I tried. Certain scenes may isolate dialogue to the extent to which this would be possible, but they are few and far between. If there’s any reverb, it sounds very unnatural. And if there is any music or other sounds in the center channel, same story. It might work for an isolate line or two, but it’s far beyond my skills to do this for the whole film.
Very understandable. I find it very hard to isolate voices from the rest of the audio for any movie.