ASF File Documentation

Overview

Feature Value
Format Name Advanced Systems Format (ASF)
Developed by Microsoft
Initial Release 1998
File Extension .asf
MIME Type video/x-ms-asf
Specification Open Specification
Container for Audio, Video, and Text Streams
Streaming Support Yes
DRM Support Yes, through Windows Media DRM
Common Codecs WMA, WMV
Standard ISO/IEC 14496-12
Error Correction Support for error correction mechanisms
Metadata Support Rich metadata including author, title, album, and genre
Maximum File Size Practically unlimited (subject to file system limits)
Network Efficiency Designed for high efficiency over networks
Index Support Supports indexing for fast seeking
Language Support Support for multiple languages in a single file
Playback Control Supports commands for controlling playback such as start, stop, and pause
Extensibility Highly extensible with custom-defined objects and codecs