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Sur d’autres sites (8421)

  • Cant link against ffmpeg static build

    24 mars 2017, par David Barishev

    I have build ffmpeg libraries statically for x86 android using a custom configuration.Now i wanted to add them in my android project.

    Im using ffmpeg 3.2.git, android studio 2.3.

    I created a folder named distribution which had my binaries, and the minimum headers i needed for it to not tell me about missing header (Except for the avutil- i just included them all), located the root of my project.
    Here is a file tree :

    distribution
    
├── libavcodec
    
│   ├── lib
    
│   │   └── x86
    
│   │       └── libavcodec.a
    
│   ├── avcodec.h
    
│   └── version.h
    
├── libavfilter
    
│   ├── lib
    
│   │   └── x86
    
│   │       └── libavfilter.a
    
│   ├── avfiltergraph.h
    
│   └── avfilter.h
    
├── libavformat
    
│   ├── lib
    
│   │   └── x86
    
│   │       └── libavformat.a
    
│   ├── avformat.h
    
│   ├── avio.h
    
│   └── version.h
    
├── libavutil
    
│   ├── lib
    
│   │   └── x86
    
│   │       └── libavutil.a
    
│   ├── attributes.h
    
│   ├── avconfig.h
    
│   ├── avutil.h
    
│   ├── buffer.h
    
│   ├── buffer_internal.h
    
│   ├── camellia.h
    
│   ├── cast5.h
    
│   ├── channel_layout.h
    
│   ├── colorspace.h
    
│   ├── color_utils.h
    
│   ├── common.h
    
│   ├── cpu.h
    
│   ├── cpu_internal.h
    
│   ├── crc.h
    
│   ├── des.h
    
│   ├── dict.h
    
│   ├── display.h
    
│   ├── downmix_info.h
    
│   ├── dynarray.h
    
│   ├── error.h
    
│   ├── eval.h
    
│   ├── ffmath.h
    
│   ├── ffversion.h
    
│   ├── fifo.h
    
│   ├── file.h
    
│   ├── fixed_dsp.h
    
│   ├── float_dsp.h
    
│   ├── frame.h
    
│   ├── hash.h
    
│   ├── hmac.h
    
│   ├── hwcontext_cuda.h
    
│   ├── hwcontext_cuda_internal.h
    
│   ├── hwcontext_dxva2.h
    
│   ├── hwcontext.h
    
│   ├── hwcontext_internal.h
    
│   ├── hwcontext_qsv.h
    
│   ├── hwcontext_vaapi.h
    
│   ├── hwcontext_vdpau.h
    
│   ├── imgutils.h
    
│   ├── integer.h
    
│   ├── internal.h
    
│   ├── intfloat.h
    
│   ├── intmath.h
    
│   ├── intreadwrite.h
    
│   ├── lfg.h
    
│   ├── libm.h
    
│   ├── lls.h
    
│   ├── log.h
    
│   ├── lzo.h
    
│   ├── macros.h
    
│   ├── mastering_display_metadata.h
    
│   ├── mathematics.h
    
│   ├── md5.h
    
│   ├── mem.h
    
│   ├── mem_internal.h
    
│   ├── motion_vector.h
    
│   ├── murmur3.h
    
│   ├── opencl.h
    
│   ├── opencl_internal.h
    
│   ├── opt.h
    
│   ├── parseutils.h
    
│   ├── pca.h
    
│   ├── pixdesc.h
    
│   ├── pixelutils.h
    
│   ├── pixfmt.h
    
│   ├── qsort.h
    
│   ├── random_seed.h
    
│   ├── rational.h
    
│   ├── rc4.h
    
│   ├── replaygain.h
    
│   ├── reverse.h
    
│   ├── ripemd.h
    
│   ├── samplefmt.h
    
│   ├── sha512.h
    
│   ├── sha.h
    
│   ├── softfloat.h
    
│   ├── softfloat_ieee754.h
    
│   ├── softfloat_tables.h
    
│   ├── spherical.h
    
│   ├── stereo3d.h
    
│   ├── tablegen.h
    
│   ├── tea.h
    
│   ├── thread.h
    
│   ├── threadmessage.h
    
│   ├── timecode.h
    
│   ├── time.h
    
│   ├── time_internal.h
    
│   ├── timer.h
    
│   ├── timestamp.h
    
│   ├── tree.h
    
│   ├── twofish.h
    
│   └── version.h
    
└── libswresample
    
    ├── lib
    
    │   └── x86
    
    │       └── libswresample.a
    
    ├── swresample.h
    
    └── swresample_internal.h

    I edited my cmake to include the libraries :

