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Old 23 Apr 2002, 04:03 AM   #1
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Default Make your own bit rate calc

Hi all for my first post....

For the final in my java programming class, we got to pick what we could write. I've decided to write a java based mpeg/divx4/divx5/svcd/vcd bit rate calculator. I've got the basic code and gui layed out, but I need to no compression rations for each. The variables that can be manipulated are length of movie, audio bit rate, video bit rate, and of course the codec used. I'm torn about putting in resoultion, but I only have a weeks time to code it and am somewhat of a beginner. Anyway, anyone know the compression ratios for Divx/Mpeg2(svcd)/Mpeg1(VCD), Divx4 and Divx 5? Any websites where I can find this info? Any other calc source code I can look at and get ideas from? If anyone wants, I'll send the source to you after I"m done.
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Old 23 Apr 2002, 04:20 AM   #2
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Calculating bitrates are relativly simple, resolution isn't directly related to the bitrate, but using the bitrate and the resolution you can calculate the bits per pixel value, which is important when selecting the resolution.

The wef posted the formulas he uses for GordianKnot in this thread

http://forum.doom9.org/showthread.php?s=&threadid=22714
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