android 录像本地网络传输保存成mp4文件
Posted 红尘六欲
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了android 录像本地网络传输保存成mp4文件相关的知识，希望对你有一定的参考价值。
android 录像本地网络传输保存成mp4文件
说明
通过MediaRecorder加LocalSocket实现本地网络传输，再通过其它硬件接口(非网络接口)将mp4数据传送到PC端稍微处理一下
保存成播放器能正常播放的mp4文件，如果设备与服务器有网络连接可以直接跳过本记录使用android-libstreaming
通过libstreaming的例子1设置目标地址为本机127.0.0.1测试了一两次好像不行，放弃了。
本记录只适合录像时间比较固定，同时录像时间不能太长的应用
系统源码修改
源码路径frameworks/av/media/libstagefright/MPEG4Writer.cpp
1.函数MPEG4Writer::MPEG4Writer(int fd)
// Verify mFd is seekable
off64_t off = lseek64(mFd, 0, SEEK_SET);
if (off < 0)
ALOGE("cannot seek mFd: %s (%d)", strerror(errno), errno);
//release();
注释掉其中的release,android5以下没有这个判断可以不用管
2.函数int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate)
static const int64_t MAX_MOOV_BOX_SIZE = (3000000 * 6LL / 8000) * 1800;//(180 * 3000000 * 6LL / 8000); modify 3minutes to 30 minutes
修改MAX_MOOV_BOX_SIZE最大为30分钟计算的大小
如果只改第1个地方，针对录像时间小于15秒左右最后保存的文件经过处理能正常播放，但大于15秒后，时间越长moovbox内容越多，最后回写的次数无法确定，不好处理。
应用软件
有些变量，可自行定义
public final static String SOCKET_ADDR = "com.gzease.camera";
1.mediarecorder设置,部分代码
mMediaRecorder.setCamera(mCamera);
CamcorderProfile mProfile = CamcorderProfile.get(CamcorderProfile.QUALITY_480P);
mMediaRecorder.setAudiosource(MediaRecorder.AudioSource.MIC);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mMediaRecorder.setOutputFormat(mProfile.fileFormat);
mMediaRecorder.setVideoEncodingBitRate(mProfile.videoBitRate);
mMediaRecorder.setVideoEncoder(mProfile.videoCodec);
mMediaRecorder.setVideoSize(mProfile.videoFrameWidth, mProfile.videoFrameHeight);
mMediaRecorder.setVideoFrameRate(mProfile.videoFrameRate);
mMediaRecorder.setAudioEncodingBitRate(mProfile.audioBitRate);
mMediaRecorder.setAudioChannels(mProfile.audioChannels);
mMediaRecorder.setAudioSamplingRate(mProfile.audioSampleRate);
mMediaRecorder.setAudioEncoder(mProfile.audioCodec);
mMediaRecorder.setMaxDuration(0);
mMediaRecorder.setMaxFileSize(300*1024*1024);
mMediaRecorder.setOrientationHint(90);
mMediaRecorder.setPreviewDisplay(mSurfaceHolder != null ? mSurfaceHolder.getSurface() : null);
if(DataBase.hasCamEnCodeStream)
DataBase.CamFileSize = 0;
if(usbLocalSocket)
mMediaRecorder.setOutputFile(localServer.getLocalSocket().getFileDescriptor());
else
mMediaRecorder.setOutputFile(mParcelWrite.getFileDescriptor());
else
File file = new File(DataBase.PATH_VIDEOFILE);
if (file.exists())
file.delete();
try
fos = new FileOutputStream(DataBase.PATH_VIDEOFILE);
//mMediaRecorder.setOutputFile(DataBase.PATH_VIDEOFILE);
mMediaRecorder.setOutputFile(fos.getFD());
catch (FileNotFoundException e)
e.printStackTrace();
catch (IOException e)
e.printStackTrace();
new LogTools(TAG, "startVideoRecording setOutputFile : " + DataBase.PATH_VIDEOFILE);
try
mMediaRecorder.prepare();
mMediaRecorder.start();
catch (IOException e)
e.printStackTrace();
new LogTools().e(TAG, "startVideoRecording exception : " + e.getMessage());
releaseVideoRecorder();
一定要调用setMaxFileSize设置文件最大大小，不然系统mpeg4write中moovBox是按最小值处理，会影响最终处理流程
2.localserver
package com.gzease.CameraTools;
import android.net.LocalServerSocket;
import android.net.LocalSocket;
import com.gzease.tools.DataBase;
import com.gzease.tools.LogTools;
import java.io.IOException;
import java.io.InputStream;
public class LocalServer extends Thread
private final String TAG = "LocalServer";
private final int debug = DataBase.D_LEVEL_OUT;
private LocalServerSocket server;
private boolean isRun = true;
private boolean isConnect = false;
private LocalSocket localSocket;
@Override
public void run()
super.run();
try
server = new LocalServerSocket(DataBase.SOCKET_ADDR);
new LogTools(TAG," accept start",debug);
localSocket = server.accept();
new LogTools(TAG," accept end",debug);
isConnect = true;
catch (IOException e)
e.printStackTrace();
public LocalSocket getLocalSocket()
new LogTools(TAG," getLocalSocket isConnect:" + isConnect,debug);
if(isConnect)
return localSocket;
else
return null;
@Override
public void interrupt()
super.interrupt();
isRun = false;
3.localclient
