video images,animation and full motion video in multimedia
TRANSCRIPT
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
3
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…