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Audio

Audio processing module for video files.

This module provides functionality for converting video files to audio format, specifically focusing on MP4 to WAV conversion for further processing.

Functions:

Name Description
convert_mp4_to_wav

Converts MP4 video files to WAV audio format

convert_mp4_to_wav(video_path, video_id)

Convert MP4 video file to WAV audio format.

Parameters:

Name Type Description Default
video_path str

Directory path containing the video file

 required
video_id str

Identifier of the video file

 required

Returns:

Type Description
Path

Path object pointing to the output WAV file

Raises:

Type Description
Exception

If FFMPEG subprocess fails during conversion
Source code in apps/annotator/code/media/audio.py 
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def convert_mp4_to_wav(video_path: str, video_id: str) -> Path:
    """
    Convert MP4 video file to WAV audio format.

    Parameters
    ----------
    video_path : str
        Directory path containing the video file
    video_id : str
        Identifier of the video file

    Returns
    -------
    Path
        Path object pointing to the output WAV file

    Raises
    ------
    Exception
        If FFMPEG subprocess fails during conversion
    """
    output_file_path = Path(video_path).joinpath(video_id+'.wav')
    if os.path.isfile(output_file_path): 
        return output_file_path

    input_file_path = Path(video_path).joinpath(video_id+'.mp4').__str__()
    try:
        # Run ffmpeg command to convert MP4 to WAV
        subprocess.run(['ffmpeg', '-i', input_file_path, output_file_path.__str__()], 
                       check=True, 
                       stdout=subprocess.PIPE, 
                       stderr=subprocess.PIPE)
    except subprocess.CalledProcessError as e:
        print(e)
        raise Exception("ERROR SUBPROCESS FFMPEG")
    return output_file_path