can't convert PAL aspect ratio correctly

[DaddyBC]

I am trying to convert a show to MPEG that I can't seem to get the aspect ratio correct, It's an AVI, when I load it into gui4ffmpeg it shows:
start: 0.000000, bitrate: 1131 kb/s
Stream #0.0 Id: 0: Video: msmpeg4, 640x272, 25.00 fps
Stream #0.1 Id: 1: Audio: mp3, 44100 Hz, stereo, 159 kb/s

I tried a couple of different options and the picture is either to wide or to tall.
I have tried using a target of DVD, NTSC, 16.9 and DVD, NTSC and 16.9>4.3

Any ideas on how to convert it correctly?

[Bester]

Assuming your video has no overscan and you like to encode anamorphic:

For PAL: Resize to 704 x 432, add black borders to 720 x 576, set the mpeg2 16/9 flag

For NTSC: Resize to 704 x 364, add black borders to 720 x 480, set the mpeg2 16/9 flag

Hope this is correct, got only 4 hours of sleep...

You may also look here: http://www.seemoredigital.net/03_Video_Info.html

[gui4ffmpeg]

Choose in gui4ffmpeg your target (e.g. dvd), set the format to pal, let the aspect 4:3 unchanged and activate the "Correct ratio" box. Encode some seconds and see the result. If it's wrong, switch the aspect to 16:9 and encode again.