Not able to convert movie

I’m trying to use Convertx to dvd 3 to convert a movie. After i select the movie, and click on convert. The determine movie duration screen pops up, and it says (The duration of this movie is required but can’t be determined) I have selected duration of the movie and also tried the automatic button. it show the duration of the movie as 1 minute, even though the movie is 800+ mb long. It shows (Titleset #1 - 1min. File) It burn 1 minute.

What kind of file is this & have you checked it on your computer?