MediaInfo - MediaInfo is a convenient unified display of the most relevant technical and tag data for video and audio files
VideoSpec - VideoSpec is a free AppleScript studio App (Xcode 3.
GSpot - GSpot is a Windows-based freeware designed to identify codecs used in video files.
MediaInfoXP - GUI for MediaInfo, an open source tool for displaying technical information about media files.
CodecInstaller - Ever had a movie where you could only hear the sound and there were no video?
Media Info+ - For Windows 10 Desktop.