Add FFmpeg RASC DLTA calc PoC

ffmpeg-rasc-dlta-calc-poc/scripts/run_calc_pop.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+bin="${1:-./ffmpeg_rasc_dlta_calc_poc}"
+marker="/tmp/ffmpeg_rasc_exec_demo"
+
+rm -f "$marker"
+"$bin"
+sleep 2
+
+if [ -f "$marker" ]; then
+  echo "marker:present"
+else
+  echo "marker:missing"
+  exit 1
+fi
+
+if command -v powershell.exe >/dev/null 2>&1; then
+  powershell.exe -NoProfile -EncodedCommand RwBlAHQALQBQAHIAbwBjAGUAcwBzACAAQwBhAGwAYwB1AGwAYQB0AG8AcgBBAHAAcAAgAC0ARQByAHIAbwByAEEAYwB0AGkAbwBuACAAUwBpAGwAZQBuAHQAbAB5AEMAbwBuAHQAaQBuAHUAZQAgAHwAIABTAGUAbABlAGMAdAAtAE8AYgBqAGUAYwB0ACAAUAByAG8AYwBlAHMAcwBOAGEAbQBlACwASQBkACwAUwB0AGEAcgB0AFQAaQBtAGUA 2>/dev/null || true
+fi