burnt time comes up short of original movie

My original download time was 1:47:45,after dvd flick was finished encoding and burning the disk time came out short at 1:39:40,i have tried three different downloads and two different movies and have the same result,what can i do to correct the problem.

 

Is there any problem with the video playback?
What is the FPS of the AVI, and what are you converting to(PAL/NTSC)?

 

I am converting to ntsc i am not sure what the fps is and where to find it

 

Frames Per Second. Usually PAL movies are a bit shorter, so in your case if you were to convert from PAL to NTSC, it would maybe come out a bit longer, not the opposite.

If you play the video with VLC for example, go to Tools->Codec Information-.Codec Details and it will show the frame rate.

 

I'm guessing source is 24 fps and output is 30fps .. that would do it if it's complete.

 

I found the source to be 25 fps but i cannot find the output fps,but my burn times are 8 minutes short of the original download.