Mp4V2库编译及使用

需求：想用Mp4V2 库将H264流录成MP4文件

反复折腾了好一下子，才整出来，再次纪录下。

具体实现：

1、下载Mp4v2源码

google code下载地址：http://code.google.com/p/mp4v2/downloads/list,若打不开链接，可以去github里搜索，本人也将其打包全部上传到github。

2、编译IOS上平台上合并库。

编译脚本如下（忘记出处了，不好意思）：

#!/bin/shIOS_BASE_SDK=8.2
SOURCE="mp4v2-2.0.0"ROOT=`pwd`
FAT="$ROOT/fat"
THIN="$ROOT/thin"ARCHS="i386 x86_64 armv7 armv7s arm64 "
#ARCHS="i386 x86_64"
CONFIGURE_FLAGS="--disable-gch --disable-debug --disable-util \--enable-shared=no"clean()
{rm -rf $THINrm -rf $FAT
}cleanfor ARCH in $ARCHS
doecho "building $ARCH .."if [ "$ARCH" = "i386" -o "$ARCH" = "x86_64" ]thenPLATFORM="iPhoneSimulator"CPU=if [ "$ARCH" = "x86_64" ]thenSIMULATOR="-mios-simulator-version-min=7.0"HOST=elseSIMULATOR="-mios-simulator-version-min=5.0"HOST="--host=i386-apple-darwin"fielsePLATFORM="iPhoneOS"if [ $ARCH = "armv7s" ]thenCPU="--cpu=swift"elseCPU=fiSIMULATOR=HOST="--host=arm-apple-darwin"fiDEVROOT=`xcode-select -p`/"Platforms/$PLATFORM.platform/Developer"SDKROOT=$DEVROOT/SDKs/$PLATFORM$IOS_BASE_SDK.sdkCFLAGS="-arch $ARCH $SIMULATOR -pipe -no-cpp-precomp -isysroot $SDKROOT -I$SDKROOT/usr/include/"export CFLAGS="$CFLAGS"export CXX="llvm-g++"export CC="llvm-gcc"if [ "$ARCH" = "i386" -o "$ARCH" = "x86_64" ]thenexport LD=$DEVROOT/usr/bin/ldexport LDFLAGS="-L$SDKROOT/usr/lib/"elseexport LD=$DEVROOT/usr/bin/ldexport AR=$DEVROOT/usr/bin/arexport AS=$DEVROOT/usr/bin/asexport NM=$DEVROOT/usr/bin/nmexport RANLIB=$DEVROOT/usr/bin/ranlibexport LDFLAGS="-L$SDKROOT/usr/lib/"export LIBTOOL=$DEVROOT/usr/bin/libtoolexport LIPO=$DEVROOT/usr/bin/lipoexport OTOOL=$DEVROOT/usr/bin/otoolexport NMEDIT=$DEVROOT/usr/bin/nmeditexport DSYMUTIL=$DEVROOT/usr/bin/dsymutilexport STRIP=$DEVROOT/usr/bin/stripfiexport CPPFLAGS=$CFLAGSexport CXXFLAGS=$CFLAGSmake distclean$ROOT/$SOURCE/configure $CONFIGURE_FLAGS $HOST --prefix="$THIN/$ARCH"makemake installecho "build $ARCH done.."
doneecho "building fat .."mkdir -p "${FAT}/lib"set - $ARCHS
CWD=`pwd`cd ${THIN}/$1/lib
for LIB in `ls *.a`
doecho $LIBcd $CWDxcrun -sdk iphoneos lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB
donecd $CWD
cp -rf $THIN/$1/include $FATecho "build fat done.."

