What am I missing?Īlso, I read about weiner filters that could be used for speech enhancements and found this but am not sure how to use it. My reasoning was that since speech comes under 300-3000 hz range I can filter out all other frequencies to suppress any background noise. Till now I have tried following filters: ffmpeg-20140324-git-63dbba6-win64-staticin>ffmpeg -i i nput.wav -filter_complex 'highpass=f=400,lowpass=f=1800' out2.wavįfmpeg -i i nput.wav -af 'equalizer=f=1000:width_type=h:width=900:g=-10' output.wavįfmpeg -i i nput.wav -af 'bandreject=f=1200:width_type=h:width=900:g=-10' output.wavīut the results are very disappointing. I am using ffmpeg to do all of this stuff, but am stuck at the noise reduction phase.

I want to reduce the background noise of the audio so that the speech that I relay to my speech recognition engine is clear. These videos come from mobile/other handmade devices and hence contain a lot of noise.

I extract audio clips from a video file for speech recognition.

Audacity ffmpeg gentoo