--- avidemux-2.5.1+repack.orig/cmake/admCheckVorbisDec.cmake
+++ avidemux-2.5.1+repack/cmake/admCheckVorbisDec.cmake
@@ -0,0 +1,36 @@
+########################################
+# LIBVORBIS
+########################################
+MACRO(checkvorbis)
+        IF (NOT LIBVORBIS_CHECKED)
+                OPTION(LIBVORBIS "" ON)
+
+                MESSAGE(STATUS "Checking for LIBVORBIS")
+                MESSAGE(STATUS "*******************")
+
+                IF (LIBVORBIS)
+                        IF (UNIX)
+                                SET(LIBVORBIS_REQUIRED_FLAGS "-lm")
+                        ENDIF (UNIX)
+
+
+                        FIND_HEADER_AND_LIB(LIBVORBIS vorbis/codec.h vorbis vorbis_synthesis_init ${LIBVORBIS_REQUIRED_FLAGS})
+
+                        IF (LIBVORBIS_FOUND)
+                                SET(LIBVORBIS_FOUND 1)
+                                SET(USE_LIBVORBIS 1)
+                                SET(LIBVORBIS_INCLUDE_DIR "${LIBVORBIS_INCLUDE_DIR}")
+                                SET(LIBVORBIS_LIBRARY_DIR "${LIBVORBIS_LIBRARY_DIR}")
+                        ENDIF (LIBVORBIS_FOUND)
+
+                        PRINT_LIBRARY_INFO("LIBVORBIS" LIBVORBIS_FOUND "${LIBVORBIS_INCLUDE_DIR}" "${LIBVORBIS_LIBRARY_DIR}")
+                ELSE (LIBVORBIS)
+                        MESSAGE("${MSG_DISABLE_OPTION}")
+                ENDIF (LIBVORBIS)
+
+                SET(LIBVORBIS_CHECKED 1)
+
+                MESSAGE("")
+        ENDIF (NOT LIBVORBIS_CHECKED)
+ENDMACRO(checkvorbis)
+
--- avidemux-2.5.1+repack.orig/plugins/ADM_audioDecoders/ADM_ad_vorbis/CMakeLists.txt
+++ avidemux-2.5.1+repack/plugins/ADM_audioDecoders/ADM_ad_vorbis/CMakeLists.txt
@@ -1,15 +1,16 @@
-IF (USE_VORBIS)
-	INCLUDE(ad_plugin)
-
+INCLUDE(ad_plugin)
+INCLUDE(admCheckVorbisDec)
+checkvorbis()
+IF (USE_LIBVORBIS)
 	SET(ADM_ad_vorbis_SRCS ADM_ad_vorbis.cpp)
 
 	ADD_LIBRARY(ADM_ad_vorbis SHARED ${ADM_ad_vorbis_SRCS})
 
-	TARGET_LINK_LIBRARIES(ADM_ad_vorbis ${VORBIS_LIBRARY_DIR})
-	TARGET_LINK_LIBRARIES(ADM_ad_vorbis ${VORBISENC_LIBRARY_DIR})
+	TARGET_LINK_LIBRARIES(ADM_ad_vorbis ${LIBVORBIS_LIBRARY_DIR})
+	TARGET_LINK_LIBRARIES(ADM_ad_vorbis ${LIBVORBISENC_LIBRARY_DIR})
 
-	ADD_TARGET_CFLAGS(ADM_ad_vorbis "-I${VORBIS_INCLUDE_DIR}")
+	ADD_TARGET_CFLAGS(ADM_ad_vorbis "-I${LIBVORBIS_INCLUDE_DIR}")
 
 	INIT_AUDIO_PLUGIN(ADM_ad_vorbis)
 	INSTALL_AUDIODECODER(ADM_ad_vorbis)
-ENDIF (USE_VORBIS)
+ENDIF (USE_LIBVORBIS)