MediaInfo

Product: MediaInfo v0.7.27
Website: http://sourceforge.net/projects/mediainfo/
Type: Open Source
Requirements: Windows XP/Vista/7

Get technical information and tags of a lot of multimedia files. 

Supported formats -
Video: AVI/OGM/MKV/MPG/VOB/MP4/3GP
Audio: MP3/OGG/MKA/MP4/AAC/