H4 stamping in India 2nd time

I am on H4 visa in US currently my current H4 visa has expired on Aug 2014 but i have got my H4 visa extension to stay until March 2016. Now, I have to travel to India and have to go for H4 stamping

Are the documents required for H4 stamping the same again as the docs required for H4 stamping the first time or

I can fill up the DS160 and take my H4 extension copy for the visa interview?