hdrip and dvdscr is classified according to the movie resources
x264 is a standard for encoding video
dvdscr means dvd screening. sometime it has property warnings or some parts are in black. they are not the first choice.
hdrip comes from hdtv. the resolution is high. but because it is broardcasted to the public, sometimes some parts of the original movie is removed due to the violence or sex.
x264 is a good standard. but probably need more resources of the computer