fn main() {
    let ausgabe = std::process::Command::new("ffprobe")
        .arg("-i")
        .arg("Film.mp4")
        .output()
        .expect("process failed to execute");
    println!("completed with {}", ausgabe.status);
    let s = String::from_utf8_lossy(&ausgabe.stderr);
    for line in s.lines() {
        if line.starts_with("    Stream") {
            println!("{}", &line);
        }
    }
}