Quantcast File Prediciton for PAL Always Out by about 20 mb - digitalFAQ.com Forums [Archives]
  #1  
01-25-2003, 06:32 AM
Jellygoose Jellygoose is offline
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Hi all!

I don't know why, but my file size prediction for PAL is always out by 20 MB... I use sampler=24 , and the current formula:

Predicted MPEG size = (( Total frames/MovieTimeInMinutes) / 24 ) * MPEG sample file size

The final MPEG size is always smaller than predicted...
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01-25-2003, 06:40 AM
kwag kwag is offline
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Quote:
Originally Posted by Jellygoose
Hi all!

I don't know why, but my file size prediction for PAL is always out by 20 MB... I use sampler=24 , and the current formula:

Predicted MPEG size = (( Total frames/MovieTimeInMinutes) / 24 ) * MPEG sample file size

The final MPEG size is always smaller than predicted...
That should be about right. Use the .98 factor, and that will bring it close to reality

-kwag
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02-16-2003, 08:43 AM
Kane Kane is offline
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i have made the same experience as jellygoose

how must i calculate?

MPEG sample file size * 0.98 ?
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02-16-2003, 05:30 PM
Jellygoose Jellygoose is offline
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worked for me buddy
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02-17-2003, 06:30 AM
Kane Kane is offline
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but that sounds not logical, if i reduce the size of the sample , the size of the whole video is also reduced, i think
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02-17-2003, 06:54 AM
Jellygoose Jellygoose is offline
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No, because the factor you divide by is actually reduced... see if you want to determine your sample size you do this : CD Size - Audio Size / ((TotalFrames/MovieTime/24)*0.9

get it ?
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02-17-2003, 07:06 AM
Kane Kane is offline
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i understand, what you wrote, sound not logical, although

you got pm
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