in the attached file , input-tensor-from-meta is 0, do you mean preprocess +nvinfer can work if input-tensor-from-meta is 1?
if yes, nvinfer is opensource , please add logs in nvinfer to debug, please refer to DeepStream SDK FAQ - #9 by mchi, dump_infer_input_to_file.patch.txt is used to dump the image fed to the input layer of the nework, for exmaple, if the dimension and format of your classification is 3:150:150 & RGB, this change dumps a 150x150 RGB viewable image.