I've worked for a few fansubbers as raw provider, you get low quality raws from sites whitch is really secret... you gotta have a kanji transelator program because the lq raws are in kanji and the whole site, so if you don't have a translation program you can never get a file.. after you downloaded that really bad lq you send it to the encoder that encodes it to HQ raw then they finally start working on the epsiode... that's about it, it's too troublesome to explain every step..