Can you try
!./tao-converter -k $KEY
-p Input,1x3x384x1248,1x3x384x1248,1x3x384x1248
-o BatchedNMS
-e trt_yolo_resnet18.fp32.engine
-t fp32
-i nchw
-m 1
-w 100000000
yolov4_resnet18_epoch_065.etlt
Can you try
!./tao-converter -k $KEY
-p Input,1x3x384x1248,1x3x384x1248,1x3x384x1248
-o BatchedNMS
-e trt_yolo_resnet18.fp32.engine
-t fp32
-i nchw
-m 1
-w 100000000
yolov4_resnet18_epoch_065.etlt