CmdLineParser parser = new CmdLineParser(this);
parser.setUsageWidth(80); // width of the error display area
try {
parser.parseArgument(args);
} catch (CmdLineException e) {
System.err.println(e.getMessage());
System.err.println();
// print the list of available options
System.err.println("java -jar smooth-streaming-fragmenter-version.jar [options] in_1.mp4, in_2.mp4, ...");
System.err.println();
parser.printUsage(System.err);
System.err.println();
System.exit(1);
}