AUTOMATED MEDIA PUBLISHING

A method of generating a rendition of a media composition is disclosed. The media composition includes a compositional object that references a source media asset and which is associated with an editorial rendition rule specified by an editor of the media composition using a media composition application. The editorial rendition rule is a spatial editorial rendition rule having spatial parameters, the spatial parameters comprising a framing box that defines a portion of a video frame of the compositional object of the media composition. A rendition profile is received that specifies media essence encoding parameters for the rendition of the media composition, the media essence encoding parameters specifying an aspect ratio of a target display. The aspect ratio of the target display for the rendition is different from the aspect ratio of the framing box. The rendition is generated from the source media asset of the media composition for the target display in accordance with the editorial rendition rule and the media essence encoding parameters for the rendition of the media composition, the generating comprising prioritizing a first portion of the source media asset of the composition that lies within the framing box for inclusion within the rendition.