.ASF File Extension
File TypeAdvanced Systems Format File
This file is saved in a binary format, which requires a specific program to read its contents.
An ASF file is a media file stored in the Advanced Systems Format (ASF), a proprietary video and audio container format. It contains audio and video data and optionally metadata, such as title, author, and copyright bibliographic data. The file is developed by Microsoft primarily for streaming media.
ASF files specify the structure of the audio or video stream, but not the encoding method. They often contain Windows Media Audio (.WMA) or Windows Media Video (.WMV) data. They can be compressed using a variety of video codecs.