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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"grpc streaming example crashes and hangs","articleBody":"Just cloned the latest repo for grpc -\nrunning this on Raspbian (Raspberry Pi)\n\nCannot even break out of the program at all.\nThe sample rate of my usb mic is limited to 44100 and 48000.  I tried changing those in the example but I get the same results.\n\nI have pyaudio installed up to date.\nSound recording and playback both work with pyaudio.\n\nThe  ~/.asoundrc script is here:\n\n```\npcm.!default {\n    type asym\n    playback.pcm \"hw:0,0\"\n    capture.pcm \"hw:1,1\"\n}\n\n# pcm.!default {\n#        type hw\n#        card 0\n# }\n\nctl.!default {\n        type hw\n        card 0\n}\n\n#pcm.record {\n#    type plug;\n#    slave {\n#        pcm \"hw 1,1\"\n#    }\n# }\n```\n\nHere is the output of the program.\n\n```\n(grpc) pi@raspberrypi:~/python-docs-samples/speech/grpc $ python transcribe_streaming.py\nALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave\nALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear\nALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe\nALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side\nALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi\nALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi\nALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem\nALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem\nALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline\nALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline\nALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Connection refused\n\nALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Connection refused\n\nALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave\nCannot connect to server socket err = No such file or directory\nCannot connect to server request channel\njack server is not running or cannot be started\nException in thread Thread-2:\nTraceback (most recent call last):\n  File \"/usr/lib/python2.7/threading.py\", line 810, in __bootstrap_inner\n    self.run()\n  File \"/usr/lib/python2.7/threading.py\", line 763, in run\n    self.__target(*self.__args, **self.__kwargs)\n  File \"/home/pi/gopigo/Projects/Awareness/voice/python-docs-samples/speech/grpc/grpc/local/lib/python2.7/site-packages/grpc/_channel.py\", line 184, in consume_request_iterator\n    for request in request_iterator:\n  File \"transcribe_streaming.py\", line 112, in request_stream\n    data = audio_stream.read(chunk)\n  File \"/home/pi/gopigo/Projects/Awareness/voice/python-docs-samples/speech/grpc/grpc/local/lib/python2.7/site-packages/pyaudio.py\", line 608, in read\n    return pa.read_stream(self._stream, num_frames, exception_on_overflow)\nIOError: [Errno -9981] Input overflowed\n```\n","author":{"url":"https://github.com/thecloudist","@type":"Person","name":"thecloudist"},"datePublished":"2016-09-12T19:28:57.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":17},"url":"https://github.com/515/python-docs-samples/issues/515"}