Chapter 10

The Role of Video in Multimedia  Any presentation or application that uses sound and graphics qualifies as multimedia  Clip A segment of video (or audio) recording  Real time When a video signal is broadcast live an unedited

Video Quality  Frame A single image in a video or animation  Frame rate The speed at which video frames appear on a display, measured in frames per second (FPS) The higher the frame rate, the smoother and sharper the video display

Streaming Video  Streaming video A technique for transferring data so that the browser starts displaying the data before the entire file has been transmitted First made popular in 1995 by RealNetworks

Video File Formats  Movie (MOV) Introduced by Apple in 1991 Developed for QuickTime video player Also known as the Quicktime movie format High-quality format that compressed video significantly without losing too much quality

Video File Formats  Windows Media Video (WMV) Developed by Microsoft for its video player software Closely related to WMA (which is only for audio) Not played well by all systems Recent versions include more security measures ○ Digital Rights Management (DRM) ○ Prevents unauthorized duplication

Video File Formats  Audio Video Interleave (AVI) Introduced by Microsoft in the early 1990s for Windows Not a streaming video format, so if you are playing it from a Web site, you need to download the entire file before viewing Can be played by most video players Because of the structure of the format, a player that supports some AVI cannot necessarily play all AVI files Has a strong Internet presence

Video File Formats  MPEG (Moving Picture Experts Group) Compresses audio and video Can be used with streaming Good for networks Constantly evolving

The “Future” of Video in Multimedia  Full-screen streaming video ✔  High-quality video without massive file sizes ✔  Higher resolution and frame rates in video from digital cameras ✔  High-definition television (HDTV) on the Internet ✔  Operating systems that include video conferencing software ✔

Video Player Software  RealNetworks’ RealOne (now called RealPlayer)  Apple’s QuickTime  Microsoft’s Windows Media Player  Adobe Flash Player*

Video Editing Software  Window’s Movie Maker  Apple’s iMovie  Apple’s Final Cut Pro  Adobe Premier  Batch processing Allows you to generate low-resolution thumbnails of each frame, which remain linked to each corresponding high-resolution frame, which speeds up the offline video editing process

Video Devices  Video cameras  Video Capture Cards Convert analog video (such as films from a VCR) to digital format  Video Tuners A circuit board that enables it to receive television signals