linux下利用mp4v2库将h264和aac文件封装成MP4

说在前面的是，我用的mp4v2版本是mp4v2-2.2.0，与之前版本相比接口函数稍有不同！

1. 首先调用MP4CreateEx（）函数，创建输出的MP4文件

MP4FileHandle  file = MP4CreateEx("test.mp4", 0, 1, 1, "isom", 0x00000200, p, 4);

2. 接下来设置timescale

MP4SetTimeScale(file, 90000);

3. 接下来添加video track

MP4TrackId video = MP4AddH264VideoTrack(file, 90000, 90000/25, 640, 480,
0x4d, //sps[1] AVCProfileIndication
0x40, //sps[2] profile_compat
0x1f, //sps[3] AVCLevelIndication
3); // 4 bytes length before each NAL unit

MP4SetVideoProfileLevel(file, 0x7F); 

4. 接下来添加audio track

MP4TrackId audio = MP4AddAudioTrack(file, 16000, 1024, MP4_MPEG4_AUDIO_TYPE);

MP4SetAudioProfileLevel(file, 0x2);

5. 现在创建工作结束了，之后就是循环写入video和audio数据，写video和audio的函数分别是

MP4WriteSample(file, video, buf, size, MP4_INVALID_DURATION, 0, 1);

MP4WriteSample(file, audio, buf, size, MP4_INVALID_DURATION, 0, 1); 

6. 接下来需要为video添加SPS和PPS信息

MP4AddH264SequenceParameterSet(file, video, sps_pps, 10);
MP4AddH264PictureParameterSet(file, video, sps_pps+10, 4);

7.最后遍历为MP4添加索引

MP4Close(file, 0);

以上为mp4库的调用流程，video和audio的buf需要自己写测试函数传进来，SPS和PPS需要预先知道。

int aa(void)
{
unsigned char sps_pps[14] = {0x67, 0x4d, 0x40, 0x1F, 0x96 ,0x54, 0x05, 0x01, 0xec, 0x80, 0x68, 0xce, 0x38, 0x80};
char *p[4];
p[0] = "isom";
p[1] = "iso2";
p[2] = "avc1";
p[3] = "mp41";
MP4FileHandle file = MP4CreateEx("test.mp4", 0, 1, 1, "isom", 0x00000200, p, 4);

if (file == MP4_INVALID_FILE_HANDLE)
{
printf("open file fialed.\n");
return;
}
MP4SetTimeScale(file, 90000);

//添加h264 track
MP4TrackId video = MP4AddH264VideoTrack(file, 90000, 90000/25, 640, 480,
0x4d, //sps[1] AVCProfileIndication
0x40, //sps[2] profile_compat
0x1f, //sps[3] AVCLevelIndication
3); // 4 bytes length before each NAL unit
if (video == MP4_INVALID_TRACK_ID)
{
printf("add video track failed.\n");
return;
}
MP4SetVideoProfileLevel(file, 0x7F);

//添加aac音频
MP4TrackId audio = MP4AddAudioTrack(file, 16000, 1024, MP4_MPEG4_AUDIO_TYPE);
if (video == MP4_INVALID_TRACK_ID)
{
printf("add audio track failed.\n");
return;
}
MP4SetAudioProfileLevel(file, 0x2);

while(mp4_read_h264_frame(fpMjpeg, buf, MP4_BUF_SIZE, &size) != -1)
{
buf[0] = ((size-4) & 0xff000000) >> 24;
buf[1] = ((size-4) & 0x00ff0000) >> 16;
buf[2] = ((size-4) & 0x0000ff00) >> 8;
buf[3] = (size-4) & 0x000000ff;
MP4WriteSample(file, video, buf, size, MP4_INVALID_DURATION, 0, 1);
}

while(-1 != mp4_read_aac_frame(fpPcm, buf, MP4_BUF_SIZE, &size))
{
MP4WriteSample(file, audio, buf, size, MP4_INVALID_DURATION, 0, 1);
}

MP4AddH264SequenceParameterSet(file, video, sps_pps, 10); MP4AddH264PictureParameterSet(file, video, sps_pps+10, 4);

MP4Close(file, 0);

return 0;
}