movie import fix

.gitignore

@@ -7,7 +7,6 @@ __pycache__/
 *.so
 
 # Distribution / packaging
-*.json
 .Python
 build/
 develop-eggs/

Dockerfile

@@ -1,51 +0,0 @@
-FROM nvidia/cuda:12.1.1-cudnn8-devel-ubuntu22.04
-
-# Configure environment
-ENV DEBIAN_FRONTEND=noninteractive \
-    PIP_PREFER_BINARY=1 \
-    CUDA_HOME=/usr/local/cuda-12.1 \
-    TORCH_CUDA_ARCH_LIST="8.6"
-
-# Redirect shell
-RUN rm /bin/sh && ln -s /bin/bash /bin/sh
-
-# Install prereqs
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    curl \
-    git-lfs \
-    ffmpeg \ 
-    libgl1-mesa-dev \
-    libglib2.0-0 \
-    git \
-    python3-dev \
-    python3-pip \
-    # Lunar Tools prereqs
-    libasound2-dev \
-    libportaudio2 \
-    && apt clean && rm -rf /var/lib/apt/lists/* \
-    && ln -s /usr/bin/python3 /usr/bin/python
-
-# Set symbolic links
-RUN echo "export PATH=/usr/local/cuda/bin:$PATH" >> /etc/bash.bashrc \
-    && echo "export LD_LIBRARY_PATH=/usr/local/cuda/lib64:$LD_LIBRARY_PATH" >> /etc/bash. bashrc \
-    && echo "export CUDA_HOME=/usr/local/cuda-12.1" >> /etc/bash.bashrc
-
-# Install Python packages: Basic, then CUDA-compatible, then custom
-RUN pip3 install \
-    wheel \
-    ninja && \
-    pip3 install \
-    torch==2.1.0 \
-    torchvision==0.16.0 \
-    xformers>=0.0.22 \
-    triton>=2.1.0 \
-    --index-url https://download.pytorch.org/whl/cu121 && \
-    pip3 install git+https://github.com/lunarring/latentblending \
-    git+https://github.com/chengzeyi/stable-fast.git@main#egg=stable-fast
-
-# Optionally store weights in image
-# RUN mkdir -p /root/.cache/torch/hub/checkpoints/ && curl -o /root/.cache/torch/hub/checkpoints//alexnet-owt-7be5be79.pth https://download.pytorch.org/models/alexnet-owt-7be5be79.pth
-# RUN git lfs install && git clone https://huggingface.co/stabilityai/sdxl-turbo /sdxl-turbo
-
-# Clone base repo because why not
-RUN git clone https://github.com/lunarring/latentblending.git

README.md

@@ -35,16 +35,11 @@ be = BlendingEngine(pipe, do_compile=True)
 ```
 
 ## Gradio UI
-We can launch the a user-interface version with:
+Coming soon again :)
-```commandline
-python latentblending/gradio_ui.py
-```
-
-With the UI, you can iteratively generate your desired keyframes, and then render the movie with latent blending it at the end.
 
 ## Example 1: Simple transition
 ![](example1.jpg)
-To run a simple transition between two prompts, see `examples/single_trans.py`, or [check this volcano eruption ](https://youtu.be/O_2fpWHdnm4).
+To run a simple transition between two prompts, see `examples/single_trans.py`
 
 ## Example 2: Multi transition
 To run multiple transition between K prompts, resulting in a stitched video, see `examples/multi_trans.py`.
@@ -140,6 +135,7 @@ With latent blending, we can create transitions that appear to defy the laws of
 
 # Coming soon...
 - [ ] MacOS support
+- [ ] Gradio interface
 - [ ] Huggingface Space
 - [ ] Controlnet
 - [ ] IP-Adapter

example_multi_trans_json.py

@@ -1,75 +0,0 @@
-import torch
-import warnings
-from diffusers import AutoPipelineForText2Image
-from latentblending.blending_engine import BlendingEngine
-from lunar_tools import concatenate_movies
-import numpy as np
-torch.set_grad_enabled(False)
-torch.backends.cudnn.benchmark = False
-warnings.filterwarnings('ignore')
-
-import json
-# %% First let us spawn a stable diffusion holder. Uncomment your version of choice.
-# pretrained_model_name_or_path = "stabilityai/stable-diffusion-xl-base-1.0"
-pretrained_model_name_or_path = "stabilityai/sdxl-turbo"
-
-pipe = AutoPipelineForText2Image.from_pretrained(pretrained_model_name_or_path, torch_dtype=torch.float16, variant="fp16")
-pipe.to('cuda')
-be = BlendingEngine(pipe, do_compile=False)
-
-fp_movie = f'test.mp4'
-fp_json = "movie_240221_1520.json"
-duration_single_trans = 10
-
-# Load the JSON data from the file
-with open(fp_json, 'r') as file:
-    data = json.load(file)
-
-# Set up width, height, num_inference steps
-width = data[0]["width"]
-height = data[0]["height"]
-num_inference_steps = data[0]["num_inference_steps"]
-
-be.set_dimensions((width, height))
-be.set_num_inference_steps(num_inference_steps)
-
-# Initialize lists for prompts, negative prompts, and seeds
-list_prompts = []
-list_negative_prompts = []
-list_seeds = []
-
-# Extract prompts, negative prompts, and seeds from the data
-for item in data[1:]:  # Skip the first item as it contains settings
-    list_prompts.append(item["prompt"])
-    list_negative_prompts.append(item["negative_prompt"])
-    list_seeds.append(item["seed"])
-
-
-list_movie_parts = []
-for i in range(len(list_prompts) - 1):
-    # For a multi transition we can save some computation time and recycle the latents
-    if i == 0:
-        be.set_prompt1(list_prompts[i])
-        be.set_negative_prompt(list_negative_prompts[i])
-        be.set_prompt2(list_prompts[i + 1])
-        recycle_img1 = False
-    else:
-        be.swap_forward()
-        be.set_negative_prompt(list_negative_prompts[i+1])
-        be.set_prompt2(list_prompts[i + 1])
-        recycle_img1 = True
-
-    fp_movie_part = f"tmp_part_{str(i).zfill(3)}.mp4"
-    fixed_seeds = list_seeds[i:i + 2]
-    # Run latent blending
-    be.run_transition(
-        recycle_img1=recycle_img1,
-        fixed_seeds=fixed_seeds)
-
-    # Save movie
-    be.write_movie_transition(fp_movie_part, duration_single_trans)
-    list_movie_parts.append(fp_movie_part)
-
-# Finally, concatente the result
-concatenate_movies(fp_movie, list_movie_parts)
-print(f"DONE! MOVIE SAVED IN {fp_movie}")

examples/multi_trans.py

@@ -1,7 +1,7 @@
 import torch
 import warnings
 from diffusers import AutoPipelineForText2Image
-from lunar_tools import concatenate_movies
+from latentblending.movie_util import concatenate_movies
 from latentblending.blending_engine import BlendingEngine
 import numpy as np
 torch.set_grad_enabled(False)
@@ -23,6 +23,9 @@ be.set_dimensions((1024, 1024))
 nmb_prompts = 20
 
 
+
+
+
 # Specify a list of prompts below
 #%%
 

latentblending/__init__.py

@@ -1,3 +1,4 @@
 from .blending_engine import BlendingEngine
 from .diffusers_holder import DiffusersHolder
+from .movie_util import MovieSaver
