Android 使用Rtmp音视频推流

http://blog.csdn.net/a992036795/article/details/54583571

前言

本文介绍的是使用Android摄像头、麦克风采集的音、视频进行编码。然后通过librtmp推送到流媒体服务器上的功能。 
我所使用的环境：Android Studio 2.2.3 、NDK13。

流程

使用到的Api

• 音视频采集用到的api有：Camera、AudioRecord
• 编码用的是系统提供的API:MediaCodec (硬编码)
• 推送使用的开源库:librtmp。

代码

ManActivity.Java

public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback2 {    static final int NAL_SLICE = 1;    static final int NAL_SLICE_DPA = 2;    static final int NAL_SLICE_DPB = 3;    static final int NAL_SLICE_DPC = 4;    static final int NAL_SLICE_IDR = 5;    static final int NAL_SEI = 6;    static final int NAL_SPS = 7;    static final int NAL_PPS = 8;    static final int NAL_AUD = 9;    static final int NAL_FILLER = 12;    private static final String TAG = "MainActivity";    public static final String url = "rtmp://192.168.155.1:1935/live/test";    private Button btnToggle;    private SurfaceView mSurfaceView;    private SurfaceHolder mSurfaceHolder;    private Camera mCamera;    private Camera.Size previewSize;    private long presentationTimeUs;    MediaCodec vencoder;    private Thread recordThread;    private boolean aLoop;    private AudioRecord mAudioRecord;    private byte[] aBuffer;    private MediaCodec aencoder;    private int aSampleRate;    private int aChanelCount;    private int colorFormat;    private MediaCodec.BufferInfo aBufferInfo = new MediaCodec.BufferInfo();    private MediaCodec.BufferInfo vBufferInfo = new MediaCodec.BufferInfo();    private boolean isPublished;    private RtmpPublisher mRtmpPublisher = new RtmpPublisher();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();    }    private void initView() {        btnToggle = (Button) findViewById(R.id.btn_toggle);        mSurfaceView = (SurfaceView) findViewById(R.id.surface_view);        mSurfaceHolder = mSurfaceView.getHolder();        mSurfaceHolder.addCallback(this);        btnToggle.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                switchPublish();            }        });    }    private void switchPublish() {        if (isPublished) {            stop();        } else {            start();        }        btnToggle.setText(isPublished ? "停止" : "开始");    }    private void start() {        //初始化        mRtmpPublisher.init(url, previewSize.width, previewSize.height, 5);        isPublished = true;        initAudioDevice();        try {            vencoder = initVideoEncoder();        } catch (IOException e) {            e.printStackTrace();            throw new RuntimeException("video encoder init fail");        }        try {            aencoder = initAudioEncoder();        } catch (IOException e) {            e.printStackTrace();            throw new RuntimeException("audio encoder init fail");        }        //开启录音        aLoop = true;        recordThread = new Thread(fetchAudioRunnable());        presentationTimeUs = new Date().getTime() * 1000;        mAudioRecord.startRecording();        recordThread.start();        if (aencoder != null) {            aencoder.start();        }        if (vencoder != null) {            vencoder.start();        }    }    private void stop() {        isPublished = false;        mRtmpPublisher.stop();        aLoop = false;        if (recordThread != null) {            recordThread.interrupt();        }        mAudioRecord.stop();        mAudioRecord.release();        vencoder.stop();        vencoder.release();        aencoder.stop();        aencoder.release();    }    private Runnable fetchAudioRunnable() {        return new Runnable() {            @Override            public void run() {                fetchPcmFromDevice();            }        };    }    private void fetchPcmFromDevice() {        Log.d(TAG, "录音线程开始");        while (aLoop && mAudioRecord != null && !Thread.interrupted()) {            int size = mAudioRecord.read(aBuffer, 0, aBuffer.length);            if (size < 0) {                Log.i(TAG, "audio ignore ,no data