Integrating FFMPEG using cmake: undefined reference when linking libraries
up vote
1
down vote
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I've been trying to cross-compile ffmpeg for different Android cpu archs for couple of days now and I have finally succeeded in the task. But now that I need to integrate these pre-built .so
files in my project I'm facing errors which have me baffled.
This is the CMakeLists.txt
which I'm using:
cmake_minimum_required(VERSION 3.4.1)
# convert SDK path to forward slashes on Windows
file(TO_CMAKE_PATH ${PATH_TO_SUPERPOWERED} PATH_TO_SUPERPOWERED)
set(CMAKE_VERBOSE_MAKEFILE on)
include_directories(src/main/cpp)
include_directories(${PATH_TO_SUPERPOWERED})
include_directories(${PATH_TO_FFMPEG}/${ANDROID_ABI}/include)
add_library(
avutil
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavutil.so
)
set_target_properties(avutil PROPERTIES LINKER_LANGUAGE CXX)
add_library(
avformat
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavformat.so
)
set_target_properties(avformat PROPERTIES LINKER_LANGUAGE CXX)
add_library(
avcodec
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavcodec.so
)
set_target_properties(avcodec PROPERTIES LINKER_LANGUAGE CXX)
add_library(
Canto
SHARED
src/main/cpp/Dubsmash.cpp
src/main/cpp/Karaoke.cpp
src/main/cpp/Singing.cpp
src/main/cpp/EditDubsmash.cpp
${PATH_TO_SUPERPOWERED}/AndroidIO/SuperpoweredAndroidAudioIO.cpp
)
# link the native library against the following libraries
target_link_libraries(
Canto
avutil
avformat
avcodec
${PATH_TO_SUPERPOWERED}/libSuperpoweredAndroid${ANDROID_ABI}.a
OpenSLES
log
android
)
And this is the source of the file I'm getting errors on:
#include <jni.h>
#include <android/log.h>
#include <string>
// unrelated includes
#include <libavformat/avformat.h>
#include <libavutil/dict.h>
#define log_write __android_log_write
#define log_print __android_log_print
// unrelated code parts
int print_file_data(const char *filePath) {
AVFormatContext *fmt_ctx = NULL;
AVDictionaryEntry *tag = NULL;
int ret;
if ((ret = avformat_open_input(&fmt_ctx, filePath, NULL, NULL)))
return ret;
while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
log_print(ANDROID_LOG_DEBUG, "%s=%sn", tag->key, tag->value);
avformat_close_input(&fmt_ctx);
return 0;
}
And finally the errors themselves:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:externalNativeBuildDebug'.
> Build command failed.
Error while executing process /home/hamed/dev/android-tools/android-sdk-linux/cmake/3.6.4111459/bin/cmake with arguments {--build /home/hamed/dev/projects/canto/Canto/app/.externalNativeBuild/cmake/debug/x86 --target Canto}
[1/1] Linking CXX shared library ../../../../build/intermediates/cmake/debug/obj/x86/libCanto.so
FAILED: : && /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++ --target=i686-none-linux-android16 --gcc-toolchain=/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/toolchains/x86-4.9/prebuilt/linux-x86_64 --sysroot=/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sysroot -fPIC -isystem /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sysroot/usr/include/i686-linux-android -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -Wa,--noexecstack -Wformat -Werror=format-security -std=c++11 -fsigned-char -I/home/hamed/dev/projects/canto/Canto/app/../Superpowered -I/home/hamed/dev/projects/canto/Canto/app/../ffmpeg -O0 -fno-limit-debug-info -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a -nostdlib++ --sysroot /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/platforms/android-16/arch-x86 -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -L/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86 -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libCanto.so -o ../../../../build/intermediates/cmake/debug/obj/x86/libCanto.so CMakeFiles/Canto.dir/src/main/cpp/Dubsmash.cpp.o CMakeFiles/Canto.dir/src/main/cpp/Karaoke.cpp.o CMakeFiles/Canto.dir/src/main/cpp/Singing.cpp.o CMakeFiles/Canto.dir/src/main/cpp/EditDubsmash.cpp.o CMakeFiles/Canto.dir/home/hamed/dev/projects/canto/Canto/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO.cpp.o ../../../../build/intermediates/cmake/debug/obj/x86/libavutil.so ../../../../build/intermediates/cmake/debug/obj/x86/libavformat.so ../../../../../Superpowered/libSuperpoweredAndroidx86.a -lOpenSLES -llog -landroid -latomic -lm "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libc++_static.a" "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libc++abi.a" "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libandroid_support.a" && :
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:295: error: undefined reference to 'avformat_open_input(AVFormatContext**, char const*, AVInputFormat*, AVDictionary**)'
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:298: error: undefined reference to 'av_dict_get(AVDictionary const*, char const*, AVDictionaryEntry const*, int)'
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:301: error: undefined reference to 'avformat_close_input(AVFormatContext**)'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.
Obviously the linker can not find the needed libraries, but why?!
