obs-ios-camera-source for linux

(tested on ubuntu 20.04)

this repository is originally cloned from https://github.com/wtsnz/obs-ios-camera-source it's only have releases for windows and mac. but this fork https://github.com/dougg3/obs-ios-camera-source have linx support but it's also not bulding in ubuntu 20.04. I made this to compile obs-ios-camera plugin on ubuntu 20.04

I have to install

apt install ffmpeg
apt-get install cmake
apt-get install g++
apt-get install libobs0
apt-get install libobs-dev
apt-get install libavcodec-dev
apt install qtbase5-dev

changes

Changed 
external/FindLibObs.cmake

Add(from https://github.com/Palakis/obs-ndi/blob/ac0a3be1709c18a92a381e480d3ceae5e2dd2b22/external/ObsPluginHelpers.cmake)
external/ObsPluginHelpers.cmake

Compile

mkdir build
cd build
cmake .. -DLIBOBS_INCLUDE_DIR=../cmake
make -j4

After doing this, I manually created the directory structure for the plugin and put it in ~/.config/obs-studio/plugins:

mkdir -p ~/.config/obs-studio/plugins
cd ~/.config/obs-studio/plugins
mkdir -p obs-ios-camera-source/data/locale/
touch obs-ios-camera-source/data/locale/en-US.ini 
mkdir -p obs-ios-camera-source/bin/64bit/

cp build/obs-ios-camera-source.so ~/.config/obs-studio/plugins/obs-ios-camera-source/bin/64bit/

============== Use your iPhone camera as a video source in OBS Studio and stream high quality video from your iPhone's camera over USB.

To use this you use the accompanying iOS app to begin streaming in OBS.