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Re: Predicting compressed file sizes
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Re: Predicting compressed file sizes


  • Subject: Re: Predicting compressed file sizes
  • From: Ian Kemmish <email@hidden>
  • Date: Wed, 27 Feb 2008 21:07:27 +0000


On 27 Feb 2008, at 8:04 pm, Tommy Braas <email@hidden> wrote:


Hi,

I need this to calculate/estimate remaining recording time based on
available temp drive space.

I was just wondering if anyone has a good forecasting algorithm for
estimating the size of a compressed audio file.

The uncompressed PCM is trivial, as should the CBR case be. The
problem is mainly for VBR type files.

Any pointers and help will be greatly appreciated!



I suspect that most users would find an "estimated time remaining" much less useful than a "guaranteed minimum time remaining", and you presumably will find the latter much easier to calculate.


If the user is recording source material which compresses better than that, he'll noticed the clock is ticking down slowly, and be happy.

On the other hand, if you give him an estimate, and he goes away to make a cup of coffee, and comes back to find that your estimate was too high, he probably won't be happy.

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Ian Kemmish 18 Durham Close, Biggleswade, Beds SG18 8HZ
email@hidden Tel: +44 1767 601361 Mob: +44 7952 854387
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