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Simple Video Parsing Example
In this example, we use the VideoParser object to parse the coding elements of a video file specified on the command line. We create a single event handler for all CodingElement events (essentially all of the coding elements). The handler simply prints out a string representation of each coding element encountered.using System;
using System.IO;
// Declare the MPEG2Event namespaces.
using MPEG2Event;
using MPEG2Event.Video;
public class SimpleParsingExample {public static void Main(String[] args) {}// Check for filename passed on command line.}
if (args.Length != 1) {System.Console.WriteLine("Must specify filename");}
return;
// Open the file for reading and wrap a
// BitStream object around the file stream.
BitStream bs = new BitStream(File.OpenRead(args[0]));
// Create the video parser
VideoParser vp = new VideoParser(bs);
// Register our callback
CodingElement.handlers += new CodingElement.Handler(element_handler);
try {// Parse pictures until the end of the stream}
while (!vp.EOF) {vp.parsePicture();}
catch (OutOfBitsException e) {// Handle an ungraceful end to the video stream}
System.Console.WriteLine("Video file ended without sequence end code");
// This is the callback that will process the coding element
// events as they are published.
public static void element_handler(BitStream bs, CodingElement e) {// All we do with them is print them to the console.}
System.Console.WriteLine(e.ToString());
2004.11.23-09:24.00