible to use special settings to prepare a file for using it with a certain player or device. Icecream Media Converter supports the following formats: Video: FLV, SWF, VOB, RMVB, M4V, M2TS, MTS, MKV, MP4, AVI; audio: WAV, AIFF, AAC, MP3, WMA, OGG, M4A, FLAC, VOB Audio. It's possible to select a desired format from the list or allow the program to set a suitable format automatically after specifying a target device (iPad, iPhone, iPod, Apple TV, Sony PS/PSP, Android tablet, Samsung devices, Android phone, Nokia smartphone, Xbox, Blackberry, and even some old mobile phone models). There are 4 quality options: best, good, average, and bad, where "Best" stands for original quality and "Bad" - for lowest quality and size. The program converts video to video, video to audio, and audio to audio; it's possible to queue multiple files and convert them in a bulk. Icecream Media Converter comes with an in-built YouTube downloader which allows the users to convert videos from YouTube URLs.