<python>
# -*- coding: utf-8 -*-
"""VQGAN+CLIP (z+quantize method con augmentations, interfaz amigable).ipynb

Automatically generated by Colaboratory.

Original file is located at
    https://colab.research.google.com/drive/1go6YwMFe5MX6XM9tv-cnQiSTU50N9EeT

# Genera imágenes desde frases de texto con VQGAN y CLIP (método z+quantize con augmentations).

Notebook hecho por Katherine Crowson (https://github.com/crowsonkb, https://twitter.com/RiversHaveWings). El método BigGAN+CLIP original fue hecho por https://twitter.com/advadnoun. Traducido y agregadas explicaciones, y modificaciones por Eleiber#8347, y la interfaz amigable fue hecha gracias a Abulafia#3734.

Para un tutorial detallado de cómo usarlo, recomiendo [visitar este artículo](https://tuscriaturas.miraheze.org/wiki/Ayuda:Crear_imágenes_con_VQGAN+CLIP), hecho por Jakeukalane#2767 y Avengium (Ángel)#3715
"""

# @title Licensed under the MIT License

# Copyright (c) 2021 Katherine Crowson

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

!nvidia-smi

# @title Instalación de bibliotecas
# @markdown Esta celda tardará un poco porque tiene que descargar varias librerías
 
print("Descargando CLIP...")
!git clone https://github.com/openai/CLIP                 &> /dev/null
 
print("Instalando bibliotecas de Python para IA...")
!git clone https://github.com/CompVis/taming-transformers &> /dev/null
!pip install ftfy regex tqdm omegaconf pytorch-lightning  &> /dev/null
!pip install kornia                                       &> /dev/null
!pip install einops                                       &> /dev/null
!pip install wget                                         &> /dev/null
 
print("Instalando bibliotecas para manejo de metadatos...")
!pip install stegano                                      &> /dev/null
!apt install exempi                                       &> /dev/null
!pip install python-xmp-toolkit                           &> /dev/null
!pip install imgtag                                       &> /dev/null
!pip install pillow==7.1.2                                &> /dev/null
 
print("Instalando bibliotecas de Python para creación de vídeos...")
!pip install imageio-ffmpeg                               &> /dev/null
!mkdir steps
print("Instalación finalizada.")

#@title Selección de modelos a descargar
#@markdown Por defecto, el notebook descarga el modelo 16384 de ImageNet. Existen otros que no se descargan por defecto, ya que sería en vano si no los vas a usar, así que si quieres usarlos, simplemente selecciona los modelos a descargar.

imagenet_1024 = False #@param {type:"boolean"}
imagenet_16384 = True #@param {type:"boolean"}
gumbel_8192 = False #@param {type:"boolean"}
coco = False #@param {type:"boolean"}
faceshq = False #@param {type:"boolean"}
wikiart_1024 = False #@param {type:"boolean"}
wikiart_16384 = False #@param {type:"boolean"}
sflckr = False #@param {type:"boolean"}
ade20k = False #@param {type:"boolean"}
ffhq = False #@param {type:"boolean"}
celebahq = False #@param {type:"boolean"}

