Changing source file in a webRTC stream

General Discussion
1

I’m using the webRTC bin to stream some video (mp4) files. I’m using a pipeline like this.

FILE_DESC = '''

webrtcbin name=sendrecv bundle-policy=max-bundle 
splitfilesrc location={} ! qtdemux name=demux
demux.video_0 ! h264parse ! rtph264pay config-interval=-1 ! queue ! application/x-rtp,media=video,encoding-name=H264,payload=96 ! sendrecv.
'''

Here I switched to splitfilesrc because it can change the source file dynamically. But unfortunately when I run the webrtc application, when I try to dynamically change the splitfilesrc location to something else I can see that element’s location changes but nothing happens in the webRTC stream. WebRTC stream seems to be frozen.

What could be the issue here? Can I keep the webRTC connection open and change the file source like this?
Are there any alternative methods to this?