There are 3 main methods to retrieving source material:
- Downloads(not recommended)
Obviously use the hard copy sources you have, Blu-ray and DVD. It’s a good time to have friends, if you’re on a budget, because box sets and movies can be expensive.
Now, There are many people out there that use downloaded material as source. Even if you ignore the legality of what you’re doing, you can’t ignore the fact that most downloaded videos are already compressed in a way that you lose a good amount of quality. Due to the problems you could run into, I am not going to go into methods of getting source outside of using the purchased ones.