if imagenet_1024:
  !curl -L -o vqgan_imagenet_f16_1024.yaml -C - 'https://heibox.uni-heidelberg.de/d/8088892a516d4e3baf92/files/?p=%2Fconfigs%2Fmodel.yaml&dl=1' #ImageNet 1024
  !curl -L -o vqgan_imagenet_f16_1024.ckpt -C - 'https://heibox.uni-heidelberg.de/d/8088892a516d4e3baf92/files/?p=%2Fckpts%2Flast.ckpt&dl=1'  #ImageNet 1024
if imagenet_16384:
  !curl -L -o vqgan_imagenet_f16_16384.yaml -C - 'https://heibox.uni-heidelberg.de/d/a7530b09fed84f80a887/files/?p=%2Fconfigs%2Fmodel.yaml&dl=1' #ImageNet 16384
  !curl -L -o vqgan_imagenet_f16_16384.ckpt -C - 'https://heibox.uni-heidelberg.de/d/a7530b09fed84f80a887/files/?p=%2Fckpts%2Flast.ckpt&dl=1' #ImageNet 16384
if gumbel_8192:
  !curl -L -o gumbel_8192.yaml -C - 'https://heibox.uni-heidelberg.de/d/2e5662443a6b4307b470/files/?p=%2Fconfigs%2Fmodel.yaml&dl=1' #Gumbel 8192
  !curl -L -o gumbel_8192.ckpt -C - 'https://heibox.uni-heidelberg.de/d/2e5662443a6b4307b470/files/?p=%2Fckpts%2Flast.ckpt&dl=1' #Gumbel 8192
if coco:
  !curl -L -o coco.yaml -C - 'https://dl.nmkd.de/ai/clip/coco/coco.yaml' #COCO
  !curl -L -o coco.ckpt -C - 'https://dl.nmkd.de/ai/clip/coco/coco.ckpt' #COCO
if faceshq:
  !curl -L -o faceshq.yaml -C - 'https://drive.google.com/uc?export=download&id=1fHwGx_hnBtC8nsq7hesJvs-Klv-P0gzT' #FacesHQ
  !curl -L -o faceshq.ckpt -C - 'https://app.koofr.net/content/links/a04deec9-0c59-4673-8b37-3d696fe63a5d/files/get/last.ckpt?path=%2F2020-11-13T21-41-45_faceshq_transformer%2Fcheckpoints%2Flast.ckpt' #FacesHQ
if wikiart_1024: 
  !curl -L -o wikiart_1024.yaml -C - 'http://mirror.io.community/blob/vqgan/wikiart.yaml' #WikiArt 1024
  !curl -L -o wikiart_1024.ckpt -C - 'http://mirror.io.community/blob/vqgan/wikiart.ckpt' #WikiArt 1024
if wikiart_16384: 
  !curl -L -o wikiart_16384.yaml -C - 'http://eaidata.bmk.sh/data/Wikiart_16384/wikiart_f16_16384_8145600.yaml' #WikiArt 16384
  !curl -L -o wikiart_16384.ckpt -C - 'http://eaidata.bmk.sh/data/Wikiart_16384/wikiart_f16_16384_8145600.ckpt' #WikiArt 16384
if sflckr:
  !curl -L -o sflckr.yaml -C - 'https://heibox.uni-heidelberg.de/d/73487ab6e5314cb5adba/files/?p=%2Fconfigs%2F2020-11-09T13-31-51-project.yaml&dl=1' #S-FLCKR
  !curl -L -o sflckr.ckpt -C - 'https://heibox.uni-heidelberg.de/d/73487ab6e5314cb5adba/files/?p=%2Fcheckpoints%2Flast.ckpt&dl=1' #S-FLCKR
if ade20k:
  !curl -L -o ade20k.yaml -C - 'https://static.miraheze.org/intercriaturaswiki/b/bf/Ade20k.txt' #ADE20K
  !curl -L -o ade20k.ckpt -C - 'https://app.koofr.net/content/links/0f65c2cd-7102-4550-a2bd-07fd383aac9e/files/get/last.ckpt?path=%2F2020-11-20T21-45-44_ade20k_transformer%2Fcheckpoints%2Flast.ckpt' #ADE20K
if ffhq:
  !curl -L -o ffhq.yaml -C - 'https://app.koofr.net/content/links/0fc005bf-3dca-4079-9d40-cdf38d42cd7a/files/get/2021-04-23T18-19-01-project.yaml?path=%2F2021-04-23T18-19-01_ffhq_transformer%2Fconfigs%2F2021-04-23T18-19-01-project.yaml&force' #FFHQ
  !curl -L -o ffhq.ckpt -C - 'https://app.koofr.net/content/links/0fc005bf-3dca-4079-9d40-cdf38d42cd7a/files/get/last.ckpt?path=%2F2021-04-23T18-19-01_ffhq_transformer%2Fcheckpoints%2Flast.ckpt&force' #FFHQ
if celebahq:
  !curl -L -o celebahq.yaml -C - 'https://app.koofr.net/content/links/6dddf083-40c8-470a-9360-a9dab2a94e96/files/get/2021-04-23T18-11-19-project.yaml?path=%2F2021-04-23T18-11-19_celebahq_transformer%2Fconfigs%2F2021-04-23T18-11-19-project.yaml&force' #CelebA-HQ
  !curl -L -o celebahq.ckpt -C - 'https://app.koofr.net/content/links/6dddf083-40c8-470a-9360-a9dab2a94e96/files/get/last.ckpt?path=%2F2021-04-23T18-11-19_celebahq_transformer%2Fcheckpoints%2Flast.ckpt&force' #CelebA-HQ