UPDATE
This is the result of running nm
on libavutil.so:
0000000000000510 t atexit
0000000000000500 t __atexit_handler_wrapper
0000000000002008 A __bss_start
U __cxa_atexit
U __cxa_finalize
0000000000002000 d __dso_handle
0000000000001dd8 d _DYNAMIC
0000000000002008 A _edata
00000000000004e0 t __emutls_unregister_key
0000000000002008 A _end
00000000000005e8 r __FRAME_END__
0000000000001fd8 d _GLOBAL_OFFSET_TABLE_
0000000000000258 r ndk_build_number
0000000000000218 r ndk_version
0000000000000200 r note_android_ident
0000000000000214 r note_data
0000000000000298 r note_end
000000000000020c r note_name
00000000000004d0 t __on_dlclose
00000000000004f0 t __on_dlclose_late
and on libavformat:
0000000000000520 t atexit
0000000000000510 t __atexit_handler_wrapper
0000000000002008 A __bss_start
U __cxa_atexit
U __cxa_finalize
0000000000002000 d __dso_handle
0000000000001dd8 d _DYNAMIC
0000000000002008 A _edata
00000000000004f0 t __emutls_unregister_key
0000000000002008 A _end
00000000000005f8 r __FRAME_END__
0000000000001fd8 d _GLOBAL_OFFSET_TABLE_
0000000000000258 r ndk_build_number
0000000000000218 r ndk_version
0000000000000200 r note_android_ident
0000000000000214 r note_data
0000000000000298 r note_end
000000000000020c r note_name
00000000000004e0 t __on_dlclose
0000000000000500 t __on_dlclose_late
UPDATE 2
I applied @szatmary suggestion and finally managed to to build the apk file but upon reaching the System.loadLibrary
call an exception occurs indicating that the linker can not find libavutil.so.56
. I tried changing the address of the library in the cmake
file to actually contain the version numbered lib file to no avail:
java.lang.UnsatisfiedLinkError: dlopen failed: library "libavutil.so.56" not found
at java.lang.Runtime.loadLibrary0(Runtime.java:1016)
at java.lang.System.loadLibrary(System.java:1657)
at com.hmomeni.canto.activities.EditActivity.<init>(EditActivity.kt:26)
at java.lang.Class.newInstance(Native Method)
at android.app.Instrumentation.newActivity(Instrumentation.java:1174)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2669)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
android ffmpeg cmake android-ndk
|
show 8 more comments
up vote
1
down vote
favorite
I've been trying to cross-compile ffmpeg for different Android cpu archs for couple of days now and I have finally succeeded in the task. But now that I need to integrate these pre-built .so
files in my project I'm facing errors which have me baffled.
This is the CMakeLists.txt
which I'm using:
cmake_minimum_required(VERSION 3.4.1)
# convert SDK path to forward slashes on Windows
file(TO_CMAKE_PATH ${PATH_TO_SUPERPOWERED} PATH_TO_SUPERPOWERED)
set(CMAKE_VERBOSE_MAKEFILE on)
include_directories(src/main/cpp)
include_directories(${PATH_TO_SUPERPOWERED})
include_directories(${PATH_TO_FFMPEG}/${ANDROID_ABI}/include)
add_library(
avutil
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavutil.so
)
set_target_properties(avutil PROPERTIES LINKER_LANGUAGE CXX)
add_library(
avformat
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavformat.so
)
set_target_properties(avformat PROPERTIES LINKER_LANGUAGE CXX)
add_library(
avcodec
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavcodec.so
)
set_target_properties(avcodec PROPERTIES LINKER_LANGUAGE CXX)
add_library(
Canto
SHARED
src/main/cpp/Dubsmash.cpp
src/main/cpp/Karaoke.cpp
src/main/cpp/Singing.cpp
src/main/cpp/EditDubsmash.cpp
${PATH_TO_SUPERPOWERED}/AndroidIO/SuperpoweredAndroidAudioIO.cpp
)
# link the native library against the following libraries
target_link_libraries(
Canto
avutil
avformat
avcodec
${PATH_TO_SUPERPOWERED}/libSuperpoweredAndroid${ANDROID_ABI}.a
OpenSLES
log
android
)
And this is the source of the file I'm getting errors on:
#include <jni.h>
#include <android/log.h>
#include <string>
// unrelated includes
#include <libavformat/avformat.h>
#include <libavutil/dict.h>
#define log_write __android_log_write
#define log_print __android_log_print
// unrelated code parts
int print_file_data(const char *filePath) {
AVFormatContext *fmt_ctx = NULL;
AVDictionaryEntry *tag = NULL;
int ret;
if ((ret = avformat_open_input(&fmt_ctx, filePath, NULL, NULL)))
return ret;
while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
log_print(ANDROID_LOG_DEBUG, "%s=%sn", tag->key, tag->value);
avformat_close_input(&fmt_ctx);
return 0;
}
And finally the errors themselves:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:externalNativeBuildDebug'.
> Build command failed.
