Video And Audio And Web Design

Question 1

3 Digital formats

Answer 1

AVI - Audio Video Interleaved
◦ Introduced by Microsoft in 1992 for Windows software.
◦ Contain both audio and video data that allows synchronous audio-with-video playback
◦ Various standards, compatibility across Macs/Pc’s and Codec.

MOV – QuickTime
◦ Good compatibility across Macs/Pc’s and IE, Firefox browsers
◦ Supports various media formats, but requires a special QuickTime driver.

MPEG-4-Motion Picture Experts Group-1998
◦ Provides high-quality audio and video over the Internet
◦ Highly compressed, , popular on Internet

Question 2

What do we mean when talking about video container

Answer 2

◦ The structure of the file
◦ Where the various pieces are stored
◦ How they are interleaved
◦ It may hold many codecs (audio and video)
◦ Identified by a file extension such as .AVI, .MP4 or .MOV
◦ Codec is a compression algorithm to encode and decode a digital stream of data, making it
more suitable for playback.
◦ A codec aims to maintain highest audio and video quality with a smaller file size.

Question 3

Why should you test a web in different environments

Answer 3

Web site design must be portable and accessible by users who have different browsers,
operating systems, and computer platforms.

Don’t assume that the pages look the same to all of their users.