mpeg4ip的Mp4v2库移植到android系统上，实现h264封装到mp4的容器内

     第一步： 首选从官网上下载mpeg4ip源代码，只要其中的lib/mp4v2目录下cpp源文件和.h头文件，和include目录下的mpeg4ip.h和mpeg4ip_version.h头文件。（我下的版本是1.6）。我这里处理了下，把源文件放到src目录下，头文件放到include目录下。

     第二步，源文件做少量修改。

        1、mpeg4ip.h文件中注释掉  #include <mpeg4ip_config.h>

        2、mp4file.cpp文件中的GetNumberOfTracks函数中修改。

        修改前：

        u_int32_t MP4File::GetNumberOfTracks(const char* type, u_int8_t subType)
        {
              if (type == NULL) {
               return m_pTracks.Size();
              } 

              u_int32_t typeSeen = 0;
              const char* normType = MP4NormalizeTrackType(type, m_verbosity);

             for (u_int32_t i = 0; i < m_pTracks.Size(); i++) {
                   if (!strcmp(normType, m_pTracks[i]->GetType())) {
                            if (subType) {
                                                          if (normType == MP4_AUDIO_TRACK_TYPE) {
                                                                   if (subType != GetTrackEsdsObjectTypeId(m_pTracks[i]->GetId())) {
                                                                          continue;
                                                                      }
                                                          } else if (normType == MP4_VIDEO_TRACK_TYPE) {
                                                                    if (subType != GetTrackEsdsObjectTypeId(m_pTracks[i]->GetId())) {
                                                                          continue;
                                                                     }
                                                           } 
                             // else unknown subtype, ignore it
                            }
                     typeSeen++;
                 }
            }
           return typeSeen;
       }

       修改后：

        u_int32_t MP4File::GetNumberOfTracks(const char* type, u_int8_t subType)
        {
              if (type == NULL) {
               return m_pTracks.Size();
              } 

              u_int32_t typeSeen = 0;
              const char* normType = MP4NormalizeTrackType(type, m_verbosity);

             for (u_int32_t i = 0; i < m_pTracks.Size(); i++) {
                   if (!strcmp(normType, m_pTracks[i]->GetType())) {
                            if (subType) {
                                                          if ( !strcmp(normType, MP4_AUDIO_TRACK_TYPE)) {
                                                                   if (subType != GetTrackEsdsObjectTypeId(m_pTracks[i]->GetId())) {
                                                                          continue;
                                                                      }
                                                          } else if ( !strcmp(normType, MP4_VIDEO_TRACK_TYPE) ) {
                                                                    if (subType != GetTrackEsdsObjectTypeId(m_pTracks[i]->GetId())) {
                                                                          continue;
                                                                     }
                                                           } 
                             // else unknown subtype, ignore it
                            }
                     typeSeen++;
                 }
            }
           return typeSeen;
       }

        MP4TrackId MP4File::FindTrackId(u_int16_t trackIndex, const char* type, u_int8_t subType)函数中字符串比较处做同样的修改。

    第三步：编写android.mk文件，这里要注意，因为android中默认的c++不支持异常处理，所以找到一个完整支持c++的标准c++静态库libstdc++.a，把libstdc++.a放到src目录下，且加上

LOCAL_SRC_FILES += libstdc++.a

LOCAL_LDFLAGS := $(LOCAL_PATH)/src/libstdc++.a 

还要加上

LOCAL_CPPFLAGS := -O2 -fexceptions -DHAVE_SOCKLEN_T -DHAVE_STRUCT_IOVEC

     第四步：源码状态下，mm编译。或者用ndk进行编译。

     第五步：调用库，进行封装。

   测试源代码（经过测试，封装的文件vlc能正常播放）

#include "mp4.h"

int main()
{
   unsigned char sps_pps[24] = {'\0'}; //存储sps和pps
   unsigned char buf[1024*100] = {'\0'};  //存储video数据
   int frameSize = 0;  //取过来的数据长度
   int ret;
   int sps_ppsLen = 0;  //sps和pps的总长度
   int id = start(); //打开数据流
   if(id <0 )
  {
    printf("open video fail %d\n",id);
    return -1;
   }
   ret = getsps(sps_pps,&sps_ppsLen);//取得sps和pps
   if(ret != 0)
   {
    printf("get sps and pps fail %d\n",ret);
    stop(id);
    return -1;
   }

   //创建mp4文件
   MP4FileHandle fileHandle = MP4CreateEx("/data/test.mp4",MP4_DETAILS_ALL,0,1,1,0,0,0,0);
   if(fileHandle == MP4_INVALID_FILE_HANDLE)
   {
    printf("creat mp4 file fail\n");
    stop(id);
    return -1;
   }

   //设置mp4文件的时间单位
    MP4SetTimeScale(fileHandle,90000);

  //创建视频track

   //根据ISO/IEC 14496-10 可知sps的第二个，第三个，第三个字节分别是 AVCProfileIndication,profile_compat,AVCLevelIndication

    MP4TrackId video = MP4AddH264VideoTrack(fileHandle,90000,90000/12,320,240,sps_pps[1],sps_pps[2],sps_pps[3],3);
   if(video == MP4_INVALID_TRACK_ID)
   {
    printf("creat video track fail\n");
    stop(id);
    MP4Close(fileHandle);
    return -1;
   }

  //设置sps和pps
   MP4AddH264SequenceParameterSet(fileHandle,video,sps_pps,sps_ppsLen-5);
   MP4AddH264PictureParameterSet(fileHandle,video,sps_pps+sps_ppsLen-5,5);
   int count = 0;
   int num = 0;
   while(count < 5000)
   {
       while(ret = thakral_getframe(id,buf+4,&frameSize,&num))
      {
        printf("get frame fail %d\n",ret);
       usleep(90*1000);
       }

     //由于传过来的数据没有0x00000001这样的头，都是纯数据，而mp4中的nal结构是 nal长度+nal数据
      int nalsize = frameSize;
      buf[0] = (nalsize&0xff000000)>>24;
      buf[1] = (nalsize&0x00ff0000)>>16;
      buf[2] = (nalsize&0x0000ff00)>>8;
      buf[3] = nalsize&0x000000ff;
      MP4WriteSample(fileHandle,video,buf,frameSize+4,MP4_INVALID_DURATION,0,true);
      count++;
     usleep(85*1000);
    }
    stop(id);
    MP4Close(fileHandle);
   return 0;
 }