Hi, it has taken me about 4 hours and three DVD discs but i think i have solved this as i was having problems when burning with windows DVD maker the picture was looking thin and stretched.
first thing i dont was to download WinAvi and i used this to convert the film file to DVD format (which was a folder with folders inside, one named Video_TS and one named Audio_TS, which are what real DVD's have on them.).
i then used a program called imgburn to burn these two folders to my DVD disc i set it to auto adjustment for the screen size and i just selected the format (PAL) and dvd quality (highest).
the whole process took around half hour which was much faster than windows dvd maker, and when i played it the picture was fine, the audio was out of sync the first time though and this was to do with the converting, so i just upped the quality to highest and this seems to have solved it.
can i just add im not trying to get you to use these programs or anything, you might have to buy a subscription or something i dunno, i downloaded it from a different kind of site.
there might be versions of software that do the same thing for free, but these are the two i used and they worked great.
hope this helps, the stretched picture has been bothering me for literally months, every single DVD i burned.