.AX File Extension

DirectShow Filter

Developer Microsoft
3.6  |  74 Votes

What is an AX file?

An AX file is a DirectShow filter. Microsoft Windows Media Player and other video players use AX files to process video data streams. For example, Windows Media Player uses AX files when recording TV shows.

More Information

Microsoft DirectShow is a media-streaming architecture for Windows. Primarily, DirectShow is used by Windows Media Player, to record streaming video and audio.

AX files are part of the DirectShow architecture. DirectShow uses these files for a variety of purposes, including decoding and encoding media, parsing files, audio and video de-multiplexing, and video rendering. Windows includes several AX files, with the following names:

  • Msnp.ax
  • Mpeg2data.ax
  • Msdvbnp.ax
  • Psisrndr.ax

How to open an AX file

AX files are not meant to be opened. Microsoft Windows Media Player (Windows) and other video players use AX files as needed.

Open over 400 file formats with File Viewer Plus.Free Download

Programs that open or reference AX files

Other video player that supports video filters

Verified by FileInfo.com

The FileInfo.com team has independently researched the DirectShow Filter file format and Windows apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

If you would like to suggest any additions or updates to this page, please let us know.