计算mp3平均音量 [英] calculate mp3 average volume

问题描述

我需要知道mp3文件的平均音量，以便当我将其转换为mp3(以不同的比特率)时，我也可以缩放该音量，以对其进行归一化...

I need to know the average volume of an mp3 file so that when I convert it to mp3 (at a different bitrate) I can scale the volume too, to normalize it...

因此，我需要一个命令行工具/ruby​​库，该库提供了以dB为单位的平均音量.

Therefore I need a command line tool / ruby library that gives me the average volume in dB.

推荐答案

您可以使用sox(开放源代码命令行音频工具

You can use sox (an open source command line audio tool http://sox.sourceforge.net/sox.html) to normalize and transcode your files at the same time.

编辑

好像没有比特率选项.无论如何，如果LAME进行归一化，则sox可能会被杀掉.

Looks like it doesn't have options for bit-rate. Anyway, sox is probably overkill if LAME does normalization.

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