Thanks you so much @robbt !!! it works prefect now 
How can I force libretime to process the whole db again please?
For those who have the issue under ubuntu 18.04 here is the exact commands:
apt install git
git clone --branch v0.4.0 https://github.com/x42/silan.git
cd silan/
apt install dh-autoreconf autogen libavcodec-dev libavformat-dev libsndfile1-dev
apt install
./autogen.sh
make
make install
apt remove silan
Test:
cd
silan --version
silan -b test.mp3
0.417392 Sound On
202.361224 Sound Off