The phone's camera developed by android USES MediaRecorder to record and play video
- 2020-05-09 19:15:48
- OfStack
Let's play with the recording function of the phone. Do a DEMO.
Check out the recording process:
Post my own encapsulation class:
So at the same time we're going to play it:
Sample code is available for download
------------
Thanks to those who Shared their technical experience.
Check out the recording process:
mediarecorder = new MediaRecorder();// create mediarecorder object
// Set the recorded video source as Camera( The camera )
mediarecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
// Set the packaging format of the video after recording THREE_GPP for 3gp.MPEG_4 for mp4
mediarecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
// Sets the video encoding for recording h263 h264
mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
// Set the resolution of the video recording. Must be placed after the setting code and format, otherwise error is reported
mediarecorder.setVideoSize(176, 144);
// Sets the frame rate of the recorded video. Must be placed after the setting code and format, otherwise error is reported
mediarecorder.setVideoFrameRate(20);
mediarecorder.setPreviewDisplay(surfaceView.getHolder().getSurface());
// Sets the path to the video file output
lastFileName = newFileName();
mediarecorder.setOutputFile(lastFileName);
try {
// To prepare the recording
mediarecorder.prepare();
// Start recording
mediarecorder.start();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
End of shooting:
if (mediarecorder != null) {
// stop
mediarecorder.stop();
mediarecorder.release();
mediarecorder = null;
}
Post my own encapsulation class:
package zyf.demo.moviedemo;
import java.io.File;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;
import android.media.MediaRecorder;
import android.view.SurfaceView;
public class MovieRecorder {
private MediaRecorder mediarecorder;
boolean isRecording;
public void startRecording(SurfaceView surfaceView) {
mediarecorder = new MediaRecorder();// create mediarecorder object
// Set the recorded video source as Camera( The camera )
mediarecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
// Set the packaging format of the video after recording THREE_GPP for 3gp.MPEG_4 for mp4
mediarecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
// Sets the video encoding for recording h263 h264
mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
// Set the resolution of the video recording. Must be placed after the setting code and format, otherwise error is reported
mediarecorder.setVideoSize(176, 144);
// Sets the frame rate of the recorded video. Must be placed after the setting code and format, otherwise error is reported
mediarecorder.setVideoFrameRate(20);
mediarecorder.setPreviewDisplay(surfaceView.getHolder().getSurface());
// Sets the path to the video file output
lastFileName = newFileName();
mediarecorder.setOutputFile(lastFileName);
try {
// To prepare the recording
mediarecorder.prepare();
// Start recording
mediarecorder.start();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
isRecording = true;
timeSize = 0;
timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
// TODO Auto-generated method stub
timeSize++;
}
}, 0,1000);
}
Timer timer;
int timeSize = 0;
private String lastFileName;
public void stopRecording() {
if (mediarecorder != null) {
// stop
mediarecorder.stop();
mediarecorder.release();
mediarecorder = null;
timer.cancel();
if (null != lastFileName && !"".equals(lastFileName)) {
File f = new File(lastFileName);
String name = f.getName().substring(0,
f.getName().lastIndexOf(".3gp"));
name += "_" + timeSize + "s.3gp";
String newPath = f.getParentFile().getAbsolutePath() + "/"
+ name;
if (f.renameTo(new File(newPath))) {
int i = 0;
i++;
}
}
}
}
public String newFileName() {
try {
return File.createTempFile("/mov_", ".3gp").getAbsolutePath();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
}
public void release() {
if (mediarecorder != null) {
// stop
mediarecorder.stop();
mediarecorder.release();
mediarecorder = null;
}
} }
So at the same time we're going to play it:
public void play(String fileName, SurfaceView view) {
mPlayer = new MediaPlayer();
mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mPlayer.setDisplay(view.getHolder()); // define 1 a SurfaceView Play it
mPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer arg0) {
stop();
// canvas.drawColor(Color.TRANSPARENT,
// PorterDuff.Mode.CLEAR);
}
});
try {
mPlayer.setDataSource(fileName);
mPlayer.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mPlayer.start();
}
At the end of play:
public void stop() {
if (mPlayer != null) {
mPlayer.release();
mPlayer = null;
}
}
Sample code is available for download
------------
Thanks to those who Shared their technical experience.