sv4d: fix readme;

rename video exampel folder;
add encode_t as input parameter.

README.md

@@ -9,23 +9,23 @@
 - We are releasing **[Stable Video 4D (SV4D)](https://huggingface.co/stabilityai/sv4d)**, a video-to-4D diffusion model for novel-view video synthesis. For research purposes:
     - **SV4D** was trained to generate 40 frames (5 video frames x 8 camera views) at 576x576 resolution, given 5 context frames (the input video), and 8 reference views (synthesised from the first frame of the input video, using a multi-view diffusion model like SV3D) of the same size, ideally white-background images with one object.
     - To generate longer novel-view videos (21 frames), we propose a novel sampling method using SV4D, by first sampling 5 anchor frames and then densely sampling the remaining frames while maintaining temporal consistency.
-    - You can run the community-build gradio demo locally by running `python -m scripts.demo.gradio_app_sv4d`.
+    - To run the community-build gradio demo locally, run `python -m scripts.demo.gradio_app_sv4d`.
     - Please check our [project page](https://sv4d.github.io), [tech report](https://sv4d.github.io/static/sv4d_technical_report.pdf) and [video summary](https://www.youtube.com/watch?v=RBP8vdAWTgk) for more details.
 
-**QUICKSTART** : `python scripts/sampling/simple_video_sample_4d.py --input_path assets/sv4d_example_video/test_video1.mp4 --output_folder outputs/sv4d` (after downloading [sv4d.safetensors](https://huggingface.co/stabilityai/sv4d) and [sv3d_u.safetensors](https://huggingface.co/stabilityai/sv3d) from HuggingFace into `checkpoints/`)
+**QUICKSTART** : `python scripts/sampling/simple_video_sample_4d.py --input_path assets/sv4d_videos/test_video1.mp4 --output_folder outputs/sv4d` (after downloading [sv4d.safetensors](https://huggingface.co/stabilityai/sv4d) and [sv3d_u.safetensors](https://huggingface.co/stabilityai/sv3d) from HuggingFace into `checkpoints/`)
 
 To run **SV4D** on a single input video of 21 frames:
 - Download SV3D models (`sv3d_u.safetensors` and `sv3d_p.safetensors`) from [here](https://huggingface.co/stabilityai/sv3d) and SV4D model (`sv4d.safetensors`) from [here](https://huggingface.co/stabilityai/sv4d) to `checkpoints/`
 - Run `python scripts/sampling/simple_video_sample_4d.py --input_path <path/to/video>`
     - `input_path` : The input video `<path/to/video>` can be
-      - a single video file in `gif` or `mp4` format, such as `assets/sv4d_example_video/test_video1.mp4`, or
+      - a single video file in `gif` or `mp4` format, such as `assets/sv4d_videos/test_video1.mp4`, or
       - a folder containing images of video frames in `.jpg`, `.jpeg`, or `.png` format, or
       - a file name pattern matching images of video frames.
     - `num_steps` : default is 20, can increase to 50 for better quality but longer sampling time.
     - `sv3d_version` : To specify the SV3D model to generate reference multi-views, set `--sv3d_version=sv3d_u` for SV3D_u or `--sv3d_version=sv3d_p` for SV3D_p.
     - `elevations_deg` : To generate novel-view videos at a specified elevation (default elevation is 10) using SV3D_p (default is SV3D_u), run `python scripts/sampling/simple_video_sample_4d.py --input_path test_video1.mp4 --sv3d_version sv3d_p --elevations_deg 30.0`
-    - **Background removal** : For input videos with plain background, (optionally) use [rembg](https://github.com/danielgatis/rembg) to remove background and crop video frames by setting `--remove_bg=True`. To obtain higher quality outputs on real-world input videos with noisy background, try segmenting the foreground object using [Cliipdrop](https://clipdrop.co/) before running SV4D.
-    - **Low VRAM environment** : To run on GPUs with low VRAM, try setting `--decoding_t=1` (of frames decoded at a time) or lower video resolution like `--img_size=512`.
+    - **Background removal** : For input videos with plain background, (optionally) use [rembg](https://github.com/danielgatis/rembg) to remove background and crop video frames by setting `--remove_bg=True`. To obtain higher quality outputs on real-world input videos with noisy background, try segmenting the foreground object using [Clipdrop](https://clipdrop.co/) or [SAM2](https://github.com/facebookresearch/segment-anything-2) before running SV4D.
+    - **Low VRAM environment** : To run on GPUs with low VRAM, try setting `--encoding_t=1` (of frames encoded at a time) and `--decoding_t=1` (of frames decoded at a time) or lower video resolution like `--img_size=512`.
 
