VideoToolBox is a Freeware which aim is to detect codec required by AVI, MKV, QT, etc etc files.

Read more for features and download Features:
- Container support : AVI, Matroska, MPEG I, MPEG II, QuickTime
- Codecs requirements automatic detection
- File intergrity check
- Download required codecs
- Automatic, content based container format detection
- Displays movie info : Duration, streams
- Displays Video stream info : Resolution, bitrate, frames per seconds (FPS)
- Displays Audio stream info : Sample rate, bitrate, number of channels
- Calculates video quality factor
- Ability to burn CDs/DVDs (requires CopyToDVD)
- Windows Shell Integration (Drag'n'Drop and Context menu)
- International support
- And much more !

What's New:

- "Play" feature
- "Export" feature
- GUI Layout

Download: VideoToolBox 0.9.6.46