如何显示使用 pytube 下载 YouTube 视频的进度？

Question

我去过多个论坛，也阅读过文档。我仍然不明白如何进行这项工作。

如何在下载视频时显示进度？我需要提供参数吗？我看到很多人在做 yt = YouTube(url, on_progress) 时没有括号或参数，所以我很困惑。

我不知道 file_handle 应该是什么，我也不知道在哪里可以得到 bytes_remaining。

提前致谢

def on_progress(stream, chunk, file_handle, bytes_remaining):
    total_size = stream.filesize
    bytes_downloaded = total_size - bytes_remaining
    percentage_of_completion = bytes_downloaded / total_size * 100
    print(percentage_of_completion)


def main():
    chunk_size = 1024
    url = "https://www.youtube.com/watch?v=GceNsojnMf0"
    yt = YouTube(url)
    video = yt.streams.get_highest_resolution()
    yt.register_on_progress_callback(on_progress(video, chunk_size, 'D:\Videos', video.filesize))
    print(f"Fetching \"{video.title}\"..")
    print(f"Fetching successful\n")
    print(f"Information: \n"
          f"File size: {round(video.filesize * 0.000001, 2)} MegaBytes\n"
          f"Highest Resolution: {video.resolution}\n"
          f"Author: {yt.author}")
    print("Views: {:,}\n".format(yt.views))

    print(f"Downloading \"{video.title}\"..")
    video.download('D:\Videos')

Answer 1

来自 YouTube 对象的方法 register_on_progress_callback() 只需要一个回调函数本身而不是函数的结果。您还需要更新函数 on_progress 的参数：方法 register_on_progress_callback() 仅使用三个参数（stream、chunk 和 bytes_remaining）。您可以像这样更新您的代码：

def on_progress(stream, chunk, bytes_remaining):
    total_size = stream.filesize
    bytes_downloaded = total_size - bytes_remaining
    percentage_of_completion = bytes_downloaded / total_size * 100
    print(percentage_of_completion)


def main():
    chunk_size = 1024
    url = "https://www.youtube.com/watch?v=GceNsojnMf0"
    yt = YouTube(url)
    video = yt.streams.get_highest_resolution()
    yt.register_on_progress_callback(on_progress)
    print(f"Fetching \"{video.title}\"..")
    print(f"Fetching successful\n")
    print(f"Information: \n"
          f"File size: {round(video.filesize * 0.000001, 2)} MegaBytes\n"
          f"Highest Resolution: {video.resolution}\n"
          f"Author: {yt.author}")
    print("Views: {:,}\n".format(yt.views))

    print(f"Downloading \"{video.title}\"..")
    video.download('D:\Videos')

main()

如何显示使用 pytube 下载 YouTube 视频的进度？

How to display progress of downloading a YouTube video using pytube?

python

pytube