mng2png

mng2png - convert MNG to PNG(s).

This was made because convert kept freezing my computer when I tried to convert MNG files to PNGs. This seemed easier than trying to figure out the issue with convert.

Usage

Each frame of the MNG video is converted into a PNG using 32-bit RGBA, which is color type 6 and bit depth 8. Note that endlessly-looping MNG files are NOT detected and will continue to write PNG files.

The PNG files are written in the directory that the command is executed from. They will be labeled as number.png, where number is the MNG frame number starting from 0.

Further usage details are left to the manpage, mng2png.1.

Installation

Requirements

• A C99-compliant compiler.

• libmng compiled with support for reading and displaying.

  • Tested with version 2.0.3.

• libpng compiled with support for writing.

  • setjmp() is used if support is compiled for it.
  • Tested with version 1.6.37.

The dependencies are not bundled with this source.

Building

make all

A Makefile is supplied to automatically build, if make is supported on your system. config.mk allows you to configure system-dependent information, such as compiler and compiler flags. The default configuration uses gcc, includes debugging symbols, no optimizations, and tells the linker to find the dependencies as system libraries.

If make is unavailable, simply compile the source with a C compiler and link against the dependencies.

Installing

make install

The Makefile provides an install rule for Unix-like systems, with config.mk having definitions for installation directories of the program and manpage.

Consult your system for installation-specifics.

TODO

See TODO messages left in source for various future considerations.