to read");                break;            }            if (aLoop) {                byte[] audio = new byte[size];                System.arraycopy(aBuffer, 0, audio, 0, size);                onGetPcmFrame(audio);            }        }    }    private void initAudioDevice() {        int[] sampleRates = {44100, 22050, 16000, 11025};        for (int sampleRate :                sampleRates) {            //编码制式            int audioFormat = AudioFormat.ENCODING_PCM_16BIT;            // stereo 立体声，            int channelConfig = AudioFormat.CHANNEL_CONFIGURATION_STEREO;            int buffsize = 2 * AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat);            mAudioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRate, channelConfig,                    audioFormat, buffsize);            if (mAudioRecord.getState() != AudioRecord.STATE_INITIALIZED) {                continue;            }            aSampleRate = sampleRate;            aChanelCount = channelConfig == AudioFormat.CHANNEL_CONFIGURATION_STEREO ? 2 : 1;            aBuffer = new byte[Math.min(4096, buffsize)];        }    }    private MediaCodec initAudioEncoder() throws IOException {        MediaCodec aencoder = MediaCodec.createEncoderByType(MediaFormat.MIMETYPE_AUDIO_AAC);        MediaFormat format = MediaFormat.createAudioFormat(MediaFormat.MIMETYPE_AUDIO_AAC,                aSampleRate, aChanelCount);        format.setInteger(KEY_MAX_INPUT_SIZE, 0);        format.setInteger(KEY_BIT_RATE, 1000 * 30);        aencoder.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);        return aencoder;    }    private MediaCodec initVideoEncoder() throws IOException {        // 初始化        MediaCodecInfo mediaCodecInfo = getMediaCodecInfoByType(MediaFormat.MIMETYPE_VIDEO_AVC);        colorFormat = getColorFormat(mediaCodecInfo);        MediaCodec vencoder = MediaCodec.createByCodecName(mediaCodecInfo.getName());        MediaFormat format = MediaFormat.createVideoFormat(MediaFormat.MIMETYPE_VIDEO_AVC,                previewSize.width, previewSize.height);        format.setInteger(KEY_MAX_INPUT_SIZE, 0);        format.setInteger(KEY_BIT_RATE, 700 * 1000);        format.setInteger(KEY_COLOR_FORMAT, colorFormat);        format.setInteger(KEY_FRAME_RATE, 20);        format.setInteger(KEY_I_FRAME_INTERVAL, 5);        vencoder.configure(format, null, null, CONFIGURE_FLAG_ENCODE);        return vencoder;    }    public static MediaCodecInfo getMediaCodecInfoByType(String mimeType) {        for (int i = 0; i < MediaCodecList.getCodecCount(); i++) {            MediaCodecInfo codecInfo = MediaCodecList.getCodecInfoAt(i);            if (!codecInfo.isEncoder()) {                continue;            }            String[] types = codecInfo.getSupportedTypes();            for (int j = 0; j < types.length; j++) {                if (types[j].equalsIgnoreCase(mimeType)) {                    return codecInfo;                }            }        }        return null;    }    public static int getColorFormat(MediaCodecInfo mediaCodecInfo) {        int matchedForamt = 0;        MediaCodecInfo.CodecCapabilities codecCapabilities =                mediaCodecInfo.getCapabilitiesForType(MediaFormat.MIMETYPE_VIDEO_AVC);        for (int i = 0; i < codecCapabilities.colorFormats.length; i++) {            int format = codecCapabilities.colorFormats[i];            if (format >= codecCapabilities.COLOR_FormatYUV420Planar &&                    format <= codecCapabilities.COLOR_FormatYUV420PackedSemiPlanar                    ) {                if (format >= matchedForamt) {                    matchedForamt = format;                }            }        }        return matchedForamt;    }    private void initCamera() {        openCamera();        setCameraParameters();        setCameraDisplayOrientation(this, Camera.CameraInfo.CAMERA_FACING_BACK, mCamera);        try {            mCamera.setPreviewDisplay(mSurfaceHolder);        } catch (IOException e) {            e.printStackTrace();        }        mCamera.setPreviewCallbackWithBuffer(getPreviewCallback());        mCamera.addCallbackBuffer(new byte[calculateFrameSize(ImageFormat.NV21)]);        mCamera.startPreview();    }    private int calculateFrameSize(int format) {        return previewSize.width * previewSize.height * ImageFormat.getBitsPerPixel(format) / 8;    }    public static void setCameraDisplayOrientation(Activity activity,                                                   int cameraId, android.hardware.Camera camera) {        android.hardware.Camera.CameraInfo info =                new android.hardware.Camera.CameraInfo();        android.hardware.Camera.getCameraInfo(cameraId, info);        int rotation = activity.getWindowManager().getDefaultDisplay()                .getRotation();        int degrees = 0;        switch (rotation) {            case Surface.ROTATION_0:                degrees = 0;                break;            case Surface.ROTATION_90:                degrees = 90;                break;            case Surface.ROTATION_180:                degrees = 180;                break;            case Surface.ROTATION_270:                degrees = 270;                break;        }        int result;        if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {            result = (info.orientation + degrees) % 360;            result = (360 - result) % 360;  // compensate the mirror        } else {  // back-facing            result = (info.orientation - degrees + 360) % 360;        }        camera.setDisplayOrientation(result);    }    private void setCameraParameters() {        Camera.Parameters parameters = mCamera.getParameters();        List<Camera.Size> supportedPreviewSizes = parameters.getSupportedPreviewSizes();        for (Camera.Size size : supportedPreviewSizes                ) {            if (size.width >= 320 && size.width <= 720) {                previewSize = size;                Log.d(TAG, String.format("find preview size width=%d,height=%d", previewSize.width,                        previewSize.height));                break;            }        }        int[] destRange = {25 * 1000, 45 * 1000};        List<int[]> supportedPreviewFpsRange = parameters.getSupportedPreviewFpsRange();        for (int[] range : supportedPreviewFpsRange                ) {            if (range[PREVIEW_FPS_MIN_INDEX] <= 45 * 1000 && range[PREVIEW_FPS_MAX_INDEX] >= 25 * 1000) {                destRange = range;                Log.d(TAG, String.format("find fps range :%s", Arrays.toString(destRange)));                break;            }        }        parameters.setPreviewSize(previewSize.width, previewSize.height);        parameters.setPreviewFpsRange(destRange[PREVIEW_FPS_MIN_INDEX],                destRange[PREVIEW_FPS_MAX_INDEX]);        parameters.setFocusMode(FOCUS_MODE_AUTO);        parameters.setPreviewFormat(ImageFormat.NV21);        parameters.setRotation(onOrientationChanged(0));        mCamera.setParameters(parameters);    }    public int onOrientationChanged(int orientation) {        android.hardware.Camera.CameraInfo info =                new android.hardware.Camera.CameraInfo();        android.hardware.Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_BACK, info);        orientation = (orientation + 45) / 90 * 90;        int rotation = 0;        if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {            rotation = (info.orientation - orientation + 360) % 360;        } else {  // back-facing camera            rotation = (info.orientation + orientation) % 360;        }        return rotation;    }    private void openCamera() {        if (mCamera == null) {            try {                mCamera = Camera.open();            } catch (Exception e) {                e.printStackTrace();                Toast.makeText(this, "打开摄像头失败", Toast.LENGTH_SHORT).show();                try {                    