What PIDs does Alta insert SCTE-35 data on?

Alta selects a single unused PID based on the pre-existing PMT of the incoming transport stream, and modifies the outgoing PMTs to mark the inclusion of SCTE-35 data. The "cue stream type" descriptor is set to allow all SCTE-35 commands within this single PID.

Since only a single PID is assigned for SCTE-35, the "DPI PID index" field in SCTE-104 messages does not currently affect the placement of Alta's SCTE-35 message output.