message: batchsize dynamic is set to index 0.
diff: @@ -1303,7 +1303,7 @@ void ONNXImporter::parseReduce(LayerParams& layerParams, const opencv_onnx::Node
  layerParams.set("dim", DictValue::arrayInt(&targetShape[0], targetShape.size()));
  // Set batchsize dim as dynamic to be compatible with batch size >= 2.
  - if (targetShape[0] == 1 && targetShape.size() > 1)
  + if (targetShape.size() > 1)
  {
  std::vector<int> dynamicAxes = {0}; // The index of batchsize dim is 0.
  std::vector<int> inputIndices = {0};
  