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iizukanao / picam-streamer

Out-of-the-box SD card image for live streaming with Raspberry Pi
MIT License
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adafruit I2S mic SPH0645 SUPPORT #30

Closed rajeshkrarora1 closed 5 years ago

rajeshkrarora1 commented 6 years ago

I'am trying to use adafruit I2S mic SPH0645 for audio input to PICAM-STREAMER on raspberrypi zero w with V2 official camera with no success, video stream works perfectly but with no audio, though i have tweaked the audio settings as per the instructions

rajeshkrarora1 commented 6 years ago

first of all let me thankyou for this wonderful project, it works fine on my pi zero w, but without audio, I downloaded the picam-streamer image from http://s.kyu-mu.net/picam-streamer-latest/ link, added wpa_supplicant and ssh to run it wirelessly, i have followed the instructions at https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout/raspberry-pi-wiring-and-test to install SPH0645 i2s mic by adafruit support on my pizero as a root, i have altered values in .asoundrc as per http://www.codingmama.io/tutorials/audio-streaming-with-raspberry-pi-zero-w-and-adafruits-i2s-mic, https://github.com/iizukanao/picam/issues/86, nothing is working for audio, i stopped "picam", installed vlc, and streamed audio using cvlc as per http://www.codingmama.io/tutorials/audio-streaming-with-raspberry-pi-zero-w-and-adafruits-i2s-mic, it works fine but i'am unable to stream audio and video together, if i use "./picam -w 640 -h 480 --alsadev plug:dmic_sv -r 44100 --verbose --rtspout -v 500000 -f 20 --autoex" command, i get an error "error: failed to set camera to idle state Perhaps another program is using camera, otherwise you need to reboot this pi". If i pkill the "picam" process and then use above command it says "error: failed to connect to video data socket /tmp/node_rtsp_rtmp_videoData): Connection refused perhaps RTSP server (https://github.com/iizukanao/node-rtsp-rtmp-server) is not running?, actually i do not have a clue how to I install and compile all of the modules needed to use with "picam", cou;ld you please help

rajeshkrarora1 commented 6 years ago

hardware is Adafruit I2S MEMS Microphone Breakout - SPH0645LM4H [ADA3421

Damel91 commented 6 years ago

I have adafruit microphones too, but I'm using them stereo, now the thing is that the standard adafruit asoundrc configuration is not compatible with streaming because it uses S32_LE format by default, so you need to use alsa plug-in in order to have a linear conversion, in this way the alsa module will adapt automatically to the need of the stream. Anyway, this is my asoundrc configuration file

NOTE: Take care of two things, first, the mono configuration will result into audio non synched, two, this issue doesn't mean anything with picam sofware itself:

pcm_slave.sl2 { pcm "plughw:1,0" format S32_LE rate 48000 }

pcm.!default { type rate slave sl2 }

ctl:!default { type rate slave sl2 }

Now your device will be "default", also think about that the virtual soundcard module for the i2s microphones create an overhead, so this is the reason because I'm not using something that can me let adjust the volume, I suggest to you to use picam command instead.

Damel91 commented 6 years ago

I don't use the picam streamer, so you also need to configure your alsa input device

rajeshkrarora1 commented 6 years ago

Thanks for a prompt response, i have asoundrc at ~/.asoundrc, and without picam-streamer. i tried audio streaming which worked fine with my asoundrc looking like this pcm.dmic_hw { type hw card sndrpisimplecar channels 2 format S32_LE } pcm.dmic_sv { type softvol slave.pcm dmic_hw control { name "Boost Capture Volume" card sndrpisimplecar } min_dB -2.0 max_dB 10.0 }

rajeshkrarora1 commented 6 years ago

i have not understood where to place .asoundrc in "picam-streamer" so that picam-streamer uses the adafruit i2s mems mic and streams audio/video together

rajeshkrarora1 commented 6 years ago

i have made my asoundrc look like yours and rebooted with no success, could you please suggest where should i place my .asoundrc, because at ~/.asoundrc it is not working with picam-streamer

Damel91 commented 6 years ago

the ~/.asoundrc is a configuration file used by the alsa driver, it is located into the home directory. I don't know how to confugure picam-streamer because I use the picam software, not the streamer, but it should work, try to open an issue referring about how to select the input device.

rajeshkrarora1 commented 6 years ago

Thanks Dave4675 for this clue, god bless

On Sat, Nov 3, 2018 at 6:30 AM Dave4675 notifications@github.com wrote:

the ~/.asoundrc is a configuration file used by the alsa driver, it is located into the home directory. I don't know how to confugure picam-streamer because I use the picam software, not the streamer. but it should work, try to open an issue referring about how to select the input device.

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