I prepared  the PPSSPP package for building bundled FFMpeg
libraries (3.0.2, currently) in case of incompatibility with that one
Bundled FFmpeg libraries are recompiled at every package rebuild as
shared private libs according to the scripts pre-configured by Upstream,
and are filtered to avoid conflicts with system ffmpeg.
Please, let me know if anything is wrong for you.
GPG key: 0x29FBC85D7A51CC2F
GPG key server: https://keys.gnupg.net/