Altering Title Post through save_post Action

Hello,

I have a custom post type which is supposed to render a dynamic title when it processes as well as save a file. The title is the name of the uploaded file.

Is there an easy way of doing this? If I make a call to wp_insert_post in the save_post function, it causes is_uploaded_file to return false. Unfortunately wp_insert_post_data renders before save_post and, therefore, before the title is generated. Any help would be appreciated.