我如何在Linux中创建一个MP3的波形图像？ [英] How can I create a waveform image of an MP3 in Linux?

问题描述

给定一个MP3，我想从文件中提取波形成一个图片（.png）

Given an MP3 I would like to extract the waveform from the file into an image (.png)

有一个包，可以做什么，我需要？

Is there a package that can do what I need ?

推荐答案

使用 SOX 和 gnuplot的您可以创建基本波形图像：

Using sox and gnuplot you can create basic waveform images:

sox audio.mp3 audio.dat #create plaintext file of amplitude values
tail -n+3 audio.dat > audio_only.dat #remove comments

# write script file for gnuplot
echo set term png size 320,180 > audio.gpi #set output format
echo set output \"audio.png\" >> audio.gpi #set output file
echo plot \"audio_only.dat\" with lines >> audio.gpi #plot data

gnuplot audio.gpi #run script

要创建简单的东西/ prettier，使用下面的GNU绘图文件作为模板（保存为 audio.gpi ）

To create something simpler/prettier, use the following GNU Plot file as a template (save it as audio.gpi):

#set output format and size
set term png size 320,180

#set output file
set output "audio.png"

# set y range
set yr [-1:1]

# we want just the data
unset key
unset tics
unset border
set lmargin 0             
set rmargin 0
set tmargin 0
set bmargin 0

# draw rectangle to change background color
set obj 1 rectangle behind from screen 0,0 to screen 1,1
set obj 1 fillstyle solid 1.0 fillcolor rgbcolor "#222222"

# draw data with foreground color
plot "audio_only.dat" with lines lt rgb 'white'

和只需运行：

sox audio.mp3 audio.dat #create plaintext file of amplitude values
tail -n+3 audio.dat > audio_only.dat #remove comments

gnuplot audio.gpi #run script

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