#!/usr/bin/env python3

import subprocess, os, sys
from constants import *

pid_path = os.path.join("/tmp", PIDFILE)

if os.path.exists(pid_path):
	with open(pid_path, "r") as pid_file:
		check_pid = pid_file.read().strip()

	try:
		os.kill(int(check_pid), 0)
		print(f"ffmpeg is already running. Delete {pid_path} if it actually isn't.")
		sys.exit(0) # apparently ffmpeg is running, just quit and do nothing
	except OSError:
		pass
	
proc = subprocess.Popen([ "/usr/bin/ffmpeg", "-i", WEBCAM_STREAM_URL, "-video_size", "1280x720", "-an", "-f", "flv", "-c:v", "libx264", "-b:v", "500k", "-preset", "veryfast", "-bufsize", "1M", "-maxrate", "500k", TWITCH_SERVER ], stderr=open(os.devnull, "w"))

# write pid into pidfile so we can kill the process later
with open(pid_path, "w") as pid_file:
	pid_file.write(str(proc.pid))
	print(f"Wrote PID {proc.pid} into pidfile")