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Sur d’autres sites (8680)

  • how to use ffmpegs's afir in ffmpeg-python

    7 décembre 2023, par Nire

    My goal is to slow down a file and add reverberation using python

    


    here's my code :

    


    import ffmpeg

audio = ffmpeg.input(r'test_files\Gorillaz - Rhinestone Eyes.mp3').audio
audio = audio.filter('rubberband', tempo=0.8, pitch=0.8, pitchq='quality')
# audio = audio.filter('afir', )
output = ffmpeg.output(audio, r'final\test.mp3', format='mp3', audio_bitrate=320_000)
ffmpeg.run(output)


    


    the problem is that I don't know how to properly use afir filter in ffmpeg-python syntax, I tried doing it by hand in command prompt and succeed, but in python it gives me errors

    


    I tried to find information about my problem on the internet, but failed. And also I tried asking chatgpt about all this, but it didn't help either.

    


  • ffmeg react native compatibility with ios

    7 septembre 2023, par Sambhav Jain

    I am using ffmpeg react native kit to modulate recorded voice pitch tempo etc. I am developing app for Ios using react native.
When I call I get invariant violation native module cannot be null error.

    


    I tried different version of ffmpeg to check with compatibility but no success. below is the code for ffmpegexecute

    


        FFmpegKit.execute('-i /data/home/ubuntu/Desktop/secretfriendblackhat2022-295591-react-native/src/packages/blocks/AudioEqualiser/assets/sample.mp3 -c:v mpeg4 file2.mp4').then(async (session) => {
      const returnCode = await session.getReturnCode();
    
      if (ReturnCode.isSuccess(returnCode)) {
    
        // SUCCESS
    
      } else if (ReturnCode.isCancel(returnCode)) {
    
        // CANCEL
    
      } else {
    
        // ERROR
    
      }
    });


    


  • ffmpeg minterpolate and rubberband - how to stretch audio to fit ?

    5 juin 2023, par bossturbo

    What is the best way to control the length of the audio and pitch shift using rubberband ?

    


    I tried setting 'asetpts=PTS*16' to match the video PTS, but it appears to be ignored. The only thing that seems to determine the length of the audio is rubberband pitch. Even 'tempo=0.0625' does not appear to do anything.

    


    I would like to be able to set the audio length to match the slower video section and set the pitch to whatever I want, like minimum 0.15 and have it stretch the audio length as needed.

    


    ffmpeg -ss 123.978571 -i "original-120fps.MP4" -filter_complex "
[0:v]trim=0:0.375,setpts=PTS-STARTPTS,minterpolate='fps=480',setpts=PTS*16[slowv]; 
[0:a]atrim=0:0.375,asetpts=PTS-STARTPTS,rubberband=pitch=0.08:tempo=0.0625[slowa];"
 -y -r 60 -map [slowv] -map [slowa] -preset veryfast "output.mp4"


    


    Finally, is there a good guide to using lib-rubberband ? FFmpeg docs for rubberband doesn't explain anything.

    


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