ffmpeg command problem in python to remove silences at the beggining and end. error: returned non-zero exit status 4294967274

Question

I have a problem regarding ffmpeg use in jupyter notebooks. I'm trying to use this funcion for an audio, but I get the below error, I have tried changing the file to wav and different specifications of the command code. But nothing works.

def remove_silence(input_file):
    """
    Remove silence from the start and end of an audio file and overwrite the original file.

    Args:
    input_file (str): Path to the audio file.

    Returns:
    str: Path to the processed audio file (same as input path).
    """
    # Construir el comando FFmpeg en una lista
    ffmpeg_cmd = [
        "ffmpeg",
        "-y",  # Sobrescribir el archivo de salida sin preguntar
        "-i", input_file,  # Archivo de entrada
        "-af", "silenceremove=start_periods=1:stop_periods=-1:start_threshold=-50dB:stop_threshold=-50dB:start_silence=0.2:stop_silence=0.2",  # Filtros de audio
        input_file  # Archivo de salida (sobrescribiendo el archivo original)
    ]
    
    try:
        # Ejecutar el comando
        subprocess.run(ffmpeg_cmd, check=True)
        print("Silence successfully removed!")
        return input_file
    except subprocess.CalledProcessError as e:
        print(f"Error during silence removal: {e}")
        return None

error message:

Error during silence removal: Command '['ffmpeg', '-y', '-i', 'BNE.wav', '-af', 'silenceremove=start_periods=1:stop_periods=-1:start_threshold=-50dB:stop_threshold=-50dB:start_silence=0.2:stop_silence=0.2', 'BNE.wav']' returned non-zero exit status 4294967274.

Rob · Accepted Answer · 2024-09-02 06:50:07Z

1

The issue is that ffmpeg can't edit file in-place. Change output file to something else and the command will work.

    output_file = f"out_{input_file}"
    ffmpeg_cmd = [
        "ffmpeg",
        "-y",  # Sobrescribir el archivo de salida sin preguntar
        "-i", 
        input_file,  # Archivo de entrada
        "-af",
        "silenceremove=start_periods=1:stop_periods=-1:start_threshold=-50dB:stop_threshold=-50dB:start_silence=0.2:stop_silence=0.2",  # Filtros de audio
        output_file  # Archivo de salida (sobrescribiendo el archivo original)
    ]

edited Sep 2, 2024 at 6:50

Rob

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answered Sep 1, 2024 at 18:48

Johnny Cheesecutter

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1 Comment

Teko JR Over a year ago

Thanks! To overwrite the file I used: os.replace(temp_output_file, audio_file_path) with a temporary file

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