# @title Carga de bibliotecas y definiciones
 
import argparse
import math
from pathlib import Path
import sys
 
sys.path.append('./taming-transformers')
from IPython import display
from base64 import b64encode
from omegaconf import OmegaConf
from PIL import Image
from taming.models import cond_transformer, vqgan
import torch
from torch import nn, optim
from torch.nn import functional as F
from torchvision import transforms
from torchvision.transforms import functional as TF
from tqdm.notebook import tqdm
 
from CLIP import clip
import kornia.augmentation as K
import numpy as np
import imageio
from PIL import ImageFile, Image
from imgtag import ImgTag    # metadatos 
from libxmp import *         # metadatos
import libxmp                # metadatos
from stegano import lsb
import json
ImageFile.LOAD_TRUNCATED_IMAGES = True
 
def sinc(x):
    return torch.where(x != 0, torch.sin(math.pi * x) / (math.pi * x), x.new_ones([]))
 
 
def lanczos(x, a):
    cond = torch.logical_and(-a < x, x < a)
    out = torch.where(cond, sinc(x) * sinc(x/a), x.new_zeros([]))
    return out / out.sum()
 
 
def ramp(ratio, width):
    n = math.ceil(width / ratio + 1)
    out = torch.empty([n])
    cur = 0
    for i in range(out.shape[0]):
        out[i] = cur
        cur += ratio
    return torch.cat([-out[1:].flip([0]), out])[1:-1]
 
 
def resample(input, size, align_corners=True):
    n, c, h, w = input.shape
    dh, dw = size
 
    input = input.view([n * c, 1, h, w])
 
    if dh < h:
        kernel_h = lanczos(ramp(dh / h, 2), 2).to(input.device, input.dtype)
        pad_h = (kernel_h.shape[0] - 1) // 2
        input = F.pad(input, (0, 0, pad_h, pad_h), 'reflect')
        input = F.conv2d(input, kernel_h[None, None, :, None])
 
    if dw < w:
        kernel_w = lanczos(ramp(dw / w, 2), 2).to(input.device, input.dtype)
        pad_w = (kernel_w.shape[0] - 1) // 2
        input = F.pad(input, (pad_w, pad_w, 0, 0), 'reflect')
        input = F.conv2d(input, kernel_w[None, None, None, :])
 
    input = input.view([n, c, h, w])
    return F.interpolate(input, size, mode='bicubic', align_corners=align_corners)
 
 
class ReplaceGrad(torch.autograd.Function):
    @staticmethod
    def forward(ctx, x_forward, x_backward):
        ctx.shape = x_backward.shape
        return x_forward
 
    @staticmethod
    def backward(ctx, grad_in):
        return None, grad_in.sum_to_size(ctx.shape)
 
 
replace_grad = ReplaceGrad.apply
 
 
class ClampWithGrad(torch.autograd.Function):
    @staticmethod
    def forward(ctx, input, min, max):
        ctx.min = min
        ctx.max = max
        ctx.save_for_backward(input)
        return input.clamp(min, max)
 
    @staticmethod
    def backward(ctx, grad_in):
        input, = ctx.saved_tensors
        return grad_in * (grad_in * (input - input.clamp(ctx.min, ctx.max)) >= 0), None, None
 
 
clamp_with_grad = ClampWithGrad.apply
 
 
def vector_quantize(x, codebook):
    d = x.pow(2).sum(dim=-1, keepdim=True) + codebook.pow(2).sum(dim=1) - 2 * x @ codebook.T
    indices = d.argmin(-1)
    x_q = F.one_hot(indices, codebook.shape[0]).to(d.dtype) @ codebook
    return replace_grad(x_q, x)
 
 
class Prompt(nn.Module):
    def __init__(self, embed, weight=1., stop=float('-inf')):
        super().__init__()
        self.register_buffer('embed', embed)
        self.register_buffer('weight', torch.as_tensor(weight))
        self.register_buffer('stop', torch.as_tensor(stop))
 
