I downloaded both faac and libmp4v2 from SlackBuilds v. 14.0. Before I compiled faac I installed libmp4v2. However the patch provided with script for faac doesn't seem to work. Here what said config
checking wether MP4Create is declared ... yes
checking for MP4MetaDataDelete is declared ... no
configure: *** Building WITHOUT mp4v2 ***
I looked for 'MP4MetaDataDelete' in header files for mp4v2 library, but I didn't find it. So I suspect that the version 2.0.0 of mp4v2 library is wrong....?