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我正在做一个关于制作定制媒体播放器的学校项目。我在网上有一些我一直在使用的源代码。我想添加另一个新功能，即制作源代码没有的播放列表。

但是，当我尝试拖动窗口时，我遇到了一个错误，即窗口“停止响应”。我无法单击任何内容，因为我的光标显示“加载标志”（圆形光标），似乎有一些背景踏板正在运行。

我试过让它运行而不拖动它，它似乎工作正常。

你们有谁知道为什么当我使用函数“time.sleep(second)”时会出现这个问题？

参考： http: //www.blog.pythonlibrary.org/2010/07/24/wxpython-creating-a-simple-media-player/

逻辑（代码）：

def load_playlist(self, event):
    playlist = ["D:\Videos\test1.mp4", "D:\Videos\test2.avi"]
    for path in playlist:
        #calculate each media file duration
        ffmpeg_command = ['C:\\MPlayer-rtm-svn-31170\\ffmpeg.exe', '-i' , path]

        pipe = subprocess.Popen(ffmpeg_command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
        results = pipe.communicate()

        #Regular expression to get the duration
        length_regexp = 'Duration: (\d{2}):(\d{2}):(\d{2})\.\d+,'
        re_length = re.compile(length_regexp)

        # find the matches using the regexp that to compare with the buffer/string
        matches = re_length.search(str(results))
        #print matches

        hour = matches.group(1)
        minute = matches.group(2)
        second = matches.group(3)

        #Converting to second
        hour_to_second = int(hour) * 60 * 60
        minute_to_second = int(minute) * 60
        second_to_second = int(second)

        num_second = hour_to_second + minute_to_second + second_to_second
        print num_second

        #Play the media file
        trackPath = '"%s"' % path.replace("\\", "/")
        self.mplayer.Loadfile(trackPath)

        #Sleep for the duration of second(s) for the video before jumping to another video
        time.sleep(num_second)
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1 回答 1

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The problem is that time.sleep() blocks wxPython's main loop so it cannot update, thus it appears unresponsive. If you need to insert a break between videos, then you should use a wx.Timer instead. Otherwise, you'll need to look into using threads.

Here's a tutorial on wx.Timer: http://www.blog.pythonlibrary.org/2009/08/25/wxpython-using-wx-timers/

You would basically create a timer, turn it on at the end of the end of your method and when it finishes, it will fire an event which you can use to load the next video. Or you can use wx.CallLater(numOfMillSec, self.loadVideo)

于 2012-12-05T14:26:56.723 回答