mngToPngs is a tool for converting .mng video
files to a sequence of .png images.
Specifically, it’s a quick-and-dirty JavaScript file for converting videos
recorded in MAME using the -mngwrite command-line
option. It supports no more of the .mng format than it needs to for this
use case, and may not work with .mng files created outside of MAME.
On Unix-like systems (tested only on macOS), ensure that Node.js is installed, and use the command:
./mngToPngs.mjs inputFile.mng outputDir
...to create a directory named outputDir, and fill it with a sequence of files like:
inputFile_00000.png
inputFile_00001.png
inputFile_00002.png
...
mngToPngs is in the public domain.