Use debian’s fftw3f

Dockerfile

@@ -18,27 +18,12 @@ RUN apt-get -y install \
         build-essential \
         wget
 
-# required for DCTFilter
-RUN cd /tmp \
-    && wget http://www.fftw.org/fftw-3.3.8.tar.gz \
-    && tar xvf fftw-3.3.8.tar.gz \
-    && cd fftw-3.3.8 \
-    && ./configure \
-        --enable-shared \
-        --enable-threads \
-        --enable-openmp \
-        --enable-sse2 \
-        --enable-avx2 \
-        --enable-float \
-    && make -j 4 install \
-    && cd .. \
-    && rm -rf fftw-3.3.8
-
 # Vapoursynth plugin build dependencies
 RUN apt-get -y install \
         autoconf \
         cargo \
         git \
+        libfftw3-dev \
         libplacebo-dev \
         libtool \
         meson \