Few attachment types at one table

I have one table. And i wanna to save content of 3 types (video, picture, song) at this table. And have only one field for uplo开发者_StackOverflow社区ading all these types. It will be enough for me to have 2 columns : Content_type, Url at the table : Files.

I have heard about 3 gems: attachment_fu, Parceclip, carrierwave. Which of them is better for this target?

Big Thanks!

Regards, Beginning Rails Programmer.