Error while executing process /home/hamed/dev/android-tools/android-sdk-linux/cmake/3.6.4111459/bin/cmake with arguments {--build /home/hamed/dev/projects/canto/Canto/app/.externalNativeBuild/cmake/debug/x86 --target Canto}
[1/1] Linking CXX shared library ../../../../build/intermediates/cmake/debug/obj/x86/libCanto.so
FAILED: : && /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++ --target=i686-none-linux-android16 --gcc-toolchain=/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/toolchains/x86-4.9/prebuilt/linux-x86_64 --sysroot=/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sysroot -fPIC -isystem /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sysroot/usr/include/i686-linux-android -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -Wa,--noexecstack -Wformat -Werror=format-security -std=c++11 -fsigned-char -I/home/hamed/dev/projects/canto/Canto/app/../Superpowered -I/home/hamed/dev/projects/canto/Canto/app/../ffmpeg -O0 -fno-limit-debug-info -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a -nostdlib++ --sysroot /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/platforms/android-16/arch-x86 -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -L/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86 -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libCanto.so -o ../../../../build/intermediates/cmake/debug/obj/x86/libCanto.so CMakeFiles/Canto.dir/src/main/cpp/Dubsmash.cpp.o CMakeFiles/Canto.dir/src/main/cpp/Karaoke.cpp.o CMakeFiles/Canto.dir/src/main/cpp/Singing.cpp.o CMakeFiles/Canto.dir/src/main/cpp/EditDubsmash.cpp.o CMakeFiles/Canto.dir/home/hamed/dev/projects/canto/Canto/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO.cpp.o ../../../../build/intermediates/cmake/debug/obj/x86/libavutil.so ../../../../build/intermediates/cmake/debug/obj/x86/libavformat.so ../../../../../Superpowered/libSuperpoweredAndroidx86.a -lOpenSLES -llog -landroid -latomic -lm "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libc++_static.a" "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libc++abi.a" "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libandroid_support.a" && :
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:295: error: undefined reference to 'avformat_open_input(AVFormatContext**, char const*, AVInputFormat*, AVDictionary**)'
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:298: error: undefined reference to 'av_dict_get(AVDictionary const*, char const*, AVDictionaryEntry const*, int)'
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:301: error: undefined reference to 'avformat_close_input(AVFormatContext**)'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.
Obviously the linker can not find the needed libraries, but why?!
UPDATE
This is the result of running nm
on libavutil.so:
0000000000000510 t atexit
0000000000000500 t __atexit_handler_wrapper
0000000000002008 A __bss_start
U __cxa_atexit
U __cxa_finalize
0000000000002000 d __dso_handle
0000000000001dd8 d _DYNAMIC
0000000000002008 A _edata
00000000000004e0 t __emutls_unregister_key
0000000000002008 A _end
00000000000005e8 r __FRAME_END__
0000000000001fd8 d _GLOBAL_OFFSET_TABLE_
0000000000000258 r ndk_build_number
0000000000000218 r ndk_version
0000000000000200 r note_android_ident
0000000000000214 r note_data
0000000000000298 r note_end
000000000000020c r note_name
00000000000004d0 t __on_dlclose
00000000000004f0 t __on_dlclose_late
and on libavformat:
0000000000000520 t atexit
0000000000000510 t __atexit_handler_wrapper
0000000000002008 A __bss_start
U __cxa_atexit
U __cxa_finalize
0000000000002000 d __dso_handle
0000000000001dd8 d _DYNAMIC
0000000000002008 A _edata
00000000000004f0 t __emutls_unregister_key
0000000000002008 A _end
00000000000005f8 r __FRAME_END__
0000000000001fd8 d _GLOBAL_OFFSET_TABLE_
0000000000000258 r ndk_build_number
0000000000000218 r ndk_version
0000000000000200 r note_android_ident
0000000000000214 r note_data
0000000000000298 r note_end
000000000000020c r note_name
00000000000004e0 t __on_dlclose
0000000000000500 t __on_dlclose_late
UPDATE 2
I applied @szatmary suggestion and finally managed to to build the apk file but upon reaching the System.loadLibrary
call an exception occurs indicating that the linker can not find libavutil.so.56
. I tried changing the address of the library in the cmake
file to actually contain the version numbered lib file to no avail:
java.lang.UnsatisfiedLinkError: dlopen failed: library "libavutil.so.56" not found
at java.lang.Runtime.loadLibrary0(Runtime.java:1016)
at java.lang.System.loadLibrary(System.java:1657)
at com.hmomeni.canto.activities.EditActivity.<init>(EditActivity.kt:26)
at java.lang.Class.newInstance(Native Method)
at android.app.Instrumentation.newActivity(Instrumentation.java:1174)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2669)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
android ffmpeg cmake android-ndk
i dont see any "file not found" errors: what i see is that linker cannot find those 3 methods in any library you provided
– pskink
Nov 21 at 10:28
@pskink but they are present in thelibavformat
andlibavutil
. Even Android Studio can resolve them in the header files.
