libpeer - Portable WebRTC Library for IoT/Embedded Device

libpeer is a WebRTC implementation written in C, developed with BSD socket. The library aims to integrate IoT/Embedded device video/audio streaming with WebRTC, such as ESP32 and Raspberry Pi

Features

• Video/Audio Codec
  • H264
  • G.711 PCM (A-law)
  • G.711 PCM (µ-law)
  • OPUS
• DataChannel
• STUN/TURN
• IPV4/IPV6
• Signaling
  • WHIP
  • MQTT

Dependencies

• mbedtls
• libsrtp
• usrsctp
• cJSON
• coreHTTP
• coreMQTT

Getting Started with Generic Example

• Copy URL from the test website
• Build and run the example

$ sudo apt -y install git cmake wget ffmpeg
$ git clone --recursive https://github.com/sepfy/libpeer
$ cd libpeer
$ cmake -S . -B build && cmake --build build
$ wget -O sample.mp4 \
    https://download.samplelib.com/mp4/sample-30s.mp4
$ ffmpeg -i sample.mp4 \
    -map 0:v:0 -vf fps=25 -c:v libx264 -profile:v baseline -pix_fmt yuv420p \
    -x264-params bframes=0:keyint=25:min-keyint=25:scenecut=0:repeat-headers=1 \
    -f h264 test.264 \
    -map 0:a:0 -ac 1 -ar 8000 -c:a pcm_alaw -f wav test.wav
$ ./build/examples/generic/sample -u <URL>

• Click Connect button on the website

Examples for Platforms

• ESP32: MJPEG over datachannel
• PICO: Ping pong with datachannel
• Raspberry Pi: Video and two-way audio stream