Building CasparCG as a .so

server

#1

Hi to all,
Iam trying to build casparcg under ubuntu 18.04 as a library. My idea is to create a c# server app that startup CasparCG as a external so.

I have been able to build the standard casparCG but when i try to switch it in libcasparcg, building it as .so,i got this errors.

cc1plus: error: /home/daniele/Downloads/casparcg-server-master/build/common/common_pch/stdafx.h.gch/.c++: created and used with different settings of -fpie [-Werror]

Seems that precompiled header doesnt’ want to get fpic that i set for all solution using the cmake option

Use “-fPIC” / “-fPIE” for all targets by default, including static libs

set(CMAKE_POSITION_INDEPENDENT_CODE ON)

Any suggestion?
Regards
Daniele


#2

CasparCG is not designed to be built as a library like this. Even if you do manage to make it build, it will not expose enough of an api to be useful.
A much better and simpler way to achieve what you want will be to simply run the standard casparcg binary as a child process. You can easily monitor the health of that process and restart it or whatever.

There is already a windows only c# launcher you could use as reference https://github.com/rrebuffo/CasparLauncher/ or a nodejs one https://github.com/nrkno/tv-automation-casparcg-launcher


#3

Hi Julusian,
I know that it do not expose enough api, my plan was to add the calls that i need further. But i need to make it a .so at first.

The bad thing is that i have to make caspar in-bound to my app. I would like then to create a Memory producer and consumer in order to integrate caspar in an broadcast automation software. I already have an playout software that need a graphic engine to be bound to it and Caspar was my answer.
Regards
Daniele


#4

Wouldn’t it be easier to use plain CEF instead?


#5

Why can it not just run Caspar? There are a lot of automation software’s that do that. Be aware, that if you integrate CasparCG into your code it could be a breaking of the GPL. If you simply run it side by side, that is not a problem. Or you could also open source your final product, but that is probably not what you want :slight_smile:


#6

Hi didikunz,
I need to run caspar cg in a single app, It will a part of a pipeline and due to performance reason , i need to have only in - process comunication.
Regards
Daniele


#7

Sorry Balte , what do you mean with using plain CEF?
Regards
Daniele


#8

CEF is what CasparCG uses internally to generate HTML graphics: https://en.wikipedia.org/wiki/Chromium_Embedded_Framework

If you are only looking to add graphics and don’t need the other bits of CasparCG it might be easier to use just CEF.