– Hamed Momeni
Nov 21 at 10:30
so what you see if you runnm
command on ../../../../build/intermediates/cmake/debug/obj/x86/libavutil.so ../../../../build/intermediates/cmake/debug/obj/x86/libavformat.so and grep onavformat_open_input
?
– pskink
Nov 21 at 10:33
@pskink just updated the question with the result ofnm
.
– Hamed Momeni
Nov 21 at 11:55
hmmm, strange,ls -l libavutil.so
? whats the size of it?
– pskink
Nov 21 at 11:59
|
show 8 more comments
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I've been trying to cross-compile ffmpeg for different Android cpu archs for couple of days now and I have finally succeeded in the task. But now that I need to integrate these pre-built .so
files in my project I'm facing errors which have me baffled.
This is the CMakeLists.txt
which I'm using:
cmake_minimum_required(VERSION 3.4.1)
# convert SDK path to forward slashes on Windows
file(TO_CMAKE_PATH ${PATH_TO_SUPERPOWERED} PATH_TO_SUPERPOWERED)
set(CMAKE_VERBOSE_MAKEFILE on)
include_directories(src/main/cpp)
include_directories(${PATH_TO_SUPERPOWERED})
include_directories(${PATH_TO_FFMPEG}/${ANDROID_ABI}/include)
add_library(
avutil
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavutil.so
)
set_target_properties(avutil PROPERTIES LINKER_LANGUAGE CXX)
add_library(
avformat
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavformat.so
)
set_target_properties(avformat PROPERTIES LINKER_LANGUAGE CXX)
add_library(
avcodec
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavcodec.so
)
set_target_properties(avcodec PROPERTIES LINKER_LANGUAGE CXX)
add_library(
Canto
SHARED
src/main/cpp/Dubsmash.cpp
src/main/cpp/Karaoke.cpp
src/main/cpp/Singing.cpp
src/main/cpp/EditDubsmash.cpp
${PATH_TO_SUPERPOWERED}/AndroidIO/SuperpoweredAndroidAudioIO.cpp
)
# link the native library against the following libraries
target_link_libraries(
Canto
avutil
avformat
avcodec
${PATH_TO_SUPERPOWERED}/libSuperpoweredAndroid${ANDROID_ABI}.a
OpenSLES
log
android
)
And this is the source of the file I'm getting errors on:
#include <jni.h>
#include <android/log.h>
#include <string>
// unrelated includes
#include <libavformat/avformat.h>
#include <libavutil/dict.h>
#define log_write __android_log_write
#define log_print __android_log_print
// unrelated code parts
int print_file_data(const char *filePath) {
AVFormatContext *fmt_ctx = NULL;
AVDictionaryEntry *tag = NULL;
int ret;
if ((ret = avformat_open_input(&fmt_ctx, filePath, NULL, NULL)))
return ret;
while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
log_print(ANDROID_LOG_DEBUG, "%s=%sn", tag->key, tag->value);
avformat_close_input(&fmt_ctx);
return 0;
}
And finally the errors themselves:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:externalNativeBuildDebug'.
> Build command failed.
Error while executing process /home/hamed/dev/android-tools/android-sdk-linux/cmake/3.6.4111459/bin/cmake with arguments {--build /home/hamed/dev/projects/canto/Canto/app/.externalNativeBuild/cmake/debug/x86 --target Canto}
[1/1] Linking CXX shared library ../../../../build/intermediates/cmake/debug/obj/x86/libCanto.so
FAILED: : && /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++ --target=i686-none-linux-android16 --gcc-toolchain=/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/toolchains/x86-4.9/prebuilt/linux-x86_64 --sysroot=/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sysroot -fPIC -isystem /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sysroot/usr/include/i686-linux-android -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -Wa,--noexecstack -Wformat -Werror=format-security -std=c++11 -fsigned-char -I/home/hamed/dev/projects/canto/Canto/app/../Superpowered -I/home/hamed/dev/projects/canto/Canto/app/../ffmpeg -O0 -fno-limit-debug-info -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a -nostdlib++ --sysroot /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/platforms/android-16/arch-x86 -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -L/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86 -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libCanto.so -o ../../../../build/intermediates/cmake/debug/obj/x86/libCanto.so CMakeFiles/Canto.dir/src/main/cpp/Dubsmash.cpp.o CMakeFiles/Canto.dir/src/main/cpp/Karaoke.cpp.o CMakeFiles/Canto.dir/src/main/cpp/Singing.cpp.o CMakeFiles/Canto.dir/src/main/cpp/EditDubsmash.cpp.o CMakeFiles/Canto.dir/home/hamed/dev/projects/canto/Canto/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO.cpp.o ../../../../build/intermediates/cmake/debug/obj/x86/libavutil.so ../../../../build/intermediates/cmake/debug/obj/x86/libavformat.so ../../../../../Superpowered/libSuperpoweredAndroidx86.a -lOpenSLES -llog -landroid -latomic -lm "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libc++_static.a" "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libc++abi.a" "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libandroid_support.a" && :
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:295: error: undefined reference to 'avformat_open_input(AVFormatContext**, char const*, AVInputFormat*, AVDictionary**)'
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:298: error: undefined reference to 'av_dict_get(AVDictionary const*, char const*, AVDictionaryEntry const*, int)'
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:301: error: undefined reference to 'avformat_close_input(AVFormatContext**)'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.
