video images,animation and full motion video in multimedia

Video Images &

Animation & Full

Motion Video

Presented By :

Sindhu . M

Mca ~ 2nd Year

Video Concept

Video is an excellent tool for delivering

multimedia.

Video, like sound, is recorded and

played an as analog signal

Analog video must be digitized in order

for it to put into a multimedia file

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Analogue Video

Video information that is stored using television

video signals, film, videotape or other non-

computer media

Each frame is represented by a fluctuating

voltage signal known as an analogue wave form

or composite video.

Digitizing Video

Digital video is often used to capture content from

movies and television to be used in multimedia.

A video source (video camera ,VCR, TV or

videodisc) is connected to a video capture card in a

computer.

As the video source is played, the analog signal is

sent to the video card and converted into a digital file

(including sound from the video).

Analog-To-Digital Converter (ADC)

VCR

Video Overlay Board /

Video Capture Card

PC

Video is edited using

video editing software

Video Concept

Several elements determine file size:

Frame rate

Image size

Color depth

To determine file size use the following

formula:

Frames per second X image size X color

depth / 8 = file size

Video Compression and

Editing

There are two types of video compression

Lossless – preserves the exact image

throughout the compression

Lossy – eliminates some of the data in the

image (provides greater compression ratios

than lossless)

Remember – there is always a trade off, file

size versus image quality

Video on the Internet

There are two types of video transfer over

the Internet

HTTP (Hypertext Transfer Protocol) –

downloads the entire video to the hard drive on

the user’s computer

RTSP (Real-Time Streaming Protocol) – is a

continuous-playing, streaming technology in

which the user’s computer is in constant contact

with the server playing the video

Animation

Animation is the rapid display

of a sequence of images of 2-D

or 3-D artwork or model

positions in order to create

an illusion of movement.

The effect is an optical

illusion of motion due to the

phenomenon of persistence of

vision, and can be created and

demonstrated in several ways.

Animation

Animation on the Internet

Animation is an excellent way to provide

appeal on a web site, choose from the

following

Animated text

Animated GIF’s

Marcomedia Director applications

3-D environments

AnimationAnimated text – using the HTML <blink>

command causes text to flash on and off

Animated gif – using a software program to

create a series of gif files such as GIF

Builder

Director movie – animation played

using Shockwave plug-in

3-D environments – a computer language

used to create 3-D images

2-D Animation

Two types of animation exist

Cel animation – based on changes that occur

form one frame to the next

Path animation – moves an object along a

predetermined path on the screen

Cel Animation

This animation moves at 10

frames per second

Path Animation

A path animation controls the position and

rotation of an object along a curve.

3-D Animation

3-D Animation involves three steps

Modeling – creating the broad contours and

structure of 3-D objects and scenes

Animation – defining the object’s motion

Rendering – giving objects attributes such as

color, surface textures, and amounts of

transparency

3-D Animation Special

Effects Morphing – blending together two images

into a series of images

Warping – distorts a single image

Virtual Reality – creates an environment

that surrounds the user so that he or she

becomes part of the experience

Full Motion Video

A Full-Motion Video (FMV) is the rapid display of a

series of images by a computer in such a way that the

person viewing it perceives fluid movement.

The most common use of the term "full-motion video"

refers to the use of pre-recorded or pre-rendered videos

in games for computers or video-game consoles.

Full-motion video technology also can be used to display

movies, television shows, instructional videos or

educational videos on a computer

Pictures in

motion

Thank You…