Display Blender rendering progress in VRChat's Chatbox using OSC

main.py

import bpy
import pythonosc
import argparse
from pythonosc import udp_client
from bpy.app.handlers import persistent

client = udp_client.SimpleUDPClient("127.0.0.1", 9000)

def send(message):
    # print("successfully send message at" + datetime.datetime.now().strftime(" %Y-%m-%d %H:%M:%S") + ".")
    client.send_message("/chatbox/input",[str(message),True])

@persistent
def complete(scene):
    m = "Complete!"
    send(m)

@persistent
def sendosc(scene):
    m = "Rendering..." + " " + str(bpy.context.scene.frame_current)+ "/" + str(bpy.context.scene.frame_end)
    if bpy.context.scene.frame_current % 10 == 0: #毎フレームごとやると送信できなくなるので10フレームおきに送信
        send(m)

bpy.app.handlers.render_post.append(sendosc)
bpy.app.handlers.render_complete.append(complete)