Use ffmpeg on OSX Xcode Project for Mac - xcode

Question

I am planning to create a new app for personal use on my Mac that uses FFMPEG library, to store a feed from a RTSP IP camera.
Following this official installation procedure from FFMPEG I have manage to successfully achieve the following 2 steps:
To get ffmpeg for OS X, you first have to install ​Homebrew. If you don't want to use Homebrew, see the section below.
ruby -e "$(curl -fsSL
https://raw.githubusercontent.com/Homebrew/install/master/install)"
Then:
- brew install automake fdk-aac git lame libass libtool libvorbis
libvpx \ opus sdl shtool texi2html theora wget x264 xvid yasm
Question:
My question here because I am confused, is how to import a library into Xcode so I can use it in the application I am about to build for my Mac. I can see plenty of GitHub projects related to FFMPEG with IOS/Android, but none for OSX.
All the FFMPEG commands under terminal are working fine, such as converting a video etc.

Answer 1

If you look in /usr/local/Cellar/ffmpeg you will find the actual ffmpeg package and everything in homebrew is just symbolic links to that. For example:
/usr/local/bin/ffmpeg -> ../Cellar/ffmpeg/3.0.2/bin/ffmpeg
Now, if you stay in that directory and do this, you will find all the pkgconfig configuration settings for the constituent parts of ffmpeg:
find . -name \*.pc
./lib/pkgconfig/libavcodec.pc
./lib/pkgconfig/libavdevice.pc
./lib/pkgconfig/libavfilter.pc
./lib/pkgconfig/libavformat.pc
./lib/pkgconfig/libavresample.pc
./lib/pkgconfig/libavutil.pc
./lib/pkgconfig/libpostproc.pc
./lib/pkgconfig/libswresample.pc
./lib/pkgconfig/libswscale.pc
That means you can now find the include path and library paths that you need to put in the Xcode settings. So, for example, if you want the includes for libavutil, you can do:
pkg-config --cflags libavutil
and it will tell you:
-I/usr/local/Cellar/ffmpeg/3.0.2/include
If you want the library settings for libavfilter, you can do:
pkg-config --libs libavfilter
and it will tell you
-L/usr/local/Cellar/ffmpeg/3.0.2/lib -lavfilter
So that is how you get the settings for the compiler/linker. Then you need to put them into Xcode, and I have described that here - look at the bit with the yellow, red and blue boxes.
Hope that helps. Oh, you need to do:
brew install pkg-config
first to get the pkgconfig binary.

Answer 2

In general, you need to configure the Xcode target build settings to add /usr/local/include to the Header Search Path.
Then your #include <ffmpeg.h> (or whatever it's called) will start to work.
Then for linking to libffmpeg.a (or whatever it's called), you can do one of two things:
Add the file to the Additional Libraries and Frameworks of the build settings (selecting it via a file open dialog).
Add /usr/local/lib to the Library Search Paths and -lffmpeg to the Other Linker Flags.
(1. is better if you ask me).
I use Macports, so for me the paths are /opt/local/{include,lib} however with Homebrew there might be an additional level of directory (like /usr/local/ffmpeg/{include,lib}, but you should be able to work that out yourself.
I won't go into details of how to actually use FFMPEG as that is way too involved (and I know nothing about it).

Answer 3

Although this does not answer the specific question here ("how to import such and such libraries"),
for anyone googling here, these days to use FFmpeg in OSX you just
Use the famous import script of Kewlbear
which you can easily find here
https://github.com/kewlbear/FFmpeg-iOS-build-script
and which does everything.
It is a huge amount of non-trivial work maintaining such a build script, and fortunately there's someone who does that work on an ongoing basis.