The thesis proposes to follow the paths of contemporary writers and filmmakers in a world of increasing dilution of the boundaries between artistic mediums and media. The current context of intense permeability and mobility between the audiovisual and written languages and continuous penetration of market mechanisms in the interaction between the two medias categories offers severe challenges to some of the consolidateds definitions of the fields of art. Among them, the notion of authorship especially passes through a process of progressive instability. From the analysis of the work of Marcal Aquino, Beto Brant and Lourenço Mutarelli, this research will investigate the impact of the current context on the works of these artists and how each may respond to the dilemmas that the new situation presents to them.