package com.gzease.CameraTools;
import android.net.LocalSocket;
import android.net.LocalSocketAddress;
import com.gzease.tools.DataBase;
import com.gzease.tools.LogTools;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
public class LocalClient extends Thread
private static final String TAG = "LocalClient";
private static final int debug = DataBase.D_LEVEL_OUT;
private InputStream mInStream=null;
private LocalSocket localSocket;
private ReadThread readThread;
private boolean hasWriteFile = false;
private static String fileName = "/sdcard/test.mp4";
private static String destFileName = "/sdcard/test1.mp4";
@Override
public void run()
super.run();
try
Thread.sleep(1000);
localSocket = new LocalSocket();
new LogTools(TAG, "connect start",debug);
localSocket.connect(new LocalSocketAddress(DataBase.SOCKET_ADDR));
new LogTools(TAG, "connect end",debug);
mInStream = localSocket.getInputStream();
if(mInStream != null)
readThread = new ReadThread();
readThread.start();
catch (IOException e)
e.printStackTrace();
catch (InterruptedException e)
e.printStackTrace();
public LocalSocket getLocalSocket()
if(mInStream != null)
return localSocket;
else
return null;
@Override
public void interrupt()
super.interrupt();
if(readThread != null)
readThread.interrupt();
class ReadThread extends Thread
private boolean isRun = true;
@Override
public void run()
super.run();
try
while (isRun)
//byte[] buffer = new byte[1024 * 1024];
byte[] buffer = new byte[5 * 1024];
int size = mInStream.read(buffer);
if(size > 0)
if(hasWriteFile)
if(DataBase.CamFileSize == 0)
File file = new File(fileName);
if(file.exists())
file.delete();
toFile(buffer,size);
else
sendtoPc(buffer,size);
DataBase.CamFileSize += size;
new LogTools(TAG," DataBase.CamFileSize:" + DataBase.CamFileSize,debug);
else
this.interrupt();
catch (IOException e)
e.printStackTrace();
@Override
public void interrupt()
super.interrupt();
isRun = false;
private void sendtoPc(byte[] buf,int size)
private void toFile(byte[] buf,int size)
try
// 打开一个随机访问文件流，按读写方式
RandomAccessFile randomFile = new RandomAccessFile(fileName, "rw");
// 文件长度，字节数
long fileLength = randomFile.length();
// 将写文件指针移到文件尾。
randomFile.seek(fileLength);
randomFile.write(buf,0,size);
randomFile.close();
catch (IOException e)
e.printStackTrace();
public static void DealFile()
RandomAccessFile srcfile = null;
RandomAccessFile destfile = null;
long starttime,endtime;
starttime = System.currentTimeMillis();
new LogTools(TAG,"start time :" + starttime,debug);
try
File file = new File(fileName);
File file1 = new File(destFileName);
if(file1.exists())
file1.delete();
srcfile = new RandomAccessFile(fileName, "r");
destfile = new RandomAccessFile(destFileName, "rw");
new LogTools(TAG,"filelen :" + file.length(),debug);
srcfile.seek(24);//rewrite head
destfile.writeInt(srcfile.readInt());
srcfile.seek(4);
byte[] dat = new byte[20];//writeFtypBox ftyp+mp42+0000+isom+mp42
srcfile.read(dat);
destfile.write(dat);
long moovStart = searchEndStr(fileName,"moov");
new LogTools(TAG,"moovStart:" + moovStart,debug);
srcfile.seek(moovStart - 4);
int moovSize = srcfile.readInt();
destfile.writeInt(moovSize);
dat = new byte[moovSize - 4];
srcfile.read(dat);
destfile.write(dat);
srcfile.seek(file.length() - 8);
int freeSize = srcfile.readInt();
new LogTools(TAG,"freeSize:" + Integer.toHexString(freeSize),debug);
destfile.writeInt(freeSize);//4
destfile.write("free".getBytes());//4
dat = new byte[freeSize - 4 - 4];
destfile.write(dat);
srcfile.seek(moovStart - 8);//media data size
int mediaDataSize = srcfile.readInt();
destfile.writeInt(mediaDataSize);//write media data size
srcfile.seek(40);
mediaDataSize -= 4;//start from mdat
while (true)
byte[] mdat = new byte[100*1024];
srcfile.read(mdat);
if(mediaDataSize > mdat.length)
mediaDataSize -= mdat.length;
destfile.write(mdat);
else
destfile.write(mdat,0,mediaDataSize);
mediaDataSize = 0;
new LogTools(TAG,"media size1:" + mediaDataSize,debug);
if(mediaDataSize <= 0)
break;
srcfile.android 录像本地网络传输保存成mp4文件