Refactor _extract_psch_and_pkey function to handle multiple PSCH lines and return the last one found

Author: aitschti

proxy_module.py

@@ -288,15 +288,21 @@ def _decode_m3u8_mouflon_files(m3u8_text: str) -> str:
 
 def _extract_psch_and_pkey(m3u8_text):
     """Return (psch_version, pkey) from #EXT-X-MOUFLON:PSCH line if present."""
+    psch_lines = []
     for line in m3u8_text.splitlines():
         l = line.strip()
         if not l:
             continue
         if l.upper().startswith('#EXT-X-MOUFLON:PSCH'):
-            parts = l.split(':', 3)
-            version = parts[2].lower() if len(parts) > 2 else ''
-            pkey = parts[3] if len(parts) > 3 else ''
-            return version, pkey
+            psch_lines.append(l)
+    if psch_lines:
+        # Use the last (second) PSCH line if multiple are found
+        last_line = psch_lines[-1]
+        parts = last_line.split(':', 3)
+        version = parts[2].lower() if len(parts) > 2 else ''
+        pkey = parts[3] if len(parts) > 3 else ''
+        return version, pkey
+        
     return '', ''
 
 def _make_absolute(base, ref):