 from .utils import interpolate_spherical, add_frames_linear_interp, interpolate_linear, get_spacing, get_time, yml_load, yml_save

latentblending/blending_engine.py

@@ -288,7 +288,7 @@ class BlendingEngine():
             if t_compute_max_allowed is None and nmb_max_branches is None:
                 t_compute_max_allowed = 20
             elif t_compute_max_allowed is not None and nmb_max_branches is not None:
-                raise ValueErorr("Either specify t_compute_max_allowed or nmb_max_branches")
+                raise ValueError("Either specify t_compute_max_allowed or nmb_max_branches")
             
             self.list_idx_injection, self.list_nmb_stems = self.get_time_based_branching(depth_strength, t_compute_max_allowed, nmb_max_branches)    
 
@@ -680,6 +680,7 @@ class BlendingEngine():
             img_leaf = Image.fromarray(img)
             img_leaf.save(os.path.join(dp_img, f"lowres_img_{str(i).zfill(4)}.jpg"))
         fp_yml = os.path.join(dp_img, "lowres.yaml")
+        self.save_statedict(fp_yml)
 
     def write_movie_transition(self, fp_movie, duration_transition, fps=30):
         r"""
@@ -727,6 +728,35 @@ class BlendingEngine():
                         pass
         return state_dict
 
+    def randomize_seed(self):
+        r"""
+        Set a random seed for a fresh start.
+        """
+        seed = np.random.randint(999999999)
+        self.set_seed(seed)
+
+    def set_seed(self, seed: int):
+        r"""
+        Set a the seed for a fresh start.
+        """
+        self.seed = seed
+        self.dh.seed = seed
+
+    def set_width(self, width):
+        r"""
+        Set the width of the resulting image.
+        """
+        assert np.mod(width, 64) == 0, "set_width: value needs to be divisible by 64"
+        self.width = width
+        self.dh.width = width
+
+    def set_height(self, height):
+        r"""
+        Set the height of the resulting image.
+        """
+        assert np.mod(height, 64) == 0, "set_height: value needs to be divisible by 64"
+        self.height = height
+        self.dh.height = height
 
     def swap_forward(self):
         r"""

latentblending/gradio_ui.py

@@ -1,3 +1,18 @@
+# Copyright 2022 Lunar Ring. All rights reserved.
+# Written by Johannes Stelzer, email stelzer@lunar-ring.ai twitter @j_stelzer
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 import os
 import torch
 torch.backends.cudnn.benchmark = False
@@ -5,340 +20,481 @@ torch.set_grad_enabled(False)
 import numpy as np
 import warnings
 warnings.filterwarnings('ignore')
+import warnings
 from tqdm.auto import tqdm
 from PIL import Image
+from movie_util import MovieSaver, concatenate_movies
+from latent_blending import LatentBlending
+from stable_diffusion_holder import StableDiffusionHolder
 import gradio as gr
+from dotenv import find_dotenv, load_dotenv
 import shutil
 import uuid
-from diffusers import AutoPipelineForText2Image
+from utils import get_time, add_frames_linear_interp
-from latentblending.blending_engine import BlendingEngine
+from huggingface_hub import hf_hub_download
-import datetime
-import tempfile
-import json
-from lunar_tools import concatenate_movies
-import argparse
 
-"""
-TODO
-- time per segment
-- init phase (model, res, nmb iter)
-- recycle existing movies
-- hf spaces integration
-"""
 
-class MultiUserRouter():
+class BlendingFrontend():
     def __init__(
             self,
-            do_compile=False
+            sdh,
-        ):
+            share=False):
-        self.user_blendingvariableholder = {}
-        self.do_compile = do_compile
-        self.list_models = ["stabilityai/sdxl-turbo", "stabilityai/stable-diffusion-xl-base-1.0"]
-
-        self.init_models()
-
-    def init_models(self):
-        self.dict_blendingengines = {}
-        for m in self.list_models:
-            pipe = AutoPipelineForText2Image.from_pretrained(m, torch_dtype=torch.float16, variant="fp16")
-            pipe.to("cuda")
-            be = BlendingEngine(pipe, do_compile=self.do_compile)
-            
-            self.dict_blendingengines[m] = be
-
-    def register_new_user(self, model, width, height):
-        user_id = str(uuid.uuid4().hex.upper()[0:8])
-        be = self.dict_blendingengines[model]
-        be.set_dimensions((width, height))
-        self.user_blendingvariableholder[user_id] = BlendingVariableHolder(be)
-        return user_id
-
-    def user_overflow_protection(self):
-        pass
-
-    def preview_img_selected(self, user_id, data: gr.SelectData, button):
-        return self.user_blendingvariableholder[user_id].preview_img_selected(data, button)
-
-    def movie_img_selected(self, user_id, data: gr.SelectData, button):
-        return self.user_blendingvariableholder[user_id].movie_img_selected(data, button)
-
-    def compute_imgs(self, user_id, prompt, negative_prompt):
-        return self.user_blendingvariableholder[user_id].compute_imgs(prompt, negative_prompt)
-    
-    def get_list_images_movie(self, user_id):
-        return self.user_blendingvariableholder[user_id].get_list_images_movie()
-    
-    def init_new_movie(self, user_id):
-        return self.user_blendingvariableholder[user_id].init_new_movie()
-    
-    def write_json(self, user_id):
-        return self.user_blendingvariableholder[user_id].write_json()
-    
-    def add_image_to_video(self, user_id):
-        return self.user_blendingvariableholder[user_id].add_image_to_video()
-    
-    def img_movie_delete(self, user_id):
-        return self.user_blendingvariableholder[user_id].img_movie_delete()
-    
-    def img_movie_later(self, user_id):
-        return self.user_blendingvariableholder[user_id].img_movie_later()
-    
-    def img_movie_earlier(self, user_id):
-        return self.user_blendingvariableholder[user_id].img_movie_earlier()
-    
-    def generate_movie(self, user_id, t_per_segment):
-        return self.user_blendingvariableholder[user_id].generate_movie(t_per_segment)
-
-#%% BlendingVariableHolder Class
-class BlendingVariableHolder():
-    def __init__(
-            self,
-            be):
         r"""
         Gradio Helper Class to collect UI data and start latent blending.
