soimort/you-get

下面这一句if判断里面的or好像不对，我看到bilibili实现中已经有一个正确的streams_sorted选中了720P，但是在extractor.py文件的download（）函数中仍然对Dash视频进行了排序，结果反而选中了480P。

                # Download stream with the best quality
                print('Extractor.download():进入Download stream with the best quality!')
                self.p([])
                from .processor.ffmpeg import has_ffmpeg_installed
                # bug：这里用or导致虽然此时已经有正确streams_sorted,但是仍然重新排序了
                # if has_ffmpeg_installed() and player is None and self.dash_streams or not self.streams_sorted:
                if has_ffmpeg_installed() and player is None and self.dash_streams and not self.streams_sorted:
                    print('Extractor.download():未排序,按size排序')
                    #stream_id = list(self.dash_streams)[-1]
                    itags = sorted(self.dash_streams,
                                   key=lambda i: -self.dash_streams[i]['size'])
                    stream_id = itags[0]
                else:
                    print('Extractor.download():已排序')
                    stream_id = self.streams_sorted[0]['id'] if 'id' in self.streams_sorted[0] else self.streams_sorted[0]['itag']
                print('Extractor.download():选中的是stream_id={}'.format(stream_id))

extractor.py中的排序按size,但是这个视频它480P的比720P的size更大,结果extractor.py文件中的排序就错误了。

site:                Bilibili
title:               GAMES101-现代计算机图形学入门-闫令琪 (P1. Lecture 01 Overview of Computer Graphics)
streams:             # Available quality and codecs
    [ DASH ] ____________________________________
    - format:        dash-flv480
      container:     mp4
      quality:       清晰 480P
      size:          122.3 MiB (128219018 bytes)
    # download-with: you-get --format=dash-flv480 [URL]

    - format:        dash-flv720
      container:     mp4
      quality:       高清 720P
      size:          122.1 MiB (127992296 bytes)
    # download-with: you-get --format=dash-flv720 [URL]

    - format:        dash-flv360
      container:     mp4
      quality:       流畅 360P
      size:          93.1 MiB (97588721 bytes)
    # download-with: you-get --format=dash-flv360 [URL]

    [ DEFAULT ] _________________________________
    - format:        flv720
      container:     flv
      quality:       高清 720P
      size:          120.9 MiB (126785254 bytes)
    # download-with: you-get --format=flv720 [URL]

    - format:        flv480
      container:     flv
      quality:       清晰 480P
      size:          123.0 MiB (128941600 bytes)
    # download-with: you-get --format=flv480 [URL]

    - format:        flv360
      container:     flv
      quality:       流畅 360P
      size:          94.2 MiB (98782390 bytes)
    # download-with: you-get --format=flv360 [URL]