Educational Uses of Digitized Video
Digital video:
is analog video whose signal is captured in a format
which is recognized by a computer.
How do you capture digital video?
You will need a computer which has A/V capabilities. This means at a
minimum you will need a computer with a video capture card and sound card.
You will need at least 8 MB of RAM.
HyperVideo:
is digital video which is linked in some way to other videos
or media. Hypervideo is a hybrid of interactive video and is commonly interchanged
with the term.
Interactive Video:
allows for user interaction to decide the course of
the video.
Other design attributes of digital video:
- Frame size:
- 160X120(Quarter screen)
- 320X240(Half screen)
- 640X480(Full screen)
- FrameRate
- 15 fps
- 30 fps(real motion video)
- Compression:
- Cinepak
- Indeo
- Video
- Radius
Raw digital videofiles are very large (like 70-100MB). They usually don't
fit on one disk. Some options are: Zip drives or Magneto Optical drives. Zip
disks store 100MB and MO disks store 1.3 gig. You can also use a server
for storage. Compression will make the files smaller, but still anticipate them
be relatively large. There are no absolutes and file size depends on the content
of the video.
- Format
- Quicktime (Mac or Windows)
- AVI(Audio Video Interlace)
- MPEG(Motion Picture Engineering Group)
Full Motion/Full Screen - Broadcast Quality Playback
- Digital video files tend to be LARGE -- approx. 1 MB/15 secs.
Playback over networks -- approx. 1-2 mins tranfer rate per 1-2 MB
Video Conferencing permits the real-time exchange of digital video. Depending
on the conferencing software and/or hardware, your frame rate and playback will
vary.
Quicktime(1.0,2.0,2.1):
- Is a compression format for video that's available on all Mac's and PC's.
- In html, you script it as <a href="nameofmoviefile.mov"></a>
Quicktime plug-infor viewing & embedding
- Plug-in is a helper applications that works inside of Netscape. (It's
not launched externally)
- You can find more information at http://www.netscape.com
Here you'll be able to find out how to script using this Quicktime
version.
Director/Shockwave:
- More information at: http://www.macromedia.com
- Director is a scripting language, software created by Macromedia
- Shockwave is a way to take a Director file and save it in an
Internet format.
- Afterburner is the converter you use.
- The strength of Shockwave is that it allows for hypermedia navigating
and animation.
- examples of Shockwave files can be found on the Macromedia site, go under
Galleries.
JAVA:
- created by Sun Microsystems.
- NetScape 2.0.1 fixes some of the JAVA bugs.
- a language that is close to C programming, gives the author control
over what's happening.
- cgi scripts embedded in html documents so instead of going to a Web
servers, you can let the local computer do the computing.
- for more info: http://www.javasoft.com
- Microsoft is coming out with something similar to JAVA called
Blackbird,it's based on Visual Basic - it's not officially released.
Virtual Reality Markup Language (VRML/WRL):
http://www.sgi.com
Created by Silicon Graphics
WebSpace http://webspace.sgi.com/
Is a helper application
- move objects in space
- move yourself through the space