         Args:
-            be:
+            sdh:
-                Blendingengine
+                StableDiffusionHolder
             share: bool
                 Set true to get a shareable gradio link (e.g. for running a remote server)
         """
-        self.be = be
+        self.share = share
 
         # UI Defaults
+        self.num_inference_steps = 30
+        self.depth_strength = 0.25
         self.seed1 = 420
         self.seed2 = 420
         self.prompt1 = ""
         self.prompt2 = ""
         self.negative_prompt = ""
-        self.nmb_preview_images = 4
+        self.fps = 30
+        self.duration_video = 8
+        self.t_compute_max_allowed = 10
+
+        self.lb = LatentBlending(sdh)
+        self.lb.sdh.num_inference_steps = self.num_inference_steps
+        self.init_parameters_from_lb()
+        self.init_save_dir()
 
         # Vars
-        self.prompt = None
+        self.list_fp_imgs_current = []
-        self.negative_prompt = None
+        self.recycle_img1 = False
-        self.list_seeds = []
+        self.recycle_img2 = False
-        self.idx_movie = 0
+        self.list_all_segments = []
-        self.list_seeds = []
+        self.dp_session = ""
-        self.list_images_preview = []
+        self.user_id = None
-        self.data = []
-        self.idx_img_preview_selected = None
-        self.idx_img_movie_selected = None
-        self.jpg_quality = 80 
-        self.fp_movie = ''
 
-    def preview_img_selected(self, data: gr.SelectData, button):
+    def init_parameters_from_lb(self):
-        self.idx_img_preview_selected = data.index
+        r"""
-        print(f"preview image {self.idx_img_preview_selected} selected, seed {self.list_seeds[self.idx_img_preview_selected]}")
+        Automatically init parameters from latentblending instance
+        """
+        self.height = self.lb.sdh.height
+        self.width = self.lb.sdh.width
+        self.guidance_scale = self.lb.guidance_scale
+        self.guidance_scale_mid_damper = self.lb.guidance_scale_mid_damper
+        self.mid_compression_scaler = self.lb.mid_compression_scaler
+        self.branch1_crossfeed_power = self.lb.branch1_crossfeed_power
+        self.branch1_crossfeed_range = self.lb.branch1_crossfeed_range
+        self.branch1_crossfeed_decay = self.lb.branch1_crossfeed_decay
+        self.parental_crossfeed_power = self.lb.parental_crossfeed_power
+        self.parental_crossfeed_range = self.lb.parental_crossfeed_range
+        self.parental_crossfeed_power_decay = self.lb.parental_crossfeed_power_decay
 
-    def movie_img_selected(self, data: gr.SelectData, button):
+    def init_save_dir(self):
-        self.idx_img_movie_selected = data.index
+        r"""
-        print(f"movie image {self.idx_img_movie_selected} selected")
+        Initializes the directory where stuff is being saved.
+        You can specify this directory in a ".env" file in your latentblending root, setting
+        DIR_OUT='/path/to/saving'
+        """
+        load_dotenv(find_dotenv(), verbose=False)
+        self.dp_out = os.getenv("DIR_OUT")
+        if self.dp_out is None:
+            self.dp_out = ""
+        self.dp_imgs = os.path.join(self.dp_out, "imgs")
+        os.makedirs(self.dp_imgs, exist_ok=True)
+        self.dp_movies = os.path.join(self.dp_out, "movies")
+        os.makedirs(self.dp_movies, exist_ok=True)
+        self.save_empty_image()
 
-    def compute_imgs(self, prompt, negative_prompt):
+    def save_empty_image(self):
-        self.prompt = prompt
+        r"""
-        self.negative_prompt = negative_prompt
+        Saves an empty/black dummy image.
