from fastvideo import VideoGenerator

OUTPUT_PATH = "video_samples_wan2_2_5B_ti2v"


def main():
    # FastVideo will automatically use the optimal default arguments for the
    # model.
    # If a local path is provided, FastVideo will make a best effort
    # attempt to identify the optimal arguments.
    model_name = "Wan-AI/Wan2.2-TI2V-5B-Diffusers"
    generator = VideoGenerator.from_pretrained(
        model_name,
        # FastVideo will automatically handle distributed setup
        {
            "engine": {
                "num_gpus": 1,
                "use_fsdp_inference": False,  # set to True if GPU is out of memory
                "offload": {
                    "dit": True,
                    "vae": False,
                    "text_encoder": True,
                    "pin_cpu_memory": True,  # set to false if low CPU RAM or hit obscure "CUDA error: Invalid argument"
                    # "image_encoder": False,
                },
            },
        },
    )

    # I2V is triggered just by passing in an image_path argument
    prompt = "Summer beach vacation style, a white cat wearing sunglasses sits on a surfboard. The fluffy-furred feline gazes directly at the camera with a relaxed expression. Blurred beach scenery forms the background featuring crystal-clear waters, distant green hills, and a blue sky dotted with white clouds. The cat assumes a naturally relaxed posture, as if savoring the sea breeze and warm sunlight. A close-up shot highlights the feline's intricate details and the refreshing atmosphere of the seaside."
    image_path = "https://huggingface.co/datasets/YiYiXu/testing-images/resolve/main/wan_i2v_input.JPG"
    video = generator.generate({
        "prompt": prompt,
        "inputs": {
            "image_path": image_path,
        },
        "output": {
            "output_path": OUTPUT_PATH,
            "save_video": True,
        },
    })

    # Generate another video with a different prompt, without reloading the
    # model!

    # T2V mode
    prompt2 = ("A majestic lion strides across the golden savanna, its powerful frame "
               "glistening under the warm afternoon sun. The tall grass ripples gently in "
               "the breeze, enhancing the lion's commanding presence. The tone is vibrant, "
               "embodying the raw energy of the wild. Low angle, steady tracking shot, "
               "cinematic.")
    video2 = generator.generate({
        "prompt": prompt2,
        "output": {
            "output_path": OUTPUT_PATH,
            "save_video": True,
        },
    })


if __name__ == "__main__":
    main()