Server-Side Stitching 33 Audio Bid Flow Audio Player DAI Server Prebid Server Demand Partners 1 stream req 2 request 3 OpenRTB 4 bids 5 VAST 4.1 6 stitched ad companion P_
Server-Side Stitching Audio Bid Flow 33 Listeners never hear the auction. PBS 2 pre-fetches ads, fanning out OpenRTB 3 . Unlike CTV 21 , audio runs minutes early — imp.exp signals the delay. Bids 4 return as VAST 4.1 zero-dimension MediaFiles 5 , stitched into the stream 6 . FIELD NOTES → rqddurs forces exact-second fill for live radio — dead air kills it → 90%+ listen-through; completion is a poor signal — use quartiles → imp.exp warns bidders of delay; <Expires> tells player to discard P_ atd.postindustria.com/33

How It Works

Listeners never hear the auction. PBS [2] pre-fetches ads, fanning out OpenRTB [3]. Unlike CTV {21}, audio runs minutes early — `imp.exp` signals the delay. Bids [4] return as VAST 4.1 zero-dimension MediaFiles [5], stitched into the stream [6].

Field Notes

  • `rqddurs` forces exact-second fill for live radio — dead air kills it
  • 90%+ listen-through; completion is a poor signal — use quartiles
  • `imp.exp` warns bidders of delay; `<Expires>` tells player to discard

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