-        self.be.set_prompt1(prompt)
+        """
-        self.be.set_prompt2(prompt)
+        self.fp_img_empty = os.path.join(self.dp_imgs, 'empty.jpg')
-        self.be.set_negative_prompt(negative_prompt)
+        Image.fromarray(np.zeros((self.height, self.width, 3), dtype=np.uint8)).save(self.fp_img_empty, quality=5)
-        self.list_seeds = []
-        self.list_images_preview = []
-        self.idx_img_preview_selected = None
-        for i in range(self.nmb_preview_images):
-            seed = np.random.randint(0, np.iinfo(np.int32).max)
-            self.be.seed1 = seed
-            self.list_seeds.append(seed)
-            img = self.be.compute_latents1(return_image=True)
-            fn_img_tmp = f"image_{uuid.uuid4()}.jpg"
-            temp_img_path = os.path.join(tempfile.gettempdir(), fn_img_tmp)
-            img.save(temp_img_path)
-            img.save(temp_img_path, quality=self.jpg_quality, optimize=True)
-            self.list_images_preview.append(temp_img_path)
-        return self.list_images_preview 
 
+    def randomize_seed1(self):
+        r"""
+        Randomizes the first seed
+        """
+        seed = np.random.randint(0, 10000000)
+        self.seed1 = int(seed)
+        print(f"randomize_seed1: new seed = {self.seed1}")
+        return seed
 
-    def get_list_images_movie(self):
+    def randomize_seed2(self):
-        return [entry["preview_image"] for entry in self.data]
+        r"""
+        Randomizes the second seed
+        """
+        seed = np.random.randint(0, 10000000)
+        self.seed2 = int(seed)
+        print(f"randomize_seed2: new seed = {self.seed2}")
+        return seed
 
+    def setup_lb(self, list_ui_vals):
+        r"""
+        Sets all parameters from the UI. Since gradio does not support to pass dictionaries,
+        we have to instead pass keys (list_ui_keys, global) and values (list_ui_vals)
+        """
+        # Collect latent blending variables
+        self.lb.set_width(list_ui_vals[list_ui_keys.index('width')])
+        self.lb.set_height(list_ui_vals[list_ui_keys.index('height')])
+        self.lb.set_prompt1(list_ui_vals[list_ui_keys.index('prompt1')])
+        self.lb.set_prompt2(list_ui_vals[list_ui_keys.index('prompt2')])
+        self.lb.set_negative_prompt(list_ui_vals[list_ui_keys.index('negative_prompt')])
+        self.lb.guidance_scale = list_ui_vals[list_ui_keys.index('guidance_scale')]
+        self.lb.guidance_scale_mid_damper = list_ui_vals[list_ui_keys.index('guidance_scale_mid_damper')]
+        self.t_compute_max_allowed = list_ui_vals[list_ui_keys.index('duration_compute')]
+        self.lb.num_inference_steps = list_ui_vals[list_ui_keys.index('num_inference_steps')]
+        self.lb.sdh.num_inference_steps = list_ui_vals[list_ui_keys.index('num_inference_steps')]
+        self.duration_video = list_ui_vals[list_ui_keys.index('duration_video')]
+        self.lb.seed1 = list_ui_vals[list_ui_keys.index('seed1')]
+        self.lb.seed2 = list_ui_vals[list_ui_keys.index('seed2')]
+        self.lb.branch1_crossfeed_power = list_ui_vals[list_ui_keys.index('branch1_crossfeed_power')]
+        self.lb.branch1_crossfeed_range = list_ui_vals[list_ui_keys.index('branch1_crossfeed_range')]
+        self.lb.branch1_crossfeed_decay = list_ui_vals[list_ui_keys.index('branch1_crossfeed_decay')]
+        self.lb.parental_crossfeed_power = list_ui_vals[list_ui_keys.index('parental_crossfeed_power')]
+        self.lb.parental_crossfeed_range = list_ui_vals[list_ui_keys.index('parental_crossfeed_range')]
+        self.lb.parental_crossfeed_power_decay = list_ui_vals[list_ui_keys.index('parental_crossfeed_power_decay')]
+        self.num_inference_steps = list_ui_vals[list_ui_keys.index('num_inference_steps')]
+        self.depth_strength = list_ui_vals[list_ui_keys.index('depth_strength')]
 
-    def init_new_movie(self):
+        if len(list_ui_vals[list_ui_keys.index('user_id')]) > 1:
-        current_time = datetime.datetime.now()
+            self.user_id = list_ui_vals[list_ui_keys.index('user_id')]
-        self.fp_movie = "movie_" + current_time.strftime("%y%m%d_%H%M") + ".mp4"
-        self.fp_json = "movie_" + current_time.strftime("%y%m%d_%H%M") + ".json"
-        
-
-    def write_json(self):
-        # Write the data list to a JSON file
-        data_copy = self.data.copy()
-        data_copy.insert(0, {"settings": "sdxl", "width": self.be.dh.width_img, "height": self.be.dh.height_img, "num_inference_steps": self.be.dh.num_inference_steps})
-        with open(self.fp_json, 'w') as f:
-            json.dump(data_copy, f, indent=4)
-
-    def add_image_to_video(self):
-        if self.prompt is None:
-            print("Cannot take because no prompt was set!")
-            return self.get_list_images_movie()
-        if self.idx_movie == 0:
-            self.init_new_movie()
-
-        self.data.append({"iteration": self.idx_movie, 
-        "seed": self.list_seeds[self.idx_img_preview_selected], 
-        "prompt": self.prompt, 
-        "negative_prompt": self.negative_prompt,
-        "preview_image": self.list_images_preview[self.idx_img_preview_selected]
-        })
-
-        self.write_json()
-        self.idx_movie += 1
-        return self.get_list_images_movie()
-
-    def img_movie_delete(self):
-        if self.idx_img_movie_selected is not None and 0 <= self.idx_img_movie_selected < len(self.data)+1:
-            del self.data[self.idx_img_movie_selected]
-            self.idx_img_movie_selected = None
         else:
-            print(f"Invalid movie image index for deletion: {self.idx_img_movie_selected}")
+            # generate new user id
-        return self.get_list_images_movie()
+            self.user_id = uuid.uuid4().hex
+            print(f"made new user_id: {self.user_id} at {get_time('second')}")
 
-    def img_movie_later(self):
+    def save_latents(self, fp_latents, list_latents):
-        if self.idx_img_movie_selected is not None and self.idx_img_movie_selected < len(self.data):
+        r"""
-            # Swap the selected image with the next one
+        Saves a latent trajectory on disk, in npy format.
