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• Compiling FFMPEG with x265 has ERROR : x265 not found using pkg-config

  23 mars 2023, par timweiliu

  At first, I have a project with ffmpeg build support x264 for android in Mac OS.

  



  Now, I want to add x265 support.

  



  I have compiled the x265 with make & make install like this :

  



  [ 81%] Built target x265-static
[100%] Built target cli
Install the project...
-- Install configuration: "Release"
-- Up-to-date: /usr/local/lib/libx265.a
-- Up-to-date: /usr/local/include/x265.h
-- Up-to-date: /usr/local/include/x265_config.h
-- Up-to-date: /usr/local/lib/pkgconfig/x265.pc
-- Up-to-date: /usr/local/bin/x265


  



  and then, I run this shell script :

  



  make distclean 

NDK_PATH=$NDK_HOME
NDK_ARM_PATH=${NDK_PATH}/platforms/android-9/arch-arm
NDK_ARM_BIN_PATH=${NDK_PATH}/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin

CC=${NDK_ARM_BIN_PATH}/arm-linux-androideabi-gcc

chmod +x configure
chmod +x version.sh

if [ $APP_ABI = "armeabi-v7a" ]; then
LOCAL_CFLAGS="-O3 -DANDROID -fpic -I/usr/local/include -march=armv7-a -mfloat-abi=softfp -mfpu=neon"
ABLES="--enable-asm --enable-thumb --enable-hwaccels --cpu=armv7-a --enable-neon"
elif [ $APP_ABI = "armeabi" ]; then
LOCAL_CFLAGS="-O3 -DANDROID -fpic -I/usr/local/include"
ABLES="--disable-neon"
fi
echo $LOCAL_CFLAGS
echo $ABLES
echo $PKG_CONFIG_PATH

echo "开始configure"
./configure \
--disable-yasm \
--disable-debug \
--disable-doc \
--disable-ffmpeg \
--disable-ffprobe \
--disable-ffplay \
--disable-ffserver \
--disable-stripping \
--disable-avdevice \
--disable-postproc \
--disable-network \
--enable-pthreads \
--enable-small \
--disable-encoders \
--enable-encoder=libx264 \
--enable-encoder=libfdk_aac \
--enable-libx265 \
--pkg-config-flags="--static" \
...

echo "开始make"
make -j4

echo "开始install"
sudo make install


  



  It results in an error :

  



  -O3 -DANDROID -fpic -I/usr/local/include -march=armv7-a -mfloat-abi=softfp -mfpu=neon
--enable-asm --enable-thumb --enable-hwaccels --cpu=armv7-a --enable-neon
/usr/local/lib/pkgconfig
开始configure
ERROR: x265 not found using pkg-config


  



  I looked at the config.log :

  



  use_pkg_config x265 x265.h x265_api_get
check_pkg_config x265 x265.h x265_api_get
false --exists --print-errors x265
ERROR: x265 not found using pkg-config


  



  but, the file of x265.pc is existing on the path. Its content is :

  



  prefix=/usr/local
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include

Name: x265
Description: H.265/HEVC video encoder
Version: 0.0
Libs: -L${libdir} -lx265
Libs.private: -lstdc++ -lm -lgcc -ldl -lgcc -ldl
Cflags: -I${includedir}


  



  and the x265.h is in include path too.

  



  I run

  



  pkg-config --list-all


  



  It also finds x265 :

  



  TIMWEILIU-MC0:libSrc timweiliu$ pkg-config --list-all
libecpg_compat libecpg_compat - PostgreSQL libecpg_compat library
fdk-aac        Fraunhofer FDK AAC Codec Library - AAC codec library
apr-1          APR - The Apache Portable Runtime library
apr-util-1     APR Utils - Companion library for APR
libpq          libpq - PostgreSQL libpq library
libpcre        libpcre - PCRE - Perl compatible regular expressions C library with 8 bit character support
libpgtypes     libpgtypes - PostgreSQL libpgtypes library
libecpg        libecpg - PostgreSQL libecpg library
x264           x264 - H.264 (MPEG4 AVC) encoder library
x265           x265 - H.265/HEVC video encoder
libpcreposix   libpcreposix - PCREPosix - Posix compatible interface to libpcre
libiodbc       iODBC - iODBC Driver Manager


  



  Now, I don’t know why it does not work.
Why does pkg-config still not find the x265 ?

