20260429_232813-fix: video frame display pipeline — default project seed, presigned URLs, Canvas/FrameTimeline real frames, upload-parse flow

backend/routers/media.py

@@ -71,6 +71,24 @@ async def upload_media(
             logger.info("Linked upload to project_id=%s", project_id)
         else:
             logger.warning("Project id=%s not found for upload linkage", project_id)
+    else:
+        # Auto-create a project named after the file
+        project = Project(
+            name=file.filename,
+            description="Auto-created from upload",
+            status="pending",
+            video_path=object_name,
+        )
+        db.add(project)
+        db.commit()
+        db.refresh(project)
+        project_id = project.id
+        object_name = f"uploads/{project_id}/{file.filename}"
+        # Re-upload with corrected path
+        upload_file(object_name, data, content_type=file.content_type or "application/octet-stream", length=len(data))
+        project.video_path = object_name
+        db.commit()
+        logger.info("Auto-created project id=%s for upload %s", project_id, file.filename)
 
     # TODO: enqueue async parsing job (Celery / background task)
     logger.info("Upload complete: %s (size=%d bytes). Async parsing queued.", object_name, len(data))
@@ -79,6 +97,7 @@ async def upload_media(
         "object_name": object_name,
         "file_url": file_url,
         "size": len(data),
+        "project_id": project_id,
         "message": "Upload successful. Parsing job queued.",
     }
 

backend/routers/projects.py

@@ -9,6 +9,7 @@ from sqlalchemy.orm import Session
 from database import get_db
 from models import Project, Frame
 from schemas import ProjectCreate, ProjectOut, ProjectUpdate, FrameCreate, FrameOut
+from minio_client import get_presigned_url
 
 logger = logging.getLogger(__name__)
 router = APIRouter(prefix="/api/projects", tags=["Projects"])
@@ -40,7 +41,10 @@ def create_project(payload: ProjectCreate, db: Session = Depends(get_db)) -> Pro
 )
 def list_projects(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)) -> List[Project]:
     """Retrieve a paginated list of projects."""
-    return db.query(Project).offset(skip).limit(limit).all()
+    projects = db.query(Project).offset(skip).limit(limit).all()
+    for p in projects:
+        p.frame_count = len(p.frames)
+    return projects
 
 
 @router.get(
@@ -53,6 +57,7 @@ def get_project(project_id: int, db: Session = Depends(get_db)) -> Project:
     project = db.query(Project).filter(Project.id == project_id).first()
     if not project:
         raise HTTPException(status_code=404, detail="Project not found")
+    project.frame_count = len(project.frames)
     return project
 
 
@@ -138,7 +143,7 @@ def list_frames(
     if not project:
         raise HTTPException(status_code=404, detail="Project not found")
 
-    return (
+    frames = (
         db.query(Frame)
         .filter(Frame.project_id == project_id)
         .order_by(Frame.frame_index)
@@ -146,6 +151,9 @@ def list_frames(
         .limit(limit)
         .all()
     )
+    for frame in frames:
+        frame.image_url = get_presigned_url(frame.image_url, expires=3600)
+    return frames
 
 
 @router.get(