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  • ios使用ffmpeg错误收集

    1. 编译ffmpeg.
      1. 下载源码后可以自己手动编译 ,反正是通过各种命令 配置configure 
      2. 通过一个很牛逼的脚本:git@github.com:kewlbear/FFmpeg-iOS-build-script.git     下载之后,检查ffmpeg的版本号,替换成最新的 然后运行脚本就行了
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        #!/bin/sh
         
        # directories
        SOURCE="ffmpeg-2.6.1"
        FAT="FFmpeg-iOS"
         
        SCRATCH="scratch"
        # must be an absolute path
        THIN=`pwd`/"thin"
         
        # absolute path to x264 library
        #X264=`pwd`/fat-x264
         
        #FDK_AAC=`pwd`/fdk-aac/fdk-aac-ios
         
        CONFIGURE_FLAGS="--enable-cross-compile --disable-debug --disable-programs
                         --disable-doc --enable-pic"
         
        if [ "$X264" ]
        then
            CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-gpl --enable-libx264"
        fi
         
        if [ "$FDK_AAC" ]
        then
            CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-libfdk-aac"
        fi
         
        # avresample
        #CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-avresample"
         
        ARCHS="arm64 armv7s armv7 x86_64 i386"
         
        COMPILE="y"
        LIPO="y"
         
        DEPLOYMENT_TARGET="6.0"
         
        if [ "$*" ]
        then
            if [ "$*" = "lipo" ]
            then
                # skip compile
                COMPILE=
            else
                ARCHS="$*"
                if [ $# -eq 1 ]
                then
                    # skip lipo
                    LIPO=
                fi
            fi
        fi
         
        if [ "$COMPILE" ]
        then
            if [ ! `which yasm` ]
            then
                echo 'Yasm not found'
                if [ ! `which brew` ]
                then
                    echo 'Homebrew not found. Trying to install...'
                    ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)" 
                        || exit 1
                fi
                echo 'Trying to install Yasm...'
                brew install yasm || exit 1
            fi
            if [ ! `which gas-preprocessor.pl` ]
            then
                echo 'gas-preprocessor.pl not found. Trying to install...'
                (curl -L https://github.com/libav/gas-preprocessor/raw/master/gas-preprocessor.pl
                    -o /usr/local/bin/gas-preprocessor.pl
                    && chmod +x /usr/local/bin/gas-preprocessor.pl)
                    || exit 1
            fi
         
            if [ ! -r $SOURCE ]
            then
                echo 'FFmpeg source not found. Trying to download...'
                curl http://www.ffmpeg.org/releases/$SOURCE.tar.bz2 | tar xj
                    || exit 1
            fi
         
            CWD=`pwd`
            for ARCH in $ARCHS
            do
                echo "building $ARCH..."
                mkdir -p "$SCRATCH/$ARCH"
                cd "$SCRATCH/$ARCH"
         
                CFLAGS="-arch $ARCH"
                if [ "$ARCH" = "i386" -o "$ARCH" = "x86_64" ]
                then
                    PLATFORM="iPhoneSimulator"
                    CFLAGS="$CFLAGS -mios-simulator-version-min=$DEPLOYMENT_TARGET"
                else
                    PLATFORM="iPhoneOS"
                    CFLAGS="$CFLAGS -mios-version-min=$DEPLOYMENT_TARGET"
                    if [ "$ARCH" = "arm64" ]
                    then
                        EXPORT="GASPP_FIX_XCODE5=1"
                    fi
                fi
         
                XCRUN_SDK=`echo $PLATFORM | tr '[:upper:]' '[:lower:]'`
                CC="xcrun -sdk $XCRUN_SDK clang"
                CXXFLAGS="$CFLAGS"
                LDFLAGS="$CFLAGS"
                if [ "$X264" ]
                then
                    CFLAGS="$CFLAGS -I$X264/include"
                    LDFLAGS="$LDFLAGS -L$X264/lib"
                fi
                if [ "$FDK_AAC" ]
                then
                    CFLAGS="$CFLAGS -I$FDK_AAC/include"
                    LDFLAGS="$LDFLAGS -L$FDK_AAC/lib"
                fi
         
