清除命令行的语音记录？
清除命令行的语音记录？
提问于 2014-07-02 16:18:50
我以前使用过去噪胆量录音，但是它的命令行使用非常有限。我有100个简短的讲座录像，我将在接下来的几个月里观看，并希望有一个简单的方法，一次或根据需要清洗他们，然后再看。
我是否可以使用命令行工具或流行的语言库来完成此操作？
回答 2
Unix & Linux用户
回答已采纳
发布于 2014-07-02 16:48:08
看看sox
引用man sox：
SoX - Sound eXchange, the Swiss Army knife of audio manipulation...
SoX is a command-line audio processing tool, particularly suited to
making quick, simple edits and to batch processing. If you need an
interactive, graphical audio editor, use audacity(1).因此，它应该是一个很好的适合作为一个伙伴命令行替代audaciy！
关于清理记录的实际任务，请看一下过滤器noisered，它等于降噪滤波器稳健性：
man sox | less -p 'noisered \['
[...]
noisered [profile-file [amount]]
Reduce noise in the audio signal by profiling and filtering.
This effect is moderately effective at removing consistent
background noise such as hiss or hum. To use it, first run
SoX with the noiseprof effect on a section of audio that
ideally would contain silence but in fact contains noise -
such sections are typically found at the beginning or the
end of a recording. noiseprof will write out a noise pro‐
file to profile-file, or to stdout if no profile-file or if
`-' is given. E.g.
sox speech.wav -n trim 0 1.5 noiseprof speech.noise-profil
To actually remove the noise, run SoX again, this time with
the noisered effect; noisered will reduce noise according to
a noise profile (which was generated by noiseprof), from
profile-file, or from stdin if no profile-file or if `-' is
given. E.g.
sox speech.wav cleaned.wav noisered speech.noise-profile 0
How much noise should be removed is specified by amount-a
number between 0 and 1 with a default of 0.5. Higher num‐
bers will remove more noise but present a greater likelihood
of removing wanted components of the audio signal. Before
replacing an original recording with a noise-reduced ver‐
sion, experiment with different amount values to find the
optimal one for your audio; use headphones to check that you
are happy with the results, paying particular attention to
quieter sections of the audio.
On most systems, the two stages - profiling and reduction -
can be combined using a pipe, e.g.
sox noisy.wav -n trim 0 1 noiseprof | play noisy.wav noise
[...]Unix & Linux用户
发布于 2018-03-01 00:17:03
被接受的答案并没有给出一个实际的例子(见第一个注释)，所以我在这里尝试给出一个例子。在使用apt的Ubuntu上，您应该安装sox和音频格式支持
sox
首先安装sox并支持格式(包括mp3)：
sudo apt install sox libsox-fmt-*然后，在对文件/文件运行命令之前，首先需要构建一个配置文件，制作一个噪声样本，这是最重要的部分，您必须选择噪音发生的最佳时间，确保在此示例中没有声音(或您试图保留的音乐/信号)：
ffmpeg -i source.mp3 -ss 00:00:18 -t 00:00:20 noisesample.wav现在，利用该源创建一个概要文件：
sox noisesample.wav -n noiseprof noise_profile_file最后，在文件上运行降噪：
sox source.mp3 output.mp3 noisered noise_profile_file 0.31其中noise_profile_file是概要文件，0.30是值。数值最好在0.20到0.30之间，超过0.3是很有侵略性的，低于0.20是一种软的，并且对非常嘈杂的声音很有效。
试着玩这个，如果你找到其他设置技巧，请与调查结果和调优设置评论。
如何批次处理它们
如果噪声相似，则可以对所有mp3文件使用相同的配置文件。
ls -r -1 *.mp3 | xargs -L1 -I{} sox {} {}_noise_reduced.mp3 noisered noise_profile_file 0.31或者如果有文件夹结构：
tree -fai . | grep -P ".mp3$" | xargs -L1 -I{} sox {} {}_noise_reduced.mp3 noisered noise_profile_file 0.31页面原文内容由Unix & Linux提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://unix.stackexchange.com/questions/140398
复制相关文章
相似问题
腾讯云开发者
