I have this python script that is supposed to record my screen, on mac os.

import cv2
import numpy as np
from PIL import ImageGrab
import subprocess
import time

def record_screen():
    # Define the screen resolution
    screen_width, screen_height = 1440, 900  # Adjust this to match your screen resolution
    fps = 30  # Target FPS for recording

    # Define the ffmpeg command
    ffmpeg_cmd = [
        'ffmpeg',
        '-y',  # Overwrite output file if it exists
        '-f', 'rawvideo',
        '-vcodec', 'rawvideo',
        '-pix_fmt', 'bgr24',
        '-s', f'{screen_width}x{screen_height}',  # Size of one frame
        '-r', str(fps),  # Input frames per second
        '-i', '-',  # Input from pipe
        '-an',  # No audio
        '-vcodec', 'libx264',
        '-pix_fmt', 'yuv420p',
        '-crf', '18',  # Higher quality
        '-preset', 'medium',  # Encoding speed
        'screen_recording.mp4'
    ]

    # Start the ffmpeg process
    ffmpeg_process = subprocess.Popen(ffmpeg_cmd, stdin=subprocess.PIPE)

    frame_count = 0
    start_time = time.time()

    while True:
        # Capture the screen
        img = ImageGrab.grab()
        img_np = np.array(img)

        # Convert and resize the frame
        frame = cv2.cvtColor(img_np, cv2.COLOR_RGB2BGR)
        resized_frame = cv2.resize(frame, (screen_width, screen_height))

        # Write the frame to ffmpeg
        ffmpeg_process.stdin.write(resized_frame.tobytes())

        # Display the frame
        cv2.imshow('Screen Recording', resized_frame)

        # Stop recording when 'q' is pressed
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break

    # Close the ffmpeg process
    ffmpeg_process.stdin.close()
    ffmpeg_process.wait()

    # Release everything when job is finished
    cv2.destroyAllWindows()

if __name__ == "__main__":
    record_screen()

As you can see, it should be 30 frames per second, but the problem is that when I open the file afterwards its all sped up. I think it has to do with the frame capture rate as oppose to the encoded rate. I’m not quite sure though. If I try to speed the video down afterwards so that it plays in real time the video is just really choppy. And the higher I make the fps, the faster the video plays, meaning the more I have to slow it down and then its still choppy. I’m pretty sure that it captures frames at a really slow rate and then puts them in a video and plays it back at 30fps. Can anyone fix this? Anything that gets a working screen recorder on mac os I will take.