Disparate live output stream manifests are generated based on user selection. When current media programming content in an existing first disparate live media output stream is streamed on a media player, one or more processors determine a set of alternate live input streams and/or a pre-encoded media assets, and associated alternate live media output manifests and/or pre-encoded media asset manifests, respectively, based on one or more parameters and metadata associated with the existing first disparate live media output stream. Based on an indicator in an existing first disparate live media output stream manifest, alternate content options are transmitted to the media player. A response is received corresponding to a selection of an alternate live input stream and/or a pre-encoded media asset, and an alternate live input stream manifest and/or pre-encoded media asset manifest is inserted into the existing first disparate live media output stream manifest as next programming media content.