diff --git a/ffmpeg3.spec b/ffmpeg3.spec
index aacd958..e2be7f7 100644
--- a/ffmpeg3.spec
+++ b/ffmpeg3.spec
@@ -9,7 +9,7 @@
 Name:          ffmpeg3
 Epoch:         1
 Version:       3.2.4
-Release:       2mamba
+Release:       3mamba
 Summary:       Hyper fast MPEG1/MPEG4/H263/RV and AC3/MPEG audio encoder
 Group:         System/Libraries
 Vendor:        openmamba
@@ -102,6 +102,7 @@ Preset configuration files used by libavcodec.
 %package -n libswscale-ffmpeg3
 Summary:   ffmpeg video scaling library
 Group:     System/Libraries
+Obsoletes: libswscale-libav
 
 %description -n libswscale-ffmpeg3
 ffmpeg video scaling library.
@@ -119,6 +120,7 @@ This package contains the header files and static libraries needed to compile ap
 %package -n libswresample-ffmpeg3
 Summary:   ffmpeg resampling library
 Group:     System/Libraries
+Obsoletes: libswresample-libav
 
 %description -n libswresample-ffmpeg3
 ffmpeg resampling library.
@@ -137,6 +139,7 @@ This package contains the header files and static libraries needed to compile ap
 Summary:   ffmpeg library implementing various Audio/Video codecs
 Group:     System/Libraries
 Requires:  ffmpegpresets
+Obsoletes: libavcodec-libav
 
 %description -n libavcodec-ffmpeg3
 ffmpeg library implementing various Audio/Video codecs.
@@ -153,6 +156,7 @@ This package contains the header files and static libraries needed to compile ap
 %package -n libavdevice-ffmpeg3
 Summary:   ffmpeg device handling library
 Group:     System/Libraries
+Obsoletes: libavdevice-libav
 
 %description -n libavdevice-ffmpeg3
 ffmpeg device handling library.
@@ -170,6 +174,7 @@ This package contains the header files and static libraries needed to compile ap
 %package -n libavfilter-ffmpeg3
 Summary:   ffmpeg filtering library
 Group:     System/Libraries
+Obsoletes: libavfilter-libav
 
 %description -n libavfilter-ffmpeg3
 ffmpeg filtering library.
@@ -187,6 +192,7 @@ This package contains the header files and static libraries needed to compile ap
 %package -n libavformat-ffmpeg3
 Summary:   ffmpeg format library
 Group:     System/Libraries
+Obsoletes: libavformat-libav
 
 %description -n libavformat-ffmpeg3
 ffmpeg format library.
@@ -204,6 +210,7 @@ This package contains the header files and static libraries needed to compile ap
 %package -n libavutil-ffmpeg3
 Summary:   Shared library part of ffmpeg
 Group:     System/Libraries
+Obsoletes: libavutil-libav
 
 %description -n libavutil-ffmpeg3
 Shared library part of ffmpeg
@@ -222,6 +229,7 @@ This package contains the header files and static libraries needed to compile ap
 %package -n libpostproc-ffmpeg3
 Summary:   Video postprocessing library from ffmpeg
 Group:     System/Libraries
+Obsoletes: libpostproc-libav
 
 %description -n libpostproc-ffmpeg3
 FFmpeg is a very fast video and audio converter. It can also grab from a live audio/video source.
@@ -241,6 +249,7 @@ This package contains only ffmpeg's postproc post-processing headers and static
 %package -n libavresample-ffmpeg3
 Summary:       ffmpeg resample library
 Group:         System/Libraries
+Obsoletes:     libavresample-libav
 
 %description -n libavresample-ffmpeg3
 FFmpeg resample library.
@@ -589,6 +598,9 @@ ln -s ../libavcodec.a %{buildroot}%{_libdir}/libavcodec/libavcodec.a
 %{_docdir}/ffmpeg/*
 
 %changelog
+* Fri Dec 21 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 3.2.4-3mamba
+- obsolete -libav packages
+
 * Sat Nov 24 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 3.2.4-2mamba
 - legacy package