Obviously the linker can not find the needed libraries, but why?!
UPDATE
This is the result of running nm
on libavutil.so:
0000000000000510 t atexit
0000000000000500 t __atexit_handler_wrapper
0000000000002008 A __bss_start
U __cxa_atexit
U __cxa_finalize
0000000000002000 d __dso_handle
0000000000001dd8 d _DYNAMIC
0000000000002008 A _edata
00000000000004e0 t __emutls_unregister_key
0000000000002008 A _end
00000000000005e8 r __FRAME_END__
0000000000001fd8 d _GLOBAL_OFFSET_TABLE_
0000000000000258 r ndk_build_number
0000000000000218 r ndk_version
0000000000000200 r note_android_ident
0000000000000214 r note_data
0000000000000298 r note_end
000000000000020c r note_name
00000000000004d0 t __on_dlclose
00000000000004f0 t __on_dlclose_late
and on libavformat:
0000000000000520 t atexit
0000000000000510 t __atexit_handler_wrapper
0000000000002008 A __bss_start
U __cxa_atexit
U __cxa_finalize
0000000000002000 d __dso_handle
0000000000001dd8 d _DYNAMIC
0000000000002008 A _edata
00000000000004f0 t __emutls_unregister_key
0000000000002008 A _end
00000000000005f8 r __FRAME_END__
0000000000001fd8 d _GLOBAL_OFFSET_TABLE_
0000000000000258 r ndk_build_number
0000000000000218 r ndk_version
0000000000000200 r note_android_ident
0000000000000214 r note_data
0000000000000298 r note_end
000000000000020c r note_name
00000000000004e0 t __on_dlclose
0000000000000500 t __on_dlclose_late
UPDATE 2
I applied @szatmary suggestion and finally managed to to build the apk file but upon reaching the System.loadLibrary
call an exception occurs indicating that the linker can not find libavutil.so.56
. I tried changing the address of the library in the cmake
file to actually contain the version numbered lib file to no avail:
java.lang.UnsatisfiedLinkError: dlopen failed: library "libavutil.so.56" not found
at java.lang.Runtime.loadLibrary0(Runtime.java:1016)
at java.lang.System.loadLibrary(System.java:1657)
at com.hmomeni.canto.activities.EditActivity.<init>(EditActivity.kt:26)
at java.lang.Class.newInstance(Native Method)
at android.app.Instrumentation.newActivity(Instrumentation.java:1174)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2669)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
android ffmpeg cmake android-ndk
I've been trying to cross-compile ffmpeg for different Android cpu archs for couple of days now and I have finally succeeded in the task. But now that I need to integrate these pre-built .so
files in my project I'm facing errors which have me baffled.
This is the CMakeLists.txt
which I'm using:
cmake_minimum_required(VERSION 3.4.1)
# convert SDK path to forward slashes on Windows
file(TO_CMAKE_PATH ${PATH_TO_SUPERPOWERED} PATH_TO_SUPERPOWERED)
set(CMAKE_VERBOSE_MAKEFILE on)
include_directories(src/main/cpp)
include_directories(${PATH_TO_SUPERPOWERED})
include_directories(${PATH_TO_FFMPEG}/${ANDROID_ABI}/include)
add_library(
avutil
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavutil.so
)
set_target_properties(avutil PROPERTIES LINKER_LANGUAGE CXX)
add_library(
avformat
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavformat.so
)
set_target_properties(avformat PROPERTIES LINKER_LANGUAGE CXX)
add_library(
avcodec
SHARED
${PATH_TO_FFMPEG}/${ANDROID_ABI}/lib/libavcodec.so
)
set_target_properties(avcodec PROPERTIES LINKER_LANGUAGE CXX)
add_library(
Canto
SHARED
src/main/cpp/Dubsmash.cpp
src/main/cpp/Karaoke.cpp
src/main/cpp/Singing.cpp
src/main/cpp/EditDubsmash.cpp
${PATH_TO_SUPERPOWERED}/AndroidIO/SuperpoweredAndroidAudioIO.cpp
)
# link the native library against the following libraries
target_link_libraries(
Canto
avutil
avformat
avcodec
${PATH_TO_SUPERPOWERED}/libSuperpoweredAndroid${ANDROID_ABI}.a
OpenSLES
log
android
)
And this is the source of the file I'm getting errors on:
#include <jni.h>
#include <android/log.h>
#include <string>
// unrelated includes
#include <libavformat/avformat.h>
#include <libavutil/dict.h>
#define log_write __android_log_write
#define log_print __android_log_print
// unrelated code parts
int print_file_data(const char *filePath) {
AVFormatContext *fmt_ctx = NULL;
AVDictionaryEntry *tag = NULL;
int ret;
if ((ret = avformat_open_input(&fmt_ctx, filePath, NULL, NULL)))
return ret;
while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
log_print(ANDROID_LOG_DEBUG, "%s=%sn", tag->key, tag->value);
avformat_close_input(&fmt_ctx);
return 0;
}
And finally the errors themselves:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:externalNativeBuildDebug'.
