app.py

import gradio as gr
import torch
import numpy as np
import tempfile
import os

from diffusers import LTXLatentUpsamplePipeline
from pipeline_ltx_condition_control import LTXConditionPipeline, LTXVideoCondition
from diffusers.utils import export_to_video, load_video
from torchvision import transforms
import random
import imageio
from PIL import Image, ImageOps
import cv2
import shutil
import glob
from pathlib import Path

import warnings
import logging
warnings.filterwarnings("ignore", category=UserWarning)
warnings.filterwarnings("ignore", category=FutureWarning)
warnings.filterwarnings("ignore", message=".*")
from huggingface_hub import logging as ll
ll.set_verbosity_error()
ll.set_verbosity_warning()
ll.set_verbosity_info()
ll.set_verbosity_debug()
logger = logging.getLogger("AducDebug")
logging.basicConfig(level=logging.DEBUG)
logger.setLevel(logging.DEBUG)

FPS = 24
dtype = torch.bfloat16
device = "cuda" if torch.cuda.is_available() else "cpu"

base_model_repo = "Lightricks/LTX-Video"
print(f"Carregando a arquitetura completa da pipeline de {base_model_repo}...")
pipeline = LTXConditionPipeline.from_pretrained(
    base_model_repo,
    torch_dtype=dtype,
    cache_dir=os.getenv("HF_HOME_CACHE"),
    token=os.getenv("HF_TOKEN"),
)

# 2. Definir a URL para o arquivo de pesos FP8 que contém apenas o TRANSFORMER.
fp8_transformer_weights_url = "https://huggingface.co/Lightricks/LTX-Video/ltxv-13b-0.9.8-distilled-fp8.safetensors"
print(f"Sobrescrevendo pesos do Transformer com o arquivo FP8 de: {fp8_transformer_weights_url}")

pipeline.load_lora_weights(fp8_transformer_weights_url, from_diffusers=True)

print("Carregando upsampler...")
pipe_upsample = LTXLatentUpsamplePipeline.from_pretrained(
    "Lightricks/ltxv-spatial-upscaler-0.9.7",
    cache_dir=os.getenv("HF_HOME_CACHE"),
    vae=pipeline.vae, 
    torch_dtype=dtype
)

print("Movendo modelos para o dispositivo...")
pipeline.to(device)
pipe_upsample.to(device)
pipeline.vae.enable_tiling()

current_dir = Path(__file__).parent

def cleanup_session_files(request: gr.Request):
    """Limpa arquivos temporários da sessão quando o usuário se desconecta."""
    try:
        session_id = request.session_hash
        session_dir = os.path.join("/tmp/gradio", session_id)
        if os.path.exists(session_dir):
            shutil.rmtree(session_dir)
            print(f"Limpou o diretório da sessão: {session_dir}")
    except Exception as e:
        print(f"Erro durante a limpeza da sessão: {e}")

def read_video(video) -> torch.Tensor:
    """Lê um arquivo de vídeo e converte para um tensor torch."""
    to_tensor_transform = transforms.ToTensor()
    if isinstance(video, str):
        video_tensor = torch.stack([to_tensor_transform(img) for img in imageio.get_reader(video)])
    else:
        video_tensor = torch.stack([to_tensor_transform(img) for img in video])
    return video_tensor


def round_to_nearest_resolution_acceptable_by_vae(height, width, vae_temporal_compression_ratio):
    """Arredonda a resolução para valores aceitáveis pelo VAE."""
    height = height - (height % vae_temporal_compression_ratio)
    width = width - (width % vae_temporal_compression_ratio)
    return height, width


