Windows Media Format is the most comprehensive, highest quality, secure digital media format that is available for streaming and download-and-play applications on computers, set-top boxes, and portable devices.
Download the ASF SpecificationLearn how to create or read Advanced Systems Format (ASF) structured files.
Get the ASF Viewer 9 SeriesInspect the contents of audio and video files to make sure they meet the requirements of the ASF specification.
