Simple DivX stretches NTSC film to ~1.25 of original length?

[flickerx]

Hows it going

I have an NTSC film that I'm backing up to DivX. I'm using Simple DivX 1.38 and encoding with the DivX 5.0.1 codec. The original film is 1 hour and 40 minutes in length.

I followed this guide here:
http://www.simpledivx.org/Guides/Afonic_SimpleDivX_Guide/Afonic%20SimpleDivX%20Guide.html
but the difference is the NTSC frame rate in the original film is 23.97 and not 25 fps PAL.

So I followed the guide (and read several others as well, all saying the same thing) and in the Video Tab of Simple DivX, I left the framerate as the original (i.e. 23.97). But now the output of the film is 2 hours and 5 minutes (but the audio is still only 1:40 - so it slides out of sync very early on!!)

So I worked out the ratio of the other NTSC frame rate, 29.97 fps, to the original 23.97 is ~1.25. If you multiply 100 minutes by 1.25 then you get 125 minutes, i.e. the length of the outputted DivX film.

So it seems as if Simple DivX is taking the input of 23.97 and outputting it as 29.97 fps.

Can anyone help me with this? Is it a problem with the Codec perhaps? Does DivX know how to output NTSC alright?

Forgive me if the answer is simple, I'm a bit of a newbie to all this. Thanks.

(I really hate NTSC framerates!!)

[maetel99]

Your problem is most likely that Simple DivX is not properly decoding the DVD MPEG video. It is not correctly handling the 2-3 pulldown flags to output 23.97 fps video. An MPEG decoder has to recognize the flags in the MPEG stream and act accordingly in order to get out proper progressive 23.97 fps video.

[flickerx]

Your problem is most likely that Simple DivX is not properly decoding the DVD MPEG video. It is not correctly handling the 2-3 pulldown flags to output 23.97 fps video. An MPEG decoder has to recognize the flags in the MPEG stream and act accordingly in order to get out proper progressive 23.97 fps video.

Any idea how I can resolve this problem? Is there some way of fixing the MPEG2AVI tool within SimpleDivX so it can recognise the flags?