[Streaming media] Android real-time video collection-mediarecoder recording

ArticleDirectory

• ① Use mediarecoder
• ② Use localsocket
• ③ Mediarecorder Problems

[Streaming media] Android real-time video collection-mediarecoder recording

Skyseraph Mar 31st 2012

Email: zgzhaobo@gmail.com QQ: 452728574

0

This article is only a series of coherence. In fact, mediarecoder has been used in the previous series of blog posts. For details, see the previous Android series blog Android (19)

1 Overview

Use mediarecorder of Android to bind localsocket to the setoutputfile function.

2 knowledge points ① use mediarecoder

Reference [Questions about Android] multi-media: mediarecorder enables a recorder

② Use localsocket

Send and receive data simultaneously on a mobile phone.

Http://api.apkbus.com/reference/android/net/LocalSocket.html

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

3 core source code ① surfaceview

Reference[Streaming media] Android real-time video collection-camera preview collectionMulti-media: mediarecorder implements a recorder

② Init localsocket

Private VoidInitlocalsocket ()
{
Extends ER =NewLocalsocket ();
Try
{
LSS =NewLocalserversocket ("h264 ");
Receiver. Connect (NewLocalsocketaddress ("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 Problems

Reference:[Questions about Android] multi-media: video recorder implemented by mediarecoder  Multi-media: mediarecorder implements a recorder

The initiativevideo core module is attached.

 Private   Boolean Initializevideo ()
{
 Try 
{
Log. I (TAG, "# initializevideo ....");
 //  〇 state: initial instantiate the mediarecorder object  
              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 => performanceconfigured
  // Set the output format
  //  Three_gpp: 3GP format, h263 video arm Audio Encoding
  //  MPEG-4: MPEG4 media file format
  //  Raw_amr: only supports audio and the Audio Encoding must be amr_nb.
  //  Amr_nb:
  //  Arm_mb:
  //  Default:
  // 3GP or MP4
  //  Bytes  
 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 ");

 //  Set audio/audio file encoding: 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 );

  //  Sets the video recording resolution. It must be placed behind the encoding and format. Otherwise, an error is returned.
  //  Mmediarecorder. setvideosize (176,144 );  
 Mmediarecorder. setvideosize (320,240 );
 //  Mmediarecorder. setvideosize (720,480 ); 
 Log. I (TAG, "Video: current video size:" + "320*240 \ n ");

 //  Set the Frame Rate of the recorded video. It must be placed behind the encoding and format. Otherwise, an error is returned.  
 Mmediarecorder. setvideoframerate (frame_rate );

 //  Preview  
 Mmediarecorder. setpreviewdisplay (msurfaceholder. getsurface ());

 //  Set the output file mode: local storage or localsocket remote output  
             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 ()); //  Set output in streaming mode  
 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: performanceconfigured => 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

See the link in the article.