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