undefined reference to `function_name'

[Kofr]

I am trying to make my project to work with FFMPEG build from sources. I have several builds in some locations on machine.
I include paths for libs /usr/local/include/ but for some reason it looks in
/home/ilia/ffmpeg_sources/ffmpeg/libavcodec/libtheoraenc.c:175: error: undefined reference to ``th_info_init'
Where wrong paths can be written in System (ubuntu 14.04 - x64)?
.pro screen
.cpp screen

[p3c0]

@Kofr If you know the exact library try adding it from QtCreator as per this.
Or you can try adding environment variable "LD_LIBRARY_PATH" with new path in Build Environment.

[SGaist]

Hi,

If you are are using ffmpeg, why are you including vorbis in your main.cpp ?

Also, why link to all the dependencies of ffmpeg ?