Ok I'm trying to figure this out myself a little without having to constantly nag you to show me the way.so I did a test using a different converter program on my laptop it's called any video converter pretty decent although on my laptop it takes quite awhile converting depending on file size. So tried converting an Anbu Aone file "Naruto episode 106".avi format and 175megabytes in size tried converting it to mp4 format you may be able to see a few of the details on the right hand side of the image:
picture quality.jpg
I have changed the variable bitrate to 4000 and changed the frame size to original.again after a long wait of conversion process I get the video in mp4 and for once the quality seems alright It's nice and big and easy to read subtitles.here's the catch the new file size is f**k'n 635.64 megabytes.