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Topic: Calculating bitrate & space requirements (Read 2254 times) previous topic - next topic
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Calculating bitrate & space requirements

Please help me verify that I'm doing this math correctly.  I'm trying to figure out how many minutes of MP3 at 56 kbps will fit into 32 MB.  What is the correct formula for this?

I'm getting ~78 minutes.  Though knowing that I'm using the correct formula also would be helpful for future use.

Thanks!
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Calculating bitrate & space requirements

Reply #1 –
Quote
Please help me verify that I'm doing this math correctly.  I'm trying to figure out how many minutes of MP3 at 56 kbps will fit into 32 MB.  What is the correct formula for this?

I'm getting ~78 minutes.  Though knowing that I'm using the correct formula also would be helpful for future use.



assuming that the mp3-frames are exactly 56000 Bits/s
and the free space is exactly 32mb which is 32*2^20*8 Bits
you get  (268435456 / 56000 / 60 ~ 79min)

Calculating bitrate & space requirements

Reply #2 –
56kbps stream consumes 0.42MB per minute. Formula is following.

56/8*60/1000=0.42MB/min
32MB/0.42=76.1904...min
 

Calculating bitrate & space requirements

Reply #4 –
kids always need calculators