20260430_001744-feat: PyTorch CUDA + SAM2 GPU inference, video thumbnail, real FPS + configurable parse FPS, DICOM batch import

backend/main.py

@@ -30,7 +30,7 @@ def _seed_default_project_sync() -> None:
     """Synchronously seed the default video project on first startup."""
     import cv2
     from models import Project, Frame
-    from services.frame_parser import parse_video, upload_frames_to_minio
+    from services.frame_parser import parse_video, upload_frames_to_minio, extract_thumbnail
 
     db = SessionLocal()
     try:
@@ -46,6 +46,8 @@ def _seed_default_project_sync() -> None:
             name="Data_MyVideo_1",
             description="默认演示视频",
             status="pending",
+            source_type="video",
+            parse_fps=30.0,
         )
         db.add(project)
         db.commit()
@@ -67,7 +69,20 @@ def _seed_default_project_sync() -> None:
                 f.write(data)
             output_dir = os.path.join(tmp_dir, "frames")
             os.makedirs(output_dir, exist_ok=True)
-            frame_files = parse_video(local_path, output_dir, fps=30, max_frames=100)
+            frame_files, original_fps = parse_video(local_path, output_dir, fps=30, max_frames=100)
+            project.original_fps = original_fps
+
+            # Extract thumbnail
+            thumbnail_path = os.path.join(tmp_dir, "thumbnail.jpg")
+            try:
+                extract_thumbnail(local_path, thumbnail_path)
+                with open(thumbnail_path, "rb") as f:
+                    thumb_data = f.read()
+                thumb_object = f"projects/{project.id}/thumbnail.jpg"
+                upload_file(thumb_object, thumb_data, content_type="image/jpeg", length=len(thumb_data))
+                project.thumbnail_url = thumb_object
+            except Exception as exc:  # noqa: BLE001
+                logger.warning("Thumbnail extraction failed: %s", exc)
 
             object_names = upload_frames_to_minio(frame_files, project.id)