diff --git a/ffmpeg.spec b/ffmpeg.spec
index 4bc89ae..63f7dce 100644
--- a/ffmpeg.spec
+++ b/ffmpeg.spec
@@ -9,7 +9,7 @@
 Name:          ffmpeg
 Epoch:         1
 Version:       4.1
-Release:       2mamba
+Release:       3mamba
 Summary:       Hyper fast MPEG1/MPEG4/H263/RV and AC3/MPEG audio encoder
 Group:         System/Libraries
 Vendor:        openmamba
@@ -79,6 +79,7 @@ BuildRequires: tetex >= 3.0
 BuildRequires: libass-devel
 BuildRequires: libenca-devel
 Obsoletes:     libffmpeg
+Obsoletes:     libav
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
@@ -109,6 +110,7 @@ Group:     System/Libraries
 Provides:  libswscale
 Obsoletes: libswscale
 Obsoletes: libswscale-ffmpeg1
+Obsoletes: libswscale-libav
 
 %description -n libswscale-ffmpeg
 ffmpeg video scaling library.
@@ -119,6 +121,7 @@ Group:     Development/Libraries
 Requires:  libswscale-ffmpeg = %{?epoch:%epoch:}%{version}-%{release}
 Provides:  libswscale-devel
 Obsoletes: libswscale-devel
+Obsoletes: libswscale-libav-devel
 
 %description -n libswscale-ffmpeg-devel
 ffmpeg video scaling library.
@@ -130,6 +133,7 @@ Summary:   ffmpeg resampling library
 Group:     System/Libraries
 Provides:  libswresample
 Obsoletes: libswresample-ffmpeg1
+Obsoletes: libswresample-libav
 
 %description -n libswresample-ffmpeg
 ffmpeg resampling library.
@@ -139,6 +143,7 @@ Summary:   Shared header files and static libraries part of ffmpeg
 Group:     Development/Libraries
 Requires:  libswresample-ffmpeg = %{?epoch:%epoch:}%{version}-%{release}
 Provides:  libresample-devel
+Obsoletes: libswresample-libav-devel
 
 %description -n libswresample-ffmpeg-devel
 ffmpeg resampling library.
@@ -151,6 +156,7 @@ Group:     System/Libraries
 Requires:  ffmpegpresets
 Provides:  libavcodec
 Obsoletes: libavcodec
+Obsoletes: libavcodec-libav
 
 %description -n libavcodec-ffmpeg
 ffmpeg library implementing various Audio/Video codecs.
@@ -161,6 +167,7 @@ Group:     Development/Libraries
 Requires:  libavcodec-ffmpeg = %{?epoch:%epoch:}%{version}-%{release}
 Provides:  libavcodec-devel
 Obsoletes: libavcodec-devel
+Obsoletes: libavcodec-libav-devel
 
 %description -n libavcodec-ffmpeg-devel
 ffmpeg library implementing various Audio/Video codecs.
@@ -171,6 +178,7 @@ Summary:   ffmpeg device handling library
 Group:     System/Libraries
 Provides:  libavdevice
 Obsoletes: libavdevice
+Obsoletes: libavdevice-libav-devel
 
 %description -n libavdevice-ffmpeg
 ffmpeg device handling library.
@@ -181,6 +189,7 @@ Group:     Development/Libraries
 Requires:  libavdevice-ffmpeg = %{?epoch:%epoch:}%{version}-%{release}
 Provides:  libavdevice-devel
 Obsoletes: libavdevice-devel
+Obsoletes: libavdevice-libav-devel
 
 %description -n libavdevice-ffmpeg-devel
 ffmpeg device handling library.
@@ -192,6 +201,7 @@ Summary:   ffmpeg filtering library
 Group:     System/Libraries
 Provides:  libavfilter
 Obsoletes: libavfilter
+Obsoletes: libavfilter-libav
 
