How to get Technical and Tag information about a video or audio file - MediaInfo

MediaInfo supplies technical and tag information about a video or audio file.
It is free software (free of charge and free access to source code: GPL or LGPL licence)

With MediaInfo you can easily get the following information:
  * General: title, author, director, album, track number, date, duration...
  * Video: codec, aspect, fps, bitrate...
  * Audio: codec, sample rate, channels, language, bitrate...
  * Text: language of subtitle
  * Chapters: number of chapters, list of chapters

Following are the Video/Audio format supported by Mediainfo:
Video: MKV, OGM, AVI, DivX, WMV, QuickTime, Real, MPEG-1, MPEG-2, MPEG-4, DVD (VOB)...
(Codecs: DivX, XviD, MSMPEG4, ASP, H.264, AVC...)
Audio: OGG, MP3, WAV, RA, AC3, DTS, AAC, M4A, AU, AIFF...
Subtitles: SRT, SSA, ASS, SAMI...

Installation:
Ubuntu users can install it from the MediaInfo PPA:

sudo add-apt-repository ppa:shiki/mediainfo
sudo apt-get update
sudo apt-get install mediainfo

OpenSuSe:
OpenSuSe user can install MediaInfo - here