3、使用：在写入文件时，需要先写入SPS帧和PPS帧，然后再写入I，B，P帧，不然录像文件播放不了。

#include "mp4record.h"
#include <stdlib.h>typedef struct MP4V2_CONTEXT{int m_vWidth,m_vHeight,m_vFrateR,m_vTimeScale;MP4FileHandle m_mp4FHandle;MP4TrackId m_vTrackId,m_aTrackId;double m_vFrameDur;
} MP4V2_CONTEXT;struct MP4V2_CONTEXT * recordCtx = NULL;int initMp4Encoder(const char * filename,int width,int height){int ret = -1;recordCtx = malloc(sizeof(struct MP4V2_CONTEXT));if (!recordCtx) {printf("error : malloc context \n");return ret;}recordCtx->m_vWidth = width;recordCtx->m_vHeight = height;recordCtx->m_vFrateR = 25;recordCtx->m_vTimeScale = 90000;recordCtx->m_vFrameDur = 300;recordCtx->m_vTrackId = 0;recordCtx->m_aTrackId = 0;recordCtx->m_mp4FHandle = MP4Create(filename,0);if (recordCtx->m_mp4FHandle == MP4_INVALID_FILE_HANDLE) {printf("error : MP4Create  \n");return ret;}MP4SetTimeScale(recordCtx->m_mp4FHandle, recordCtx->m_vTimeScale);//------------------------------------------------------------------------------------- audio track
//    recordCtx->m_aTrackId = MP4AddAudioTrack(recordCtx->m_mp4FHandle, 44100, 1024, MP4_MPEG4_AUDIO_TYPE);
//    if (recordCtx->m_aTrackId == MP4_INVALID_TRACK_ID){
//        printf("error : MP4AddAudioTrack  \n");
//        return ret;
//    }
//
//    MP4SetAudioProfileLevel(recordCtx->m_mp4FHandle, 0x2);
//    uint8_t aacConfig[2] = {18,16};
//    MP4SetTrackESConfiguration(recordCtx->m_mp4FHandle,recordCtx->m_aTrackId,aacConfig,2);
//    printf("ok  : initMp4Encoder file=%s  \n",filename);return 0;
}
int mp4VEncode(uint8_t * _naluData ,int _naluSize){int index = -1;if(_naluData[0]==0 && _naluData[1]==0 && _naluData[2]==0 && _naluData[3]==1 && _naluData[4]==0x67){index = _NALU_SPS_;}if(index!=_NALU_SPS_ && recordCtx->m_vTrackId == MP4_INVALID_TRACK_ID){return index;}if(_naluData[0]==0 && _naluData[1]==0 && _naluData[2]==0 && _naluData[3]==1 && _naluData[4]==0x68){index = _NALU_PPS_;}if(_naluData[0]==0 && _naluData[1]==0 && _naluData[2]==0 && _naluData[3]==1 && _naluData[4]==0x65){index = _NALU_I_;}if(_naluData[0]==0 && _naluData[1]==0 && _naluData[2]==0 && _naluData[3]==1 && _naluData[4]==0x41){index = _NALU_P_;}//switch(index){case _NALU_SPS_:if(recordCtx->m_vTrackId == MP4_INVALID_TRACK_ID){recordCtx->m_vTrackId = MP4AddH264VideoTrack(recordCtx->m_mp4FHandle,recordCtx->m_vTimeScale,recordCtx->m_vTimeScale / recordCtx->m_vFrateR,recordCtx->m_vWidth,     // widthrecordCtx->m_vHeight,    // height_naluData[5], // sps[1] AVCProfileIndication_naluData[6], // sps[2] profile_compat_naluData[7], // sps[3] AVCLevelIndication3);           // 4 bytes length before each NAL unitif (recordCtx->m_vTrackId == MP4_INVALID_TRACK_ID)  {return -1;}MP4SetVideoProfileLevel(recordCtx->m_mp4FHandle, 0x7F); //  Simple Profile @ Level 3}MP4AddH264SequenceParameterSet(recordCtx->m_mp4FHandle,recordCtx->m_vTrackId,_naluData+4,_naluSize-4);//break;case _NALU_PPS_:MP4AddH264PictureParameterSet(recordCtx->m_mp4FHandle,recordCtx->m_vTrackId,_naluData+4,_naluSize-4);break;case _NALU_I_:{uint8_t * IFrameData = malloc(_naluSize+1);//IFrameData[0] = (_naluSize-3) >>24;IFrameData[1] = (_naluSize-3) >>16;IFrameData[2] = (_naluSize-3) >>8;IFrameData[3] = (_naluSize-3) &0xff;memcpy(IFrameData+4,_naluData+3,_naluSize-3);
//            if(!MP4WriteSample(recordCtx->m_mp4FHandle, recordCtx->m_vTrackId, IFrameData, _naluSize+1, recordCtx->m_vFrameDur/44100*90000, 0, 1)){
//                return -1;
//            }
//            recordCtx->m_vFrameDur = 0;if(!MP4WriteSample(recordCtx->m_mp4FHandle, recordCtx->m_vTrackId, IFrameData, _naluSize+1, MP4_INVALID_DURATION, 0, 1)){return -1;}free(IFrameData);//break;}case _NALU_P_:{_naluData[0] = (_naluSize-4) >>24;  _naluData[1] = (_naluSize-4) >>16;  _naluData[2] = (_naluSize-4) >>8;  _naluData[3] = (_naluSize-4) &0xff;//            if(!MP4WriteSample(recordCtx->m_mp4FHandle, recordCtx->m_vTrackId, _naluData, _naluSize, recordCtx->m_vFrameDur/44100*90000, 0, 1)){
//                return -1;
//            }
//            recordCtx->m_vFrameDur = 0;if(!MP4WriteSample(recordCtx->m_mp4FHandle, recordCtx->m_vTrackId, _naluData, _naluSize, MP4_INVALID_DURATION, 0, 1)){return -1;}break;}}return 0;
}int mp4AEncode(uint8_t * data ,int len){if(recordCtx->m_vTrackId == MP4_INVALID_TRACK_ID){return -1;}MP4WriteSample(recordCtx->m_mp4FHandle, recordCtx->m_aTrackId, data, len , MP4_INVALID_DURATION, 0, 1);recordCtx->m_vFrameDur += 1024;return 0;
}void closeMp4Encoder(){if(recordCtx){if (recordCtx->m_mp4FHandle != MP4_INVALID_FILE_HANDLE) {MP4Close(recordCtx->m_mp4FHandle,0);recordCtx->m_mp4FHandle = NULL;}free(recordCtx);recordCtx = NULL;}printf("ok  : closeMp4Encoder  \n");}

附：有网友提出编译不过，报错。

原因：需要添加系统库libc++.dylib，添加即可。

参考网址：

http://blog.csdn.net/skdkjzz/article/details/40506473

https://github.com/Thinkerfans/lib-mp4v2

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