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。按照有关如何导入重建库的 Android 文档,我认为我的设置正确但一直出现此错误
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}
)
如果我指定完整的库名称 libavcodec.so...,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
${log-lib}
)
我想知道是否有人遇到过类似的问题或知道为什么编译会这样。
最佳答案
根据 Tsyvarev 的输入,我在此处编译和链接的内容。
add_library( avcodec SHARED IMPORTED )
add_library( avdevice SHARED IMPORTED )
add_library( avfilter SHARED IMPORTED )
add_library( avformat SHARED IMPORTED )
add_library( avutil SHARED IMPORTED )
add_library( swscale SHARED IMPORTED )
set_target_properties( avcodec
PROPERTIES IMPORTED_LOCATION
../../../../libs/${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}
)
注意以下重要区别:
set_target_properties 中的路径必须是绝对路径。这里是使用"../../../../"四层到libs目录;但是,对于 include_directory 中的头文件路径,它需要是相对的。我使用了绝对路径,但找不到包含文件。顺便说一下,我删除了“ffmpeg”文件夹。
set_target_properties
中的导入位置属性需要为IMPORTED_LOCATION
。
关于android - 'imported-lib - NOTFOUND' 在为 android studio 2.2 构建 ffmpeg 3.2,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40352177/