Multi-Model Digital Video Library

Professor: Professor:

Michael LyuMichael Lyu

Member:Member:

Jacky MaJacky Ma

Joan ChungJoan Chung

Multi-Model Digital Video Library

LY

U9904

Multi-Model Digital Video Library

OutlineOutline

• Works of First Semester

• Progress and New Feature

• Evaluation

Works of First SemWorks of First Sem

System ModelSystem Model

•Building Video Databases

•Indexing the Video Contents

•Breaking the Video into Segments

•Retrieving Video

JMPlayerJMPlayer

•Standalone Java Application

•Play video files over network

•Synchronized script

•Practice for playback of video

Our Progress & New FeatureOur Progress & New Feature

AppletApplet

• Browser-enabled

• Integrate with browser’s Chinese environment

• Thumbnail Library Interface

• Streaming playback of video

• Build upon functions of JMPlayer

Query PanelQuery Panel

•An interface for user query and searching

•Under construction

•Will have•full-text script search•keyword search•title search•metadata search•catagory

Library PanelLibrary Panel

•An interface for user to choose a video

among the query result•Features

•Thumbnails•MouseOver description•Similarity Scoring

Player PanelPlayer Panel

•The interface for video playback

•Features•Synchronized script•Play control•Sound control•Video infomation

JMFJMF•Platform-neutral multimedia solution

•Support different network protocols

•Support for capturing and storing media data

•Support sending or receiving media streams in real-time

•Customizable Data Source and Controller

Query ServerQuery Server

• Use XML to keep the records

• Use JAXP’s DOM model to implement the data structure

• Load XML records when the server starts

• Multi-threaded to handle multiple requests

XMLXML

•Plain Text•Data Identification•Inline Reusabiliy•Easily Processed•Hierarchical

•Usage•Traditional data processing

•Document-driven programming

•Archiving

•Binding

JAXPJAXP

•XML supplies a universally portable structured data format, and Java technology supplies universally portable code

•JAVA API for XML Parsing (JAXP) provides basic functionality for reading, manipulating, and generating XML

documents •SAXParserFactory and DocumentBuilderFactory that give you a SAX parser and a DocumentBuilder

SAXSAX

•processes XML data like a text stream and alerts the application whenever something interesting comes along

•read-only system

•event-driven protocol

•takes little memory

•tends to be fast

•simply reacting to things, one at a time, as they come along

•lack of an in-memory data structure

DOMDOM•A Document Object Model is a garden-variety tree structure, where each node contains one of the components from an XML structure

•document builder reads the XML data and then constructs a DOM

XMLXML

•tree structure of data•plain text format•easy to maintain and debug•fields and attributes

•video and id•title•keyword•script•line and time•iconsrc•videosrc

System OverviewSystem Overview

Applet

XMLXML

Query Server

User

VideoLibrary Database

Use browser to run,Input query

Send query to

JAXP read the XML,ready for request sendfrom client server

Video records

Video Icons shown

click one of the icon

Retrieve the video

video playback

EvaluationEvaluation

JMF vs. QuicktimeJMF vs. Quicktime

Choose JMF instead of QuickTime as our tool for video playback:

• Platform Independence– QuickTime is mainly for Macintosh and Windows

• Difficult for integration with other Java tools– Java tools not support QuickTime, but JMF is a

package of Java

• Consideration of Time to Study QuickTime• Disadvantage of JMF

– The JMF API is not included by Java Runtime Environment, Java plug-in is needed

Database vs. XMLDatabase vs. XML

• XML is plain text

• Client/Server and Server/Server communication is easy and convenient by sending the whole XML file between the two objects

• Much difficult for the communication of two database servers

• XML is vender independent

ProblemProblem

• Chinese Capability

• Low performance Machine may not have smooth video playback

Works to be finishWorks to be finish

• 70+ video clips in library

• Fully functional demo

• Fine-tuned user interface

• Bug-Fix!