PL_MPEG - MPEG1 Video decoder, MP2 Audio decoder, MPEG-PS demuxer

Single-file MIT licensed library for C/C++, by Dominic Szablewski.

See pl_mpeg.h for the documentation.

Why?

This is meant as a simple way to get video playback into your app or game. Other solutions, such as ffmpeg require huge libraries and a lot of glue code.

MPEG1 is an old and inefficient codec, but it's still good enough for many use cases. All patents related to MPEG1 and MP2 have expired, so it's completely free now.

This library does not make use of any SIMD instructions, but because of the relative simplicity of the codec it still manages to decode 4k60fps video on a single CPU core (on my i7-6700k at least).

Installing

Run:

$ npm i pl_mpeg.c

And then include pl_mpeg.h as follows:

// main.c
#define PL_MPEG_IMPLEMENTATION
#include "node_modules/pl_mpeg.c/pl_mpeg.h"

int main() { /* ... */ }

And then compile with clang or gcc as usual.

$ clang main.c  # or, use gcc
$ gcc   main.c

You may also use a simpler approach:

// main.c
#define PL_MPEG_IMPLEMENTATION
#include <pl_mpeg.h>

int main() { /* ... */ }

If you add the path to node_modules/pl_mpeg.c to your compiler's include paths.

$ clang -I./node_modules/pl_mpeg.c main.c  # or, use gcc
$ gcc   -I./node_modules/pl_mpeg.c main.c

Encoding for PL_MPEG

Most MPEG-PS (.mpg) files containing MPEG1 Video ("mpeg1") and MPEG1 Audio Layer II ("mp2") streams should work with PL_MPEG. Note that .mpg files can also contain MPEG2 Video, which is not supported by this library.

You can encode video in a suitable format using ffmpeg:

ffmpeg -i input.mp4 -c:v mpeg1video -q:v 0 -c:a libtwolame -b:a 224k -format mpeg output.mpg

-q:v sets a fixed video quality with a variable bitrate, where 0 is the highest. You may use -b:v to set a fixed bitrate instead; e.g. -b:v 2000k for 2000 kbit/s. Please refer to the ffmpeg documentation for more details.

If you just want to quickly test the library, try this file:

https://phoboslab.org/files/bjork-all-is-full-of-love.mpg

Limitations

• No error reporting. PL_MPEG will silently ignore any invalid data.
• The PTS (presentation time stamp) for packets in the MPEG-PS container is ignored. This may cause sync issues with some files.
• Bugs, probably.