This is a guide that will show you how to use winavi to convert .avi or other formats files to DVD, then burn to disc, play them on your DVD player. Of course, there are similar steps for convert files to mpeg1/2, mpg, VCD, SVCD, KVCD, miniDVD, except the advanced option.
At the first, you may need to install the needed codec for the special file. I will use v7.6 which I think much stable and for more progresses. So there maybe some differences in different versions.
Then begin:
1. Start up WinAVI: (You can try trial version first here:
http://www.winavi.com/avi-to-dvd.htm)

Click “DVD” button, or you can click "menu" button, then select "format convert" to find "Any to Mpeg/VCD/SVCD format" in the submenu.
2.Select file(s):WinAVI can convert many files toghter once time.So you can choose one or more files for conversion.You can use "Ctrl" or "Shift" for choose more files toghter.
3.After select files,you can get this page.

1)You can see the input files in the top of right.If you find the files are not listed in order, you can rearrange them as followings:
Firstly, please select a file, and then click the UP/Down Arrow on the left side of the list to move it, till get it in correct order. Just do the same with other files.
2)For source file:This is a differ from old version.If you select more than one file you can see this box.It has three cases:
A."Creat new DVD" : For this,you can get how many DVD folders as you select files for conversion.That means,if you select three files convert to DVD,you will get three DVD folders for each original file.Just like "DVD_01_1", "DVD_02_1", and "DVD_03_1".
B."Merge into one DVD": For this,you will get only one DVD folder which contain all input files,but in different titles.That means,in DVD folder-->VIDEO_TS,you can see: "Vts_01_1.VOB", "Vts_02_1.VOB" and "Vts_03_1.VOB" files.
C."Merge into one title": Also in one DVD folder and in the same title.You can see:
"Vts_01_1.VOB", "Vts_01_2.VOB"....
3)Reelect:If you want to change input files,you can click it to select files again.
4)Output directory:You can type the directory by yourself in the blank or use "Browse".
Now,you can click "OK" to start conversion.But also can go to "Advanced" option.