aist_downloader.py

# coding=utf-8
# Copyright 2020 The Google AI Perception Team Authors.
#
# 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.
"""Download AIST++ videos from AIST Dance Video Database website.

Be aware: Before running this script to download the videos, you should have read
the Terms of Use of the AIST Dance Video Database here:

https://aistdancedb.ongaaccel.jp/terms_of_use/
"""
import argparse
import multiprocessing
import os
import sys
import urllib.request
from functools import partial

SOURCE_URL = 'https://aistdancedb.ongaaccel.jp/v1.0.0/video/10M/'
LIST_URL = 'https://storage.googleapis.com/aist_plusplus_public/20121228/video_list.txt'


def _download(video_url, download_folder):
    save_path = os.path.join(download_folder, os.path.basename(video_url))
    if os.path.exists(save_path):
        return
    urllib.request.urlretrieve(video_url, save_path)


if __name__ == '__main__':
    parser = argparse.ArgumentParser(
        description='Scripts for downloading AIST++ videos.')
    parser.add_argument(
        '--download_folder',
        type=str,
        required=True,
        help='where to store AIST++ videos.')
    parser.add_argument(
        '--num_processes',
        type=int,
        default=1,
        help='number of threads for multiprocessing.')
    args = parser.parse_args()

    ans = input(
        "Before running this script, please make sure you have read the <Terms of Use> "
        "of AIST Dance Video Database at here: \n"
        "\n"
        "https://aistdancedb.ongaaccel.jp/terms_of_use/\n"
        "\n"
        "Do you agree with the <Terms of Use>? [Y/N]"
    )
    if ans in ["Yes", "YES", "yes", "Y", "y"]:
        pass
    else:
        print("Program exit. Please first acknowledge the <Terms of Use>.")
        exit()

    os.makedirs(args.download_folder, exist_ok=True)

    seq_names = urllib.request.urlopen(LIST_URL)
    seq_names = [seq_name.strip().decode('utf-8') for seq_name in seq_names]
    video_urls = [
        os.path.join(SOURCE_URL, seq_name + '.mp4') for seq_name in seq_names]

    download_func = partial(_download, download_folder=args.download_folder)
    pool = multiprocessing.Pool(processes=args.num_processes)
    for i, _ in enumerate(pool.imap_unordered(download_func, video_urls)):
        sys.stderr.write('\rdownloading %d / %d' % (i + 1, len(video_urls)))
    sys.stderr.write('\ndone.\n')