i have a digital video recorder for my security cameras. it has a RCA output.how can i view it in my laptop?

i have a digital video recorder for my security cameras. it has a RCA output.how can i view it in my laptop? i have a digital video recorder 500gig HDD for my security cameras. the recorder has a RCA output. how can i view it in my laptop, if my laptop connection only has HDMI [...]