    def forward(self, input):
        input_normed = F.normalize(input.unsqueeze(1), dim=2)
        embed_normed = F.normalize(self.embed.unsqueeze(0), dim=2)
        dists = input_normed.sub(embed_normed).norm(dim=2).div(2).arcsin().pow(2).mul(2)
        dists = dists * self.weight.sign()
        return self.weight.abs() * replace_grad(dists, torch.maximum(dists, self.stop)).mean()
 
 
def parse_prompt(prompt):
    vals = prompt.rsplit(':', 2)
    vals = vals + ['', '1', '-inf'][len(vals):]
    return vals[0], float(vals[1]), float(vals[2])
 
 
class MakeCutouts(nn.Module):
    def __init__(self, cut_size, cutn, cut_pow=1.):
        super().__init__()
        self.cut_size = cut_size
        self.cutn = cutn
        self.cut_pow = cut_pow
        self.augs = nn.Sequential(
            K.RandomHorizontalFlip(p=0.5),
            # K.RandomSolarize(0.01, 0.01, p=0.7),
            K.RandomSharpness(0.3,p=0.4),
            K.RandomAffine(degrees=30, translate=0.1, p=0.8, padding_mode='border'),
            K.RandomPerspective(0.2,p=0.4),
            K.ColorJitter(hue=0.01, saturation=0.01, p=0.7))
        self.noise_fac = 0.1
 
 
    def forward(self, input):
        sideY, sideX = input.shape[2:4]
        max_size = min(sideX, sideY)
        min_size = min(sideX, sideY, self.cut_size)
        cutouts = []
        for _ in range(self.cutn):
            size = int(torch.rand([])**self.cut_pow * (max_size - min_size) + min_size)
            offsetx = torch.randint(0, sideX - size + 1, ())
            offsety = torch.randint(0, sideY - size + 1, ())
            cutout = input[:, :, offsety:offsety + size, offsetx:offsetx + size]
            cutouts.append(resample(cutout, (self.cut_size, self.cut_size)))
        batch = self.augs(torch.cat(cutouts, dim=0))
        if self.noise_fac:
            facs = batch.new_empty([self.cutn, 1, 1, 1]).uniform_(0, self.noise_fac)
            batch = batch + facs * torch.randn_like(batch)
        return batch
 
 
def load_vqgan_model(config_path, checkpoint_path):
    config = OmegaConf.load(config_path)
    if config.model.target == 'taming.models.vqgan.VQModel':
        model = vqgan.VQModel(**config.model.params)
        model.eval().requires_grad_(False)
        model.init_from_ckpt(checkpoint_path)
    elif config.model.target == 'taming.models.cond_transformer.Net2NetTransformer':
        parent_model = cond_transformer.Net2NetTransformer(**config.model.params)
        parent_model.eval().requires_grad_(False)
        parent_model.init_from_ckpt(checkpoint_path)
        model = parent_model.first_stage_model
    elif config.model.target == 'taming.models.vqgan.GumbelVQ':
        model = vqgan.GumbelVQ(**config.model.params)
        print(config.model.params)
        model.eval().requires_grad_(False)
        model.init_from_ckpt(checkpoint_path)
    else:
        raise ValueError(f'unknown model type: {config.model.target}')
    del model.loss
    return model
 
 
def resize_image(image, out_size):
    ratio = image.size[0] / image.size[1]
    area = min(image.size[0] * image.size[1], out_size[0] * out_size[1])
    size = round((area * ratio)**0.5), round((area / ratio)**0.5)
    return image.resize(size, Image.LANCZOS)

def download_img(img_url):
    try:
        return wget.download(img_url,out="input.jpg")
    except:
        return

"""## Herramientas para la ejecución:
Principalmente lo que tendrás que modificar será `textos:`, ahí puedes colocar el o los textos que  quieres generar (separados con `|` ). Es una lista porque puedes poner más de un texto, y así la IA trate de 'mezclar' las imágenes, dándole la misma prioridad a ambos textos.

