Mobile Media Converter is a free, cross-platform and easy using multimedia converter / cutter / cropper developed by MIKSoft, it allows to perform conversion between a wide quantity of audio and video formats, for example, amr( Adaptive Multi-Rate ) to mp3, mp3 to amr, 3gp to mp4,… etc.

Features
- The supported input media formats include: amr, awb, mp3, wav, wma, 3gp, mpeg, mpg, wmv, avi, ogg, flv, mp4, aac, m4v, mp4, mov, 3gp, 3g2, m2v, rm, ra, ram, rv, rmvb, mkv.
- The supported output media formats include: amr, 3gp, mp3, wma, wav, avi, mpeg1/2, wmv, mov, PSP video with subs, iPhone/iPod video with subs, HTC desire video with subs, ogg, iPhone ringtone, PSP video, flv, WebM video, Android video, MP4 video with subs, Xvid video with subs, Apple iPad video with subs, Android video with subs, Palm Pre video with subs, Sony Ericsson Xperia X10 video with subs, Sony Ericsson Vivaz video with subs.
- Many parameters customizable: audio bitrate, audio frequency, audio channels, audio codec, video bitrate, video fps, video size, video codec.
- Auto detect subs.
- Allow to trim/cut the video/audio clip via the right button context menu.
- Allow to crop the video clip and change the aspect ratio via the right button context menu.
- Support batch conversion.
Mobile Media Converter works on Windows 7, Windows XP, Mac OS X and Linux, etc.
More Reading
Mobile Media Converter is a 10.7MB download available from the developer’s website and CNET( Windows version ).

Amazing software! Just did the job with no hassles.. Recommended.