Key Features • Build Instructions • Screenshot • Credits • What did I learn? • License

• Captures webcam frames and encodes them to JPEG
• Transmits video frames using UDP sockets
• Decodes incoming frames and displays them in real time
• Peer-to-peer connection without a central server

This project uses vcpkg for dependency management.

Required libraries:

• OpenCV – webcam capture & video rendering
• PortAudio – audio capture/playback
• Opus – audio compression codec
• [Winsock2 / BSD sockets] – UDP networking

1. Install CMake.
2. Install vcpkg and integrate it with CMake:

   git clone https://github.com/microsoft/vcpkg
   cd vcpkg
   bootstrap-vcpkg.bat   # Windows
   ./bootstrap-vcpkg.sh  # Linux 
   

Then install dependencies:

vcpkg install opencv portaudio opus

3. Clone this repo and build:

git clone https://github.com/fludar/p2p-video-call
cd p2p-video-call
cmake -B build -S . -DCMAKE_TOOLCHAIN_FILE=C:/vcpkg/scripts/buildsystems/vcpkg.cmake
cmake --build build

Here I used OBS for a virtual webcam since I didn't have a webcam at the momment.

• OpenCV – for video capture, JPEG encoding/decoding, and display
• PortAudio – for cross-platform audio input/output
• Opus – for real-time audio compression and decompression
• Winsock2 – for UDP networking on Windows
• BSD sockets – for networking on Linux/macOS
• vcpkg – for dependency management and easy CMake integration

• Basics of capturing and encoding video frames using OpenCV
• Sending and receiving raw UDP packets
• Simple audio capture and playback with PortAudio and Opus
• Multi-threading and synchronization with mutexes and atomic flags
• Handling low-level networking and socket programming in C++
• Error handling and resource management in multimedia applications

This project is licensed under the MIT License – see the LICENSE file for details.