Live Streaming how is supposed to work?

[GiuseppeP]

I'm trying this project, it works fine for file sharing, but when I try to live streming I don't understand how should I send it the stream.

I run:
python3 PyPPSPP.py --tracker IP_tracker --livesrc
then in another shell (and with different UDP Port):
python3 PyPPSPP.py --tracker IP_tracker --live --swarmid ID_from_livesrc

I tried both TCP and UDP, but the results is:

[INFO] 2018-10-18 12:00:10,883 connection_made callback
[INFO] 2018-10-18 12:00:10,884 File found. Checking integrity
[WARNING] 2018-10-18 12:00:10,884 Given file test is empty!
[INFO] 2018-10-18 12:00:10,884 Root Hash calculation failed. Creating new file
[INFO] 2018-10-18 12:00:10,905 Created empty file and started chunk selection
[INFO] 2018-10-18 12:00:10,906 Created Swarm with ID: 192407989539a163bb7d61f185665b49b3666f1b; Our UUID: 004edef1-55b3-419a-b06b-f4a1b678d277
[WARNING] 2018-10-18 12:00:10,932 Received data from tracker for unknown swarm! Swarm ID:192407989539a163bb7d61f185665b49b3666f1b
*[ERROR] 2018-10-18 12:00:11,907 Exception in callback Swarm.ChunkRequest()
handle: <TimerHandle when=28588.194920896 Swarm.ChunkRequest()>
Traceback (most recent call last):
File "/usr/lib/python3.5/asyncio/events.py", line 125, in _run
self._callback(self._args)
File "/home/giuseppe/ppspp/PyPPSPP-master/PyPPSPP/Swarm.py", line 454, in ChunkRequest
raise AssertionError("Live Source and missing chunks!")
AssertionError: Live Source and missing chunks!
[INFO] 2018-10-18 12:00:13,908 # Have/Missing 0/27419; Down ch/s: 0; Speed up/down: 0/0 Bps; Members Known/Valid: 0/0

I have to sent the stream to the UDP port of livesrc or I have to pass it a standard MP4 file ? In this case it fail because in a live streaming the file change its size.