ffDiaporama 2.1 for Slackware 15.0 is available here:
https://sourceforge.net/projects/ffdiaporama/
Code:
To start ffDiaporama:
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/ffmpeg21/lib:/opt/lib
export LD_LIBRARY_PATH
ffDiaporama -lang=de
ffDiaporama 2.1 is this one (
http://ffdiaporama.tuxfamily.org/):
ffdiaporama_bin_2.1.2014.0209.tar.gz
It needs ffmpeg21 and x264-152