-            self.data[self.idx_img_movie_selected], self.data[self.idx_img_movie_selected + 1] = \
+        """
-                self.data[self.idx_img_movie_selected+1], self.data[self.idx_img_movie_selected]
+        list_latents_cpu = [l.cpu().numpy() for l in list_latents]
-            self.idx_img_movie_selected = None
+        np.save(fp_latents, list_latents_cpu)
+
+    def load_latents(self, fp_latents):
+        r"""
+        Loads a latent trajectory from disk, converts to torch tensor.
+        """
+        list_latents_cpu = np.load(fp_latents)
+        list_latents = [torch.from_numpy(l).to(self.lb.device) for l in list_latents_cpu]
+        return list_latents
+
+    def compute_img1(self, *args):
+        r"""
+        Computes the first transition image and returns it for display.
+        Sets all other transition images and last image to empty (as they are obsolete with this operation)
+        """
+        list_ui_vals = args
+        self.setup_lb(list_ui_vals)
+        fp_img1 = os.path.join(self.dp_imgs, f"img1_{self.user_id}")
+        img1 = Image.fromarray(self.lb.compute_latents1(return_image=True))
+        img1.save(fp_img1 + ".jpg")
+        self.save_latents(fp_img1 + ".npy", self.lb.tree_latents[0])
+        self.recycle_img1 = True
+        self.recycle_img2 = False
+        return [fp_img1 + ".jpg", self.fp_img_empty, self.fp_img_empty, self.fp_img_empty, self.fp_img_empty, self.user_id]
+
+    def compute_img2(self, *args):
+        r"""
+        Computes the last transition image and returns it for display.
+        Sets all other transition images to empty (as they are obsolete with this operation)
+        """
+        if not os.path.isfile(os.path.join(self.dp_imgs, f"img1_{self.user_id}.jpg")):  # don't do anything
+            return [self.fp_img_empty, self.fp_img_empty, self.fp_img_empty, self.fp_img_empty, self.user_id]
+        list_ui_vals = args
+        self.setup_lb(list_ui_vals)
+
+        self.lb.tree_latents[0] = self.load_latents(os.path.join(self.dp_imgs, f"img1_{self.user_id}.npy"))
+        fp_img2 = os.path.join(self.dp_imgs, f"img2_{self.user_id}")
+        img2 = Image.fromarray(self.lb.compute_latents2(return_image=True))
+        img2.save(fp_img2 + '.jpg')
+        self.save_latents(fp_img2 + ".npy", self.lb.tree_latents[-1])
+        self.recycle_img2 = True
+        # fixme save seeds. change filenames?
+        return [self.fp_img_empty, self.fp_img_empty, self.fp_img_empty, fp_img2 + ".jpg", self.user_id]
+
+    def compute_transition(self, *args):
+        r"""
+        Computes transition images and movie.
+        """
+        list_ui_vals = args
+        self.setup_lb(list_ui_vals)
+        print("STARTING TRANSITION...")
+        fixed_seeds = [self.seed1, self.seed2]
+        # Inject loaded latents (other user interference)
+        self.lb.tree_latents[0] = self.load_latents(os.path.join(self.dp_imgs, f"img1_{self.user_id}.npy"))
+        self.lb.tree_latents[-1] = self.load_latents(os.path.join(self.dp_imgs, f"img2_{self.user_id}.npy"))
+        imgs_transition = self.lb.run_transition(
+            recycle_img1=self.recycle_img1,
+            recycle_img2=self.recycle_img2,
+            num_inference_steps=self.num_inference_steps,
+            depth_strength=self.depth_strength,
+            t_compute_max_allowed=self.t_compute_max_allowed,
+            fixed_seeds=fixed_seeds)
+        print(f"Latent Blending pass finished ({get_time('second')}). Resulted in {len(imgs_transition)} images")
+
+        # Subselect three preview images
+        idx_img_prev = np.round(np.linspace(0, len(imgs_transition) - 1, 5)[1:-1]).astype(np.int32)
+
+        list_imgs_preview = []
+        for j in idx_img_prev:
+            list_imgs_preview.append(Image.fromarray(imgs_transition[j]))
+
+        # Save the preview imgs as jpgs on disk so we are not sending umcompressed data around
+        current_timestamp = get_time('second')
+        self.list_fp_imgs_current = []
+        for i in range(len(list_imgs_preview)):
+            fp_img = os.path.join(self.dp_imgs, f"img_preview_{i}_{current_timestamp}.jpg")
+            list_imgs_preview[i].save(fp_img)
+            self.list_fp_imgs_current.append(fp_img)
+        # Insert cheap frames for the movie
+        imgs_transition_ext = add_frames_linear_interp(imgs_transition, self.duration_video, self.fps)
+
+        # Save as movie
+        self.fp_movie = self.get_fp_video_last()
+        if os.path.isfile(self.fp_movie):
+            os.remove(self.fp_movie)
+        ms = MovieSaver(self.fp_movie, fps=self.fps)
+        for img in tqdm(imgs_transition_ext):
+            ms.write_frame(img)
+        ms.finalize()
+        print("DONE SAVING MOVIE! SENDING BACK...")
+
+        # Assemble Output, updating the preview images and le movie
+        list_return = self.list_fp_imgs_current + [self.fp_movie]
+        return list_return
+
+    def stack_forward(self, prompt2, seed2):
+        r"""
+        Allows to generate multi-segment movies. Sets last image -> first image with all
+        relevant parameters.
