video sizes on stand alone system question

[ocean 0]

Hi , I just want to know some information about cctv . In particular

if I have one hour of motion recording (60 minutes @7fps and @15fps) with a dome camera with 540 tv lines recording using mpg-2 compression, how much would it be interms of memory MB/minute? (assume only one camera)

 

 

Is a camera with 540 lines equivalent to a 640x480 resolution?

 

 

thanks.