Laxrefworm

Finally I find this related thread about MNG to MP4 conversion. Yesterday, i find this article about video conversion and it recommend me to download their video converter to convert MNG. In the article, as you can see (http://www.videoconverterfactory.com/tips/hd-crack.html) they claim that the video size can be dramatically compressed after conversion. However, after i changed MPNG to MP4 format, the size got much bigger, around 50 percent larger than the original one while the quality stays the same. How strange it is. Do you guys have any ideas what may happen during the conversion?