convert_aiff_to_mp3.js

var spawn = require('child_process').spawn;

var input      = 'test.aiff';
var output     = 'test.mp3';
var named_pipe = 'pipe';

var fifo = spawn('mkfifo', [ named_pipe ]);

fifo.on('exit', function() {
    var mplayer = spawn('mplayer', [ input, '-ao', 'pcm:file=' + named_pipe ]);
    var cat = spawn('cat', [ named_pipe ]);
    var ffmpeg  = spawn('ffmpeg', [ '-y', '-i', '-', output ]);

    cat.stdout.on('data', function(data) {
        ffmpeg.stdin.write(data);
    });

    cat.on('exit', function(){
        ffmpeg.stdin.end();
    });

    ffmpeg.on('exit', function() {
        spawn('rm', [ named_pipe ]);
    });
});