python - Django，使用 FileWrapper (HTML5) 流式传输 H.264 视频

Question

我在尝试使用 FileWrapper 类通过 Django 流式传输 H.264 视频时遇到一个奇怪的问题。我正在使用以下 View 函数:

def mp4(request, path):
  wrapper = FileWrapper(open(path, 'rb'))
  content_type = mimetypes.guess_type(path)[0]
  response = HttpResponse(wrapper, content_type=content_type)
  response['Content-Length'] = os.path.getsize(path)
  return response

函数映射到这个 URL:

  (r'^/mp4/(.*)$', 'mp4'),

我在 HTML5 视频标签中引用 URL:

<video width="560" height="340" controls>
  <source src='/video/mp4//tmp/test.mp4' type='video/mp4 codecs="avc1.42E01E, mp4a.40.2"'>
</video>

但是，当我打开包含视频的页面时，视频无法播放并且 Django 开发服务器发出以下错误:

Traceback (most recent call last):  File "/usr/lib/pymodules/python2.6/django/core/servers/basehttp.py", line 280, in run    self.finish_response()  File "/usr/lib/pymodules/python2.6/django/core/servers/basehttp.py", line 320, in finish_response    self.write(data)  File "/usr/lib/pymodules/python2.6/django/core/servers/basehttp.py", line 416, in write    self._write(data)  File "/usr/lib/python2.6/socket.py", line 300, in write    self.flush()  File "/usr/lib/python2.6/socket.py", line 286, in flush    self._sock.sendall(buffer)error: [Errno 104] Connection reset by peer[05/Dec/2010 13:08:00] "GET /video/mp4//tmp/test.mp4 HTTP/1.1" 200 384329753Traceback (most recent call last):  File "/usr/lib/pymodules/python2.6/django/core/servers/basehttp.py", line 280, in run    self.finish_response()  File "/usr/lib/pymodules/python2.6/django/core/servers/basehttp.py", line 320, in finish_response    self.write(data)  File "/usr/lib/pymodules/python2.6/django/core/servers/basehttp.py", line 416, in write    self._write(data)  File "/usr/lib/python2.6/socket.py", line 300, in write    self.flush()  File "/usr/lib/python2.6/socket.py", line 286, in flush    self._sock.sendall(buffer)error: [Errno 104] Connection reset by peerTraceback (most recent call last):  File "/usr/lib/pymodules/python2.6/django/core/servers/basehttp.py", line 280, in run    self.finish_response()  File "/usr/lib/pymodules/python2.6/django/core/servers/basehttp.py", line 320, in finish_response    self.write(data)  File "/usr/lib/pymodules/python2.6/django/core/servers/basehttp.py", line 416, in write    self._write(data)  File "/usr/lib/python2.6/socket.py", line 300, in write    self.flush()  File "/usr/lib/python2.6/socket.py", line 286, in flush    self._sock.sendall(buffer)error: [Errno 32] Broken pipe

浏览器 Google Chrome 似乎多次尝试检索视频，前两次重置连接，最后一次断开连接。请注意，Django 会返回 200 OK 响应以及正确的视频大小。

这是奇怪的部分:即使视频没有播放，我也可以右键单击播放器控件，选择将视频另存为...，Google Chrome 会很乐意下载整个视频并存储它在本地。然后，我仍然可以在 Google Chrome 中通过使用 file://URL 打开保存的视频来播放它。

我也试过将视频文件放在本地网络服务器上，并在视频标签中引用它，效果也不错。

所以我认为这个问题与 FileWrapper 和/或 Django 使用迭代器处理 HttpResponse 的方式有关。数据在那里，可以使用将视频另存为... 保存，但为什么不能播放？

谢谢!

Answer 1

对于那些在 2019 年(及以后)遇到这个问题的人，答案已经发布 here .