Hydrogenaudio Forums > Calculating frame sizes

JensRex

Feb 16 2002, 14:40

I'm trying to calculate the frame size of an MP3 frame using this formula that I found here.

The formula is:

CODE

FrameLengthInBytes = 144 * BitRate / SampleRate + Padding

When inserting values I get:

CODE

144 * 128000 / 44100 + 0 = 417,95918367346938775510204081633

I was expecting a whole number. The result is very close to 418, but not quite there. Is the formula wrong? Should I Int() the number, or Round() it?

madah

Feb 16 2002, 14:51

You should always Trunc() or Int() it.

From the link you mentioned:

QUOTE

Example:
Layer III, BitRate=128000, SampleRate=441000, Padding=0
==> FrameSize=417 bytes

So if Padding=1 the frame would be 418 bytes.

This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.