Use ffmpeg-shared-sc.inc for building a shared ffmpeg 
within a self contained app.

Delete the tmp directory in the resulting package, those files are only used
to build against and are not needed for runtime.

Also, a wrapper script like below  is needed to use ffmpeg.  

###################
#!/bin/sh

export LD_LIBRARY_PATH="/path/containting/libs"

/apps/ffmpeg-shared/bin/ffmpeg "$@"
###################