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Animated Graphics
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Downloaded Media

Moderate rating

Downloaded media include media files of all types. These files are audio and video clips that must be downloaded onto a hard drive before being played. Generally, the advantage to downloaded files is in their superior audio and image quality as well as in larger resolution capabilities. However, the length of the media files usually is very short due to file size. Larger files increase download times dramatically and take up space on the hard drive.

Examples of Uses QuickTime movies (.mov) and WAV (.wav) audio files are two common types of files seen on the Internet. Others include MP3 audio, MPEG video, AVI, and VDO.

Requirements for Using it on a Computer To play back downloaded media files there are several shareware and freeware solutions. Downloading the latest QuickTime player or RealPlayer will allow the user to play all the aforementioned file types. Windows 98 Media Player 2 plays most file types as well as a host of other free and shareware programs. Hardware recomendations include a Pentium-class PC with MMX technology or a Macintosh PowerPC with a sound card and speakers. A fast connection to the Internet is also recommended.

Requirements for Using it to Create Materials Recording, digitizing, and encoding media files is difficult and time-consuming; it requires professional equipment and expertise at all levels.

Hardware
On the Apple platform, a Power Macintosh running at speeds of 200 MHz or better or preferably a G3 Macintosh is suggested. On the PC platform, a Pentium II or better running at no less than 200 MHz is required. No less than 96M of RAM (random-access memory) is strongly suggested, especially for video capture. It is not uncommon to have 300M of RAM on capturing stations. A very high-quality graphics card is also helpful. A video and/or audio capture card is required with the proper cabling to connect to a VCR, CD player, microphone, cassette player, or whatever the media source may be.

Software
Various compression schemes and encoding software are used to create video and audio for the Web. Generally, video and audio are captured uncompressed and then processed for the Web. Most capture cards come with their own capture software, but other more costly programs such as Adobe Premiere work with many cards and also allow for high-quality editing features. Similarly, audio programs such as Sonic Foundry's Sound Forge offer high-quality features. Once the video or audio is captured, the media has to be encoded and compressed for the Web. Other programs, such as Media Cleaner Pro from Terran Interactive, offer more versatile and higher-quality encoding. Lastly, RealNetworks provides a range of products, including free encoders, that can be used in conjunction with Web delivery of audio and video formats.


Examples in Module 1
Collaborative Learning: Anthropology
Presentations by Students: Media Studies
Virtual Labs and Field Trips: Geology

 


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