audio denoise filter

[rain]

Summary of the bug:
How to reproduce:

% ffplay -f oss -i /dev/dsp
ffmpeg version git-2012-12-14-5c78a81
built on ubuntu

[rain]

audio denoise

[Carl Eugen Hoyos]

Since at least for me it is not entirely clear if a "denoise filter" is something reasonably defined: Could you either add some explanation what the filter should do or point to a documentation (or an example filter)?

[rain]

For example,ffmpeg filter:“aformat”.
Convert the input audio to one of the specified formats.

But I want one filter which can reduce the audio noise,eliminate the broken sound and echo.

The input audio is captured from the pc's microphone,and the output audio is very clear.

If you want to know all the filters of the ffmpeg,you can use "ffmpeg -filters".

[Ganesh Ajjanagadde]

It should be clear that such a general purpose filter cannot exist: one has to know what kind of noise you are looking for in order to filter it out. Different algorithms will work well against different kinds of noise.

A quick internet search will show a number of approaches taken for this. Do you want something like Audacity's approach set:
​http://wiki.audacityteam.org/wiki/Noise_Reduction#Other_Techniques?

[Elon Musk]

Feel free to reopen, once you provide input audio files with noise.