The File Extensions Database


.M1S File Extension

  • Developer by: Adobe Systems Incorporated
  • Category: Digital video and movie Files

What is an .M1S file?

.M1S is MPEG-1 system stream

The m1s file extension is container format for multiplexing digital audio, video in MPEG-1 multimedia file format.

The m1s file contains multimedia data. It used to streaming to digital devices.

This m1s file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.


How to open:

Use compatible tools to playback *.m1s files.

How to convert:

Compatible tools are able to export m1s files to other formats.

How to solve problems with M1S files

  • Associate the M1S file extension with the correct application. On :
    Windows: Right click on any M1S file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.M1S files". Mac: Right click (or Ctrl-click) the M1S file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .M1S is MPEG-1 system stream. Because only the current version supports the latest M1S file format. Search, therefore, e.g. on the Adobe Systems Incorporated manufacturer website after an available .M1S is MPEG-1 system stream update.
  • To make sure that your M1S file is not corrupted or virus-infected, get the file again and scan it with antivirus software.