+        """
+        # Save preview images, prompts and seeds into dictionary for stacking
+        if len(self.list_all_segments) == 0:
+            timestamp_session = get_time('second')
+            self.dp_session = os.path.join(self.dp_out, f"session_{timestamp_session}")
+            os.makedirs(self.dp_session)
+
+        idx_segment = len(self.list_all_segments)
+        dp_segment = os.path.join(self.dp_session, f"segment_{str(idx_segment).zfill(3)}")
+
+        self.list_all_segments.append(dp_segment)
+        self.lb.write_imgs_transition(dp_segment)
+
+        fp_movie_last = self.get_fp_video_last()
+        fp_movie_next = self.get_fp_video_next()
+
+        shutil.copyfile(fp_movie_last, fp_movie_next)
+
+        self.lb.tree_latents[0] = self.load_latents(os.path.join(self.dp_imgs, f"img1_{self.user_id}.npy"))
+        self.lb.tree_latents[-1] = self.load_latents(os.path.join(self.dp_imgs, f"img2_{self.user_id}.npy"))
+        self.lb.swap_forward()
+
+        shutil.copyfile(os.path.join(self.dp_imgs, f"img2_{self.user_id}.npy"), os.path.join(self.dp_imgs, f"img1_{self.user_id}.npy"))
+        fp_multi = self.multi_concat()
+        list_out = [fp_multi]
+
+        list_out.extend([os.path.join(self.dp_imgs, f"img2_{self.user_id}.jpg")])
+        list_out.extend([self.fp_img_empty] * 4)
+        list_out.append(gr.update(interactive=False, value=prompt2))
+        list_out.append(gr.update(interactive=False, value=seed2))
+        list_out.append("")
+        list_out.append(np.random.randint(0, 10000000))
+        print(f"stack_forward: fp_multi {fp_multi}")
+        return list_out
+
+    def multi_concat(self):
+        r"""
+        Concatentates all stacked segments into one long movie.
+        """
+        list_fp_movies = self.get_fp_video_all()
+        # Concatenate movies and save
+        fp_final = os.path.join(self.dp_session, f"concat_{self.user_id}.mp4")
+        concatenate_movies(fp_final, list_fp_movies)
+        return fp_final
+
+    def get_fp_video_all(self):
+        r"""
+        Collects all stacked movie segments.
+        """
+        list_all = os.listdir(self.dp_movies)
+        str_beg = f"movie_{self.user_id}_"
+        list_user = [l for l in list_all if str_beg in l]
+        list_user.sort()
+        list_user = [os.path.join(self.dp_movies, l) for l in list_user]
+        return list_user
+
+    def get_fp_video_next(self):
+        r"""
+        Gets the filepath of the next movie segment.
+        """
+        list_videos = self.get_fp_video_all()
+        if len(list_videos) == 0:
+            idx_next = 0
         else:
-            print("Cannot move the image later in the sequence.")
+            idx_next = len(list_videos)
-        return self.get_list_images_movie()
+        fp_video_next = os.path.join(self.dp_movies, f"movie_{self.user_id}_{str(idx_next).zfill(3)}.mp4")
+        return fp_video_next
 
-    def img_movie_earlier(self):
+    def get_fp_video_last(self):
-        if self.idx_img_movie_selected is not None and self.idx_img_movie_selected > 0:
+        r"""
-            # Swap the selected image with the previous one
+        Gets the current video that was saved.
-            self.data[self.idx_img_movie_selected-1], self.data[self.idx_img_movie_selected] = \
+        """
-                self.data[self.idx_img_movie_selected], self.data[self.idx_img_movie_selected-1]
+        fp_video_last = os.path.join(self.dp_movies, f"last_{self.user_id}.mp4")
-            self.idx_img_movie_selected = None
+        return fp_video_last
-        else:
-            print("Cannot move the image earlier in the sequence.")
-        return self.get_list_images_movie()
 
 
-    def generate_movie(self, t_per_segment=10):
-        print("starting movie gen")
-        list_prompts = []
-        list_negative_prompts = []
-        list_seeds = []
-
-        # Extract prompts, negative prompts, and seeds from the data
-        for item in self.data: 
-            list_prompts.append(item["prompt"])
-            list_negative_prompts.append(item["negative_prompt"])
-            list_seeds.append(item["seed"])
-
-        list_movie_parts = []
-        for i in range(len(list_prompts) - 1):
-            # For a multi transition we can save some computation time and recycle the latents
-            if i == 0:
-                self.be.set_prompt1(list_prompts[i])
-                self.be.set_negative_prompt(list_negative_prompts[i])
-                self.be.set_prompt2(list_prompts[i + 1])
-                recycle_img1 = False
-            else:
-                self.be.swap_forward()
-                self.be.set_negative_prompt(list_negative_prompts[i+1])
-                self.be.set_prompt2(list_prompts[i + 1])
-                recycle_img1 = True
-
-            fp_movie_part = f"tmp_part_{str(i).zfill(3)}.mp4"
-            fixed_seeds = list_seeds[i:i + 2]
-            # Run latent blending
-            self.be.run_transition(
-                recycle_img1=recycle_img1,
-                fixed_seeds=fixed_seeds)
-
-            # Save movie
-            self.be.write_movie_transition(fp_movie_part, t_per_segment)
-            list_movie_parts.append(fp_movie_part)
-
-        # Finally, concatenate the result
-        concatenate_movies(self.fp_movie, list_movie_parts)
-        print(f"DONE! MOVIE SAVED IN {self.fp_movie}")
-        return self.fp_movie
-
-#%% Runtime engine
-
 if __name__ == "__main__":
+#    fp_ckpt = hf_hub_download(repo_id="stabilityai/stable-diffusion-2-1-base", filename="v2-1_512-ema-pruned.ckpt")
+    fp_ckpt = hf_hub_download(repo_id="stabilityai/stable-diffusion-2-1", filename="v2-1_768-ema-pruned.ckpt")
+    bf = BlendingFrontend(StableDiffusionHolder(fp_ckpt))
+    # self = BlendingFrontend(None)
 
-    # Change Parameters below
-    parser = argparse.ArgumentParser(description="Latent Blending GUI")
-    parser.add_argument("--do_compile", type=bool, default=False)
-    parser.add_argument("--nmb_preview_images", type=int, default=4)
-    parser.add_argument("--server_name", type=str, default=None)
-    try:
-        args = parser.parse_args()
-        nmb_preview_images = args.nmb_preview_images
-        do_compile = args.do_compile
-        server_name = args.server_name
-
-    except SystemExit:
-        # If the script is run in an interactive environment (like Jupyter), parse_args might fail.
