【流媒體】Android 实时视频采集—MediaRecoder录制

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

作者:skyseraph

【流媒體】Android 实时视频采集—MediaRecoder录制

SkySeraph Mar 31st 2012

Email：zgzhaobo@gmail.com    QQ：452728574

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;
}
}

 

Refs/Related

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