preset:
    name:   Normalize audio level
    group:  ffmpeg/audio
    plugin: ffmpeg
    props:
        filter: "dynaudnorm=m=100:s=12"
        #filter: "dynaudnorm=m={maxgain}:s={compress}"
        extra: "-c:v copy"
        type: complex
    params:
        compress: { label:"Compression factor", type:float, min:0.0, max:30.0, default:0.0 }
        maxgain: { label:"Max gain factor", type:float, min:0.0, max:100.0, default:10.0 }