[流媒体]Android(安卓)实时视频采集—MediaRecoder录制

http://www.cnblogs.com/skyseraph/archive/2012/03/31/2427593.html

0 啰嗦

　　本篇的存在只是为系列的连贯性，其实在前面系列博文中对MediaRecoder已有用到，详见前面Android系列博文Android(19)

1 概述

　　通过Android的MediaRecorder，在SetoutputFile函数中绑定LocalSocket实现

2 知识点

① MediaRecoder使用

　　参考【Android學習專題】多媒體篇：MediaRecorder 实现录音机

② LocalSocket使用

　　在手机中实现数据的边发送边接收。

详细参考：http://api.apkbus.com/reference/android/net/LocalSocket.html

http://api.apkbus.com/reference/android/net/LocalServerSocket.html

3 核心源码

① SurfaceView相关

　　参考【流媒體】Android 实时视频采集—Camera预览采集和【Android學習專題】多媒體篇：MediaRecorder 实现录音机

② Init LocalSocket

    private void initLocalSocket()    {        receiver = new LocalSocket();        try        {            lss = new LocalServerSocket("H264");            receiver.connect(new LocalSocketAddress("H264"));            receiver.setReceiveBufferSize(500000);            receiver.setSendBufferSize(500000);            sender = lss.accept();            sender.setReceiveBufferSize(500000);            sender.setSendBufferSize(500000);        } catch (IOException e1)        {            e1.printStackTrace();            Log.e("", "localSocket error:" + e1.getMessage());        }    }

③ MediaRecorder相关

参考：【Android學習專題】多媒體篇：MediaRecoder 实现录像机和【Android學習專題】多媒體篇：MediaRecorder 实现录音机

另附initiativeVideo核心模块

private boolean initializeVideo()    {        try        {            Log.i(TAG,"##initializeVideo....");            // 〇state: Initial 实例化MediaRecorder对象            if (mSurfaceView == null)            {                Log.e(TAG,"mSurfaceView is null in initializeVideo");                return false;            }            if(mMediaRecorder == null)                mMediaRecorder = new MediaRecorder();            else                mMediaRecorder.reset();                                                // 〇state: Initial=>Initialized            // set audio source as Microphone, video source as camera            // specified before settings Recording-parameters or encoders，called only before setOutputFormat            mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);             //mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);                        // 〇state: Initialized=>DataSourceConfigured            // 设置錄製視頻输出格式            //     THREE_GPP:    3gp格式，H263视频ARM音频编码            //    MPEG-4:        MPEG4 media file format            //    RAW_AMR:    只支持音频且音频编码要求为AMR_NB            //    AMR_NB:                    //    ARM_MB:                    //    Default:                // 3gp or mp4            //Android支持的音频编解码仅为AMR_NB；支持的视频编解码仅为H263，H264只支持解码；支持对JPEG编解码；输出格式仅支持.3gp和.mp4            String lVideoFileFullPath;                lVideoFileFullPath = ".3gp"; //.mp4            mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);                //mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);            Log.i(TAG, "Video：Current container format: "+"3GP\n");                        // 设置視頻/音频文件的编码：AAC/AMR_NB/AMR_MB/Default            //    video: H.263, MP4-SP, or H.264                mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);            //mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);            //mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);            Log.i(TAG, "Video：Current encoding format: "+"H264\n");                                    // audio: AMR-NB            //mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);                        // 设置视频录制的分辨率。必须放在设置编码和格式的后面，否则报错            //mMediaRecorder.setVideoSize(176, 144);            mMediaRecorder.setVideoSize(320, 240);            //mMediaRecorder.setVideoSize(720, 480);                Log.i(TAG, "Video：Current Video Size: "+"320*240\n");                                    // 设置录制的视频帧率。必须放在设置编码和格式的后面，否则报错            mMediaRecorder.setVideoFrameRate(FRAME_RATE);                            // 预览            mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());                            // 设置输出文件方式： 直接本地存储   or LocalSocket远程输出            if(bIfNativeORRemote)    //Native            {                lVideoFileFullPath = strRecVideoFilePath + String.valueOf(System.currentTimeMillis()) + lVideoFileFullPath;                mRecVideoFile = new File(lVideoFileFullPath);                // mMediaRecorder.setOutputFile(mRecVideoFile.getAbsolutePath());                mMediaRecorder.setOutputFile(mRecVideoFile.getPath());    //called after set**Source before prepare                Log.i(TAG, "start write into file~");            }            else    //Remote            {                mMediaRecorder.setOutputFile(sender.getFileDescriptor()); //设置以流方式输出                 Log.i(TAG, "start send into sender~");            }                        //             mMediaRecorder.setMaxDuration(0);//called after setOutputFile before prepare,if zero or negation,disables the limit            mMediaRecorder.setMaxFileSize(0);//called after setOutputFile before prepare,if zero or negation,disables the limit            try            {                     mMediaRecorder.setOnInfoListener(this);                mMediaRecorder.setOnErrorListener(this);                // 〇state: DataSourceConfigured => prepared                mMediaRecorder.prepare();                // 〇state: prepared => recording                mMediaRecorder.start();                bIfRecInProcess = true;                Log.i(TAG, "initializeVideo Start!");            } catch (Exception e)            {                        releaseMediaRecorder();                finish();                e.printStackTrace();            }            return true;        } catch (Exception e)        {            // TODO: handle exception            e.printStackTrace();            return false;        }    }