Para usar una imagen inicial al modelo, solo debes subir un archivo al entorno del Colab (en la sección a la izquierda), y luego modificas `imagen_inicial:` poniendo el nombre exacto del archivo. Ejemplo: `sample.png`

También puedes modificar el modelo cambiando las línea que dice `modelo:`. Actualmente están disponibles 1024, 16384, WikiArt, S-FLCKR y COCO-Stuff. Para activarlos tienes que haberlos descargado primero, y luego puedes simplemente seleccionarlo.

También puedes usar `imagenes_objetivo`, que es básicamente ponerle una o más imágenes que la IA tomará como "meta", cumpliendo la misma función que ponerle un texto. Para poner más de una tienes que usar `|` como separador.
"""

#@title Parámetros
textos = "a fantasy world" #@param {type:"string"}
ancho =  480#@param {type:"number"}
alto =  480#@param {type:"number"}
modelo = "vqgan_imagenet_f16_16384" #@param ["vqgan_imagenet_f16_16384", "vqgan_imagenet_f16_1024", "wikiart_1024", "wikiart_16384", "coco", "faceshq", "sflckr", "ade20k", "ffhq", "celebahq", "gumbel_8192"]
intervalo_imagenes =  50#@param {type:"number"}
imagen_inicial = None#@param {type:"string"}
imagenes_objetivo = None#@param {type:"string"}
seed = -1#@param {type:"number"}
max_iteraciones = -1#@param {type:"number"}
input_images = ""

nombres_modelos={"vqgan_imagenet_f16_16384": 'ImageNet 16384',"vqgan_imagenet_f16_1024":"ImageNet 1024", 
                 "wikiart_1024":"WikiArt 1024", "wikiart_16384":"WikiArt 16384", "coco":"COCO-Stuff", "faceshq":"FacesHQ", "sflckr":"S-FLCKR", "ade20k":"ADE20K", "ffhq":"FFHQ", "celebahq":"CelebA-HQ", "gumbel_8192": "Gumbel 8192"}
nombre_modelo = nombres_modelos[modelo]     

if modelo == "gumbel_8192":
    is_gumbel = True
else:
    is_gumbel = False

if seed == -1:
    seed = None
if imagen_inicial == "None":
    imagen_inicial = None
elif imagen_inicial and imagen_inicial.lower().startswith("http"):
    imagen_inicial = download_img(imagen_inicial)


if imagenes_objetivo == "None" or not imagenes_objetivo:
    imagenes_objetivo = []
else:
    imagenes_objetivo = imagenes_objetivo.split("|")
    imagenes_objetivo = [image.strip() for image in imagenes_objetivo]

if imagen_inicial or imagenes_objetivo != []:
    input_images = True

textos = [frase.strip() for frase in textos.split("|")]
if textos == ['']:
    textos = []


args = argparse.Namespace(
    prompts=textos,
    image_prompts=imagenes_objetivo,
    noise_prompt_seeds=[],
    noise_prompt_weights=[],
    size=[ancho, alto],
    init_image=imagen_inicial,
    init_weight=0.,
    clip_model='ViT-B/32',
    vqgan_config=f'{modelo}.yaml',
    vqgan_checkpoint=f'{modelo}.ckpt',
    step_size=0.1,
    cutn=64,
    cut_pow=1.,
    display_freq=intervalo_imagenes,
    seed=seed,
)

#@title Hacer la ejecución...
device = torch.device('cuda:0' if torch.cuda.is_available() else 'cpu')
print('Using device:', device)
if textos:
    print('Using texts:', textos)
if imagenes_objetivo:
    print('Using image prompts:', imagenes_objetivo)
if args.seed is None:
    seed = torch.seed()
else:
    seed = args.seed
torch.manual_seed(seed)
print('Using seed:', seed)

model = load_vqgan_model(args.vqgan_config, args.vqgan_checkpoint).to(device)
perceptor = clip.load(args.clip_model, jit=False)[0].eval().requires_grad_(False).to(device)

cut_size = perceptor.visual.input_resolution
if is_gumbel:
    e_dim = model.quantize.embedding_dim
else:
    e_dim = model.quantize.e_dim

