install more recent ffmpeg (#259)

Dockerfile

@@ -50,11 +50,17 @@ ENV PATH="$VIRTUAL_ENV/bin:$PATH"
 COPY --chown=www-data:www-data --from=compile-image /home/mediacms.io /home/mediacms.io
 
 RUN apt-get update -y && apt-get -y upgrade && apt-get install --no-install-recommends \
-    supervisor nginx ffmpeg imagemagick procps -y && \
+    supervisor nginx imagemagick procps wget xz-utils -y && \
     rm -rf /var/lib/apt/lists/* && \
     apt-get purge --auto-remove && \
     apt-get clean
 
+RUN wget -q https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz && \
+    mkdir -p tmp && \
+    tar -xf ffmpeg-release-amd64-static.tar.xz --strip-components 1 -C tmp && \
+    cp -v tmp/ffmpeg tmp/ffprobe tmp/qt-faststart /usr/local/bin && \
+    rm -rf tmp ffmpeg-release-amd64-static.tar.xz 
+
 WORKDIR /home/mediacms.io/mediacms
 
 EXPOSE 9000 80