下载优酷视频时出现ValueError: Sign not allowed in string format specifier 错误

系统环境： Android 7.1.2 Termux Python3.6.4 lulu 0.3.2

下载一般睿站视频时亦有可能发生这个问题。

---

输出全文如下

$ lulu -V
lulu: version 0.3.2, a tiny downloader that scrapes the web.
$ lulu -d --format=mp4hd http://v.youku.com/v_show/id_XNjA4MzA1MjY4
[DEBUG] get_content: https://ups.youku.com/ups/get.json?vid=XNjA4MzA1MjY4&ccode=0507&client_ip=192.168.1.1&utid=VxAEE1fOSgYCAa%2BjQ4XPTyNf&client_ts=1518150235
lulu: version 0.3.2, a tiny downloader that scrapes the web.
lulu: Namespace(URL=['http://v.youku.com/v_show/id_XNjA4MzA1MjY4';], cookies=None, debug=True, extractor_proxy=None, force=False, format='mp4hd', help=False, http_proxy=None, info=False, input_file=None, itag=None, json=False, no_caption=False, no_merge=False, no_proxy=False, output_dir='.', output_filename=None, password=None, player=None, playlist=False, socks_proxy=None, stream=None, timeout=600, url=False, version=False)
site: 优酷 (Youku)
title: 龙兄虎弟
stream:
- format: mp4hd
container: mp4
video-profile: 高清
size: 385.39999999999998 MiB (404139132 bytes)
m3u8_url: http://pl.cp12.wasu.tv/playlist/m3u8?vid=XNjA4MzA1MjY4&type=mp4&ups_client_netip=afa34385&utid=VxAEE1fOSgYCAa%2BjQ4XPTyNf&ccode=0507&psid=9b4d4e221d79a349d536e48a9b6f0c98&duration=5869&expire=18000&ups_ts=1518150234&onOff=0&encr=1&ups_key=3392a85de76518cbcf4922cf2c5a0c75
# download-with: lulu --format=mp4hd [URL]

audio-languages:
- lang: 国语
download-url: http://v.youku.com/v_show/id_XNjA4MzA1MjY4

- lang: 粤语
download-url: http://v.youku.com/v_show/id_XNzMyMDUwNDgw

Downloading 龙兄虎弟.mp4 ...
Traceback (most recent call last):
File "/data/data/com.termux/files/usr/bin/lulu", line 11, in <module>
sys.exit(main())
File "/data/data/com.termux/files/usr/lib/python3.6/site-packages/lulu/__main__.py", line 92, in main
main(**kwargs)
File "/data/data/com.termux/files/usr/lib/python3.6/site-packages/lulu/common.py", line 1485, in main
script_main(any_download, any_download_playlist, **kwargs)
File "/data/data/com.termux/files/usr/lib/python3.6/site-packages/lulu/common.py", line 1375, in script_main
**extra
File "/data/data/com.termux/files/usr/lib/python3.6/site-packages/lulu/common.py", line 1121, in download_main
download(url, **kwargs)
File "/data/data/com.termux/files/usr/lib/python3.6/site-packages/lulu/common.py", line 1476, in any_download
m.download(url, **kwargs)
File "/data/data/com.termux/files/usr/lib/python3.6/site-packages/lulu/extractors/youku.py", line 349, in youku_download_by_url
Youku().download_by_url(url, **kwargs)
File "/data/data/com.termux/files/usr/lib/python3.6/site-packages/lulu/extractor.py", line 86, in download_by_url
self.download(**kwargs)
File "/data/data/com.termux/files/usr/lib/python3.6/site-packages/lulu/extractor.py", line 302, in download
av=stream_id in self.dash_streams
File "/data/data/com.termux/files/usr/lib/python3.6/site-packages/lulu/common.py", line 802, in download_urls
bar.update()
File "/data/data/com.termux/files/usr/lib/python3.6/site-packages/lulu/common.py", line 651, in update
self.current_piece, self.total_pieces, self.speed
ValueError: Sign not allowed in string format specifier