如何解决“错误：libx264未找到”？ [英] How to resolve "ERROR: libx264 not found"?

问题描述

我需要安装ffmpeg与libx264支持启用H.264编码。我使用以下脚本安装了libx264，其工具链可以在android-ndk-r9d中使用。

 ＃！/ bin / bash 
 NDK =〜/ android-ndk-r9d 
 SYSROOT = $ NDK / platforms / android-8 / arch-arm / 
 TOOLCHAIN = $ NDK / toolchains / arm-linux-androideabi-4.6 / prebuilt / linux-x86_64 
函数build_one 
 {
 ./configure \ 
 --cross-prefix = $ TOOLCHAIN / bin / arm-linux-androideabi- \ 
 --sysroot =$ SYSROOT\ 
 --host = arm-linux \ 
 --enable-pic \ 
 --enable-shared \ 
 --disable-cli 
 make clean 
 make 
 make install 
} 
 build_one 
  

现在我想用libx264支持来构建ffmpeg。我使用以下脚本与--enable-libx264，--enable-nonfree，--enable-gpl选项，如下面的脚本。

 ＃！/ bin / bash 
 NDK =〜/ android-ndk-r9d 
 SYSROOT = $ NDK / platforms / android-8 / arch-arm / 
 TOOLCHAIN = $ NDK / toolchains / arm-linux-androideabi-4.6 / prebuilt / linux-x86_64 
 function build_one 
 {
 ./configure \ 
 --prefix = $ PREFIX \ 
 --enable-shared \ 
 --enable-nonfree \ 
 --enable-gpl \\ \\ 
 --enable-libx264 \ 
 --disable-doc \ 
 --disable-ffmpeg \ 
 --disable-ffplay \ 
  - -disable-ffprobe \ 
 --disable-ffserver \ 
 --disable-avdevice \ 
 --disable-doc \ 
 --disable-symver \ 
 --cross-prefix = $ TOOLCHAIN / bin / arm-linux-androideabi- \ 
 --target-os = linux \ 
 --arch = arm \ 
 --enable-cross-compile \ 
 --sysroot = $ SYSROOT \ 
 --extra-cflags = -  Os -fpic $ ADDI_CFLAGS\ 
 --extra- ldflags =$ ADDI_LDFLAGS\ 
 $ ADDITIONAL_CONFIGURE_FLAG 
 make clean 
 make 
 make install 
} 
 CPU = arm 
 $ PR $ = $（pwd） $ b 
但是当我运行脚本时，我收到错误错误：libx264未找到。
 
 
 
我想ffmpeg无法弄清安装libx264的位置。在libx264安装之后，我在/ usr / local / bin中的/ usr / local / lib可执行文件中的libx264.so文件和/ usr / local / include目录下的头文件。
 
 
 
为了使其检测到libx264，需要对ffmpeg构建脚本进行什么所有更改？
 
 
 
注意：我使用的是Ubuntu 12.04（64位）交叉编译。
解决方案
确保您的$ ADDI_CFLAGS变量（您传递  -  extra-cflags ）包括 -I / usr / local / include  
 
I needed to install ffmpeg with libx264 support for enabling H.264 encoding . I installed libx264 successfully using the below script with toolchains available in android-ndk-r9d .
 #!/bin/bash
 NDK=~/android-ndk-r9d
 SYSROOT=$NDK/platforms/android-8/arch-arm/
 TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64
 function build_one
 {
 ./configure \
 --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
 --sysroot="$SYSROOT" \
 --host=arm-linux \
 --enable-pic \
 --enable-shared \
 --disable-cli
 make clean
 make
 make install
 }
 build_one 
Now I wanted to build ffmpeg with libx264 support .  I used the below script with --enable-libx264 , --enable-nonfree , --enable-gpl options as in the below script . 
#!/bin/bash
NDK=~/android-ndk-r9d
SYSROOT=$NDK/platforms/android-8/arch-arm/
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64
function build_one
{
./configure \
--prefix=$PREFIX \
--enable-shared \
--enable-nonfree \
--enable-gpl \
--enable-libx264 \
--disable-doc \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffprobe \
--disable-ffserver \
--disable-avdevice \
--disable-doc \
--disable-symver \
--cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
--target-os=linux \
--arch=arm \
--enable-cross-compile \
--sysroot=$SYSROOT \
--extra-cflags="-Os -fpic $ADDI_CFLAGS" \
--extra-ldflags="$ADDI_LDFLAGS" \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make
make install
}
CPU=arm
PREFIX=$(pwd)/android/$CPU
ADDI_CFLAGS="-marm"
build_one
But when I run the script I'm getting error "ERROR: libx264 not found" .

I suppose ffmpeg is not able to figure out the installed location of libx264 . After libx264 installation I have libx264.so file in /usr/local/lib executable at /usr/local/bin and header files at /usr/local/include directories .

What all changes do I need to make to the ffmpeg build script in-order to make it detect libx264?

Note : I am using Ubuntu 12.04(64 bit) for cross compiling .
解决方案
Make sure your $ADDI_CFLAGS variable (which you pass in --extra-cflags) includes -I /usr/local/include

                        
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