-        nmb_preview_images = 4
-        do_compile = False # compile SD pipes with sdfast
-        server_name = None
-
-    mur = MultiUserRouter(do_compile=do_compile)
     with gr.Blocks() as demo:
-        with gr.Accordion("Setup", open=True) as accordion_setup:
+        gr.HTML("""<h1>Latent Blending</h1>
-            # New user registration, model selection, ...
+<p>Create butter-smooth transitions between prompts, powered by stable diffusion</p>
-            with gr.Row():
+<p>For faster inference without waiting in queue, you may duplicate the space and upgrade to GPU in settings.
-                model = gr.Dropdown(mur.list_models, value=mur.list_models[0], label="model")
+<br/>
-                width = gr.Slider(256, 2048, 512, step=128, label='width', interactive=True)
+<a href="https://huggingface.co/spaces/lunarring/latentblending?duplicate=true">
-                height = gr.Slider(256, 2048, 512, step=128, label='height', interactive=True)
+<img style="margin-top: 0em; margin-bottom: 0em" src="https://bit.ly/3gLdBN6" alt="Duplicate Space"></a>
-                user_id = gr.Textbox(label="user id (filled automatically)", interactive=False)
+</p>""")
-                b_start_session = gr.Button('start session', variant='primary')
 
-        with gr.Accordion("Latent Blending (expand with arrow on right side after you clicked 'start session')", open=False) as accordion_latentblending:
+        with gr.Row():
-            with gr.Row():
+            prompt1 = gr.Textbox(label="prompt 1")
-                prompt = gr.Textbox(label="prompt")
+            prompt2 = gr.Textbox(label="prompt 2")
-                negative_prompt = gr.Textbox(label="negative prompt")
-                b_compute = gr.Button('generate preview images', variant='primary')
-                b_select = gr.Button('add selected image to video', variant='primary')        
 
-            with gr.Row():
+        with gr.Row():
-                gallery_preview = gr.Gallery(
+            duration_compute = gr.Slider(10, 25, bf.t_compute_max_allowed, step=1, label='waiting time', interactive=True)
-            label="Generated images", show_label=False, elem_id="gallery"
+            duration_video = gr.Slider(1, 100, bf.duration_video, step=0.1, label='video duration', interactive=True)
-        , columns=[nmb_preview_images], rows=[1], object_fit="contain", height="auto", allow_preview=False, interactive=False)
+            height = gr.Slider(256, 1024, bf.height, step=128, label='height', interactive=True)
+            width = gr.Slider(256, 1024, bf.width, step=128, label='width', interactive=True)
 
+        with gr.Accordion("Advanced Settings (click to expand)", open=False):
 
-            with gr.Row():
+            with gr.Accordion("Diffusion settings", open=True):
-                gr.Markdown("Your movie contains the following images (see below)")
+                with gr.Row():
-            with gr.Row():
+                    num_inference_steps = gr.Slider(5, 100, bf.num_inference_steps, step=1, label='num_inference_steps', interactive=True)
-                gallery_movie = gr.Gallery(
+                    guidance_scale = gr.Slider(1, 25, bf.guidance_scale, step=0.1, label='guidance_scale', interactive=True)
-            label="Generated images", show_label=False, elem_id="gallery"
+                    negative_prompt = gr.Textbox(label="negative prompt")
-        , columns=[20], rows=[1], object_fit="contain", height="auto", allow_preview=False, interactive=False)        
 
+            with gr.Accordion("Seed control: adjust seeds for first and last images", open=True):
+                with gr.Row():
+                    b_newseed1 = gr.Button("randomize seed 1", variant='secondary')
+                    seed1 = gr.Number(bf.seed1, label="seed 1", interactive=True)
+                    seed2 = gr.Number(bf.seed2, label="seed 2", interactive=True)
+                    b_newseed2 = gr.Button("randomize seed 2", variant='secondary')
 
-            with gr.Row():
+            with gr.Accordion("Last image crossfeeding.", open=True):
-                b_delete = gr.Button('delete selected image')
+                with gr.Row():
-                b_move_earlier = gr.Button('move image to earlier time')
+                    branch1_crossfeed_power = gr.Slider(0.0, 1.0, bf.branch1_crossfeed_power, step=0.01, label='branch1 crossfeed power', interactive=True)
-                b_move_later = gr.Button('move image to later time')
+                    branch1_crossfeed_range = gr.Slider(0.0, 1.0, bf.branch1_crossfeed_range, step=0.01, label='branch1 crossfeed range', interactive=True)
+                    branch1_crossfeed_decay = gr.Slider(0.0, 1.0, bf.branch1_crossfeed_decay, step=0.01, label='branch1 crossfeed decay', interactive=True)
 
-            with gr.Row():
+            with gr.Accordion("Transition settings", open=True):
-                b_generate_movie = gr.Button('generate movie', variant='primary')
+                with gr.Row():
-                t_per_segment = gr.Slider(1, 30, 10, step=0.1, label='time per segment', interactive=True)
+                    parental_crossfeed_power = gr.Slider(0.0, 1.0, bf.parental_crossfeed_power, step=0.01, label='parental crossfeed power', interactive=True)
+                    parental_crossfeed_range = gr.Slider(0.0, 1.0, bf.parental_crossfeed_range, step=0.01, label='parental crossfeed range', interactive=True)
+                    parental_crossfeed_power_decay = gr.Slider(0.0, 1.0, bf.parental_crossfeed_power_decay, step=0.01, label='parental crossfeed decay', interactive=True)
+                with gr.Row():
+                    depth_strength = gr.Slider(0.01, 0.99, bf.depth_strength, step=0.01, label='depth_strength', interactive=True)
+                    guidance_scale_mid_damper = gr.Slider(0.01, 2.0, bf.guidance_scale_mid_damper, step=0.01, label='guidance_scale_mid_damper', interactive=True)
 
-            with gr.Row():
+        with gr.Row():
-                movie = gr.Video()
+            b_compute1 = gr.Button('step1: compute first image', variant='primary')
