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add instructions on how to add audio to rpi camera (#1620) (#1388) (#1425) (#1975)

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Alessandro Ros 2023-06-22 12:10:09 +02:00 committed by GitHub
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@ -708,6 +708,46 @@ paths:
All available parameters are listed in the [sample configuration file](/mediamtx.yml). All available parameters are listed in the [sample configuration file](/mediamtx.yml).
In order to add audio from a USB microfone, install GStreamer and alsa-utils:
```sh
sudo apt install -y gstreamer1.0-tools gstreamer1.0-rtsp gstreamer1.0-alsa alsa-utils
```
list available audio cards with:
```sh
arecord -L
```
Sample output:
```
surround51:CARD=ICH5,DEV=0
Intel ICH5, Intel ICH5
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
default:CARD=U0x46d0x809
USB Device 0x46d:0x809, USB Audio
Default Audio Device
```
Find the audio card of the microfone and take note of its name, for instance `default:CARD=U0x46d0x809`. Then use GStreamer inside `runOnReady` to read the video stream, add audio and publish the improved stream to another path:
```yml
paths:
cam:
source: rpiCamera
runOnReady: >
gst-launch-1.0
rtspclientsink name=s location=rtsp://localhost:$RTSP_PORT/cam_with_audio
rtspsrc location=rtsp://127.0.0.1:$RTSP_PORT/$MTX_PATH latency=0 ! rtph264depay ! s.
alsasrc device=default:CARD=U0x46d0x809 ! opusenc bitrate=16000 ! s.
runOnReadyRestart: yes
cam_with_audio:
```
Stream with video and audio will be available in path `/cam_with_audio`.
### From OBS Studio ### From OBS Studio
OBS Studio can publish to the server by using the RTMP protocol. In `Settings -> Stream` (or in the Auto-configuration Wizard), use the following parameters: OBS Studio can publish to the server by using the RTMP protocol. In `Settings -> Stream` (or in the Auto-configuration Wizard), use the following parameters: