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- Television uses analog signal. Computer digital signal (non-continuous).
- To enable video to be handled on a computer requires digital compression (to store
video) and decompression (to display video) technologies (CODEC's -
COmpression / DECompression) include; Video for Windows (Microsoft), INDEO (Intel), MPEG
Decoder for Windows (Xing Technology)
- Full motion full screen video at 30 frames per second
(fps) using software will require a
minimum of a Pentium 90.
- Typically PC video is saved at 15 fps.
- Palettes
- Palette problems with older 256 colour displays.
- Speed
- Frames per second: In the USA NTSC TV runs at 30 fps. Computer video is usually 15 fps.
(PAL runs at 25fps)
- Capturing from the net
- Rightmouse the video and Save As
- If Quicktime or RealAudio where the producers
have save disabled, stop the file after it downloads and before it
stopsplaying, then look for the file in cache.
- Codec missing, or video conversion utilities
- Codec zone (http://gonow.to/codeczone)
- Codec central (terran-int.com/CodecCentral/GenInfo.html)
- Troubleshooting Audio and video codecs, Microsoft.
Retrieved xxx from the World Wide Web : http://support.microsoft.com/support/kb/articles/Q141/8/01.asp.
- AVI tutorial
- McGowan, J. (http://www.jmcgowan.com)
- MPEG
- Motion Picture Experts Group FAQ . Retrieved xxx
from the World Wide Web: http://www.cselt.it/mpeg/faq.htm)
Bass, S. (2001, Apr), PC video untangled, NZ PC World
137, p 21.
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- Audio Video Interleave (AVI)
- Audio and video Interleaved - standard Windows file (specified 1990).
- Uses about 1MB per second for the size shown left. (move mouse over to display)
- Quicktime
- Digital video format developed on the Apple
Macintosh platform. Used by Director (which was also developed for
the Mac)
- MPEG ( Motion Picture Experts Group)
- Named after an international
standards-settings panel responsible for creating and setting standards for various
professional grade video technology.
- MPEG2 is a video compression standard, though like Apples MOV files is ideally suited to
sound recordings.
- MPEG-3 was designed to support high definition TV but this was supported by MPEG-2
(Hence MP3 was used for a sound format).
- MPEG-4 is being worked on to allow users to manipulate audio & video (as far as I
can determine to allow for interactive/multimedia movies).
. (Millman, H. 1999, Mar)
- Advanced Authoring Format (AAF)
- Enables the exchange of media among digital production tools and content creation
applications used by Web, television, motion picture and multimedia production developers.
- Designed to replace AVI in Windows in 1999.
Busse, T (1998, Apr 13), Microsoft mutimedia
- Advanced Streaming Format (ASF) or Netshow
- RealNetworks RealAudio (RA)
- Quicktime - Virtual Reality (QT-VR)
- An extension to Quicktime allowing manipulation of
the video.
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