f = 2**(model.decoder.num_resolutions - 1)
make_cutouts = MakeCutouts(cut_size, args.cutn, cut_pow=args.cut_pow)
if is_gumbel:
    n_toks = model.quantize.n_embed
else:
    n_toks = model.quantize.n_e

toksX, toksY = args.size[0] // f, args.size[1] // f
sideX, sideY = toksX * f, toksY * f
if is_gumbel:
    z_min = model.quantize.embed.weight.min(dim=0).values[None, :, None, None]
    z_max = model.quantize.embed.weight.max(dim=0).values[None, :, None, None]
else:
    z_min = model.quantize.embedding.weight.min(dim=0).values[None, :, None, None]
    z_max = model.quantize.embedding.weight.max(dim=0).values[None, :, None, None]

if args.init_image:
    pil_image = Image.open(args.init_image).convert('RGB')
    pil_image = pil_image.resize((sideX, sideY), Image.LANCZOS)
    z, *_ = model.encode(TF.to_tensor(pil_image).to(device).unsqueeze(0) * 2 - 1)
else:
    one_hot = F.one_hot(torch.randint(n_toks, [toksY * toksX], device=device), n_toks).float()
    if is_gumbel:
        z = one_hot @ model.quantize.embed.weight
    else:
        z = one_hot @ model.quantize.embedding.weight
    z = z.view([-1, toksY, toksX, e_dim]).permute(0, 3, 1, 2)
z_orig = z.clone()
z.requires_grad_(True)
opt = optim.Adam([z], lr=args.step_size)

normalize = transforms.Normalize(mean=[0.48145466, 0.4578275, 0.40821073],
                                 std=[0.26862954, 0.26130258, 0.27577711])

pMs = []

for prompt in args.prompts:
    txt, weight, stop = parse_prompt(prompt)
    embed = perceptor.encode_text(clip.tokenize(txt).to(device)).float()
    pMs.append(Prompt(embed, weight, stop).to(device))

for prompt in args.image_prompts:
    path, weight, stop = parse_prompt(prompt)
    img = resize_image(Image.open(path).convert('RGB'), (sideX, sideY))
    batch = make_cutouts(TF.to_tensor(img).unsqueeze(0).to(device))
    embed = perceptor.encode_image(normalize(batch)).float()
    pMs.append(Prompt(embed, weight, stop).to(device))

for seed, weight in zip(args.noise_prompt_seeds, args.noise_prompt_weights):
    gen = torch.Generator().manual_seed(seed)
    embed = torch.empty([1, perceptor.visual.output_dim]).normal_(generator=gen)
    pMs.append(Prompt(embed, weight).to(device))

def synth(z):
    if is_gumbel:
        z_q = vector_quantize(z.movedim(1, 3), model.quantize.embed.weight).movedim(3, 1)
    else:
        z_q = vector_quantize(z.movedim(1, 3), model.quantize.embedding.weight).movedim(3, 1)
    
    return clamp_with_grad(model.decode(z_q).add(1).div(2), 0, 1)

def add_xmp_data(nombrefichero):
    imagen = ImgTag(filename=nombrefichero)
    imagen.xmp.append_array_item(libxmp.consts.XMP_NS_DC, 'creator', 'VQGAN+CLIP', {"prop_array_is_ordered":True, "prop_value_is_array":True})
    if args.prompts:
        imagen.xmp.append_array_item(libxmp.consts.XMP_NS_DC, 'title', " | ".join(args.prompts), {"prop_array_is_ordered":True, "prop_value_is_array":True})
    else:
        imagen.xmp.append_array_item(libxmp.consts.XMP_NS_DC, 'title', 'None', {"prop_array_is_ordered":True, "prop_value_is_array":True})
    imagen.xmp.append_array_item(libxmp.consts.XMP_NS_DC, 'i', str(i), {"prop_array_is_ordered":True, "prop_value_is_array":True})
    imagen.xmp.append_array_item(libxmp.consts.XMP_NS_DC, 'model', nombre_modelo, {"prop_array_is_ordered":True, "prop_value_is_array":True})
    imagen.xmp.append_array_item(libxmp.consts.XMP_NS_DC, 'seed',str(seed) , {"prop_array_is_ordered":True, "prop_value_is_array":True})
    imagen.xmp.append_array_item(libxmp.consts.XMP_NS_DC, 'input_images',str(input_images) , {"prop_array_is_ordered":True, "prop_value_is_array":True})
    #for frases in args.prompts:
    #    imagen.xmp.append_array_item(libxmp.consts.XMP_NS_DC, 'Prompt' ,frases, {"prop_array_is_ordered":True, "prop_value_is_array":True})
    imagen.close()

