import cv2
import subprocess
import threading
import time

def stream_mp4_as_rtsp(mp4_file, rtsp_port=8554):
    """Stream MP4 file as RTSP in a loop"""
    rtsp_url = f"rtsp://localhost:{rtsp_port}/stream"
    
    # FFmpeg command to stream MP4 as RTSP
    cmd = [
        'ffmpeg',
        '-re',  # Read input at native frame rate
        '-stream_loop', '-1',  # Loop infinitely
        '-i', mp4_file,
        '-c', 'copy',  # Copy without re-encoding
        '-f', 'rtsp',
        rtsp_url
    ]
    
    print(f"Starting RTSP server...")
    print(f"RTSP URL: {rtsp_url}")
    
    try:
        process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        return process, rtsp_url
    except Exception as e:
        print(f"Error starting RTSP server: {e}")
        return None, None

if __name__ == "__main__":
    mp4_file = input("Enter MP4 file path: ")
    process, url = stream_mp4_as_rtsp(mp4_file)
    
    if process:
        print(f"RTSP stream running at: {url}")
        print("Press Ctrl+C to stop")
        try:
            process.wait()
        except KeyboardInterrupt:
            process.terminate()
            print("RTSP server stopped")