https://blog.faceutil.com/2017/03/25/virtualdub-%eb%b2%84%ec%b8%84%ec%96%bc%eb%8d%a5-%eb%8f%99%ec%98%81%ec%83%81-%ec%9e%90%eb%a5%b4%ea%b8%b0-%e3%8e%a1/