# A assinatura da função volta a aceitar argumentos individuais para compatibilidade com o Gradio
def generate_video(
    condition_image_1,
    condition_strength_1,
    condition_frame_index_1,
    condition_image_2,
    condition_strength_2,
    condition_frame_index_2,
    prompt,
    duration=3.0,
    negative_prompt="worst quality, inconsistent motion, blurry, jittery, distorted",
    height=768,
    width=1152,
    num_inference_steps=7,
    guidance_scale=1.0,
    seed=0,
    randomize_seed=False,
    progress=gr.Progress(track_tqdm=True)
):
    try:
        # Lógica para agrupar as condições *dentro* da função
        # Cálculo de frames e resolução
        num_frames = int(duration * FPS) + 1
        temporal_compression = pipeline.vae_temporal_compression_ratio
        num_frames = ((num_frames - 1) // temporal_compression) * temporal_compression + 1
        
        downscale_factor = 2 / 3
        downscaled_height = int(height * downscale_factor)
        downscaled_width = int(width * downscale_factor)
        downscaled_height, downscaled_width = round_to_nearest_resolution_acceptable_by_vae(
            downscaled_height, downscaled_width, pipeline.vae_temporal_compression_ratio
        )
        
        
        
        conditions = []
        if condition_image_1 is not None:
            condition_image_1 = ImageOps.fit(condition_image_1, (downscaled_width, downscaled_height), Image.LANCZOS)
            conditions.append(LTXVideoCondition(
                image=condition_image_1,
                strength=condition_strength_1,
                frame_index=int(condition_frame_index_1)
            ))
        if condition_image_2 is not None:
            condition_image_2 = ImageOps.fit(condition_image_2, (downscaled_width, downscaled_height), Image.LANCZOS)
            conditions.append(LTXVideoCondition(
                image=condition_image_2,
                strength=condition_strength_2,
                frame_index=int(condition_frame_index_2)
            ))

        pipeline_args = {}
        if conditions:
            pipeline_args["conditions"] = conditions

        # Manipulação da seed
        if randomize_seed:
            seed = random.randint(0, 2**32 - 1)

                
        # ETAPA 1: Geração do vídeo em baixa resolução
        latents = pipeline(
            prompt=prompt,
            negative_prompt=negative_prompt,
            width=downscaled_width,
            height=downscaled_height,
            num_frames=num_frames,
            timesteps=[1000, 993, 987, 981, 975, 909, 725, 0.03],
            decode_timestep=0.05,
            decode_noise_scale=0.025,
            image_cond_noise_scale=0.0,
            guidance_scale=guidance_scale,
            guidance_rescale=0.7,
            generator=torch.Generator().manual_seed(seed),
            output_type="latent",
            **pipeline_args
        ).frames

        # ETAPA 2: Upscale dos latentes
        #upscaled_height, upscaled_width = downscaled_height * 2, downscaled_width * 2
        #upscaled_latents = pipe_upsample(
        #    latents=latents,
        #    output_type="latent"
        #).frames       

        print(f"ETAPA 1 latents {latents.shape}")
        
        

        # ETAPA 3: Denoise final em alta resolução
        final_video_frames_np = pipeline(
            prompt=prompt,
            negative_prompt=negative_prompt,
            width=downscaled_width,
            height=downscaled_height,
            num_frames=num_frames,
            denoise_strength=0.999,
            timesteps=[1000, 909, 725, 421, 0],
            latents=latents,
            decode_timestep=0.05,
            decode_noise_scale=0.025,
            image_cond_noise_scale=0.0,
            guidance_scale=guidance_scale,
            guidance_rescale=0.7,
            generator=torch.Generator(device="cuda").manual_seed(seed),
            output_type="np",
            **pipeline_args
        ).frames[0]

        print(f"ETAPA 3 final_video_frames_np {final_video_frames_np.shape}")

        # Exportação para arquivo MP4
        video_uint8_frames = [(frame * 255).astype(np.uint8) for frame in final_video_frames_np]
        output_filename = "output.mp4"
        with imageio.get_writer(output_filename, fps=FPS, quality=8, macro_block_size=1) as writer:
             for frame_idx, frame_data in enumerate(video_uint8_frames):
                progress((frame_idx + 1) / len(video_uint8_frames), desc="Codificando frames do vídeo...")
                writer.append_data(frame_data)

        return output_filename, seed
        
    except Exception as e:
        print(f"Ocorreu um erro: {e}")
        return None, seed

