4XM File

What are 4XM files and how to open them

Are you having problems opening a 4XM file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your 4XM files.

What is a 4XM file?

A .4XM file is a 4X Movie Video file.

4X Movie Video (.4XM) files store full motion video and audio used in cutscenes or multimedia sequences inside computer and console games. These files are created by the 4X Technologies "4X Movie" system and are most often found in legacy titles such as Alone In The Dark: The New Nightmare, Britney's Dance Beat, or The Messenger, where disk space and playback efficiency were major constraints.

These files combine compressed video and interleaved audio in one container. Video is encoded with the proprietary 4XM Video codec; audio may be uncompressed PCM or use 4X's variant of IMA ADPCM, and multiple language tracks are supported. Passage through 4XM files involves demuxing tracks for playback - game engines or multimedia tools like FFmpeg perform decoding, then render video frames and audio together.

Internally the format uses a RIFF-style structure. It starts with a RIFF header including the tag "4XMV", followed by LIST chunks such as HEAD, TRK_, and MOVI, which in turn contain subchunks defining video and audio track formats (vtrk, strk) plus frame data (ifrm, pfrm, cfrm). Little-endian byte order is used throughout.

How to open 4XM files

We have identified one 4XM opener that is compatible with this specific type of 4XM file.

Programs that open 4X Movie Video files

Last updated: August 5, 2026

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about 4XM file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.