The rtsp cound not read by deepstream4.0 but played well with ffplay

Hi, DaneLLL, could your tell me how to get the results of classification of sgie with deepstream 4.0 c++ sdk? we realized that in deepsteam 3.0 but the data structure in deepstream 4.0 has been changed, i just found no related deepstream example in a whole day. could you show me a example? thanks!