ProPainter: Improving Propagation and Transformer for Video Inpainting

Shangchen Zhou  Chongyi Li  Kelvin C.K. Chan  Chen Change Loy

S-Lab, Nanyang Technological University 

ICCV 2023

⭐ If ProPainter is helpful to your projects, please help star this repo. Thanks! 🤗

📖 For more visual results, go checkout our project page

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Update

• 2023.09.24: We remove the watermark removal demos officially to prevent the misuse of our work for unethical purposes.
• 2023.09.21: Add features for memory-efficient inference. Check our GPU memory requirements. 🚀
• 2023.09.07: Our code and model are publicly available. 🐳
• 2023.09.01: This repo is created.

TODO

• Make a interactive Gradio demo.
• Make a Colab demo.
• Update features for memory-efficient inference.

Results

👨🏻‍🎨 Object Removal

🎨 Video Completion

Overview

Dependencies and Installation

1. Clone Repo

   git clone https://github.com/sczhou/ProPainter.git

2. Create Conda Environment and Install Dependencies

   # create new anaconda env
   conda create -n propainter python=3.8 -y
   conda activate propainter
   
   # install python dependencies
   pip3 install -r requirements.txt

   • CUDA >= 9.2
   • PyTorch >= 1.7.1
   • Torchvision >= 0.8.2
   • Other required packages in requirements.txt

Get Started

Prepare pretrained models

Download our pretrained models from Releases V0.1.0 to the weights folder. (All pretrained models can also be automatically downloaded during the first inference.)

The directory structure will be arranged as:

weights
   |- ProPainter.pth
   |- recurrent_flow_completion.pth
   |- raft-things.pth
   |- i3d_rgb_imagenet.pt (for evaluating VFID metric)
   |- README.md

🏂 Quick test

We provide some examples in the inputs folder. Run the following commands to try it out:

# The first example (object removal)
python inference_propainter.py --video inputs/object_removal/bmx-trees --mask inputs/object_removal/bmx-trees_mask 
# The second example (video completion)
python inference_propainter.py --video inputs/video_completion/running_car.mp4 --mask inputs/video_completion/mask_square.png --height 240 --width 432

The results will be saved in the results folder. To test your own videos, please prepare the input mp4 video (or split frames) and frame-wise mask(s).

If you want to specify the video resolution for processing or avoid running out of memory, you can set the video size of --width and --height:

# process a 576x320 video; set --fp16 to use fp16 (half precision) during inference.
python inference_propainter.py --video inputs/video_completion/running_car.mp4 --mask inputs/video_completion/mask_square.png --height 320 --width 576 --fp16

🚀 Memory-efficient inference

Video inpainting typically requires a significant amount of GPU memory. Here, we offer various features that facilitate memory-efficient inference, effectively avoiding the Out-Of-Memory (OOM) error. You can use the following options to reduce memory usage further:

• Reduce the number of local neighbors through decreasing the --neighbor_length (default 10).
• Reduce the number of global references by increasing the --ref_stride (default 10).
• Set the --resize_ratio (default 1.0) to resize the processing video.
• Set a smaller video size via specifying the --width and --height.
• Set --fp16 to use fp16 (half precision) during inference.
• Reduce the frames of sub-videos --subvideo_length (default 80), which effectively decouples GPU memory costs and video length.

Blow shows the estimated GPU memory requirements for different sub-video lengths with fp32/fp16 precision:

Resolution	50 frames	80 frames
1280 x 720	28G / 19G	OOM / 25G
720 x 480	11G / 7G	13G / 8G
640 x 480	10G / 6G	12G / 7G
320 x 240	3G / 2G	4G / 3G

Dataset preparation

Dataset	YouTube-VOS	DAVIS
Description	For training (3,471) and evaluation (508)	For evaluation (50 in 90)
Images	[Official Link] (Download train and test all frames)	[Official Link] (2017, 480p, TrainVal)
Masks	[Google Drive] [Baidu Disk] (For reproducing paper results; provided in ProPainter paper)

The training and test split files are provided in datasets/<dataset_name>. For each dataset, you should place JPEGImages to datasets/<dataset_name>. Resize all video frames to size 432x240 for training. Unzip downloaded mask files to datasets.

The datasets directory structure will be arranged as: (Note: please check it carefully)

datasets
   |- davis
      |- JPEGImages_432_240
         |- <video_name>
            |- 00000.jpg
            |- 00001.jpg
      |- test_masks
         |- <video_name>
            |- 00000.png
            |- 00001.png   
      |- train.json
      |- test.json
   |- youtube-vos
      |- JPEGImages_432_240
         |- <video_name>
            |- 00000.jpg
            |- 00001.jpg
      |- test_masks
         |- <video_name>
            |- 00000.png
            |- 00001.png
      |- train.json
      |- test.json   

Training

Our training configures are provided in train_flowcomp.json (for Recurrent Flow Completion Network) and train_propainter.json (for ProPainter).

Run one of the following commands for training:

 # For training Recurrent Flow Completion Network
 python train.py -c configs/train_flowcomp.json
 # For training ProPainter
 python train.py -c configs/train_propainter.json

You can run the same command to resume your training.

To speed up the training process, you can precompute optical flow for the training dataset using the following command:

 # Compute optical flow for training dataset
 python scripts/compute_flow.py --root_path <dataset_root> --save_path <save_flow_root> --height 240 --width 432

Evaluation

Run one of the following commands for evaluation:

 # For evaluating flow completion model
 python scripts/evaluate_flow_completion.py --dataset <dataset_name> --video_root <video_root> --mask_root <mask_root> --save_results
 # For evaluating ProPainter model
 python scripts/evaluate_propainter.py --dataset <dataset_name> --video_root <video_root> --mask_root <mask_root> --save_results

The scores and results will also be saved in the results_eval folder. Please --save_results for further evaluating temporal warping error.

Citation

If you find our repo useful for your research, please consider citing our paper:

@inproceedings{zhou2023propainter,
   title={{ProPainter}: Improving Propagation and Transformer for Video Inpainting},
   author={Zhou, Shangchen and Li, Chongyi and Chan, Kelvin C.K and Loy, Chen Change},
   booktitle={Proceedings of IEEE International Conference on Computer Vision (ICCV)},
   year={2023}
}

License

This project is licensed under NTU S-Lab License 1.0. Redistribution and use should follow this license.

Contact

If you have any questions, please feel free to reach me out at shangchenzhou@gmail.com.

Acknowledgement

This code is based on E²FGVI and STTN. Some code are brought from BasicVSR++. Thanks for their awesome works.