diff --git a/backend/app/api/admin.py b/backend/app/api/admin.py
index 06dbef5..a5a0b75 100644
--- a/backend/app/api/admin.py
+++ b/backend/app/api/admin.py
@@ -460,9 +460,11 @@ def _ffmpeg_webp(data: bytes) -> tuple[bytes, int | None, int | None]:
             run_convert(["-frames:v", "1"], still_vf)
             with open(dst, "rb") as fh:
                 out = fh.read()
-        dims = _ffprobe_video(dst)[0] or {}
-        width = int(dims["width"]) if dims.get("width") else None
-        height = int(dims["height"]) if dims.get("height") else None
+        # ffprobe روی WebP عرض/ارتفاع صفر برمی‌گرداند — ابعاد از خود خروجی با Pillow
+        try:
+            width, height = Image.open(io.BytesIO(out)).size
+        except Exception:
+            width = height = None
         return out, width, height