Monday, December 1, 2008

Video on the Web

Formats
3 Common formats for video on the internet are:
Flash Video, .fla / .flv / .swf
MPEG Version 4, .mp4
Quicktime, .mov

Compression
Video needs to be compressed for use on the web because of bandwidth limitations. Video files contain large amounts of image and audio data and as such require a high bandwidth to be transmitted to a user’s computer. Compression reduces the size of video files, and especially so with MPEG-4 and MPEG-8 compression, allowing internet users to stream video far more effectively.

Compression Codecs
3 common compression codecs are:
H.264/MPEG-4 AVC
DV/DVCPRO- NTSC
DV – PAL

Video Footage
This is an example of video footage: http://au.youtube.com/watch?v=xjWaLy74nuo
The compression used is H.264, the frame rate is 24fps, the resolution is 640 x 480 NTSC, and the format is .mov

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