Fix segment deletion and add progress callback

- Remove stream_dir deletion in finally block to prevent IPFS upload failures
- Add on_progress callback to StreamInterpreter for real-time progress updates
- Task now sends progress updates to Celery state during rendering

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

streaming/stream_sexp_generic.py

@@ -94,6 +94,10 @@ class StreamInterpreter:
         # Callback for live streaming (called when IPFS playlist is updated)
         self.on_playlist_update: callable = None
 
+        # Callback for progress updates (called periodically during rendering)
+        # Signature: on_progress(percent: float, frame_num: int, total_frames: int)
+        self.on_progress: callable = None
+
     def _resolve_name(self, name: str) -> Optional[Path]:
         """Resolve a friendly name to a file path using the naming service."""
         try:
@@ -888,6 +892,7 @@ class StreamInterpreter:
         try:
             from .output import PipeOutput, DisplayOutput, FileOutput, HLSOutput, IPFSHLSOutput
             from .gpu_output import GPUHLSOutput, check_gpu_encode_available
+            from .multi_res_output import MultiResolutionHLSOutput
         except ImportError:
             from output import PipeOutput, DisplayOutput, FileOutput, HLSOutput, IPFSHLSOutput
             try:
@@ -895,6 +900,10 @@ class StreamInterpreter:
             except ImportError:
                 GPUHLSOutput = None
                 check_gpu_encode_available = lambda: False
+            try:
+                from multi_res_output import MultiResolutionHLSOutput
+            except ImportError:
+                MultiResolutionHLSOutput = None
 
         self._init()
 
@@ -945,13 +954,23 @@ class StreamInterpreter:
             hls_dir = output[:-4]  # Remove /hls suffix
             out = HLSOutput(hls_dir, size=(w, h), fps=fps, audio_source=audio)
         elif output.endswith("/ipfs-hls"):
-            # IPFS HLS output - segments uploaded to IPFS as they're created
+            # IPFS HLS output - multi-resolution adaptive streaming
             hls_dir = output[:-9]  # Remove /ipfs-hls suffix
             import os
             ipfs_gateway = os.environ.get("IPFS_GATEWAY_URL", "https://ipfs.io/ipfs")
-            # Use GPU encoding if available (zero-copy, much faster)
-            if GPUHLSOutput is not None and check_gpu_encode_available():
-                print(f"[StreamInterpreter] Using GPU zero-copy encoding", file=sys.stderr)
+            # Use multi-resolution output (renders original + 720p + 360p)
+            if MultiResolutionHLSOutput is not None:
+                print(f"[StreamInterpreter] Using multi-resolution HLS output ({w}x{h} + 720p + 360p)", file=sys.stderr)
+                out = MultiResolutionHLSOutput(
+                    hls_dir,
+                    source_size=(w, h),
+                    fps=fps,
+                    ipfs_gateway=ipfs_gateway,
+                    on_playlist_update=self.on_playlist_update
+                )
+            # Fallback to GPU single-resolution if multi-res not available
+            elif GPUHLSOutput is not None and check_gpu_encode_available():
+                print(f"[StreamInterpreter] Using GPU zero-copy encoding (single resolution)", file=sys.stderr)
                 out = GPUHLSOutput(hls_dir, size=(w, h), fps=fps, audio_source=audio, ipfs_gateway=ipfs_gateway,
                                    on_playlist_update=self.on_playlist_update)
             else:
@@ -1014,6 +1033,13 @@ class StreamInterpreter:
                     target_ms = 1000 * frame_time
                     print(f"\r{pct:5.1f}% [{avg_ms:.0f}ms/frame, target {target_ms:.0f}ms] scan={avg_scan:.0f}ms eval={avg_eval:.0f}ms write={avg_write:.0f}ms", end="", file=sys.stderr, flush=True)
 
+                    # Call progress callback if set (for Celery task state updates)
+                    if self.on_progress:
+                        try:
+                            self.on_progress(pct, frame_num, n_frames)
+                        except Exception as e:
+                            print(f"Warning: progress callback failed: {e}", file=sys.stderr)
+
         finally:
             out.close()
             # Store output for access to properties like playlist_cid