There are many different video and audio encoding formats
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Wide variation and tradeoff between quality, bandwidth needs and CPU demands for encoding and decoding
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Popular ones (Real Audio, Real Video) are not designed for audio video conferencing but rather asynchronous streaming
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Image quality requires that one take "foils" from computer and not video shots. This is impossible unless lecture delineated into "nuggets" and beginning and end of each nugget time stamped
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Need very good time synchronization between video and computer and between different participants in distance delivery
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Quality of recorded lectures is often poor and suggests need for editing
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Should one associate audio/video with a "nugget" or a lecture?
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