                TMPDIR=${TMPDIR/%/} $CWD/$SOURCE/configure
                    --target-os=darwin
                    --arch=$ARCH
                    --cc="$CC" 
                    $CONFIGURE_FLAGS
                    --extra-cflags="$CFLAGS" 
                    --extra-cxxflags="$CXXFLAGS" 
                    --extra-ldflags="$LDFLAGS" 
                    --prefix="$THIN/$ARCH" 
                || exit 1
         
                make -j3 install $EXPORT || exit 1
                cd $CWD
            done
        fi
         
        if [ "$LIPO" ]
        then
            echo "building fat binaries..."
            mkdir -p $FAT/lib
            set - $ARCHS
            CWD=`pwd`
            cd $THIN/$1/lib
            for LIB in *.a
            do
                cd $CWD
                echo lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB 1>&2
                lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB || exit 1
            done
         
            cd $CWD
            cp -rf $THIN/$1/include $FAT
        fi
         
        echo Done
    2. 导入项目,有静态包经验的就就不用看了,这个对于我这个半路出家的和尚还是处理了老半天才解决.
      .a文件直接导入 .h文件要导入文件夹结构   配置header search 环境变量  使用的时候导入文件 结构:#import "文件夹/文件.h"
    3. 编译.
      1. 首次编译.
        复制代码
        Undefined symbols for architecture armv7:
  "_deflateInit2_", referenced from:
      _encode_frame in libavcodec.a(pngenc.o)
  "_crc32", referenced from:
      _encode_frame in libavcodec.a(pngenc.o)
  "_deflateReset", referenced from:
      _encode_frame in libavcodec.a(lclenc.o)
      _encode_frame in libavcodec.a(zmbvenc.o)
  "_compress", referenced from:
      _encode_strip in libavcodec.a(tiffenc.o)
  "_deflateBound", referenced from:
      _flashsv_decode_frame in libavcodec.a(flashsv.o)
      _encode_frame in libavcodec.a(pngenc.o)
      _encode_frame in libavcodec.a(lclenc.o)
  "_inflateSync", referenced from:
      _flashsv_decode_frame in libavcodec.a(flashsv.o)
  "_inflateReset", referenced from:
      _flashsv_decode_frame in libavcodec.a(flashsv.o)
      _zlib_decomp in libavcodec.a(lcldec.o)
      _decode_frame in libavcodec.a(tscc.o)
      _zerocodec_decode_frame in libavcodec.a(zerocodec.o)
      _decode_frame in libavcodec.a(zmbv.o)
  "_iconv_open", referenced from:
      _avcodec_open2 in libavcodec.a(utils.o)
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
  "_BZ2_bzDecompress", referenced from:
      _matroska_decode_buffer in libavformat.a(matroskadec.o)
  "_inflate", referenced from:
      _http_read_stream in libavformat.a(http.o)
      _matroska_decode_buffer in libavformat.a(matroskadec.o)
      _rtmp_open in libavformat.a(rtmpproto.o)
      _zlib_refill in libavformat.a(swfdec.o)
      _decode_frame_common in libavcodec.a(pngdec.o)
      _decode_text_chunk in libavcodec.a(pngdec.o)
      _flashsv_decode_frame in libavcodec.a(flashsv.o)
      ...
  "_inflateInit_", referenced from:
      _matroska_decode_buffer in libavformat.a(matroskadec.o)
      _rtmp_open in libavformat.a(rtmpproto.o)
      _swf_read_header in libavformat.a(swfdec.o)
      _decode_frame_apng in libavcodec.a(pngdec.o)
      _decode_frame_png in libavcodec.a(pngdec.o)
      _decode_text_chunk in libavcodec.a(pngdec.o)
      _flashsv_decode_init in libavcodec.a(flashsv.o)
      ...
  "_iconv", referenced from:
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
  "_BZ2_bzDecompressEnd", referenced from:
      _matroska_decode_buffer in libavformat.a(matroskadec.o)
  "_inflateInit2_", referenced from:
      _http_read_header in libavformat.a(http.o)
  "_deflateEnd", referenced from:
      _flashsv_decode_frame in libavcodec.a(flashsv.o)
      _flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
      _flashsv_encode_init in libavcodec.a(flashsvenc.o)
      _flashsv_encode_end in libavcodec.a(flashsvenc.o)
      _encode_frame in libavcodec.a(pngenc.o)
      _encode_end in libavcodec.a(lclenc.o)
      _encode_init in libavcodec.a(zmbvenc.o)
      ...
  "_BZ2_bzDecompressInit", referenced from:
      _matroska_decode_buffer in libavformat.a(matroskadec.o)
  "_deflateInit_", referenced from:
      _flashsv_decode_frame in libavcodec.a(flashsv.o)
      _flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
      _encode_init in libavcodec.a(lclenc.o)
      _encode_init in libavcodec.a(zmbvenc.o)
  "_zlibCompileFlags", referenced from:
      _http_read_header in libavformat.a(http.o)
  "_compress2", referenced from:
      _flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
      _flashsv_encode_frame in libavcodec.a(flashsvenc.o)
  "_deflate", referenced from:
      _flashsv_decode_frame in libavcodec.a(flashsv.o)
      _flashsv2_encode_frame in libavcodec.a(flashsv2enc.o)
      _encode_frame in libavcodec.a(pngenc.o)
      _encode_frame in libavcodec.a(lclenc.o)
      _encode_frame in libavcodec.a(zmbvenc.o)
  "_inflateEnd", referenced from:
      _http_close in libavformat.a(http.o)
      _http_read_header in libavformat.a(http.o)
      _matroska_decode_buffer in libavformat.a(matroskadec.o)
      _rtmp_open in libavformat.a(rtmpproto.o)
      _swf_read_close in libavformat.a(swfdec.o)
      _decode_frame_apng in libavcodec.a(pngdec.o)
      _decode_frame_png in libavcodec.a(pngdec.o)
      ...
  "_uncompress", referenced from:
      _id3v2_read_internal in libavformat.a(id3v2.o)
      _mov_read_cmov in libavformat.a(mov.o)
      _swf_read_packet in libavformat.a(swfdec.o)
      _decode_frame in libavcodec.a(cscd.o)
      _decode_frame in libavcodec.a(dxa.o)
      _decode_block in libavcodec.a(exr.o)
      _g2m_decode_frame in libavcodec.a(g2meet.o)
      ...
  "_iconv_close", referenced from:
      _avcodec_open2 in libavcodec.a(utils.o)
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
        复制代码

