2026-05-18-20-35-32 修复结果视频关键帧空白

tests/test_api.py

@@ -78,9 +78,18 @@ def test_segment_video_and_compare_frame(tmp_path: Path):
     assert result_capture.isOpened()
     result_frames = int(result_capture.get(cv2.CAP_PROP_FRAME_COUNT) or 0)
     result_fps = float(result_capture.get(cv2.CAP_PROP_FPS) or 0)
+    result_capture.set(cv2.CAP_PROP_POS_FRAMES, 1)
+    ok, carried_overlay = result_capture.read()
     result_capture.release()
     assert result_frames == 18
     assert abs((result_frames / result_fps) - payload["duration"]) < 0.25
+    assert ok
+    yellow_pixels = (
+        (carried_overlay[:, :, 1] > 140)
+        & (carried_overlay[:, :, 2] > 140)
+        & (carried_overlay[:, :, 0] < 150)
+    ).sum()
+    assert yellow_pixels > 0
 
     with video_path.open("rb") as handle:
         compare = client.post(