pure python mjpeg streaming?

Question

I tried the mjpegStreamServer from here but it doesn't seems to work...

First of all, most times, after run it throws errors:

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Exception in thread Thread-1:
Traceback (most recent call last):
File “/usr/lib/python2.7/threading.py”, line 552, in __bootstrap_inner
self.run()
File “stream2.py”, line 93, in run
self.camera.stop_preview()
AttributeError: ‘ImageProcessor’ object has no attribute ‘camera’

HTTP server started…

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In that case HTTP server doesn’t respond with anything, but throws exception on connection:

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0.0.0.0 – – [23/Jul/2015 18:52:50] “GET /1.mjpeg HTTP/1.1″ 200 –
—————————————-
Exception happened during processing of request from (‘217.153.167.44′, 60365)
Traceback (most recent call last):
File “/usr/lib/python2.7/SocketServer.py”, line 593, in process_request_thread
self.finish_request(request, client_address)
File “/usr/lib/python2.7/SocketServer.py”, line 334, in finish_request
self.RequestHandlerClass(request, client_address, self)
File “/usr/lib/python2.7/SocketServer.py”, line 649, in __init__
self.handle()
File “/usr/lib/python2.7/BaseHTTPServer.py”, line 340, in handle
self.handle_one_request()
File “/usr/lib/python2.7/BaseHTTPServer.py”, line 328, in handle_one_request
method()
File “stream2.py”, line 139, in do_GET
stream = ImageProcessor.getInstance().getStream()
File “stream2.py”, line 122, in getStream
return self.buffer.get()
File “stream2.py”, line 29, in get
return self.data[-1]
IndexError: deque index out of range
—————————————-

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But sometimes it does start correctly, but… when trying to see mjpeg on Chrome, it sends something forever, freezing raspberry… and nothing shows up… in log it looks like this:

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HTTP server started…
Camera interface started…
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:00] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:01] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:01] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:01] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:01] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:01] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:01] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:01] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:01] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:01] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:01] “GET /1.mjpeg HTTP/1.1″ 200 –
0.0.0.0 – – [23/Jul/2015 18:58:01] “GET /1.mjpeg HTTP/1.1″ 200 –
(…)

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Any help?

Answer 1

I was looking for the same thing earlier today so I just wrote an example, that's located here: https://gist.github.com/smerkousdavid/c994956b45b000eac4275939b6a6c78d. It allows three interfaces so adding it to the raspberrypi shouldn't be too difficult. Depending on what camera you're using you can select which interface you are going to use, such as pycamera I would create a BytesIO() object and save the image to that then on the MjpgServer class access the pull method with like so

def pull():
  return True, bytearray(picamstream.getvalue(), 'utf8')

Just remember that when using PiCamera don't have the capture loop within the pull method. If you want to hardcode it into the MjpgServer that might be easier here is another SO post that might help you out on getting that stream: https://stackoverflow.com/questions/24947322/bytesio-stream-to-numpy-arrays-picamera