Thread.sleep(3000);                } catch (InterruptedException e1) {                    e1.printStackTrace();                }                throw new RuntimeException("打开摄像头失败", e);            }        }    }    @Override    protected void onResume() {        super.onResume();        initCamera();    }    @Override    protected void onPause() {        super.onPause();        if (mCamera != null) {            mCamera.setPreviewCallbackWithBuffer(null);            mCamera.stopPreview();            mCamera.release();            mCamera = null;        }    }    @Override    public void surfaceRedrawNeeded(SurfaceHolder holder) {    }    @Override    public void surfaceCreated(SurfaceHolder holder) {    }    @Override    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {        initCamera();    }    @Override    public void surfaceDestroyed(SurfaceHolder holder) {    }    public Camera.PreviewCallback getPreviewCallback() {        return new Camera.PreviewCallback() {            byte[] dstByte = new byte[calculateFrameSize(ImageFormat.NV21)];            @Override            public void onPreviewFrame(byte[] data, Camera camera) {                if (data != null) {                    if (isPublished) {                        // data 是Nv21                        if (colorFormat == MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar) {                            Yuv420Util.Nv21ToYuv420SP(data, dstByte, previewSize.width, previewSize.height);                        } else if (colorFormat == MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar) {                            Yuv420Util.Nv21ToI420(data, dstByte, previewSize.width, previewSize.height);                        } else if (colorFormat == MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Flexible) {                            // Yuv420_888                        } else if (colorFormat == MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420PackedPlanar) {                            // Yuv420packedPlannar 和 yuv420sp很像                            // 区别在于 加入 width = 4的话 y1,y2,y3 ,y4公用 u1v1                            // 而 yuv420dp 则是 y1y2y5y6 共用 u1v1                            //http://blog.csdn.net/jumper511/article/details/21719313                            //这样处理的话颜色核能会有些失真。                            Yuv420Util.Nv21ToYuv420SP(data, dstByte, previewSize.width, previewSize.height);                        } else {                            System.arraycopy(data, 0, dstByte, 0, data.length);                        }                        onGetVideoFrame(dstByte);                    }                    camera.addCallbackBuffer(data);                } else {                    camera.addCallbackBuffer(new byte[calculateFrameSize(ImageFormat.NV21)]);                }            }        };    }    private void onGetVideoFrame(byte[] dstByte) {        ByteBuffer[] inputBuffers = vencoder.getInputBuffers();        ByteBuffer[] outputBuffers = vencoder.getOutputBuffers();        int inputBufferId = vencoder.dequeueInputBuffer(-1);        if (inputBufferId >= 0) {            // fill inputBuffers[inputBufferId] with valid data            ByteBuffer bb = inputBuffers[inputBufferId];            bb.clear();            bb.put(dstByte, 0, dstByte.length);            long pts = new Date().getTime() * 1000 - presentationTimeUs;            vencoder.queueInputBuffer(inputBufferId, 0, dstByte.length, pts, 0);        }        for (; ; ) {            int outputBufferId = vencoder.dequeueOutputBuffer(vBufferInfo, 0);            if (outputBufferId >= 0) {                // outputBuffers[outputBufferId] is ready to be processed or rendered.                