Importing VOB from DVD results in squeezed image
Sounds like thoses apps aren't respecting the Pixel Aspect Ratio (PAR) flag.  Widescreen DVD movies aren't usually made of more pixels, they have a setting in the metadata telling the player to stretch the pixels from squares into rectangles to make the picture look right.

VLC is reading the PAR flag and playing the pixels back in their correct aspect ratio.

A possible solution that has worked for me in some situations is to use HandBrake to convert from stretched pixels with a PAR flag to more pixels that are square.  You can do this in Handbrake by previewing the movie in Anamorphic PAR mode, noting the image dimensions listed, then turning off Anamorphic and the PAR, and typing the dimensions in by hand.  The resulting render will have square pixels (PAR 1.0) but the image will be properly stretched.

Hope that helps.