A system is provided that generates a disparate live output stream manifest. In first instance, second live input stream manifest or first pre-encoded media asset manifest is inserted into disparate live output stream manifest based on first transition due to at least one of first event in first live input stream manifest and program start message in second live input stream manifest or first pre-encoded media asset manifest. In second instance, second pre-encoded media asset manifest or second live input stream manifest is inserted based on second transition due to second event in first pre-encoded media asset manifest. Insertion is from location of program start message such that indexed media segments corresponding to second live input stream or second pre-encoded media asset are streamed on disparate live media output stream. Disparate live output stream manifest, generated based on the first or the second instance, is published to content delivery system.