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# Preprocessing [Youtube-VOS](https://youtube-vos.org/dataset/download)
### Download raw images and annotations ([website](https://youtube-vos.org/dataset/download), 8.3G)
````shell
python download_from_gdrive.py https://drive.google.com/uc?id=18S_db1cFgSD1RsMsofJLkd6SyR9opk6a --output train.zip
unzip ./train.zip
python parse_ytb_vos.py # really slow
````
### Crop & Generate data info (10 min)
````shell
#python par_crop.py [crop_size] [num_threads]
python par_crop.py 511 12
python gen_json.py
````
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