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Hi everyone,

One of my video blog viewers asked me for an explanation of various 
quicktime compression techniques I use to make my online videos smaller 
for different audiences. I've just published my response:

In this demonstration, I start with a 10 megabyte video shot in avi 
format, 30 frames per second, 640x480 pixels, 16 bit stereo. I then 
produced seven compressed versions of it, including ones that utilize 
varying frame rates, screen sizes, compression codecs, and audio 
compression.  The most compressed version I created is 97% smaller than 
the original avi video, and is potentially quite suitable for video 
blogging in low-bandwidth situations around the world. Some examples:

Original uncompressed video (10 megs):

Significant compression (1.8 megs, 82% reduction):

Extreme compression (292 bits, 97% reduction):

Here's a chart featuring all of the videos and their settings:

Anyway, I hope this is useful for those of you exploring the world of 
video blogging.


Andy Carvin
acarvin (at) edc . org
andycarvin (at) yahoo . com

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