> Build command failed.
Error while executing process /home/hamed/dev/android-tools/android-sdk-linux/cmake/3.6.4111459/bin/cmake with arguments {--build /home/hamed/dev/projects/canto/Canto/app/.externalNativeBuild/cmake/debug/x86 --target Canto}
[1/1] Linking CXX shared library ../../../../build/intermediates/cmake/debug/obj/x86/libCanto.so
FAILED: : && /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++ --target=i686-none-linux-android16 --gcc-toolchain=/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/toolchains/x86-4.9/prebuilt/linux-x86_64 --sysroot=/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sysroot -fPIC -isystem /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sysroot/usr/include/i686-linux-android -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -Wa,--noexecstack -Wformat -Werror=format-security -std=c++11 -fsigned-char -I/home/hamed/dev/projects/canto/Canto/app/../Superpowered -I/home/hamed/dev/projects/canto/Canto/app/../ffmpeg -O0 -fno-limit-debug-info -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a -nostdlib++ --sysroot /home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/platforms/android-16/arch-x86 -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -L/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86 -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libCanto.so -o ../../../../build/intermediates/cmake/debug/obj/x86/libCanto.so CMakeFiles/Canto.dir/src/main/cpp/Dubsmash.cpp.o CMakeFiles/Canto.dir/src/main/cpp/Karaoke.cpp.o CMakeFiles/Canto.dir/src/main/cpp/Singing.cpp.o CMakeFiles/Canto.dir/src/main/cpp/EditDubsmash.cpp.o CMakeFiles/Canto.dir/home/hamed/dev/projects/canto/Canto/Superpowered/AndroidIO/SuperpoweredAndroidAudioIO.cpp.o ../../../../build/intermediates/cmake/debug/obj/x86/libavutil.so ../../../../build/intermediates/cmake/debug/obj/x86/libavformat.so ../../../../../Superpowered/libSuperpoweredAndroidx86.a -lOpenSLES -llog -landroid -latomic -lm "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libc++_static.a" "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libc++abi.a" "/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/x86/libandroid_support.a" && :
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:295: error: undefined reference to 'avformat_open_input(AVFormatContext**, char const*, AVInputFormat*, AVDictionary**)'
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:298: error: undefined reference to 'av_dict_get(AVDictionary const*, char const*, AVDictionaryEntry const*, int)'
/home/hamed/dev/projects/canto/Canto/app/src/main/cpp/Dubsmash.cpp:301: error: undefined reference to 'avformat_close_input(AVFormatContext**)'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.
Obviously the linker can not find the needed libraries, but why?!
UPDATE
This is the result of running nm
on libavutil.so:
0000000000000510 t atexit
0000000000000500 t __atexit_handler_wrapper
0000000000002008 A __bss_start
U __cxa_atexit
U __cxa_finalize
0000000000002000 d __dso_handle
0000000000001dd8 d _DYNAMIC
0000000000002008 A _edata
00000000000004e0 t __emutls_unregister_key
0000000000002008 A _end
00000000000005e8 r __FRAME_END__
0000000000001fd8 d _GLOBAL_OFFSET_TABLE_
0000000000000258 r ndk_build_number
0000000000000218 r ndk_version
0000000000000200 r note_android_ident
0000000000000214 r note_data
0000000000000298 r note_end
000000000000020c r note_name
00000000000004d0 t __on_dlclose
00000000000004f0 t __on_dlclose_late
and on libavformat:
0000000000000520 t atexit
0000000000000510 t __atexit_handler_wrapper
0000000000002008 A __bss_start
U __cxa_atexit
U __cxa_finalize
0000000000002000 d __dso_handle
0000000000001dd8 d _DYNAMIC
0000000000002008 A _edata
00000000000004f0 t __emutls_unregister_key
0000000000002008 A _end
00000000000005f8 r __FRAME_END__
0000000000001fd8 d _GLOBAL_OFFSET_TABLE_
0000000000000258 r ndk_build_number
0000000000000218 r ndk_version
0000000000000200 r note_android_ident
0000000000000214 r note_data
0000000000000298 r note_end
000000000000020c r note_name
00000000000004e0 t __on_dlclose
0000000000000500 t __on_dlclose_late
UPDATE 2
I applied @szatmary suggestion and finally managed to to build the apk file but upon reaching the System.loadLibrary
call an exception occurs indicating that the linker can not find libavutil.so.56
. I tried changing the address of the library in the cmake
file to actually contain the version numbered lib file to no avail:
java.lang.UnsatisfiedLinkError: dlopen failed: library "libavutil.so.56" not found
at java.lang.Runtime.loadLibrary0(Runtime.java:1016)
at java.lang.System.loadLibrary(System.java:1657)
at com.hmomeni.canto.activities.EditActivity.<init>(EditActivity.kt:26)
at java.lang.Class.newInstance(Native Method)
at android.app.Instrumentation.newActivity(Instrumentation.java:1174)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2669)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
android ffmpeg cmake android-ndk
android ffmpeg cmake android-ndk
edited Nov 21 at 18:55
asked Nov 21 at 10:23
Hamed Momeni
3,92864686
3,92864686
i dont see any "file not found" errors: what i see is that linker cannot find those 3 methods in any library you provided
– pskink
Nov 21 at 10:28
@pskink but they are present in thelibavformat
andlibavutil
. Even Android Studio can resolve them in the header files.
