I have been trying to display a video-stream that I get from IP camera. So, I am having some problems with connecting source to a pipeline. Here is the part of the code:

print("Creating source n")
source = Gst.ElementFactory.make('rtspsrc', 'rtspt-source')
if not source:
    sys.stderr.write("Unable to create source n")

print("Creating depay n")
depay = Gst.ElementFactory.make('rtph264depay', 'depay')
if not depay:
    sys.stderr.write("Unable to create depay n")
e to create converter n")

source.set_property('latency', 0)
source.set_property('location', uri_name)

def on_pad_added(source, pad, depay):
    print("Linking source and depayloader n")
    sink_pad = depay.get_static_pad('sink')
    if not sink_pad.is_linked():
        pad.link(sink_pad)
        rint("Source has been succefully linked to depayloadern")
    
source.connect('pad-added', on_pad_added, depay)

And I am getting this error:

Error: gst-stream-error-quark: Internal data stream error. (1): ../gst/rtsp/gstrtspsrc.c(6252): 
gst_rtspsrc_loop (): /GstPipeline:pipeline0/GstRTSPSrc:rtspt-source:
streaming stopped, reason not-linked (-1)

Obviosly, I can’t just link source to depay, so I don’t really know how I should resolve this.