[FFmpeg-user] error build ffmpeg

[Boris Eloshvili]

ERROR: libass not found using pkg-config
Note: When building a static binary, add --pkg-config-flags="--static".

If you think configure made a mistake, make sure you are using the latest
version from Git.  If the latest version fails, report the problem to the
ffmpeg-user at ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solve the problem.
CMakeFiles/ffmpeg.dir/build.make:122: recipe for target
'ffmpeg-prefix/src/ffmpeg-stamp/ffmpeg-configure' failed
make[4]: *** [ffmpeg-prefix/src/ffmpeg-stamp/ffmpeg-configure] Error 1
make[4]: Leaving directory '/tmp/sffmpeg/build'
CMakeFiles/Makefile2:255: recipe for target 'CMakeFiles/ffmpeg.dir/all'
failed
make[3]: *** [CMakeFiles/ffmpeg.dir/all] Error 2
make[3]: Leaving directory '/tmp/sffmpeg/build'
Makefile:76: recipe for target 'all' failed
make[2]: *** [all] Error 2
make[2]: Leaving directory '/tmp/sffmpeg/build'
Makefile:2: recipe for target 'sffmpeg' failed
make[1]: *** [sffmpeg] Error 2
make[1]: Leaving directory '/tmp/sffmpeg'
dh_auto_build: make -j1 returned exit code 2
debian/rules:4: recipe for target 'binary' failed
make: *** [binary] Error 2
dpkg-buildpackage: erreur: fakeroot debian/rules binary a produit une
erreur de sortie de type 2
debuild: fatal error at line 1376:
dpkg-buildpackage -rfakeroot -D -us -uc -i -b failed
Makefile:13: recipe for target 'deb' failed
make: *** [deb] Error 29