– Hamed Momeni
Nov 21 at 10:30
so what you see if you runnm
command on ../../../../build/intermediates/cmake/debug/obj/x86/libavutil.so ../../../../build/intermediates/cmake/debug/obj/x86/libavformat.so and grep onavformat_open_input
?
– pskink
Nov 21 at 10:33
@pskink just updated the question with the result ofnm
.
– Hamed Momeni
Nov 21 at 11:55
hmmm, strange,ls -l libavutil.so
? whats the size of it?
– pskink
Nov 21 at 11:59
|
show 8 more comments
i dont see any "file not found" errors: what i see is that linker cannot find those 3 methods in any library you provided
– pskink
Nov 21 at 10:28
@pskink but they are present in thelibavformat
andlibavutil
. Even Android Studio can resolve them in the header files.
– Hamed Momeni
Nov 21 at 10:30
so what you see if you runnm
command on ../../../../build/intermediates/cmake/debug/obj/x86/libavutil.so ../../../../build/intermediates/cmake/debug/obj/x86/libavformat.so and grep onavformat_open_input
?
– pskink
Nov 21 at 10:33
@pskink just updated the question with the result ofnm
.
– Hamed Momeni
Nov 21 at 11:55
hmmm, strange,ls -l libavutil.so
? whats the size of it?
– pskink
Nov 21 at 11:59
i dont see any "file not found" errors: what i see is that linker cannot find those 3 methods in any library you provided
– pskink
Nov 21 at 10:28
i dont see any "file not found" errors: what i see is that linker cannot find those 3 methods in any library you provided
– pskink
Nov 21 at 10:28
@pskink but they are present in the
libavformat
and libavutil
. Even Android Studio can resolve them in the header files.– Hamed Momeni
Nov 21 at 10:30
@pskink but they are present in the
libavformat
and libavutil
. Even Android Studio can resolve them in the header files.– Hamed Momeni
Nov 21 at 10:30
so what you see if you run
nm
command on ../../../../build/intermediates/cmake/debug/obj/x86/libavutil.so ../../../../build/intermediates/cmake/debug/obj/x86/libavformat.so and grep on avformat_open_input
?– pskink
Nov 21 at 10:33
so what you see if you run
nm
command on ../../../../build/intermediates/cmake/debug/obj/x86/libavutil.so ../../../../build/intermediates/cmake/debug/obj/x86/libavformat.so and grep on avformat_open_input
?– pskink
Nov 21 at 10:33
@pskink just updated the question with the result of
nm
.– Hamed Momeni
Nov 21 at 11:55
@pskink just updated the question with the result of
nm
.– Hamed Momeni
Nov 21 at 11:55
hmmm, strange,
ls -l libavutil.so
? whats the size of it?– pskink
Nov 21 at 11:59
hmmm, strange,
ls -l libavutil.so
? whats the size of it?– pskink
Nov 21 at 11:59
|
show 8 more comments
1 Answer
1
active
oldest
votes
up vote
1
down vote
accepted
ffmpeg is written in C, It links different than C++ due to name mangling.
remove the set_target_properties LINKER_LANGUAGE CXX stuff
set_target_properties(avcodec PROPERTIES LINKER_LANGUAGE CXX)
and wrap the lib includes
extern "C" {
#include <libavformat/avformat.h>
#include <libavutil/dict.h>
}
Thanks, I managed the build the apk based on your suggestion but am now facing a new problem. Would you check the UPDATE 2 part of the question?
– Hamed Momeni
Nov 21 at 19:00
1
Please don’t update like that. New problems should get new questions. Open a new question, and I will take a look.
– szatmary
Nov 21 at 19:02
Oh, alright. Will do right away.
– Hamed Momeni
Nov 21 at 19:23
Please take a look at this one... stackoverflow.com/questions/53419416/…
– Hamed Momeni
Nov 21 at 19:39
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
ffmpeg is written in C, It links different than C++ due to name mangling.
remove the set_target_properties LINKER_LANGUAGE CXX stuff
set_target_properties(avcodec PROPERTIES LINKER_LANGUAGE CXX)
and wrap the lib includes
extern "C" {
#include <libavformat/avformat.h>
#include <libavutil/dict.h>
}
Thanks, I managed the build the apk based on your suggestion but am now facing a new problem. Would you check the UPDATE 2 part of the question?
