A system is provided for generating a live media segment asset. A first programming schedule that references one or more pre-encoded media assets and/or one or more live input streams is published. A request that comprises one or more identifiers is received. Based on the one or more identifiers in the received request, manifest data and indexed metadata associated with one or more media segments from at least an indexed media content is inserted to a live media segment asset manifest. The indexed media content comprises the one or more pre-encoded media assets and/or one or more live input streams. Accordingly, based on the insertion of the manifest data and indexed metadata associated with the one or more media segments stream from at least the indexed media content referenced in the first programming schedule, and one or more context parameters, the live media segment asset is generated.