How to automatically add double quotes for input

[jw-star]

async def imgCover(input, output):
    # ffmpeg -i "https://img.91p51.com/thumb/671451.jpg"   '1849226733/1849226733.jpg'
    print('截图入参:', input, output)
    ff = ffmpy3.FFmpeg(
        inputs={r'"'+input+'"': None},
        outputs={output: ['-y', '-loglevel', 'quiet']}
    )
    print(ff.cmd)
    await ff.run_async()
    await ff.wait()

this is output

ffmpeg -i \"https://ei.phncdn.com/videos/202107/16/391326791/original/(m=eaAaGwObaaaa)(mh=fGWM7xCw0zqe0BE2)7.jpg\" -y -loglevel quiet aa.jpg