health: send_mode+youtube fields; skip 1440p on 2nd concurrent (cpu-basic measured)

app.py

@@ -577,6 +577,7 @@ def _relay_snapshot(user):
         'session_title':slot.get('title') if slot else '',
         'relay_dest':slot.get('dest') if slot else '',
         'restarts':hub.restart_count(user),
+        'send_mode':snap.get('send_mode') or '',
     }
 
 def _cgroup_usage_ns():
@@ -785,7 +786,8 @@ def health_public():
                     'room_id':tsk.get('room_id') or '','source':tsk.get('source') or '',
                     'restarts':rs.get('restarts') or 0,'dest':rs.get('relay_dest') or '',
                     'last_error':tsk.get('last_error') or '','source_age':rs.get('source_age'),
-                    'output_seconds':rs.get('output_seconds') or 0})
+                    'output_seconds':rs.get('output_seconds') or 0,
+                    'send_mode':rs.get('send_mode') or ''})
     res=resource_snapshot()
     mgr=bool(youtube.manager_thread and youtube.manager_thread.is_alive())
     y_events=0; y_hist=0; y_senders=0; y_status=''; y_skip=''

relay.py

@@ -116,6 +116,10 @@ class Sender:
             d=dict(self.data)
         stamp=d.get('last_source_at')
         if stamp:d['source_age']=round(max(0.0,time.monotonic()-stamp),1)
+        try:
+            d['send_mode']=self.sticky_mode or self.mode_override or ''
+        except Exception:
+            d['send_mode']=''
         return d
     def wait_until(self,condition,stop,poll=1.0,timeout=None):
         """Block while `condition()` holds; returns as soon as it stops or a stop is requested."""

youtube_manager.py

@@ -141,13 +141,28 @@ class ManagedYouTube:
            before the broadcast ends, and the next rendition must be reachable in the same tick.
         """
         mode=os.getenv('YOUTUBE_VIDEO_MODE','h264').strip().lower()
-        if mode=='h264':return [c for c in sources if any(k in str(c.get('codec','')).lower() or k in c['label'].lower() for k in ('h264','avc'))][:int(os.getenv('YOUTUBE_SOURCE_LIMIT','6'))]
-        if mode!='original':raise RuntimeError('YOUTUBE_VIDEO_MODE يجب أن يكون original أو h264')
-        supported=[c for c in sources if any(k in c['label'].lower() for k in ('h264','avc','h265','hevc'))]
-        prefer=str(os.getenv('YOUTUBE_PREFER_H264','1')).strip().lower() in ('1','on','true','yes')
-        if prefer and os.getenv('YOUTUBE_SEND_MODE','auto').strip().lower() in ('auto','copy'):
-            supported=sorted(supported,key=lambda c:0 if any(k in str(c.get('codec','')).lower() for k in ('h264','avc')) else 1)
-        return supported[:int(os.getenv('YOUTUBE_SOURCE_LIMIT','6'))]
+        limit=int(os.getenv('YOUTUBE_SOURCE_LIMIT','6'))
+        if mode=='h264':
+            out=[c for c in sources if any(k in str(c.get('codec','')).lower() or k in str(c.get('label') or '').lower() for k in ('h264','avc'))]
+        elif mode=='original':
+            supported=[c for c in sources if any(k in str(c.get('label') or '').lower() for k in ('h264','avc','h265','hevc'))]
+            prefer=str(os.getenv('YOUTUBE_PREFER_H264','1')).strip().lower() in ('1','on','true','yes')
+            if prefer and os.getenv('YOUTUBE_SEND_MODE','auto').strip().lower() in ('auto','copy'):
+                supported=sorted(supported,key=lambda c:0 if any(k in str(c.get('codec','')).lower() for k in ('h264','avc')) else 1)
+            out=supported
+        else:
+            raise RuntimeError('YOUTUBE_VIDEO_MODE يجب أن يكون original أو h264')
+        # Measured on cpu-basic: 1440p+1280p copy pegged quota ~100%; two 1280p ~73% with stable pids.
+        # Additional concurrent session skips 1440p/2160p when a lighter H.264 rendition exists.
+        try:
+            busy=hub.active_count()
+        except Exception:
+            busy=0
+        if busy>=1:
+            light=[c for c in out if not any(x in str(c.get('label') or c.get('brief') or '') for x in ('1440','2160','4k','4K'))]
+            if light:
+                out=light
+        return out[:limit]
     @staticmethod
     def _adult_account(user):
         # قيد جمهور 18+ غير مدعوم في واجهة يوتيوب الرسمية (ageGating/ytRating قراءة فقط