Question / Help Does not build

[Duesentrieb]

When I try to build OBS from source the
"cmake .. && make -j"

leades to many fatal errors on high sierra 10.13.6 like:
/Users/XXX/obs-studio/obs-studio/deps/media-playback/media-playback/media.c:150:3: error:
implicit declaration of function 'av_packet_ref' is invalid in C99
[-Werror,-Wimplicit-function-declaration]
av_packet_ref(&new_pkt, &pkt);
^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make[2]: *** [deps/media-playback/CMakeFiles/media-playback.dir/media-playback/media.c.o] Error 1
make[1]: *** [deps/media-playback/CMakeFiles/media-playback.dir/all] Error 2
make: *** [all] Error 2

I have no idea how to prevent this. Any suggestion?

 

[Z400Racer37]

Any progress on this issue anyone? Currently having the same issue on 10.14.6.

Thanks in advance.