  


• How do you compile FFmpeg for Windows (x86 and x64) using GCC/Clang for Windows ?

  31 juillet 2019, par cdlvcdlv

  There’s an in passing mention to GCC/Clang in the FFmpeg compiling guide.

  • If using GCC/Clang, consider adding -march=native to --extra-cflags to make slightly better use of your hardware.
    Alternatively, for a more general solution, examine the --arch and
    --cpu options. Gains are variable, and usually quite small. However,
    this is usually even more safe than the above, and is thus listed
    here.

  I found a guide to compile FFmpeg 4.0 for Android, for example, but none devoted to Windows builds.

  I’m interested in detailed answers explaining how you get to compile FFmpeg Windows builds for x86 and x64 using GCC/Clang for Windows or a successfully tested guide to it (which I didn’t find).

  Please include the way you must install every software needed. Needless to say, any other useful information should be in comments.

• avcodec_find_encoder(AV_CODEC_ID_H264) returns null

  25 mai, par Monjura Rumi

  I am building an android application which will encode image captured from camera preview and later decode it. I am using ffmpeg library to encode and decode. To build static library with x264 I have used this tutorial. http://dl.dropbox.com/u/22605641/ffmpeg_android/main.html. As a source code of ffmpeg if I use the one downloaded from the link given in tutorial I can built it but can't build library if i use source code downloaded from here git clone git ://source.ffmpeg.org/ffmpeg.git ffmpeg. I have built library in ubuntu and using it in windows 7 in Eclipse. As I need only h264 encoder and decoder I have used following code for ffmpeg, slightly modified from tutorial.

  



  #!/bin/bash

NDK=~/Documents/android-ndk-r8e
PLATFORM=$NDK/platforms/android-8/arch-arm
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86
PREFIX=/home/android-ffmpeg

function build_one
{
    ./configure --target-os=linux --prefix=$PREFIX \
    --enable-cross-compile \
    --enable-runtime-cpudetect \
    --disable-asm \
    --arch=arm \
    --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
    --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
    --disable-stripping \
    --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
    --sysroot=$PLATFORM \
    --enable-nonfree \
    --enable-version3 \
    --disable-everything \
    --enable-gpl \
    --disable-doc \
    --enable-avresample \
    --disable-ffplay \
    --disable-ffserver \
    --enable-ffmpeg \
    --disable-ffprobe \
    --enable-avcodec \
    --enable-libx264 \
    --enable-encoder=libx264 \
    --enable-encoder=libx264rgb \
    --enable-decoder=h263 \
    --enable-decoder=h264 \
    --enable-decoder=svq3 \   
    --enable-zlib \
    --enable-gpl \
    --enable-pic \
    --disable-devices \
    --disable-avdevice \
    --extra-cflags="-I/home/android-ffmpeg/include -fPIC -DANDROID -D__thumb__ -mthumb -Wfatal-errors -Wno-deprecated -mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a" \
    --extra-ldflags="-L/home/android-ffmpeg/lib"
make -j4 install
$PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o
$PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -L$PREFIX/lib  -soname libffmpeg.so -shared -nostdlib  -z,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavfilter/libavfilter.a libavresample/libavresample.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog -lx264 --warn-once --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a
}

build_one


  



  After building library I have been able to build android ndk. A little part of my JNI code is here.

  



  JNIEXPORT jint JNICALL Java_com_example_testjava_TestjniActivity_initencoder(JNIEnv* env,jobject obj){

    av_register_all();
    avcodec_register_all();
    codec = avcodec_find_encoder(AV_CODEC_ID_H264);
    if (!codec) {
      __android_log_write(ANDROID_LOG_INFO, "debug", "not found");                
       return -1;
    }
.
.
.
}


  



  When I run my java source code that calls initencoder() I get -1 as return value and logcat prints "not found". That means avcodec_find_encoder() returns null and if condition is being ok. I don't know what's wrong. Why this function is returning null ? I have searched a lot but did not find any solution that could guide me to right direction. some says to use avcodec_init(). But ndk-build command fails and shows error saying undefined reference to 'avcodec_init()'. I have started with library build because I thought may be I am doing wrong from the first stage. Did I make any mistake in library building like not enabling things that I should ? Please help me here. This is kind of urgent for me.