Dandelion

A secure video chat application

Mac setup

Requirements:

brew install yasm

libx264 (video)

1. git clone http://git.videolan.org/git/x264.git x264
2. ./configure --prefix=/usr/local --enable-shared
3. make
4. sudo make install

libopus (audio)

1. brew install automake
2. git clone git://git.opus-codec.org/opus.git
3. cd opus
4. ./autogen.sh
5. ./configure --enable-static --enable-shared
6. make
7. sudo make install

ffmpeg

1. git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg
2. ./configure  --prefix=/usr/local --enable-gpl --enable-nonfree --enable-libfreetype --enable-libx264 --enable-libopus
3. make
4. sudo make install

SDL2.0

1. https://www.libsdl.org/download-2.0.php
2. ./configure
3. make
4. sudo make install (defaults: /usr/local/lib + /usr/local/include/SDL2 + sdl2-config)

Building

make clean
make

Testing

You can easily test this application by streaming data from your device to a UDP endpoint.

UDP (low bandwidth, much CPU)

ffmpeg -s 640x480 -r 30 -f avfoundation -i "0:0" -c:v libx264 -tune zerolatency -pix_fmt yuv420p -f mpegts udp://127.0.0.1:1234

UDP (high bandwidth, low CPU)

ffmpeg -s 640x480 -r 30 -f avfoundation -i "0:0" -c:v libx264 -tune zerolatency -preset ultrafast -pix_fmt yuv420p -f mpegts udp://127.0.0.1:1234

TCP

ffmpeg -s 640x480 -r 30 -f avfoundation -i "0:0" -c:v libx264 -tune zerolatency -pix_fmt yuv420p -c:a aac -b:a 128k -f mpegts pipe:1 | nc -l -k 51234

Commands

List all devices (video and audio)

ffmpeg -f avfoundation -list_devices true -i ""