def convert_ppt_to_images(input_file, output_folder):
    """
    Converts a PowerPoint file (.ppt or .pptx) to images using LibreOffice.
    Each slide is saved as a separate image in the output folder.
    """
    if not os.path.exists(output_folder):
        os.makedirs(output_folder)

    # Convert the PowerPoint file to images using LibreOffice
    command = [
        'libreoffice',
        '--headless',
        '--convert-to', 'png',
        '--outdir', output_folder,
        input_file
    ]
    try:
        subprocess.run(command, check=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        print(f"PPT file converted to images: {input_file}")
    except subprocess.CalledProcessError as e:
        print(f"Error converting PPT to images: {e.stderr.decode()}")
        return False

    # Rename the generated images to follow the naming convention
    base_name = os.path.splitext(os.path.basename(input_file))[0]
    for i, file_name in enumerate(sorted(os.listdir(output_folder))):
        if file_name.endswith('.png'):
            new_name = f"{base_name}_{i + 1}.png"
            os.rename(os.path.join(output_folder, file_name), os.path.join(output_folder, new_name))
    return True