   ![tile](assets/sv4d.gif)
 

scripts/demo/gradio_app_sv4d.py

@@ -14,6 +14,7 @@ from huggingface_hub import hf_hub_download
 from typing import List, Optional, Union
 import torchvision
 
+from sgm.modules.encoders.modules import VideoPredictionEmbedderWithEncoder
 from scripts.demo.sv4d_helpers import (
     decode_latents,
     load_model,
@@ -138,6 +139,7 @@ sv3d_model = initial_model_load(sv3d_model)
 def sample_anchor(
     input_path: str = "assets/test_image.png",  # Can either be image file or folder with image files
     seed: Optional[int] = None,
+    encoding_t: int = 8,  # Number of frames encoded at a time! This eats most VRAM. Reduce if necessary.
     decoding_t: int = 4,  # Number of frames decoded at a time! This eats most VRAM. Reduce if necessary.
     num_steps: int = 20,
     sv3d_version: str = "sv3d_u",  # sv3d_u or sv3d_p
@@ -205,6 +207,10 @@ def sample_anchor(
     sv3d_file = os.path.join(output_folder, "t000.mp4")
     save_video(sv3d_file, images_t0.unsqueeze(1))
     
+    for emb in model.conditioner.embedders:
+        if isinstance(emb, VideoPredictionEmbedderWithEncoder):
+            emb.en_and_decode_n_samples_a_time = encoding_t
+    model.en_and_decode_n_samples_a_time = decoding_t
     # Initialize image matrix
     img_matrix = [[None] * n_views for _ in range(n_frames)]
     for i, v in enumerate(subsampled_views):
@@ -413,6 +419,13 @@ with gr.Blocks() as demo:
             maximum=100,
             step=1,
         )
+        encoding_t = gr.Slider(
+            label="Encode n frames at a time",
+            info="Number of frames encoded at a time! This eats most VRAM. Reduce if necessary.",
+            value=8,
+            minimum=1,
+            maximum=40,
+        )
         decoding_t = gr.Slider(
             label="Decode n frames at a time",
             info="Number of frames decoded at a time! This eats most VRAM. Reduce if necessary.",
@@ -440,7 +453,7 @@ with gr.Blocks() as demo:
 
     generate_btn.click(
         fn=sample_anchor,
-        inputs=[input_video, seed, decoding_t, denoising_steps],
+        inputs=[input_video, seed, encoding_t, decoding_t, denoising_steps],
         outputs=[sv3d_video, anchor_video, anchor_frames],
         api_name="SV4D output (5 frames)",
     )
@@ -455,22 +468,22 @@ with gr.Blocks() as demo:
     examples = gr.Examples(
         fn=preprocess_video,
         examples=[
-            "./assets/sv4d_example_video/test_video1.mp4",
-            "./assets/sv4d_example_video/test_video2.mp4",
-            "./assets/sv4d_example_video/green_robot.mp4",
-            "./assets/sv4d_example_video/dolphin.mp4",
-            "./assets/sv4d_example_video/lucia_v000.mp4",
-            "./assets/sv4d_example_video/snowboard_v000.mp4",
-            "./assets/sv4d_example_video/stroller_v000.mp4",
-            "./assets/sv4d_example_video/human5.mp4",
-            "./assets/sv4d_example_video/bunnyman.mp4",
-            "./assets/sv4d_example_video/hiphop_parrot.mp4",
-            "./assets/sv4d_example_video/guppie_v0.mp4",
-            "./assets/sv4d_example_video/wave_hello.mp4",
-            "./assets/sv4d_example_video/pistol_v0.mp4",
-            "./assets/sv4d_example_video/human7.mp4",
-            "./assets/sv4d_example_video/monkey.mp4",
-            "./assets/sv4d_example_video/train_v0.mp4",
+            "./assets/sv4d_videos/test_video1.mp4",
+            "./assets/sv4d_videos/test_video2.mp4",
+            "./assets/sv4d_videos/green_robot.mp4",
+            "./assets/sv4d_videos/dolphin.mp4",
+            "./assets/sv4d_videos/lucia_v000.mp4",
+            "./assets/sv4d_videos/snowboard_v000.mp4",
+            "./assets/sv4d_videos/stroller_v000.mp4",
+            "./assets/sv4d_videos/human5.mp4",
+            "./assets/sv4d_videos/bunnyman.mp4",
+            "./assets/sv4d_videos/hiphop_parrot.mp4",
+            "./assets/sv4d_videos/guppie_v0.mp4",
+            "./assets/sv4d_videos/wave_hello.mp4",
+            "./assets/sv4d_videos/pistol_v0.mp4",
+            "./assets/sv4d_videos/human7.mp4",
+            "./assets/sv4d_videos/monkey.mp4",
+            "./assets/sv4d_videos/train_v0.mp4",
         ],
         inputs=[input_video],
         run_on_click=True,

