Transcript Video Conferencing over Intranet

Video Conferencing-introduction
--- IT Acumens. COM
Video Conferencing-introduction
•
Video conference is a means of communication
where text ,audio and video are transmitted and
received in real-time
•
The project “Video Conference Over Intranet
Using RTP” is a software package to make a
conferencing facility between two or more
computers connected over a Network
Aim of the Project
This project aims at developing a
software package for making video
conference by using java media
framework, swings for graphical user
interface applications, jdbc and MS-Access
database for information storage.
WHY ANALYSIS
There are a variety of softwares existing for
Video conferencing over Internet, but not so for
Intranet. Some product for Intranet exists but
not well known. Most of the systems do not
provide proper authentication. No proper
hierarchy is maintained.The existing systems are
not suitable for official use in an
Organization.Some existing systems like netmeeting can be used only in windows .
HARDWARE
AND
SOFTWARE
SPECIFICATION
HARDWARE REQUIRMENTS

Processor
-
Pentium II and above

Hard disk
-
minimum 100 MB

RAM
-
64 MB or higher

Capture Devices
-
Webcam
, Headphone and
Speakers
SOFTWARE REQUIRMENTS
Platform
:
 OS
:
2000/NT/XP
 GUI
:
 Database
:
 Media Package :
 Protocol
:

Java
Windows
Swing
MS Access
JMF 2.1.1
RTP
Video Conferencing Over IntranetDiagram
A1
Text/
Audio/
Video
Accept/invite
A2
Coordinator
A3
A4
Conference Path
Video Conferencing Over LAN
THE JMF
JMF is JAVA MEDIA FRAMEWORK . It is Fundamentally an
API for handling audio and video. Java Media Framework
(JMF) provides a unified architecture and messaging
protocol for managing the acquisition, processing, and
delivery of time-based media data. JMF is designed to
support most standard media content types, such as
AIFF, AU, AVI, GSM, MIDI, MPEG, QuickTime, RMF, and
WAV.
The Java Media Framework API (JMF) enables audio, video
and other time-based media to be added to Java
applications
FUNCTIONS OF JMF
Media handling:
o
Play
o
Capture
o
Transmission
o
Processing
JMF SUPPORTS
*
Static media
*
Streaming media
Media Processing Model
Using Java Media Framework
JMF contains lot of classes for
transmission of video frames.
 Using JMF a PushBufferDataSource, is
created. It contains streams of type
PushBufferStream,which typically
generates audio/video data that is
organized as frames, rather than a
continuous stream of bytes.

Processing and Presenting a Time
Based Media
Processing and Presenting a Time
Based Media
Playing and capturing audio and video
with JMF requires the appropriate input
and output devices such as microphones,
cameras, speakers, and monitors.
 Data sources and players are integral
parts of JMF's high-level API for managing
the capture, presentation and processing
of time-based media.

JMF Processor Model
PLAYER
An object for rendering (playing)
and controlling (e.g., stopping, changing
rate of play) a media object.

A Player processes an input stream
of media data and renders it at a precise
time. A DataSource is used to deliver the
input media-stream to the Player.The
rendering destination depends on the type
of media being presented

PLAYER STATES
A Player can be in one of six states. The
Clock interface defines the two primary
states: Stopped and Started. The five
steps before starting are
Unrealized
Realizing
Realized
Prefetching
Prefetched.
PLAYER STATES
Protocols for Streaming Media
The internet standard protocol for transporting
real-time data such as audio and video is the
real-time transport protocol (RTP).
Real-time transport protocol :
RTP provides end-to-end network delivery
services for the transmission of real-time data.
RTP is network and transport-protocol
independent, though it is often used over UDP.
Receiving and Presenting RTP
media streams

JMF players and processors provide the
presentation, capture, and data
conversion mechanisms for RTP streams.

A separate player is used for each stream
received by the session manager.
MODULES

USER INTERFACE

CAPTURING THE MEDIA

PROCESSING THE MEDIA

TRANSMISSION OF THE MEDIA
USER INTERFACE
The user interface is designed using Java Swing
 The user interface is very user-friendly
 Admin user can add new user to the system
 The userdata table has four fields
1.userid
2.username
3.password
4.role

Capturing the Media
JMF is used to capture media data from
the capture devices
 A data source is then created for the
captured media
 Then a Player is created using the
DataSource
 The Player is then stared to begin the
capture process

Processing the Media
* The next step in the project is processing the captured
media.The captured media may be of any format. JMFRTP API supports all major audio and video formats.The
format used in this project id .rtp format which is
supported by ths RTP.
* Format is set by using the setFormat method :
setFormat( new Format(Format,Hz,bits(8 or 16),mono
or stereo(1or 0))
* The captured stream is converted into packetized .rtp
format .The audio and video streams are captured
separately and processed separately
Transmission of the media
Media is transmitted over the network
using JMF-RTP API
 Each media is transmitted as separate
sessions.
 The rtp packets are transmitted to a
multicast address.from which it is
transmitted to the destination.

Conclusion
This project has been successfully developed using the
standard software development strategies that is
followed in the Industry. I hope that this system
would help the VIDEO CONFERENCING
APPLICATION users fulfill their requirements and
vendors able to satisfy their customers
This project has so many useful features, unlike the
existing system which is very much restricted in its
operation.
Also be noted that by this setup,the telephone
connection,given to each employees through
exchange shall be free for getting external calls.