A VOB file is normally known as a DVD Video Object file, and is one of the most common formats for storing video and audio streams on DVD discs. The VOB format also may denote a Vue d'Esprit object, which is a 3D model created for use within the application. A VOB file contains video streaming in MPEG-2 format and audio streaming in one of several formats.
VOB files are a container, which consist of 3 things. They consist of video, audio and subtitle streams. The video stream is in MPEG-2 format, the audio however can be in various forms such AC3 - which is the most common, MPEG-2 multichannel, MPEG-1 Layer 2 dual channel or PCM format. The reason AC3 is the most common is that it offers a good compromise between quality and bitrate.
Adobe Flash Player (standalone program) Web browser with the Flash plug-in installed
WMV files are a type of video file (usually containing audio) from Microsoft. These files can be played on a variety of video players on both Mac and PC machines. Some WMV files may have digital rights management (DRM) protection which prevents users from making unauthorized copies of files purchased in online stores.
Windows Media Video (WMV) is a compressed video file format for several proprietary codecs developed by Microsoft. These files are based on the Microsoft Advanced Systems Format (ASF) container format encoded using the Windows Media Video (WMV) codec.
MPlayer Microsoft Windows Media Player PowerDVD RealPlayer VideoLAN VLC Media Player