app.py

import gradio as gr
import subprocess
import os

def recognize_music(pdf_file):

    audiveris = "/opt/audiveris/bin/Audiveris"
    output_dir = "/tmp/output"
    pdf_file_path = pdf_file.name
    pdf_file_name = os.path.basename(pdf_file.name)
    musicXml_file_name = os.path.splitext(pdf_file_name)[0]+".mxl"
    output_file = output_dir + "/" + musicXml_file_name

    cmd = [
        audiveris, "-batch", "-export", "-output", output_dir, pdf_file_path
    ]

    result = subprocess.run(cmd, capture_output=True, text=True)

    print (f"Done. Music score file saved to {output_file}\n\n{result.stdout}\n{result.stderr}")

    return output_file

audiveris = gr.Interface(
    fn=recognize_music,
    inputs=gr.File(file_types=[".pdf"], label="Upload PDF music score"),
    outputs=gr.File(label="Download MusicXML file"),
    description="Upload a PDF music socre and create a MusicXML file from it.",
)
audiveris.launch()