burning video to dvd

ive searched this forum and havent found what im looking for. on windows i was using nero vision to turn video files into dvd. (mpeg, avi, wmv, etc) i tried idvd and i movie, and those dont seem to work. i dont really want to have to convert the files before hand. does anyone know of a program that will allow me to create chapters, add a dvd menu and burn to dvd?
thanks

Try Toast from Roxio.

ffmpegx and toast... or dvdstudiopro...

http://homepage.mac.com/major4/dvd_sub.html#opening

ok, toast seems to work, but it wont let me create chapters on mpegs. dvd studio pro wont even accept the mpegs. im now trying ffmpegx but when i try to dl the mpeg2 encoder it sends me to this weird page with a bunch of text on it.
http://mjpeg.sourceforge.net/MacOS/mpeg2enc

all my videos seem to be mpegs that dont work. do i really need to change the file type before any of these progs will read them?

just drag the hyperlink you posted above into your download manager.