i'm building vlc from source on rh9.0 and getting the following message
checking for FFMPEG... Package libavcodec was not found in the pkg-config search path.
Perhaps you should add the directory containing `libavcodec.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libavcodec' found
no
checking ffmpeg/avcodec.h usability... no
checking ffmpeg/avcodec.h presence... no
checking for ffmpeg/avcodec.h... no
configure: error: Missing header file ffmpeg/avcodec.h.
what are the neccesary steps?