windows 从命令行创建无声 mp3
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Create a silent mp3 from the command line
提问by Stephen
I am trying to create a silent / empty mp3 file of (x) seconds using the command line. Quite a simple task I thought!
我正在尝试使用命令行创建 (x) 秒的无声/空 mp3 文件。我认为这是一个相当简单的任务！
It seems LAMEis able to do something like this, but I am unable to find anything that leads to achieving this.
似乎LAME能够做这样的事情，但我找不到任何可以实现这一目标的东西。
Has anyone been able to do something like this?
有没有人能够做这样的事情？
采纳答案by miku
Disclaimer: This is a unix-oriented approach (although sox is cross-platform and should get it done on windows only as well).
免责声明：这是一种面向 Unix 的方法（尽管 sox 是跨平台的，并且也只能在 Windows 上完成）。
You'll need sox- "the [cross-platform] Swiss Army knife of sound processing programs".
This wrapper perl script, helps you generate any seconds of silence: http://www.boutell.com/scripts/silence.html
$ perl silence.pl 3 silence.wav
您将需要sox- “声音处理程序的 [跨平台] 瑞士军刀”。
这个包装 perl 脚本可帮助您生成任何几秒钟的静音：http: //www.boutell.com/scripts/silence.html
$ perl silence.pl 3 silence.wav
silence.plis quite short, so I include it here, since it's public domains:
silence.pl很短，所以我把它包括在这里，因为它是公共领域：
#!/usr/bin/perl
$seconds = $ARGV[0];
$file = $ARGV[1];
if ((!$seconds) || ($file eq "")) {
die "Usage: silence seconds newfilename.wav\n";
}
open(OUT, ">/tmp/$$.dat");
print OUT "; SampleRate 8000\n";
$samples = $seconds * 8000;
for ($i = 0; ($i < $samples); $i++) {
print OUT $i / 8000, "\t0\n";
}
close(OUT);
# Note: I threw away some arguments, which appear in the original
# script, and which did not worked (on OS X at least)
system("sox /tmp/$$.dat -c 2 -r 44100 -e signed-integer $file");
unlink("/tmp/$$.dat");
Then just lameit:
那么就lame这样吧：
$ lame silence.wav silence.mp3
回答by nico_lab
You can use this command.
您可以使用此命令。
ffmpeg -f lavfi -i anullsrc=r=44100:cl=mono -t <seconds> -q:a 9 -acodec libmp3lame out.mp3
Change <seconds>to a number indicating the number of seconds of silence you require (for example, 60will create a minute).
更改<seconds>为一个数字，指示您需要的静音秒数（例如，60将创建一分钟）。
回答by user495100
Avoid the nuisance of creating a wav header, and let lame handle a raw file:
避免创建 wav 头的麻烦，让 lame 处理原始文件：
dd if=/dev/zero bs=1M count=? | lame -r - - > silence.mp3
setting ?=2 gives a 11 second file (@ standard 44KhZ, etc... parameters).
设置 ?=2 给出了一个 11 秒的文件（@标准 44KhZ 等...参数）。
Note: this was tested on Unix; I understand there are dd and lame for windows, too.
注意：这是在 Unix 上测试的；我知道 Windows 也有 dd 和 lame。
回答by Anees Sadeek
sox -n -r 44100 -c 2 silence.wav trim 0.0 3.0- this will create a 3sec stereo silence file.
Here nfor null file handler, ris the sample rate and cis the number of channels.
sox -n -r 44100 -c 2 silence.wav trim 0.0 3.0- 这将创建一个 3 秒的立体声静音文件。这里n表示空文件处理程序，r是采样率，c是通道数。
Then just lame it:
然后只是跛脚它：
$ lame silence.wav silence.mp3
$ lame silence.wav silence.mp3
