从youtube下载flv格式的视频。

时间:2010-11-26 18:34:19

标签: python download youtube urllib2

我真的不明白youtube如何提供视频,但我一直在阅读我的能力,似乎旧的方法get_video现在已经过时,不能再使用了因为这个我问的是否有另一个用于收集YouTube视频的pythonic和简单方法。

3 个答案:

答案 0 :(得分:15)

youtube-dl

可能会有运气

http://rg3.github.com/youtube-dl/documentation.html

我不确定是否有一个好的API,但它是用Python编写的,所以理论上你可以做一些比Popen更好的事情:)

答案 1 :(得分:6)

这是一个下载Youtube视频的快速Python脚本。没有花里胡哨,只需擦除必要的网址,点击generate_204网址,然后将数据流式传输到文件中:

import lxml.html
import re
import sys
import urllib
import urllib2

_RE_G204 = re.compile('"(http:.+.youtube.com.*\/generate_204[^"]+")', re.M)
_RE_URLS = re.compile('"fmt_url_map": "(\d*[^"]+)",.*', re.M)

def _fetch_url(url, ref=None, path=None):
    opener = urllib2.build_opener()
    headers = {}
    if ref:
        headers['Referer'] = ref
    request = urllib2.Request(url, headers=headers)
    handle = urllib2.urlopen(request)
    if not path:
        return handle.read()
    sys.stdout.write('saving: ')
    # write result to file
    with open(path, 'wb') as out:
        while True:
            part = handle.read(65536)
            if not part:
                break
            out.write(part)
            sys.stdout.write('.')
            sys.stdout.flush()
        sys.stdout.write('\nFinished.\n')

def _extract(html):
    tree = lxml.html.fromstring(html)
    res = {'204': _RE_G204.findall(html)[0].replace('\\', '')}
    for script in tree.findall('.//script'):
        text = script.text_content()
        if 'fmt_url_map' not in text:
            continue
        # found it, extract the urls we need
        for tmp in _RE_URLS.findall(text)[0].split(','):
            url_id, url = tmp.split('|')
            res[url_id] = url.replace('\\', '')
        break
    return res

def main():
    target = sys.argv[1]
    dest = sys.argv[2]
    html = _fetch_url(target)
    res = dict(_extract(html))
    # hit the 'generate_204' url first and remove it
    _fetch_url(res['204'], ref=target)
    del res['204']
    # download the video. now i grab the first 'download' url and use it.
    first = res.values()[0]
    _fetch_url(first, ref=target, path=dest)

if __name__ == '__main__':
    main()

运行它:

python youdown.py 'http://www.youtube.com/watch?v=Je_iqbgGXFw' stevegadd.flv
saving: ........................... finished.

答案 2 :(得分:4)

我建议使用urllib2或beautifulsoup编写自己的解析器。您可以查看DownThemAll的源代码,了解该插件如何找到视频网址