    add_library(
    
         native-lib
    
         SHARED
    
         src/main/cpp/native-lib.cpp )
    

    
set(distribution_DIR ${CMAKE_SOURCE_DIR}/../distribution)
    

    
add_library(lib_avcodec STATIC IMPORTED)
    
set_target_properties(lib_avcodec PROPERTIES IMPORTED_LOCATION
    
    ${distribution_DIR}/libavcodec/lib/${ANDROID_ABI}/libavcodec.a)
    

    
add_library(lib_avfilter STATIC IMPORTED)
    
set_target_properties(lib_avfilter PROPERTIES IMPORTED_LOCATION
    
    ${distribution_DIR}/libavfilter/lib/${ANDROID_ABI}/libavfilter.a)
    

    
add_library(lib_avformat STATIC IMPORTED)
    
set_target_properties(lib_avformat PROPERTIES IMPORTED_LOCATION
    
    ${distribution_DIR}/libavformat/lib/${ANDROID_ABI}/libavformat.a)
    

    
add_library(lib_avutil STATIC IMPORTED)
    
set_target_properties(lib_avutil PROPERTIES IMPORTED_LOCATION
    
    ${distribution_DIR}/libavutil/lib/${ANDROID_ABI}/libavutil.a)
    

    
add_library(lib_swresample STATIC IMPORTED)
    
set_target_properties(lib_swresample PROPERTIES IMPORTED_LOCATION
    
    ${distribution_DIR}/libswresample/lib/${ANDROID_ABI}/libswresample.a)
    

    

    
include_directories(
    
                          ${distribution_DIR}
    
                          )
    

    

    
target_link_libraries( 
    
                       native-lib
    

    
                       lib_avcodec
    
                       lib_avfilter
    
                       lib_avformat
    
                       lib_avutil
    
                       lib_swresample
    
                        )

    I also restricted the build to only x86, in my app build.gradle :

    ndk {
    
            // Specifies the ABI configurations of your native
    
            // libraries Gradle should build and package with your APK.
    
            abiFilters 'x86'
    
    }

    The project gradle sync worked successfully.
    I wrote the following code in my cpp file :

    #include 
    

    

    
extern "C"{
    
    #include "libavformat/avformat.h"
    
}
    
JNIEXPORT void JNICALL
    
Java_com_example_david_testffmpegcpp_MainActivity_stringFromJNI(
    
        JNIEnv *env,
    
        jobject /* this */) {
    

    
    av_register_all ();
    
    avformat_network_init ();
    

    

    
}

    Just to check if the library works, but i cant seem to link against the libraries correctly. It complains about undefined symbols.
    What did i do wrong ?

    Error :

    [2/2] Linking CXX shared library 
    

    
..\..\..\..\build\intermediates\cmake\debug\obj\x86\libnative-lib.so
    
FAILED: cmd.exe /C "cd . && D:\AndroidSDK\ndk-bundle\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe  --target=i686-none-linux-android --gcc-toolchain=D:/AndroidSDK/ndk-bundle/toolchains/x86-4.9/prebuilt/windows-x86_64 --sysroot=D:/AndroidSDK/ndk-bundle/platforms/android-16/arch-x86 -fPIC -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -Wa,--noexecstack -Wformat -Werror=format-security  -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -Wa,--noexecstack -Wformat -Werror=format-security   -O0 -fno-limit-debug-info -O0 -fno-limit-debug-info  -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libnative-lib.so -o ..\..\..\..\build\intermediates\cmake\debug\obj\x86\libnative-lib.so CMakeFiles/native-lib.dir/src/main/cpp/native-lib.cpp.o  -llog ../../../../../distribution/libavcodec/lib/x86/libavcodec.a ../../../../../distribution/libavfilter/lib/x86/libavfilter.a ../../../../../distribution/libavformat/lib/x86/libavformat.a ../../../../../distribution/libavutil/lib/x86/libavutil.a ../../../../../distribution/libswresample/lib/x86/libswresample.a -lm "D:/AndroidSDK/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/libs/x86/libgnustl_static.a" && cd ."
    
