＆QUOT;未定义参考和QUOT;编译FFMPEG在Android librtmp时 [英] "Undefined Reference" when compiling FFMPEG with librtmp on Android

问题描述

我已经搜查，而大厦FFMPEG与librtmp为Android 回答我的问题的一部分，我遇到了其他问题进一步沿着编译过程。

I have searched, and while Building FFMPEG with librtmp for android answered part of my question, I ran into other issues further along in the compilation process.

首先，我想使用这个脚本在这github上回购，改变标志包括：

First, I am trying to use the script in this github repo, changing the flags to include

  --enable-librtmp \
  --extra-cflags=-I/home/bradford/Development/FFMPEG/rtmp/rtmpdump/librtmp/ \
  --extra-ldflags=-L/home/bradford/Development/FFMPEG/rtmp/rtmpdump/librtmp"

我建立librtmp与polarSSL以下S74ck3r的他github上回购指示和流记录线程。这似乎正常工作，我有一个librtmp.so，librtmp.a和rtmp.h

I build librtmp with polarSSL following S74ck3r's instructions on his github repo and stream-recorder thread. That appears to work correctly, and I have a librtmp.so, librtmp.a and rtmp.h

当我尝试编译的ffmpeg与librtmp，我得到的错误

When I try to compile ffmpeg with librtmp, I get the error

ERROR: librtmp not found

这太问题帮助和我修改的ffmpeg的配置文件，使它不会看pkg配置为librtmp（即使pkg配置意识到librtmp的...）：

This SO question helped, and I modified ffmpeg's config file so that it wouldn't look at pkg-config for librtmp (even though pkg-config was aware of librtmp...):

#enabled librtmp    && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket

当我现在建立，启动成功，我也得到了充满希望的行：

When I build now, it starts successfully, and I get the hopeful line:

librtmp enabled           yes

和后来我看到更多的好消息：

And later on I see more good news:

...
Enabled protocols:
applehttp       http            mmsh
cache           httpproxy       mmst
concat          librtmp         mmsu
crypto          librtmpe        pipe
fd          librtmps        rtp
file            librtmpt        tcp
gopher          librtmpte       udp
hls         md5
...

但最后，编译一切，在安装阶段后，我得到这些类型的错误：

but finally, after compiling everything and during the installation phase, I get these types of errors:

INSTALL   libavutil/libavutil.pc
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_get_file_handle:libavformat/librtmp.c:190: error: undefined reference to 'RTMP_Socket'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_read_seek:libavformat/librtmp.c:180: error: undefined reference to 'RTMP_SendSeek'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_read_pause:libavformat/librtmp.c:161: error: undefined reference to 'RTMP_Pause'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_close:libavformat/librtmp.c:64: error: undefined reference to 'RTMP_Close'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_write:libavformat/librtmp.c:145: error: undefined reference to 'RTMP_Write'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_read:libavformat/librtmp.c:153: error: undefined reference to 'RTMP_Read'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_open:libavformat/librtmp.c:96: error: undefined reference to 'RTMP_LogSetLevel'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_open:libavformat/librtmp.c:97: error: undefined reference to 'RTMP_LogSetCallback'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_open:libavformat/librtmp.c:118: error: undefined reference to 'RTMP_Init'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_open:libavformat/librtmp.c:119: error: undefined reference to 'RTMP_SetupURL'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_open:libavformat/librtmp.c:127: error: undefined reference to 'RTMP_Connect'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_open:libavformat/librtmp.c:127: error: undefined reference to 'RTMP_ConnectStream'
/tmp/FFMPEG/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: libavformat/librtmp.o: in function rtmp_open:libavformat/librtmp.c:125: error: undefined reference to 'RTMP_EnableWrite'
collect2: ld returned 1 exit status

和我不能让他们过去。这听起来像它不能找到rtmp.h，其中包括对这些函数的引用，但这是present它应该是（据我所知）。

And I can't get past them. It sounds like it can't find rtmp.h, which includes references to those functions, but that is present where it should be (afaik).

另外，我的项目需要librtmp - 内置的ffmpeg的RTMP功能是不够的，因为我需要librtmp的身份验证功能

Also, my project requires librtmp - the built-in rtmp features of ffmpeg are not sufficient because I require the authentication features of librtmp.

推荐答案

我已经记录我的成功与librtmp建设的FFmpeg 2.1.3 Android的过程。

I've documented my process of successfully building FFmpeg 2.1.3 with librtmp for Android.

简单地说，一旦你建立开放式/ PolarSSL和librtmp，下载最新发布的FFmpeg 并进行以下更改FFmpeg的配置：

Briefly, once you build Open/PolarSSL and librtmp, download the latest FFmpeg release and make the following changes to FFmpeg's configure:

# ffmpegX.X.X/configure
...
# Replace the following lines:

#SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
#LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
#SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
#SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'

# With: 

SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
SLIB_INSTALL_LINKS='$(SLIBNAME)'

...

# Replace this:
#enabled librtmp    && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
# With:
enabled librtmp    && require librtmp librtmp/rtmp.h RTMP_Socket -L/path/to/rtmpdump/librtmp/android/arm/lib -lrtmp

然后用下面的构建脚本编译FFmpeg的：

Then use the following build script to compile FFmpeg:

# ffmpegX.X.X/build_ffmpeg_with_librtmp_for_android.sh
#!/bin/bash
NDK=/path/to/android-ndk-r9c
SYSROOT=$NDK/platforms/android-19/arch-arm/
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/darwin-x86_64

OPENSSL_DIR=/path/to/openssl-android/
LIBRTMP_DIR=/path/to/rtmpdump/librtmp/
# Note: Change above variables to match your system
function build_one
{
./configure \
    --prefix=$PREFIX \
    --enable-librtmp \
    --enable-shared \
    --disable-static \
    --disable-doc \
    --disable-programs \
    --disable-doc \
    --disable-symver \
    --cross-prefix=$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" \
    $ADDITIONAL_CONFIGURE_FLAG
make clean
make -j8
make install
}
CPU=arm
PREFIX=$(pwd)/android/$CPU 
ADDI_CFLAGS="-marm -I${OPENSSL_DIR}include -I${LIBRTMP_DIR}android/arm/include -L${LIBRTMP_DIR}android/arm/lib -lrtmp"
ADDI_LFLAGS="-L${OPENSSL_DIR}libs/armeabi -L${LIBRTMP_DIR}android/arm/lib -lrtmp" 
build_one

不可思议感谢我的朋友克里斯帮助我通过此。

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