from moviepy.editor import ImageSequenceClip
import os

def render_video(frames_dir, output_path, fps=30):
    frames = sorted([
        os.path.join(frames_dir, f)
        for f in os.listdir(frames_dir)
        if f.endswith(".png")
    ])

    clip = ImageSequenceClip(frames, fps=fps)
    clip.write_videofile(output_path, codec="libx264")