What Is ASF - Macgo ASF PlayerWhat Is ASF - Macgo ASF Player

The Advanced Systems Format (ASF) is an extensible file format designed primarily for storing and playing synchronized digital media streams and transmitting them over networks. ASF is the container format for Windows Media Audio and Windows Media Video-based content. The extension .wma or .wmv is used to specify an ASF file that contains content encoded with the Windows Media Audio and/or Windows Media Video codecs. The Windows Media Format SDK can be used to create and read Windows Media files, as well as ASF files that contain other types of compressed or uncompressed data.


1-To support efficient playback from media servers, HTTP servers, and local storage devices.

2-To support scalable media types such as audio and video.

3-To permit a single multimedia composition to be presented over a wide range of bandwidths.

4-To allow authoring control over media stream relationships, especially in constrained-bandwidth scenarios.

5-To be independent of any particular multimedia composition system, computer operating system, or data communications protocol.


An ASF file is organized into sections called "objects." There are three top-level objects, a Header object and a Data object (both required), plus an optional Index object.

1-Header object: It contains general information about the file, such as file size, number of streams, error correction methods, and codecs used. Metadata is also stored here. The Header object is the only top-level object that can contain other objects.

2-Data object: Containing the stream data, organized in packets.

3-Optional Index object: This one contains a list of associated index/key-frame pairs that enable applications to seek through a file efficiently. The index associated with each key frame can be a presentation time, a video frame number, or a reference time stamp.

Related Software:

Macgo Mac Blu-ray Player: Play ASF format on your Mac.

Macgo Windows Blu-ray Player: Play ASF on Windows platforms.

Macgo Free Mac Media Player: Play ASF for Mac OS X.

Related Source:

Visit Advanced Systems Format on Wikipedia.

An overview of the ASF format.

Macgo Mac Blu-ray Player is the first Blu-ray media player software for Apple Mac, which can successfully play Blu-ray Disc, Blu-ray Menu, ISO files, and BDMV folder, as well as on iOS devices. It outputs video at up to 1080p HD quality without loss of data and frame, and allows full preservation of all audio tracks, subs streams, chapter markers and videos, along with DTS5.1, you can enjoy fantastic home cinema entertainment.

BD Playback

Blu-ray Menu & ISO

World's first and NO.1 Blu-ray media player software for Apple Mac OS

Unique Blu-ray player software that supports Blu-ray Menu

Directly play Blu-ray Discs and Blu-ray ISO files without conversion. Easily play Blu-ray folders (BDMV folders) playable

Perfectly Output up to 1080p High Definition quality without loss for fantastic home cinema entertainment


Playback For Free

Free media player for DVD playback without any limitation

Play any videos or audios like .MP4, .MOV, .AVI, and .FLV, etc. on Mac without converting formats

Listen to music and view the photos without worrying about formats

Settings for video & audio tracks, adjusting the aspect ratio and player parameter of your screen.

by Becky
References and Bibliography
Macgo Mac Blu-ray Player INTERNATIONAL LIMITED has over ten years of experience in DVD Blu-ray video and has developed many DVD Blu-ray video tools with advanced technology. In the past ten years, Macgo has established itself as the innovative leader in video DVD Blu-ray technology by pioneering more performance enhancing technology.
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