src/libavformat/allformats.c:51: error: undefined reference to 'avcodec_register_all'
    
  src/libavformat/id3v2.c:1009: error: undefined reference to 'uncompress'
    
  src/libavformat/id3v2.c:1153: error: undefined reference to 'av_init_packet'
    
  src/libavformat/matroskadec.c:1393: error: undefined reference to 'inflateInit_'
    
  src/libavformat/matroskadec.c:1408: error: undefined reference to 'inflate'
    
  src/libavformat/matroskadec.c:1401: error: undefined reference to 'inflateEnd'
    
  src/libavformat/matroskadec.c:1411: error: undefined reference to 'inflateEnd'
    
  src/libavformat/matroskadec.c:3113: error: undefined reference to 'av_new_packet'
    
  src/libavformat/matroskadec.c:3134: error: undefined reference to 'av_packet_new_side_data'
    
  src/libavformat/matroskadec.c:2855: error: undefined reference to 'av_new_packet'
    
  src/libavformat/matroskadec.c:3147: error: undefined reference to 'av_packet_new_side_data'
    
  src/libavformat/matroskadec.c:3022: error: undefined reference to 'av_new_packet'
    
  src/libavformat/matroskadec.c:3031: error: undefined reference to 'av_packet_new_side_data'
    
  src/libavformat/matroskadec.c:3042: error: undefined reference to 'av_packet_new_side_data'
    
  src/libavformat/matroskadec.c:3151: error: undefined reference to 'av_packet_unref'
    
  src/libavformat/matroskadec.c:2680: error: undefined reference to 'av_packet_unref'
    
  src/libavformat/matroskadec.c:963: error: undefined reference to 'av_fast_padded_malloc'
    
  src/libavformat/matroskadec.c:2163: error: undefined reference to 'av_get_codec_tag_string'
    
  src/libavformat/matroskadec.c:2680: error: undefined reference to 'av_packet_unref'
    
  src/libavformat/matroskadec.c:2579: error: undefined reference to 'av_init_packet'
    
  src/libavformat/matroskadec.c:2580: error: undefined reference to 'av_new_packet'
    
  src/libavformat/matroskadec.c:1715: error: undefined reference to 'avpriv_mpeg4audio_sample_rates'
    
  src/libavformat/matroskadec.c:1715: error: undefined reference to 'avpriv_mpeg4audio_sample_rates'
    
  src/libavformat/matroskadec.c:1715: error: undefined reference to 'avpriv_mpeg4audio_sample_rates'
    
  src/libavformat/matroskadec.c:1866: error: undefined reference to 'avcodec_chroma_pos_to_enum'
    
  src/libavformat/matroskadec.c:2680: error: undefined reference to 'av_packet_unref'
    
  src/libavformat/matroskaenc.c:2482: error: undefined reference to 'avcodec_get_type'
    
  src/libavformat/matroskaenc.c:646: error: undefined reference to 'avpriv_split_xiph_headers'
    
  src/libavformat/matroskaenc.c:1066: error: undefined reference to 'av_get_bits_per_sample'
    
  src/libavformat/matroskaenc.c:723: error: undefined reference to 'avpriv_mpeg4audio_get_config'
    
  src/libavformat/matroskaenc.c:875: error: undefined reference to 'avcodec_enum_to_chroma_pos'
    
  src/libavformat/matroskaenc.c:813: error: undefined reference to 'avcodec_get_name'
    
  src/libavformat/matroskaenc.c:806: error: undefined reference to 'avcodec_get_name'
    
  src/libavformat/matroskaenc.c:824: error: undefined reference to 'avcodec_get_name'
    
  .....

  • doc : Link to "Resampler Options" in the aresample documentation.

    2 mars 2017, par Carl Eugen Hoyos
    doc : Link to "Resampler Options" in the aresample documentation.
    • [DH] doc/filters.texi

  • How to link and call function of prebuild static native library from android studio

    23 janvier 2017, par Janaki

    I need to change pitch and time stretching of an audio. For this I am using prebuild static library. Currently I am having libZtxAndroid.a static library and corresponding header file which contains function declaration. But I don’t know how to load this library in my android studio app and call native function from java code. I explored many links and tried to load this library. But all attempts are failed. This is the one link which I have tried last time https://tariqzubairy.wordpress.com/2012/03/12/use-of-prebuild-static-library-compiled-with-android-toolchain/

    Also I am using FFMPEG shared library and MP4Parser (https://github.com/sannies/mp4parser) library in this app for adding water mark to video and merging audio respectively. Can any one help from basics.

    1. How to load static library ?
    2. Where I need to place that static library ?
    3. Where I need to create jni folder (folder structure) ?
    4. How to call function available in that static library with the help of header file from java code ?

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