ByteBuffer bb = outputBuffers[outputBufferId];                onEncodedAvcFrame(bb, vBufferInfo);                vencoder.releaseOutputBuffer(outputBufferId, false);            }            if (outputBufferId < 0) {                break;            }        }    }    private void onGetPcmFrame(byte[] data) {        ByteBuffer[] inputBuffers = aencoder.getInputBuffers();        ByteBuffer[] outputBuffers = aencoder.getOutputBuffers();        int inputBufferId = aencoder.dequeueInputBuffer(-1);        if (inputBufferId >= 0) {            ByteBuffer bb = inputBuffers[inputBufferId];            bb.clear();            bb.put(data, 0, data.length);            long pts = new Date().getTime() * 1000 - presentationTimeUs;            aencoder.queueInputBuffer(inputBufferId, 0, data.length, pts, 0);        }        for (; ; ) {            int outputBufferId = aencoder.dequeueOutputBuffer(aBufferInfo, 0);            if (outputBufferId >= 0) {                // outputBuffers[outputBufferId] is ready to be processed or rendered.                ByteBuffer bb = outputBuffers[outputBufferId];                onEncodeAacFrame(bb, aBufferInfo);                aencoder.releaseOutputBuffer(outputBufferId, false);            }            if (outputBufferId < 0) {                break;            }        }    }    private void onEncodedAvcFrame(ByteBuffer bb, MediaCodec.BufferInfo vBufferInfo) {        int offset = 4;        //判断帧的类型        if (bb.get(2) == 0x01) {            offset = 3;        }        int type = bb.get(offset) & 0x1f;        if (type == NAL_SPS) {            //[0, 0, 0, 1, 103, 66, -64, 13, -38, 5, -126, 90, 1, -31, 16, -115, 64, 0, 0, 0, 1, 104, -50, 6, -30]            //打印发现这里将 SPS帧和 PPS帧合在了一起发送            // SPS为 [4，len-8]            // PPS为后4个字节            //so .            byte[] pps = new byte[4];            byte[] sps = new byte[vBufferInfo.size - 12];            bb.getInt();// 抛弃 0,0,0,1            bb.get(sps, 0, sps.length);            bb.getInt();            bb.get(pps, 0, pps.length);            Log.d(TAG, "解析得到 sps:" + Arrays.toString(sps) + ",PPS=" + Arrays.toString(pps));            mRtmpPublisher.sendSpsAndPps(sps, sps.length, pps, pps.length,                    vBufferInfo.presentationTimeUs / 1000);        } else {            byte[] bytes = new byte[vBufferInfo.size];            bb.get(bytes);            mRtmpPublisher.sendVideoData(bytes, bytes.length,                    vBufferInfo.presentationTimeUs / 1000);        }    }    private void onEncodeAacFrame(ByteBuffer bb, MediaCodec.BufferInfo aBufferInfo) {        // 1.界定符 FF F1        // 2.加上界定符的前7个字节是帧描述信息        // 3.AudioDecoderSpecificInfo 长度为2个字节如果是44100 改值为0x1210        //http://blog.csdn.net/avsuper/article/details/24661533        //http://www.tuicool.com/articles/aYvmua        if (aBufferInfo.size == 2) {//            https://my.oschina.net/zhangxu0512/blog/204070//            faacEncSetConfiguration(m_hEncoder, pConfiguration);//            int ret = faacEncGetDecoderSpecificInfo(m_hEncoder, &m_pSpc, &m_nSpc);//            //AAC sequence header//            int[] mpeg4audio_sample_rates = {//                    96000, 88200, 64000, 48000, 44100, 32000,//                    24000, 22050, 16000, 12000, 11025, 8000, 7350//            };////            int m_keyframe[] = new int[2];//            //get keyframe info.//            int index;//            for (index = 0; index < 16; index++) {//                if (aSampleRate == mpeg4audio_sample_rates[index]) {//                    break;//                }//            }//            m_keyframe[0] = 0x02 << 3 | index >> 1;//            m_keyframe[1] = (index & 0x01) << 7 | aChanelCount << 3;////            Log.d(TAG,"挂件"+Arrays.toString(m_keyframe));            // 我打印发现，这里应该已经是吧关键帧计算好了，所以我们直接发送            byte[] bytes = new byte[2];            bb.get(bytes);            mRtmpPublisher.sendAacSpec(bytes,2);        }else{            byte[] bytes = new byte[aBufferInfo.size];            bb.get(bytes);            mRtmpPublisher.sendAacData(bytes,bytes.length,aBufferInfo.presentationTimeUs/1000);        }    }   }
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MainActivity 中的代码主要是采集视频、音频进行编码。然后调用jni方法进行发送。 
在c层。我封装了一个类用来发送音视频数据：

class Rtmp {private:    int width;    int height;    int timeOut;    std::string url;    long startTime;    RTMP *rtmp;public:    /**     * 初始化     */    virtual int init(std::string url, int w, int h, int timeOut);    /**     * 发送sps、pps 帧     */    virtual int sendSpsAndPps(BYTE *sps, int spsLen, BYTE *pps, int ppsLen,                              long timestamp);    /**     * 发送视频帧     */    virtual int sendVideoData(BYTE *data, int len, long timestamp);    /**     * 发送音频关键帧     */    virtual int sendAacSpec(BYTE *data, int len);    /**     * 发送音频数据     */    virtual int sendAacData(BYTE *data, int len,long timestamp);    /**     * 释放资源     */    virtual int stop() const;    virtual ~Rtmp();};
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实现：

//// Created by Administrator on 1/16/2017.//#include "Rtmp.h"#include "jni.h"#include "lang.h"#define RTMP_HEAD_SIZE (sizeof(RTMPPacket)+RTMP_MAX_HEADER_SIZE)#define NAL_SLICE  1#define NAL_SLICE_DPA  2#define NAL_SLICE_DPB  3#define NAL_SLICE_DPC  4#define NAL_SLICE_IDR  5#define NAL_SEI  6#define NAL_SPS  7#define NAL_PPS  8#define NAL_AUD  9#define NAL_FILLER  12#define STREAM_CHANNEL_METADATA  0x03#define STREAM_CHANNEL_VIDEO     0x04#define STREAM_CHANNEL_AUDIO     0x05int Rtmp::init(std::string url, int w, int h, int timeOut) {    this->url = url;    this->width = w;    this->height = h;    this->timeOut = timeOut;    RTMP_LogSetLevel(RTMP_LOGDEBUG);    rtmp = RTMP_Alloc();    RTMP_Init(rtmp);    rtmp->Link.timeout = timeOut;    RTMP_SetupURL(rtmp, (char *) url.c_str());    RTMP_EnableWrite(rtmp);    if (RTMP_Connect(rtmp, NULL) <= 0) {        LOGD("RTMP_Connect error");        return -1;    }    if (RTMP_ConnectStream(rtmp, 0) <= 0) {        LOGD("RTMP_ConnectStream error");        return -1;    }    return 0;}int Rtmp::sendSpsAndPps(BYTE *sps, int spsLen, BYTE *pps, int ppsLen, long timestamp) {    int i;    RTMPPacket *packet = (RTMPPacket *) malloc(RTMP_HEAD_SIZE + 1024);    memset(packet, 0, RTMP_HEAD_SIZE);    packet->m_body = (char *) packet + RTMP_HEAD_SIZE;    BYTE *body = (BYTE *) packet->m_body;    i = 0;    body[i++] = 0x17; //1:keyframe 7:AVC    body[i++] = 0x00; // AVC sequence header    body[i++] = 0x00;    body[i++] = 0x00;    body[i++] = 0x00; //fill in 0    /*AVCDecoderConfigurationRecord*/    body[i++] = 0x01;    body[i++] = sps[1]; //AVCProfileIndecation    body[i++] = sps[2]; //profile_compatibilty    body[i++] = sps[3]; //AVCLevelIndication    body[i++] = 0xff;//lengthSizeMinusOne    /*SPS*/    body[i++] = 0xe1;    body[i++] = (spsLen >> 8) & 0xff;    body[i++] = spsLen & 0xff;    /*sps data*/    memcpy(&body[i], sps, spsLen);    i += spsLen;    /*PPS*/    body[i++] = 0x01;    /*sps data length*/    body[i++] = (ppsLen >> 8) & 0xff;    body[i++] = ppsLen & 0xff;    memcpy(&body[i], pps, ppsLen);    i += ppsLen;    packet->m_packetType = RTMP_PACKET_TYPE_VIDEO;    packet->m_nBodySize = i;    packet->m_nChannel = 0x04;    packet->m_nTimeStamp = 0;    packet->m_hasAbsTimestamp = 0;    packet->m_headerType = RTMP_PACKET_SIZE_MEDIUM;    packet->m_nInfoField2 = rtmp->m_stream_id;    /*发送*/    if (RTMP_IsConnected(rtmp)) {        RTMP_SendPacket(rtmp, packet, TRUE);    }    free(packet);    return 0;}int Rtmp::sendVideoData(BYTE *buf, int len, long timestamp) {    int type;    /*去掉帧界定符*/    if (buf[2] == 0x00) {/*00 00 00 01*/        buf += 4;        len -= 