 %description -n libavfilter-ffmpeg
 ffmpeg filtering library.
@@ -202,6 +212,7 @@ Group:     Development/Libraries
 Requires:  libavfilter-ffmpeg = %{?epoch:%epoch:}%{version}-%{release}
 Provides:  libavfilter-devel
 Obsoletes: libavfilter-devel
+Obsoletes: libavfilter-libav-devel
 
 %description -n libavfilter-ffmpeg-devel
 ffmpeg filtering library.
@@ -213,6 +224,7 @@ Summary:   ffmpeg format library
 Group:     System/Libraries
 Provides:  libavformat
 Obsoletes: libavformat
+Obsoletes: libavformat-libav
 
 %description -n libavformat-ffmpeg
 ffmpeg format library.
@@ -223,6 +235,7 @@ Group:     Development/Libraries
 Requires:  libavformat-ffmpeg = %{?epoch:%epoch:}%{version}-%{release}
 Provides:  libavformat-devel
 Obsoletes: libavformat-devel
+Obsoletes: libavformat-libav-devel
 
 %description -n libavformat-ffmpeg-devel
 ffmpeg format library.
@@ -234,6 +247,7 @@ Summary:   Shared library part of ffmpeg
 Group:     System/Libraries
 Provides:  libavutil
 Obsoletes: libavutil
+Obsoletes: libavutil-libav
 
 %description -n libavutil-ffmpeg
 Shared library part of ffmpeg
@@ -244,6 +258,7 @@ Group:     Development/Libraries
 Requires:  libavutil-ffmpeg = %{?epoch:%epoch:}%{version}-%{release}
 Provides:  libavutil-devel
 Obsoletes: libavutil-devel
+Obsoletes: libavutil-libav-devel
 
 %description -n libavutil-ffmpeg-devel
 This is the common utility library from the ffmpeg project. 
@@ -257,6 +272,7 @@ Group:     System/Libraries
 Provides:  libpostproc
 Obsoletes: libpostproc
 Obsoletes: libpostproc-ffmpeg1
+Obsoletes: libpostproc-libav
 
 %description -n libpostproc-ffmpeg
 FFmpeg is a very fast video and audio converter. It can also grab from a live audio/video source.
@@ -269,6 +285,7 @@ Group:     Development/Libraries
 Requires:  libpostproc-ffmpeg = %{?epoch:%epoch:}%{version}-%{release}
 Provides:  libpostproc-devel
 Obsoletes: libpostproc-devel
+Obsoletes: libpostproc-libav-devel
 
 %description -n libpostproc-ffmpeg-devel
 FFmpeg is a very fast video and audio converter. It can also grab from a live audio/video source.
@@ -278,6 +295,7 @@ This package contains only ffmpeg's postproc post-processing headers and static
 %package -n libavresample-ffmpeg
 Summary:       ffmpeg resample library
 Group:         System/Libraries
+Obsoletes:     libavresample-libav
 
 %description -n libavresample-ffmpeg
 FFmpeg resample library.
@@ -286,6 +304,7 @@ FFmpeg resample library.
 Summary:       Shared header files and static libraries part of ffmpeg libavresample
 Group:         System/Libraries
 Requires:      libavresample-ffmpeg = %{?epoch:%epoch:}%{version}-%{release}
+Obsoletes:     libavresample-libav-devel
 
 %description -n libavresample-ffmpeg-devel
 FFmpeg resample library.
@@ -303,6 +322,7 @@ Requires:  libavutil-ffmpeg-devel
 Requires:  libpostproc-ffmpeg-devel
 Requires:  libswscale-ffmpeg-devel
 Requires:  libswresample-ffmpeg-devel
+Obsoletes: libav-devel
 
 %description devel
 This is a virtual package that contains the dependencies necessary for installing all the FFmpeg development packages. 
@@ -629,6 +649,9 @@ ln -s ../libavcodec.a %{buildroot}%{_libdir}/libavcodec/libavcodec.a
 %{_docdir}/ffmpeg/*
 
 %changelog
+* Fri Dec 21 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 4.1-3mamba
+- obsolete -libav packages
+
 * Fri Dec 07 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 4.1-2mamba
 - rebuilt with debug package