+- deblock filter
+- tmix filter
+- amplify filter
+- fftdnoiz filter
+- aderivative and aintegral audio filters
+- pal75bars and pal100bars video filter sources
+- support mbedTLS based TLS
+- adeclick filter
+- adeclip filter
+- libtensorflow backend for DNN based filters like srcnn
+- vc1 decoder is now bit-exact
+- ATRAC9 decoder
+- lensfun wrapper filter
+- colorconstancy filter
+- AVS2 video decoder via libdavs2
+
+
+version 4.0: