前面已經介紹過EasyRTMP，這裡不再多說，可以網上搜索相關內容。

本文講述下基於libEasyRTMP推送庫實現的MP4檔案的直播推送。Github中Demo的下載地址https://github.com/EasyDarwin/EasyRTMP。Demo中EasyRTMP_FILE的工程是將MP4檔案進行解析推送。主要使用MP4Demux進行解析，分別獲取到音訊流和視訊流，再利用libEasyRTMP進行RTMP推送，這樣就可以達到直播或者點播的效果了。

首先獲取音視訊編碼資訊，判斷MP4檔案是否儲存音訊軌和視訊軌

    //從MP4檔案獲取音視訊編碼資訊，填入pusher媒體資訊結構中
    CMp4_avcC_box videoInfo;
    memset
 
(&videoInfo, 0x00, sizeof(CMp4_avcC_box));
    CMp4_mp4a_box audioInfo;
    memset(&audioInfo, 0x00, sizeof(CMp4_mp4a_box));
    int nVideoTrackId = get_video_info_in_moov(g_root,  videoInfo );
    int nAudioTrackId = get_audio_info_in_moov(g_root,  audioInfo );

如果存在音訊軌、視訊軌就起執行緒進行資料流獲取並傳給libEasyRTMP進行推送

    //視訊軌存在
    if (nVideoTrackId>-1)
    {
        mediainfo.u32VideoCodec =   EASY_SDK_VIDEO_CODEC_H264;
        mediainfo.u32VideoFps = 25;
        mediainfo.u32H264SpsLength = videoInfo.sps->sequenceParameterSetLength;
        mediainfo.u32H264PpsLength = videoInfo.pps->pictureParameterSetLength;
 

        if (videoInfo.sps->sequenceParameterSetNALUnit && videoInfo.sps->sequenceParameterSetLength>0 )
        {
            memcpy(mediainfo.u8H264Sps, videoInfo.sps->sequenceParameterSetNALUnit, mediainfo.u32H264SpsLength);
        }
        if (videoInfo.pps->pictureParameterSetNALUnit && videoInfo.pps->pictureParameterSetLength>0 )
        {
            memcpy(mediainfo.u8H264Pps, videoInfo.pps->pictureParameterSetNALUnit, mediainfo.u32H264PpsLength );
        }

        g_mp4TrackThread[nVideoTrackId] = (HANDLE)_beginthreadex(NULL, 0, VideoThread, (void*)nVideoTrackId,0,0);
        g_bThreadLiving[nVideoTrackId] = true;
    }

    //音訊軌存在
    if (nAudioTrackId>-1)
    {
        mediainfo.u32AudioCodec =   EASY_SDK_AUDIO_CODEC_AAC;
        mediainfo.u32AudioSamplerate = audioInfo.samplerate;
        mediainfo.u32AudioChannel = audioInfo.channelcount;

        //Create thread to push mp4 demux data( aac)
        g_mp4TrackThread[nAudioTrackId] = (HANDLE)_beginthreadex(NULL, 0, AudioThread,  (void*)nAudioTrackId,0,0);
        g_bThreadLiving[nAudioTrackId] = true;
    }

主要的部分就是MP4Demux的使用，Demo中提供了程式碼，可自行學習。

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