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• ffmpeg clean all noise background silences in a poscast

  23 mars 2019, par fireDevelop.com

  I have hundreds of podcast without music, just the voice and the room silence.
  In the silences, I have many clicks, respirations, etc...
  I need to clean all silences with a script, keeping intact the voice.

  In this picture you can see my dirty silences

  And here the result I want in all my audios

  When I use some scripts of sox. I don`t get the result I spect because the voice is affected by the script, the room-silence disappear and some clic still in the silences.

  Then in order to keep intact the voice, I want to do this :

  1. Delete all the silences longer than 3 seconds.

  ---

  2. Split all the audio and silences with in a sequence numbers. ie. :

     • 001-Silence-2.0seconds.wav
     • 002-voice.wav
     • 003-Silence-0.25seconds.wav
     • 004-voice.wav
     • 005-Silence-0.75seconds.wav
     • 006-voice.wav
     • ...
     • ...

  ---

  3. Before, run the script I created manually many files with silences of diferents silences I will use :

     • myManuallySilence-0.25seconds.wav
     • myManuallySilence-0.50seconds.wav
     • myManuallySilence-0.75seconds.wav
     • myManuallySilence-0.1seconds.wav
     • myManuallySilence-1.25seconds.wav
     • ...
     • ...
     • myManuallySilence-2.50seconds.wav
     • myManuallySilence-2.75seconds.wav
     • myManuallySilence-3.0seconds.wav

  ---

  4. the script will check the dirty silences duration and replace by the files myManuallySilence-x.xseconds.wav

  ---

  5. merge all files in one wav file, with the original voice and all the silences cleanned.

  ---

  At the moment I have only this script :

  # get the path of Adobe Audition and add timestamp in the output 
  
  filename
  
  fileName=out
  
  current_time=$(date "+%Y.%m.%d-%H.%M.%S")
  
  newFileName=$fileName.$current_time.wav
  
  #yourPathAPP=/Applications/Adobe\ Audition\ CC\ 2019/Adobe\ Audition\ 
  
  CC\ 2019.app
  
  yourPathAPP=/Volumes/6TB/Applications/ocenaudio.app
  
  # # First denoise audio
  
  
  
  # ## Get noise sample
  
   ffmpeg -i in.wav -vn -ss 00:00:00 -t 00:00:01 noise-sample.wav
  
  
  
  # ## Create noise profile
  
   sox noise-sample.wav -n noiseprof noise.prof
  
  
  
  # ## Clean audio from noise
  
   sox in.wav $newFileName noisered noise.prof 0.50
  
  # # Split audio by noise
  
   sox -V3 $newFileName output.wav silence 1 00:00:02.000 - 80d 1 
  
   00:00:02.000 -80d : newfile : restart
  
  
  
  # ####### (these settings worked for my computer mic - maybe we need to 
  
  finetune them later) #######

  Is getting all the voice in separate files like this :
  output001.wav
  output002.wav
  output003.wav
  output004.wav
  ...
  output00x.wav

  Please, any suggestion will be appreciated.
  Thanks so much in advance !

• Why the result of FFmpeg capture process has no audio to create a webm file ?

  23 mars 2019, par RAM

  The result of my bellow FFmpeg command has no audio (is silent) :

  ffmpeg -f gdigrab -framerate 30 -i desktop -video_size 720x480 -c:v libvpx-vp9 -c:a libopus -b:v 1M -b:a 128K -auto-alt-ref 0 -crf 10 -preset ultrafast output.webm

  But this one has audio :

  ffmpeg -f gdigrab -i desktop -f dshow -i audio="Microphone (4- High Definition Audio Device)" output.mkv

  • How should I capture as webm file by using libopus or libvorbis ?
  • What is the problem in my first command ?

  ---

  My FFmpeg version :

  ffmpeg version N-93439-gb073fb9eea Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 8.2.1 (GCC) 20190212
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg 
  
                   --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab 
  
                   --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  
    libavutil      56. 26.100 / 56. 26.100
  
    libavcodec     58. 47.105 / 58. 47.105
  
    libavformat    58. 26.101 / 58. 26.101
  
    libavdevice    58.  7.100 / 58.  7.100
  
    libavfilter     7. 48.100 /  7. 48.100
  
    libswscale      5.  4.100 /  5.  4.100
  
    libswresample   3.  4.100 /  3.  4.100
  
    libpostproc    55.  4.100 / 55.  4.100

• Converting .aif to mp3 using pydub

  22 mars 2019, par Nick Wetaski

  I want to convert a bunch of music files located on my desktop (however trying to convert just one of them is the first step) from .aif to .mp3 however I am receiving an error code 1 from ffmpeg.

  I have ffmpeg and pydub installed

  Code :

  from os import path
  
  from pydub import AudioSegment
  
  from pydub.utils import which
  
  
  
  AudioSegment.converter = which("ffmpeg")
  
  
  
  aif_audio = AudioSegment.from_file("C:/Users/Nick/Desktop/scratch/landonmusic1.aif", format="aif")
  
  
  
  aif_audio.export("C:/Users/Nick/Desktop/scratch/landonmusic1.mp3", format="mp3")

  I am receiving the following feedback from Python Terminal :

  S C:\Users\Nick\OneDrive\ProgrammingProjects> & C:/Users/Nick/AppData/Local/Programs/Python/Python37-32/python.exe c:/Users/Nick/OneDrive/ProgrammingProjects/Classes/MusicFileConverter.py
  
  Traceback (most recent call last):
  
    File "c:/Users/Nick/OneDrive/ProgrammingProjects/Classes/MusicFileConverter.py", line 10, in <module>
  
      aif_audio = AudioSegment.from_file("C:/Users/Nick/Desktop/scratch/landonmusic1.aif", format="aif")
  
    File "C:\Users\Nick\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pydub\audio_segment.py", line 704, in from_file
  
      p.returncode, p_err))
  
  pydub.exceptions.CouldntDecodeError: Decoding failed. ffmpeg returned error code: 1
  
  </module>

  Output from ffmpeg/avlib :

  b"ffmpeg version N-93431-g6dc1da416e Copyright (c) 2000-2019 the FFmpeg developers\r\n  built with gcc 8.2.1 (GCC) 20190212\r\n  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt\r\n  libavutil      56. 26.100 / 56. 26.100\r\n  libavcodec     58. 47.105 / 58. 47.105\r\n  libavformat    58. 26.101 / 58. 26.101\r\n  libavdevice    58.  7.100 / 58.  7.100\r\n  libavfilter     7. 48.100 /  7. 48.100\r\n  libswscale      5.  4.100 /  5.  4.100\r\n  libswresample   3.  4.100 /  3.  4.100\r\n  libpostproc    55.  4.100 / 55.  4.100\r\nUnknown input format: 'aif'\r\n"