ObamaNet : Lip Sync from Audio

List of Contents

• Requirements
• Data Extraction
• Data Preprocessing
• Training Different Models
• Pretrained Model
• How to run an example
• Citations
• FAQs

Requirements

You may install the requirements by running the following command

sudo pip3 install -r requirements.txt

The project is built for python 3.5 and above. The other libraries are listed below

• OpenCV (sudo pip3 install opencv-contrib-python)
• Dlib (sudo pip3 install dlib) with this file unzipped in the data folder
• Python Speech Features (sudo pip3 install python-speech-features)

For a complete list refer to requirements.txt file.

I used the tools below to extract and manipulate the data:

• ffmpeg (sudo apt-get install ffmpeg)
• YouTube-dl

Data Extraction

---

I extracted the data from youtube using youtube-dl. It's perhaps the best downloader for youtube on linux. Commands for extracting particular streams are given below.

• Subtitle Extraction

youtube-dl --sub-lang en --skip-download --write-sub --output '~/obamanet/data/captions/%(autonumber)s.%(ext)s' --batch-file ~/obamanet/data/obama_addresses.txt --ignore-config

• Video Extraction

youtube-dl --batch-file ~/obamanet/data/obama_addresses.txt -o '~/obamanet/data/videos/%(autonumber)s.%(ext)s' -f "best[height=720]" --autonumber-start 1

(Videos not available in 720p: 165)

• Video to Audio Conversion

python3 vid2wav.py

• Video to Images

ffmpeg -i 00001.mp4 -r 1/5 -vf scale=-1:720 images/00001-$filename%05d.bmp

To convert from BMP format to JPG format, use the following in the directory

mogrify -format jpg *.bmp
rm -rf *.bmp

Copy the patched images into folder a and the cropped images to folder b

python3 tools/process.py --input_dir a --b_dir b --operation combine --output_dir c
python3 tools/split.py --dir c

You may use this pretrained model or train pix2pix from scratch using this dataset. Unzip the dataset into the pix2pix main directory.

python3 pix2pix.py --mode train --output_dir output --max_epochs 200 --input_dir c/train/ --which_direction AtoB

To run the pix2pix trained model

python3 pix2pix.py --mode test --output_dir test_out/ --input_dir c_test/ --checkpoint output/

To convert images to video

ffmpeg -r 30 -f image2 -s 256x256 -i %d-targets.png -vcodec libx264 -crf 25 ../targets.mp4

Pretrained Model

Link to the pretrained model and a subset of the data is here - Link

Download and extract the checkpoints and the data folders into the repository. The file structure should look as shown below.

obamanet
|
└─ data
|   | audios
|   | a2key_data
|   ...
|
└─ checkpoints
|   | output
|   | model.h5
|   ...
└─ train.py
└─ run.py
└─ run.sh
...

Running sample wav file

Run the following commands

bash run.sh <relative_path_to_audio_wav_file>

Example:

bash run.sh data/audios/karan.wav

Feel free to experiment with different voices. However, the result will depend on how close your voice is to the subject we trained on.

Citation

---

If you use this code for your research, please cite the paper this code is based on: ObamaNet: Photo-realistic lip-sync from text and also the amazing repository of pix2pix by affinelayer.

Cite as arXiv:1801.01442v1 [cs.CV]

FAQs

• What is target delay for RNN/LSTM?
• Keras implementation of time delayed LSTM?
• Another link for the above