As one example, a method includes analyzing profile metadata for each of a plurality of ABR program streams within a lookahead window from a current chunk boundary to identify at least one target event at a chunk boundary. ABR profiles for chunks at the target event chunk boundary are allocated to fit within the channel bandwidth and achieve a predetermined target quality level for the chunks at the target event chunk boundary. In response to each target event, ABR profiles for each of the unallocated chunks within the lookahead window are selected by adjusting the ABR profiles for each of the unallocated chunks to fit within the predetermined bandwidth constrained by the ABR profiles allocated for the chunks at the target event chunk boundary. An ABR profile for a given chunk at the current chunk boundary is allocated based on the selected ABR profiles.