# Interface Gráfica com Gradio
with gr.Blocks(theme=gr.themes.Ocean(font=[gr.themes.GoogleFont("Lexend Deca"), "sans-serif"]), delete_cache=(60, 900)) as demo:
    gr.Markdown(
        """
        # Geração de Vídeo com LTX
        **Crie vídeos a partir de texto e imagens de condição usando o modelo LTX-Video.**
        """
    )
    
    with gr.Row():
        with gr.Column(scale=1):
    
            prompt = gr.Textbox(
                label="Prompt",
                placeholder="Descreva o vídeo que você quer gerar...",
                lines=3,
                value="O Coringa em seu icônico terno roxo e cabelo verde, dançando sozinho em um quarto escuro e decadente. Seus movimentos são erráticos e imprevisíveis, alternando entre graciosos e caóticos enquanto ele se perde no momento. A câmera captura seus gestos teatrais, sua dança refletindo sua personalidade desequilibrada. Iluminação temperamental com sombras dançando pelas paredes, criando uma atmosfera de bela loucura."
            )
            
            with gr.Accordion("Imagem de Condição 1", open=True):
                condition_image_1 = gr.Image(label="Imagem de Condição 1", type="pil")
                with gr.Row():
                    condition_strength_1 = gr.Slider(label="Peso (Strength)", minimum=0.0, maximum=1.0, step=0.05, value=1.0)
                    condition_frame_index_1 = gr.Number(label="Frame", value=0, precision=0)

            with gr.Accordion("Imagem de Condição 2", open=False):
                condition_image_2 = gr.Image(label="Imagem de Condição 2", type="pil")
                with gr.Row():
                    condition_strength_2 = gr.Slider(label="Peso (Strength)", minimum=0.0, maximum=1.0, step=0.05, value=1.0)
                    condition_frame_index_2 = gr.Number(label="Frame", value=0, precision=0)
            
            duration = gr.Slider(label="Duração (segundos)", minimum=1.0, maximum=10.0, step=0.5, value=2)
            
            with gr.Accordion("Configurações Avançadas", open=False):
                negative_prompt = gr.Textbox(label="Prompt Negativo", placeholder="O que você não quer no vídeo...", lines=2, value="pior qualidade, movimento inconsistente, embaçado, tremido, distorcido")
                with gr.Row():
                    height = gr.Slider(label="Altura", minimum=256, maximum=1536, step=32, value=768)
                    width = gr.Slider(label="Largura", minimum=256, maximum=1536, step=32, value=1152)
                
                num_inference_steps = gr.Slider(label="Passos de Inferência", minimum=5, maximum=10, step=1, value=7, visible=False)
                
                with gr.Row():
                    guidance_scale = gr.Slider(label="Escala de Orientação (Guidance)", minimum=1.0, maximum=5.0, step=0.1, value=1.0)
                    
                with gr.Row():
                    randomize_seed = gr.Checkbox(label="Seed Aleatória", value=True)
                    seed = gr.Number(label="Seed", value=0, precision=0)
            
            generate_btn = gr.Button("Gerar Vídeo", variant="primary", size="lg")
        
        with gr.Column(scale=1):          
            output_video = gr.Video(label="Vídeo Gerado", height=400)
    
    # CORREÇÃO: A lista de inputs agora é "plana", contendo apenas componentes do Gradio
    generate_btn.click(
        fn=generate_video,
        inputs=[
            condition_image_1,
            condition_strength_1,
            condition_frame_index_1,
            condition_image_2,
            condition_strength_2,
            condition_frame_index_2,
            prompt,
            duration,
            negative_prompt,
            height,
            width,
            num_inference_steps,
            guidance_scale,
            seed,
            randomize_seed,
        ],
        outputs=[output_video, seed],
        show_progress=True
    )

    demo.unload(cleanup_session_files)


if __name__ == "__main__":
    demo.queue().launch(server_name="0.0.0.0", server_port=7860, debug=True, show_error=True)