Python deepstream-imagedata-multistream - cropping rtsp source

I have also tested the rtspsrc in GstBin - this configuration is working.
The problem occurs when I’m using uridecodebin - but only if the converting process is realized in GstBin.

Edit:
Why I need it inside?
Cause if I will have 2 different sources - I want to crop it different way.

So the structure should be like below:

Gstbin_1 (uridecodebin → videoconvert ->nvvideoconvert (src-crop: 0:0:200:200)-> scaling →
Gstbin_2 (uridecodebin → videoconvert ->nvvideoconvert (src-crop: 0:0:300:300))-> scaling →

and after scaling just ->streammux-> inference → …