scripts/demo/sv4d_helpers.py

@@ -264,7 +264,7 @@ def preprocess_video(input_path, remove_bg=False, n_frames=21, W=576, H=576, out
         
         images_v0.append(image)
     
-    base_count = len(glob(os.path.join(output_folder, "*.mp4"))) // 10
+    base_count = len(glob(os.path.join(output_folder, "*.mp4"))) // 12
     processed_file = os.path.join(output_folder, f"{base_count:06d}_process_input.mp4")
     imageio.mimwrite(processed_file, images_v0, fps=10)
     return processed_file
@@ -892,7 +892,6 @@ def do_sample(
                 unload_module_gpu(model.model)
                 unload_module_gpu(model.denoiser)
                 load_module_gpu(model.first_stage_model)
-                model.en_and_decode_n_samples_a_time = decoding_t
                 if isinstance(model.first_stage_model.decoder, VideoDecoder):
                     samples_x = model.decode_first_stage(
                         samples_z, timesteps=default(decoding_t, T)

scripts/sampling/configs/sv4d.yaml

@@ -1,7 +1,6 @@
 N_TIME: 5
 N_VIEW: 8
 N_FRAMES: 40
-ENCODE_N_A_TIME: 8
 
 model:
   target: sgm.models.diffusion.DiffusionEngine
@@ -68,7 +67,6 @@ model:
             is_ae: True
             n_cond_frames: ${N_FRAMES}
             n_copies: 1
-            en_and_decode_n_samples_a_time: ${ENCODE_N_A_TIME}
             encoder_config:
               target: sgm.models.autoencoder.AutoencoderKLModeOnly
               params:
@@ -133,7 +131,6 @@ model:
             is_ae: True
             n_cond_frames: ${N_VIEW}
             n_copies: 1
-            en_and_decode_n_samples_a_time: ${ENCODE_N_A_TIME}
             sigma_sampler_config:
               target: sgm.modules.diffusionmodules.sigma_sampling.ZeroSampler
 
@@ -144,7 +141,6 @@ model:
             is_ae: True
             n_cond_frames: ${N_TIME}
             n_copies: 1
-            en_and_decode_n_samples_a_time: ${ENCODE_N_A_TIME}
             encoder_config:
               target: sgm.models.autoencoder.AutoencoderKLModeOnly
               params:

scripts/sampling/simple_video_sample_4d.py

@@ -10,6 +10,7 @@ import numpy as np
 import torch
 from fire import Fire
 
+from sgm.modules.encoders.modules import VideoPredictionEmbedderWithEncoder
 from scripts.demo.sv4d_helpers import (
     decode_latents,
     load_model,
@@ -35,6 +36,7 @@ def sample(
     motion_bucket_id: int = 127,
     cond_aug: float = 1e-5,
     seed: int = 23,
+    encoding_t: int = 8,  # Number of frames encoded at a time! This eats most VRAM. Reduce if necessary.
     decoding_t: int = 4,  # Number of frames decoded at a time! This eats most VRAM. Reduce if necessary.
     device: str = "cuda",
     elevations_deg: Optional[Union[float, List[float]]] = 10.0,
@@ -45,7 +47,7 @@ def sample(
 ):
     """
     Simple script to generate multiple novel-view videos conditioned on a video `input_path` or multiple frames, one for each
-    image file in folder `input_path`. If you run out of VRAM, try decreasing `decoding_t`.
+    image file in folder `input_path`. If you run out of VRAM, try decreasing `decoding_t` and `encoding_t`.
     """
     # Set model config
     T = 5  # number of frames per sample
@@ -162,6 +164,10 @@ def sample(
         verbose,
     )
     model = initial_model_load(model)
+    for emb in model.conditioner.embedders:
+        if isinstance(emb, VideoPredictionEmbedderWithEncoder):
+            emb.en_and_decode_n_samples_a_time = encoding_t
+    model.en_and_decode_n_samples_a_time = decoding_t
 
     # Interleaved sampling for anchor frames
     t0, v0 = 0, 0