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• librosa can't load wav file in aws lambda docker

  30 novembre 2022, par Luka Savic

  I have an AWS Lambda function created using Docker.
I have librosa installed, ffmpeg installed using the solution from this question : install ffmpeg on amazon ecr linux python

  


  I checked in a Lambda function with os.system("ffmpeg -version") and I managed to get valid output, stating different versions and parts of ffmpeg.

  


  Problem is that when I do librosa.load(wav_file) it gives the following error :

  


  /your/path/.venv/lib/python3.9/site-packages/librosa/util/decorators.py:88: UserWarning: PySoundFile failed. Trying audioread instead.
  return f(*args, **kwargs) 


  


  From what I've read, librosa should natively support .wav files, even without ffmpeg, and even though I have ffmpeg installed, it doesn't work.

  


  One more information, .wav file was downloaded, player, and loaded with librosa on my local PC without any problems. I tried also on different wav and mp3 files, and the problems were still there.

  


• libavcodec : MIPS : MMI : Fix type mismatches

  18 juillet 2020, par Jiaxun Yang

  libavcodec : MIPS : MMI : Fix type mismatches
  GCC complains about them.
  Signed-off-by : Jiaxun Yang <jiaxun.yang@flygoat.com>
  
  Reviewed-by : Shiyou Yin <yinshiyou-hf@loongson.cn>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/mips/h264dsp_mips.h
  • [DH] libavcodec/mips/h264dsp_mmi.c
  • [DH] libavcodec/mips/xvid_idct_mmi.c
  • [DH] libavcodec/mips/xvididct_mips.h

• Getting wav buffer from stdout

  3 août 2024, par KxAy

  I am trying to get a downsampled audio so that I can use it for an hotword detection API. In the solution I am currently using, the audio is correctly converted and the API is able to recognize the content of the audio file. However, I am constantly forced to write temporary output files. I have tried several times to use "pipe:1" in ffmpeg to output the converted audio as a stream to stdout, but it has always given me errors.

  


  function downsampleAudio(pcmBuffer) {
    return new Promise((resolve, reject) => {
        const inputStream = new PassThrough();
        inputStream.end(pcmBuffer);

        let filePath = path.join(__dirname, "output.wav")

        const ffmpeg = spawn("ffmpeg", [
            "-f", "s16le",   
            "-ar", "48000",  
            "-ac", "1",     
            "-i", "pipe:0",  
            "-ar", "16000",  
            "-ac", "1",      
            "-c:a", "pcm_s16le", 
            filePath 
        ]);
                    
        ffmpeg.stdin.on('error', (error) => {
            reject(new Error('Errore nello stream stdin di ffmpeg: ' + error.message));
        });

        ffmpeg.on('close', (code) => {
            if (code !== 0) {
                reject(new Error(`Il processo ffmpeg è terminato con codice ${code}`));
            } else {
                console.log('Conversione completata con successo');
                const waveBuffer = fs.readFileSync(filePath);
                fs.unlinkSync(filePath);
                resolve(waveBuffer)
            }
        });

        inputStream.pipe(ffmpeg.stdin);
    });
}


  


  Can anyone help me figure out how to correctly use ffmpeg to output the audio as a stream to stdout without errors ? Thanks in advance !