+            b_compute2 = gr.Button('step2: compute last image', variant='primary')
+            b_compute_transition = gr.Button('step3: compute transition', variant='primary')
 
-            # bindings
+        with gr.Row():
-            b_start_session.click(mur.register_new_user, inputs=[model, width, height], outputs=user_id)
+            img1 = gr.Image(label="1/5")
-            b_compute.click(mur.compute_imgs, inputs=[user_id, prompt, negative_prompt], outputs=gallery_preview)
+            img2 = gr.Image(label="2/5", show_progress=False)
-            b_select.click(mur.add_image_to_video, user_id, gallery_movie)
+            img3 = gr.Image(label="3/5", show_progress=False)
-            gallery_preview.select(mur.preview_img_selected, user_id, None)
+            img4 = gr.Image(label="4/5", show_progress=False)
-            gallery_movie.select(mur.movie_img_selected, user_id, None)
+            img5 = gr.Image(label="5/5")
-            b_delete.click(mur.img_movie_delete, user_id, gallery_movie)
-            b_move_earlier.click(mur.img_movie_earlier, user_id, gallery_movie)
-            b_move_later.click(mur.img_movie_later, user_id, gallery_movie)
-            b_generate_movie.click(mur.generate_movie, [user_id, t_per_segment], movie)
 
+        with gr.Row():
+            vid_single = gr.Video(label="current single trans")
+            vid_multi = gr.Video(label="concatented multi trans")
 
-    if server_name is None:
+        with gr.Row():
-        demo.launch(share=False, inbrowser=True, inline=False)
+            b_stackforward = gr.Button('append last movie segment (left) to multi movie (right)', variant='primary')
-    else:
+
-        demo.launch(share=False, inbrowser=True, inline=False, server_name=server_name)
+        with gr.Row():
+            gr.Markdown(
+                """
+                # Parameters
+                ## Main
+                - waiting time: set your waiting time for the transition. high values = better quality
+                - video duration: seconds per segment
+                - height/width: in pixels
+
+                ## Diffusion settings
+                - num_inference_steps: number of diffusion steps
+                - guidance_scale: latent blending seems to prefer lower values here
+                - negative prompt: enter negative prompt here, applied for all images
+
+                ## Last image crossfeeding
+                - branch1_crossfeed_power: Controls the level of cross-feeding between the first and last image branch. For preserving structures.
+                - branch1_crossfeed_range: Sets the duration of active crossfeed during development. High values enforce strong structural similarity.
+                - branch1_crossfeed_decay: Sets decay for branch1_crossfeed_power. Lower values make the decay stronger across the range.
+
+                ## Transition settings
+                - parental_crossfeed_power: Similar to branch1_crossfeed_power, however applied for the images withinin the transition.
+                - parental_crossfeed_range: Similar to branch1_crossfeed_range, however applied for the images withinin the transition.
+                - parental_crossfeed_power_decay: Similar to branch1_crossfeed_decay, however applied for the images withinin the transition.
+                - depth_strength: Determines when the blending process will begin in terms of diffusion steps. Low values more inventive but can cause motion.
+                - guidance_scale_mid_damper: Decreases the guidance scale in the middle of a transition.
+                """)
+
+        with gr.Row():
+            user_id = gr.Textbox(label="user id", interactive=False)
+
+        # Collect all UI elemts in list to easily pass as inputs in gradio
+        dict_ui_elem = {}
+        dict_ui_elem["prompt1"] = prompt1
+        dict_ui_elem["negative_prompt"] = negative_prompt
+        dict_ui_elem["prompt2"] = prompt2
+
+        dict_ui_elem["duration_compute"] = duration_compute
+        dict_ui_elem["duration_video"] = duration_video
+        dict_ui_elem["height"] = height
+        dict_ui_elem["width"] = width
+
+        dict_ui_elem["depth_strength"] = depth_strength
+        dict_ui_elem["branch1_crossfeed_power"] = branch1_crossfeed_power
+        dict_ui_elem["branch1_crossfeed_range"] = branch1_crossfeed_range
+        dict_ui_elem["branch1_crossfeed_decay"] = branch1_crossfeed_decay
+
+        dict_ui_elem["num_inference_steps"] = num_inference_steps
+        dict_ui_elem["guidance_scale"] = guidance_scale
+        dict_ui_elem["guidance_scale_mid_damper"] = guidance_scale_mid_damper
+        dict_ui_elem["seed1"] = seed1
+        dict_ui_elem["seed2"] = seed2
+
+        dict_ui_elem["parental_crossfeed_range"] = parental_crossfeed_range
+        dict_ui_elem["parental_crossfeed_power"] = parental_crossfeed_power
+        dict_ui_elem["parental_crossfeed_power_decay"] = parental_crossfeed_power_decay
+        dict_ui_elem["user_id"] = user_id
+
+        # Convert to list, as gradio doesn't seem to accept dicts
+        list_ui_vals = []
+        list_ui_keys = []
+        for k in dict_ui_elem.keys():
+            list_ui_vals.append(dict_ui_elem[k])
+            list_ui_keys.append(k)
+        bf.list_ui_keys = list_ui_keys
+
+        b_newseed1.click(bf.randomize_seed1, outputs=seed1)
+        b_newseed2.click(bf.randomize_seed2, outputs=seed2)
+        b_compute1.click(bf.compute_img1, inputs=list_ui_vals, outputs=[img1, img2, img3, img4, img5, user_id])
+        b_compute2.click(bf.compute_img2, inputs=list_ui_vals, outputs=[img2, img3, img4, img5, user_id])
+        b_compute_transition.click(bf.compute_transition,
+                                   inputs=list_ui_vals,
+                                   outputs=[img2, img3, img4, vid_single])
+
+        b_stackforward.click(bf.stack_forward,
+                             inputs=[prompt2, seed2],
+                             outputs=[vid_multi, img1, img2, img3, img4, img5, prompt1, seed1, prompt2])
+
+    demo.launch(share=bf.share, inbrowser=True, inline=False)