In　order　to　address　the　problem　of　balancing　real-time　performance　and　communication　quality　in　real-time　video　transmission,　this　paper　proposes　a　packet-level　sliding　window　FEC　encoding　scheme　that　improves　the　probability　of　single-frame　recovery　by　repeating　the　encoded　data　of　the　previous　window.　Based　on　this,　the　FEC　adaptive　redundancy　algorithm　is　improved　according　to　the　playable　frame　rate,　and　a　delay　control　algorithm　is　combined　to　reduce　the　total　decoding　delay　of　video　transmission.　Experimental　analysis　shows　that　the　proposed　transmission　scheme　performs　better　than　traditional　transmission　schemes　in　terms　of　playable　frame　rate　(PFR)　and　peak　signal-to-noise　ratio　(PSNR),　and　has　lower　delay.　©　2023　IEEE.