RTSPSRC Set State Null Deadlock

Uku · October 15, 2024, 1:53pm

Hey, I happened to randomly find this source and it worked as a fix for me:

GStreamer/gst-python/blob/master/examples/dynamic_src.py

#!/usr/bin/env python3

'''
Simple example to demonstrate dynamically adding and removing source elements
to a playing pipeline.
'''

import sys
import random

import gi
gi.require_version('Gst', '1.0')
gi.require_version('GLib', '2.0')
gi.require_version('GObject', '2.0')
from gi.repository import GLib, GObject, Gst

class ProbeData:
    def __init__(self, pipe, src):
        self.pipe = pipe
        self.src = src

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Apparently the issue is setting the pipeline to NULL from the streaming thread as explained in the comment.
All I had to do for this to work was:

def dispose_src_callback(self):
    if self.source_bin.set_state(Gst.State.NULL) != Gst.StateChangeReturn.SUCCESS:
        logger.error(f"Couldn't set state to NULL for {self.source_bin.get_name()}")
    self.source_bin = None
    logger.warning("Source removed")

self.source_bin.unlink(self.rtsp_connect_element)
self.pipeline.remove(self.source_bin)
GLib.idle_add(self.dispose_src_callback)