4;    } else if (buf[2] == 0x01) {        buf += 3;        len - 3;    }    type = buf[0] & 0x1f;    RTMPPacket *packet = (RTMPPacket *) malloc(RTMP_HEAD_SIZE + len + 9);    memset(packet, 0, RTMP_HEAD_SIZE);    packet->m_body = (char *) packet + RTMP_HEAD_SIZE;    packet->m_nBodySize = len + 9;    /* send video packet*/    BYTE *body = (BYTE *) packet->m_body;    memset(body, 0, len + 9);    /*key frame*/    body[0] = 0x27;    if (type == NAL_SLICE_IDR) {        body[0] = 0x17; //关键帧    }    body[1] = 0x01;/*nal unit*/    body[2] = 0x00;    body[3] = 0x00;    body[4] = 0x00;    body[5] = (len >> 24) & 0xff;    body[6] = (len >> 16) & 0xff;    body[7] = (len >> 8) & 0xff;    body[8] = (len) & 0xff;    /*copy data*/    memcpy(&body[9], buf, len);    packet->m_hasAbsTimestamp = 0;    packet->m_packetType = RTMP_PACKET_TYPE_VIDEO;    packet->m_nInfoField2 = rtmp->m_stream_id;    packet->m_nChannel = 0x04;    packet->m_headerType = RTMP_PACKET_SIZE_LARGE;    packet->m_nTimeStamp = timestamp;    if (RTMP_IsConnected(rtmp)) {        RTMP_SendPacket(rtmp, packet, TRUE);    }    free(packet);    return 0;}int Rtmp::sendAacSpec(BYTE *data, int spec_len) {    RTMPPacket *packet;    BYTE *body;    int len = spec_len;//spec len 是2    packet = (RTMPPacket *) malloc(RTMP_HEAD_SIZE + len + 2);    memset(packet, 0, RTMP_HEAD_SIZE);    packet->m_body = (char *) packet + RTMP_HEAD_SIZE;    body = (BYTE *) packet->m_body;    /*AF 00 +AAC RAW data*/    body[0] = 0xAF;    body[1] = 0x00;    memcpy(&body[2], data, len);/*data 是AAC sequeuece header数据*/    packet->m_packetType = RTMP_PACKET_TYPE_AUDIO;    packet->m_nBodySize = len + 2;    packet->m_nChannel = STREAM_CHANNEL_AUDIO;    packet->m_nTimeStamp = 0;    packet->m_hasAbsTimestamp = 0;    packet->m_headerType = RTMP_PACKET_SIZE_LARGE;    packet->m_nInfoField2 = rtmp->m_stream_id;    if (RTMP_IsConnected(rtmp)) {        RTMP_SendPacket(rtmp, packet, TRUE);    }    free(packet);    return 0;}int Rtmp::sendAacData(BYTE *data, int len, long timeOffset) {//    data += 5;//    len += 5;    if (len > 0) {        RTMPPacket *packet;        BYTE *body;        packet = (RTMPPacket *) malloc(RTMP_HEAD_SIZE + len + 2);        memset(packet, 0, RTMP_HEAD_SIZE);        packet->m_body = (char *) packet + RTMP_HEAD_SIZE;        body = (BYTE *) packet->m_body;        /*AF 00 +AAC Raw data*/        body[0] = 0xAF;        body[1] = 0x01;        memcpy(&body[2], data, len);        packet->m_packetType = RTMP_PACKET_TYPE_AUDIO;        packet->m_nBodySize = len + 2;        packet->m_nChannel = STREAM_CHANNEL_AUDIO;        packet->m_nTimeStamp = timeOffset;        packet->m_hasAbsTimestamp = 0;        packet->m_headerType = RTMP_PACKET_SIZE_LARGE;        packet->m_nInfoField2 = rtmp->m_stream_id;        if (RTMP_IsConnected(rtmp)) {            RTMP_SendPacket(rtmp, packet, TRUE);        }        LOGD("send packet body[0]=%x,body[1]=%x", body[0], body[1]);        free(packet);    }    return 0;}int Rtmp::stop() const {    RTMP_Close(rtmp);    RTMP_Free(rtmp);    return 0;}Rtmp::~Rtmp() { stop(); }
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观看

我们如果测试的话，我们首先需要搭建一个流媒体服务器。可以在本地安装一个Adobe Media Server 。然后打开它其中的一个示例。比如我安装在D盘Program File 文件夹下 
那么我打开D:\Program Files\Adobe\Adobe Media Server 5\samples\videoPlayer\videoplayer.html 
输入推流的地址就可以播放了。当然手机和电脑记得处于同一个局域网。 

完整代码地址 https://github.com/blueberryCoder/LiveStream