def add_stegano_data(filename):
    data = {
        "title": " | ".join(args.prompts) if args.prompts else None,
        "notebook": "VQGAN+CLIP",
        "i": i,
        "model": nombre_modelo,
        "seed": str(seed),
        "input_images": input_images
    }
    lsb.hide(filename, json.dumps(data)).save(filename)

@torch.no_grad()
def checkin(i, losses):
    losses_str = ', '.join(f'{loss.item():g}' for loss in losses)
    tqdm.write(f'i: {i}, loss: {sum(losses).item():g}, losses: {losses_str}')
    out = synth(z)
    TF.to_pil_image(out[0].cpu()).save('progress.png')
    add_stegano_data('progress.png')
    add_xmp_data('progress.png')
    display.display(display.Image('progress.png'))

def ascend_txt():
    global i
    out = synth(z)
    iii = perceptor.encode_image(normalize(make_cutouts(out))).float()

    result = []

    if args.init_weight:
        result.append(F.mse_loss(z, z_orig) * args.init_weight / 2)

    for prompt in pMs:
        result.append(prompt(iii))
    img = np.array(out.mul(255).clamp(0, 255)[0].cpu().detach().numpy().astype(np.uint8))[:,:,:]
    img = np.transpose(img, (1, 2, 0))
    filename = f"steps/{i:04}.png"
    imageio.imwrite(filename, np.array(img))
    add_stegano_data(filename)
    add_xmp_data(filename)
    return result

def train(i):
    opt.zero_grad()
    lossAll = ascend_txt()
    if i % args.display_freq == 0:
        checkin(i, lossAll)
    loss = sum(lossAll)
    loss.backward()
    opt.step()
    with torch.no_grad():
        z.copy_(z.maximum(z_min).minimum(z_max))

i = 0
try:
    with tqdm() as pbar:
        while True:
            train(i)
            if i == max_iteraciones:
                break
            i += 1
            pbar.update()
except KeyboardInterrupt:
    pass

"""## Genera un vídeo con los resultados

Si quieres generar un vídeo con los frames, solo haz click abajo. Puedes modificar el número de FPS, el frame inicial, el último frame, etc.
"""

init_frame = 1 #Este es el frame donde el vídeo empezará
last_frame = i #Puedes cambiar i a el número del último frame que quieres generar. It will raise an error if that number of frames does not exist.

min_fps = 10
max_fps = 30

total_frames = last_frame-init_frame

length = 15 #Tiempo deseado del vídeo en segundos

frames = []
tqdm.write('Generando video...')
for i in range(init_frame,last_frame): #
    filename = f"steps/{i:04}.png"
    frames.append(Image.open(filename))

#fps = last_frame/10
fps = np.clip(total_frames/length,min_fps,max_fps)

from subprocess import Popen, PIPE
p = Popen(['ffmpeg', '-y', '-f', 'image2pipe', '-vcodec', 'png', '-r', str(fps), '-i', '-', '-vcodec', 'libx264', '-r', str(fps), '-pix_fmt', 'yuv420p', '-crf', '17', '-preset', 'veryslow', 'video.mp4'], stdin=PIPE)
for im in tqdm(frames):
    im.save(p.stdin, 'PNG')
p.stdin.close()

print("El vídeo está siendo ahora comprimido, espera...")
p.wait()
print("El vídeo está listo")

# @title Ver vídeo en el navegador
# @markdown Este proceso puede tardar un poco más. Si no quieres esperar, descárgalo ejecutando la celda siguiente en vez de usar esta celda.
mp4 = open('video.mp4','rb').read()
data_url = "data:video/mp4;base64," + b64encode(mp4).decode()
display.HTML("""
<video width=400 controls>
      <source src="%s" type="video/mp4">
</video>
""" % data_url)

# @title Descargar vídeo
from google.colab import files
files.download("video.mp4")
</python>