Copying data from MySQL to Amazon DynamoDB

I have a table in MySQL Containing 500 million records. I want to import this table to Amazon DynamoDB.I understand there are two ways to do it:

1. 
   

   JAVA Api: The problem with this approach is that it is slow, also the connection to database gets dropped sometimes.

   
   


2. 
   

   Amazon Data Import Pipeline : Seems promising, But how do I export the data from MySQL to the format recognized by DynamoDB?

   
   

Please let me the best possible approach between the two.