import os
import json

env_list = ['Env1', 'Env2', ...]  # Env list

video_index_list = []

def list_files_from_local(directory):
    """Get all .MP4 video files from your local directory"""
    if not os.path.exists(directory):  
        return []
    return sorted([f for f in os.listdir(directory) if f.endswith('.mp4')])

def generate_video_index(base_path):
    for env in env_list:
        edited_dir = os.path.join(base_path, f"{env}_Edited")
        masked_dir = os.path.join(base_path, f"{env}_Masked")
        unedited_dir = os.path.join(base_path, f"{env}_Unedited")

        unedited_videos = list_files_from_local(unedited_dir)

        for video_name in unedited_videos:
            edited_path = os.path.join(edited_dir, video_name)
            masked_path = os.path.join(masked_dir, video_name)
            unedited_path = os.path.join(unedited_dir, video_name)

            if os.path.exists(masked_path) and os.path.exists(edited_path):
                video_index_list.append({
                    "edited": edited_path,
                    "masked": masked_path,
                    "unedited": unedited_path
                })

base_folder = "Your path here"  
generate_video_index(base_folder)

json_filename = os.path.join(base_folder, "video_dataset_index.json")
with open(json_filename, "w", encoding="utf-8") as f:
    json.dump(video_index_list, f, indent=4)

print(f"JSON file has been generated:{json_filename}，total {len(video_index_list)} pairs.")