Question

我正在尝试为Android构建和使用ffmpeg。我的Andoid Studio版本是2.2.2，ffmpeg是3.2。关于如何导入重建库的Android文档，我认为我得到了正确的设置，但一直收到此错误

ninja: error: 'avcodec-NOTFOUND', needed by '../../../../build/intermediates/cmake/debug/obj/armeabi-v7a/...

这是设置

add_library( avcodec SHARED IMPORTED )
add_library( avdevice SHARED IMPORTED )
add_library( avfilter SHARED IMPORTED )
add_library( avformat SHARED IMPORTED )
add_library( avutil SHARED IMPORTED )
add_library( swscale SHARED IMPORTED )

set_target_properties( avcodec
                        PROPERTIES FFMPEG_LIB_IMPORTED_LOCATION
                        libs/ffmpeg/${ANDROID_ABI}/lib/libavcodec.so
                        )
set_target_properties(  avdevice
                        PROPERTIES FFMPEG_LIB_IMPORTED_LOCATION
                        libs/ffmpeg/${ANDROID_ABI}/lib/libavdevice.so
                        )
set_target_properties( avfilter
                        PROPERTIES FFMPEG_LIB_IMPORTED_LOCATION
                        libs/ffmpeg/${ANDROID_ABI}/lib/libavfilter.so
                        )
set_target_properties( avformat
                        PROPERTIES FFMPEG_LIB_IMPORTED_LOCATION
                        libs/ffmpeg/${ANDROID_ABI}/lib/libavformat.so
                        )
set_target_properties( avutil
                        PROPERTIES FFMPEG_LIB_IMPORTED_LOCATION
                        libs/ffmpeg/${ANDROID_ABI}/lib/libavutil.so
                        )
set_target_properties( swscale
                        PROPERTIES FFMPEG_LIB_IMPORTED_LOCATION
                        libs/ffmpeg/${ANDROID_ABI}/lib/libswscale.so
                        )

# Specifies a path to native header files.
include_directories(
                    libs/ffmpeg/${ANDROID_ABI}/include
                    )

target_link_libraries( # Specifies the target library.
                       native-lib

                       # Links the target library to the log library
                       # included in the NDK.
                       avcodec avdevice avfilter avformat avutil swscale
                       ${log-lib}
                        )

如果我指定了完整的库名libavcodec.so ......，那么错误就会消失。

target_link_libraries( # Specifies the target library.
                       native-lib

                       # Links the target library to the log library
                       # included in the NDK.
                       libavcodec.so libavdevice.so libavfilter.so libavformat.so libavutil.so libswscale.so
                       ${log-lib}
                        )

我想知道是否有人遇到类似问题或者知道为什么编译会这样做。

Answer 1

基于Tsyvarev的输入，我在这里编译和链接的内容。

pandoc: Could not find data file /usr/local/Cellar/pandoc/1.18/share/x86_64-osx-ghc-8.0.1/pandoc-1.18/data/templates/mytemplate.latex

请注意以下重要区别：

set_target_properties中的路径必须是绝对路径。这是使用＆＃34; ../../../../" libs目录下的四个级别;但是，对于include_directory中的头文件路径，它需要是相对的。我使用绝对路径，无法找到包含文件。顺便说一句，我删除了＆fffmpeg＆＃39;文件夹中。
add_library( avcodec SHARED IMPORTED ) add_library( avdevice SHARED IMPORTED ) add_library( avfilter SHARED IMPORTED ) add_library( avformat SHARED IMPORTED ) add_library( avutil SHARED IMPORTED ) add_library( swscale SHARED IMPORTED ) set_target_properties( avcodec PROPERTIES IMPORTED_LOCATION ../../../../libs/${ANDROID_ABI}/lib/libavcodec.so ) set_target_properties( avdevice PROPERTIES IMPORTED_LOCATION ../../../../libs/${ANDROID_ABI}/lib/libavdevice.so ) set_target_properties( avfilter PROPERTIES IMPORTED_LOCATION ../../../..//libs/${ANDROID_ABI}/lib/libavfilter.so ) set_target_properties( avformat PROPERTIES IMPORTED_LOCATION ../../../../libs/${ANDROID_ABI}/lib/libavformat.so ) set_target_properties( avutil PROPERTIES IMPORTED_LOCATION ../../../../libs/${ANDROID_ABI}/lib/libavutil.so ) set_target_properties( swscale PROPERTIES IMPORTED_LOCATION ../../../../libs/${ANDROID_ABI}/lib/libswscale.so ) # Specifies a path to native header files. include_directories( libs/${ANDROID_ABI}/include ) target_link_libraries( # Specifies the target library. native-lib # Links the target library to the log library # included in the NDK. avcodec avdevice avfilter avformat avutil swscale ${log-lib} )中的导入位置属性必须为 set_target_properties 。

＆＃39; import-lib - NOTFOUND＆＃39;在为android studio 2.2构建ffmpeg 3.2

1 个答案: