在Android上使用librtmp编译FFMPEG时的“未定义参考”

时间:2013-12-21 17:08:47

标签: android bash ffmpeg rtmp

我已经搜索过了,虽然Building FFMPEG with librtmp for android回答了我的问题,但在编译过程中我还遇到了其他问题。

首先,我尝试使用this github repo中的脚本,将标志更改为包含

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

我在S74ck3r的instructions on his github repostream-recorder thread之后使用polarSSL构建了librtmp。这似乎工作正常,我有一个librtmp.so,librtmp.a和rtmp.h

当我尝试使用librtmp编译ffmpeg时,我收到错误

ERROR: librtmp not found

This SO question helped,我修改了ffmpeg的配置文件,以便它不会查看pkg-config for librtmp(即使pkg-config知道librtmp ...):

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

当我现在建立时,它成功启动,我得到了充满希望的路线:

librtmp enabled           yes

后来我看到了更多好消息:

...
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,在编译了所有内容之后,在安装阶段,我遇到了以下类型的错误:

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

我无法超越他们。听起来它找不到rtmp.h,其中包括对这些函数的引用,但它应该存在于(afaik)。

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

3 个答案:

答案 0 :(得分:0)

感谢您将此问题分解为一个单独的问题并彻底解决您的流程和问题。

根据提供的数据,您可以构建FFmpeg并执行二进制文件以查看协议列表。但安装阶段失败了? rtmp.h文件必须存在,因为二进制构建(在编译时需要.h,而不是链接时或运行时)。

我最好的猜测是你编译的FFmpeg二进制文件动态链接到librtmp.so。您是否将librtmp.so复制到此系统上(假设此处是交叉编译)?如果它存在,您是否运行/sbin/ldconfig以注册库?运行ldd ffmpeg以查看FFmpeg binrary想要查看的.so库。是否缺少librtmp.so的链接?

答案 1 :(得分:0)

我已经documented使用librtmp for Android成功构建FFmpeg 2.1.3的过程。

简单地说,一旦您构建了Open / PolarSSL和librtmp,请下载the latest FFmpeg release并对FFmpeg的configure进行以下更改:

# 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

然后使用以下构建脚本编译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

令人难以置信,感谢我的朋友Chris帮助我完成了这项工作。

答案 2 :(得分:0)

我想您没有在项目中链接库rtmp。 您需要像这样链接rtmp库

set(CMAKE_CXX_FLAGS“ $ {CMAKE_CXX_FLAGS} -L $ {CMAKE_SOURCE_DIR} / src / main / cpp / libs / $ {CMAKE_ANDROID_ARCH_ABI}”)

target_link_libraries(         原生库avformat avcodec avfilter avutil swresample swscale z rtmp)