– Hamed Momeni
Nov 21 at 19:00
1
Please don’t update like that. New problems should get new questions. Open a new question, and I will take a look.
– szatmary
Nov 21 at 19:02
Oh, alright. Will do right away.
– Hamed Momeni
Nov 21 at 19:23
Please take a look at this one... stackoverflow.com/questions/53419416/…
– Hamed Momeni
Nov 21 at 19:39
add a comment |
up vote
1
down vote
accepted
ffmpeg is written in C, It links different than C++ due to name mangling.
remove the set_target_properties LINKER_LANGUAGE CXX stuff
set_target_properties(avcodec PROPERTIES LINKER_LANGUAGE CXX)
and wrap the lib includes
extern "C" {
#include <libavformat/avformat.h>
#include <libavutil/dict.h>
}
Thanks, I managed the build the apk based on your suggestion but am now facing a new problem. Would you check the UPDATE 2 part of the question?
– Hamed Momeni
Nov 21 at 19:00
1
Please don’t update like that. New problems should get new questions. Open a new question, and I will take a look.
– szatmary
Nov 21 at 19:02
Oh, alright. Will do right away.
– Hamed Momeni
Nov 21 at 19:23
Please take a look at this one... stackoverflow.com/questions/53419416/…
– Hamed Momeni
Nov 21 at 19:39
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
ffmpeg is written in C, It links different than C++ due to name mangling.
remove the set_target_properties LINKER_LANGUAGE CXX stuff
set_target_properties(avcodec PROPERTIES LINKER_LANGUAGE CXX)
and wrap the lib includes
extern "C" {
#include <libavformat/avformat.h>
#include <libavutil/dict.h>
}
ffmpeg is written in C, It links different than C++ due to name mangling.
remove the set_target_properties LINKER_LANGUAGE CXX stuff
set_target_properties(avcodec PROPERTIES LINKER_LANGUAGE CXX)
and wrap the lib includes
extern "C" {
#include <libavformat/avformat.h>
#include <libavutil/dict.h>
}
edited Nov 21 at 15:30
answered Nov 21 at 14:29
szatmary
17.6k62940
17.6k62940
Thanks, I managed the build the apk based on your suggestion but am now facing a new problem. Would you check the UPDATE 2 part of the question?
– Hamed Momeni
Nov 21 at 19:00
1
Please don’t update like that. New problems should get new questions. Open a new question, and I will take a look.
– szatmary
Nov 21 at 19:02
Oh, alright. Will do right away.
– Hamed Momeni
Nov 21 at 19:23
Please take a look at this one... stackoverflow.com/questions/53419416/…
– Hamed Momeni
Nov 21 at 19:39
add a comment |
Thanks, I managed the build the apk based on your suggestion but am now facing a new problem. Would you check the UPDATE 2 part of the question?
– Hamed Momeni
Nov 21 at 19:00
1
Please don’t update like that. New problems should get new questions. Open a new question, and I will take a look.
– szatmary
Nov 21 at 19:02
Oh, alright. Will do right away.
– Hamed Momeni
Nov 21 at 19:23
Please take a look at this one... stackoverflow.com/questions/53419416/…
– Hamed Momeni
Nov 21 at 19:39
Thanks, I managed the build the apk based on your suggestion but am now facing a new problem. Would you check the UPDATE 2 part of the question?
– Hamed Momeni
Nov 21 at 19:00
Thanks, I managed the build the apk based on your suggestion but am now facing a new problem. Would you check the UPDATE 2 part of the question?
– Hamed Momeni
Nov 21 at 19:00
1
1
Please don’t update like that. New problems should get new questions. Open a new question, and I will take a look.
– szatmary
Nov 21 at 19:02
Please don’t update like that. New problems should get new questions. Open a new question, and I will take a look.
– szatmary
Nov 21 at 19:02
Oh, alright. Will do right away.
– Hamed Momeni
Nov 21 at 19:23
Oh, alright. Will do right away.
– Hamed Momeni
Nov 21 at 19:23
Please take a look at this one... stackoverflow.com/questions/53419416/…
– Hamed Momeni
Nov 21 at 19:39
Please take a look at this one... stackoverflow.com/questions/53419416/…
– Hamed Momeni
Nov 21 at 19:39
add a comment |
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i dont see any "file not found" errors: what i see is that linker cannot find those 3 methods in any library you provided
– pskink
Nov 21 at 10:28
@pskink but they are present in the
libavformat
andlibavutil
. Even Android Studio can resolve them in the header files.– Hamed Momeni
Nov 21 at 10:30
so what you see if you run
nm
command on ../../../../build/intermediates/cmake/debug/obj/x86/libavutil.so ../../../../build/intermediates/cmake/debug/obj/x86/libavformat.so and grep onavformat_open_input
?– pskink
Nov 21 at 10:33
@pskink just updated the question with the result of
nm
.– Hamed Momeni
Nov 21 at 11:55
hmmm, strange,
ls -l libavutil.so
? whats the size of it?– pskink
Nov 21 at 11:59