        导入 libz.1.2.5.dylib ,再次编译

        复制代码
        Undefined symbols for architecture armv7:
  "_BZ2_bzDecompressInit", referenced from:
      _matroska_decode_buffer in libavformat.a(matroskadec.o)
  "_iconv", referenced from:
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
  "_BZ2_bzDecompress", referenced from:
      _matroska_decode_buffer in libavformat.a(matroskadec.o)
  "_BZ2_bzDecompressEnd", referenced from:
      _matroska_decode_buffer in libavformat.a(matroskadec.o)
  "_iconv_open", referenced from:
      _avcodec_open2 in libavcodec.a(utils.o)
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
  "_iconv_close", referenced from:
      _avcodec_open2 in libavcodec.a(utils.o)
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
        复制代码

        导入 libbz2.1.0.dylib ,再次编译

        复制代码
        Undefined symbols for architecture armv7:
  "_iconv", referenced from:
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
  "_iconv_open", referenced from:
      _avcodec_open2 in libavcodec.a(utils.o)
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
  "_iconv_close", referenced from:
      _avcodec_open2 in libavcodec.a(utils.o)
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
        复制代码

        导入  libiconv.2.4.0.dylib  编译通过
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  • 原文地址：https://www.cnblogs.com/kelejiabing/p/4398430.html
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