我在使用Android上的MediaRecorder将视频保存到SD卡时遇到问题。
我的代码工作到我到达将配置文件设置为高质量的行。
这是我的代码：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.activity_sample_testing);
// Show the Up button in the action bar.
//setupActionBar();
overridePendingTransition(0, 0);
SurfaceView cameraView = (SurfaceView)findViewById(R.id.videoView1);
holder = cameraView.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
intentTestResults = new Intent(this, TestResultsAct.class);
TestPB = (ProgressBar) findViewById(R.id.ProgressBarTest);
new Thread(new Runnable() {
@Override
public void run() {
while(mProgressStatus < 100){
if(mProgressStatus == 1)
record();
if(mProgressStatus == 35)
record();
mProgressStatus += 1;
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mHandler.post(new Runnable() {
@Override
public void run() {
TestPB.setProgress(mProgressStatus);
}
});
}
}
}).start();
//
}
而
private void initRecorder() {
camera.unlock();
recorder.setCamera(camera);
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
CamcorderProfile cpHigh = CamcorderProfile
.get(CamcorderProfile.QUALITY_HIGH);
recorder.setProfile(cpHigh);
recorder.setOutputFile(Environment.getExternalStorageDirectory() + "/DCIM/Frames/videocapture_example.mp4");
recorder.setMaxDuration(50000); // 50 seconds
recorder.setMaxFileSize(300000000); // Approximately 5 megabytes
}
private void prepareRecorder() {
recorder.setPreviewDisplay(holder.getSurface());
try {
recorder.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
finish();
} catch (IOException e) {
e.printStackTrace();
finish();
}
}
void record()
{
if (recording) {
recorder.stop();
recording = false;
camera.lock();
parameters.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(parameters);
camera.unlock();
recorder.release();
//finish();
} else {
recording = true;
initRecorder();
prepareRecorder();
recorder.start();
}
}
我的问题出现在这行之后：recorder.setProfile（cpHigh）;
这是logcat：
12-26 10:37:43.670: E/MediaRecorder(6046): try to set the audio encoder without setting the audio source first
12-26 10:38:35.150: W/dalvikvm(6046): threadid=11: thread exiting with uncaught exception (group=0x40fee2a0)
12-26 10:38:37.065: E/AndroidRuntime(6046): FATAL EXCEPTION: Thread-794
12-26 10:38:37.065: E/AndroidRuntime(6046): java.lang.IllegalStateException
12-26 10:38:37.065: E/AndroidRuntime(6046): at android.media.MediaRecorder.setAudioEncoder(Native Method)
12-26 10:38:37.065: E/AndroidRuntime(6046): at android.media.MediaRecorder.setProfile(MediaRecorder.java:370)
12-26 10:38:37.065: E/AndroidRuntime(6046): at com.example.homedevice.SampleTestingAct.initRecorder(SampleTestingAct.java:124)
12-26 10:38:37.065: E/AndroidRuntime(6046): at com.example.homedevice.SampleTestingAct.record(SampleTestingAct.java:155)
12-26 10:38:37.065: E/AndroidRuntime(6046): at com.example.homedevice.SampleTestingAct$2.run(SampleTestingAct.java:90)
12-26 10:38:37.065: E/AndroidRuntime(6046): at java.lang.Thread.run(Thread.java:856)
12-26 10:38:47.555: E/MediaRecorder(6046): stop called in an invalid state: 4
编写的例外是： java.lang.IllegalStateException
我做错了什么？
EDIT1（声音许可）：
private void initRecorder() {
camera.unlock();
recorder.setCamera(camera);
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
//recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
//recorder.setVideoSize(1920, 1080);
//recorder.setVideoFrameRate(30);
CamcorderProfile cpHigh = CamcorderProfile
.get(CamcorderProfile.QUALITY_HIGH);
recorder.setProfile(cpHigh);
recorder.setOutputFile(Environment.getExternalStorageDirectory() + "/DCIM/Frames/videocapture_example.mp4");
recorder.setMaxDuration(50000); // 50 seconds
recorder.setMaxFileSize(300000000); // Approximately 5 megabytes
}
Edit2（logcat）： 这是logcat
12-26 11:32:43.170: E/AndroidRuntime(18552): FATAL EXCEPTION: Thread-1016
12-26 11:32:43.170: E/AndroidRuntime(18552): java.lang.IllegalStateException
12-26 11:32:43.170: E/AndroidRuntime(18552): at android.media.MediaRecorder.setOutputFormat(Native Method)
12-26 11:32:43.170: E/AndroidRuntime(18552): at android.media.MediaRecorder.setProfile(MediaRecorder.java:357)
12-26 11:32:43.170: E/AndroidRuntime(18552): at com.example.homedevice.SampleTestingAct.initRecorder(SampleTestingAct.java:127)
12-26 11:32:43.170: E/AndroidRuntime(18552): at com.example.homedevice.SampleTestingAct.record(SampleTestingAct.java:158)
12-26 11:32:43.170: E/AndroidRuntime(18552): at com.example.homedevice.SampleTestingAct$2.run(SampleTestingAct.java:90)
12-26 11:32:43.170: E/AndroidRuntime(18552): at java.lang.Thread.run(Thread.java:856)
setOutputFormat called in an invalid state: 4
threadid=11: thread exiting with uncaught exception (group=0x40fee2a0).
答案 0 :(得分：1)
setProfile（）函数。
如果你没有设置音频源，它总是调用setAudioEncoder（） 它会崩溃。
尝试将其包含在您的代码中：
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
说明：
CamcorderProfile还设置音频属性（例如Codec，BitRate，SampleRate，...），因此您需要在调用之前设置音频源，这就是应用程序崩溃的原因。如果您不想录制音频，请尝试下一个代码：
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
recorder.setVideoSize(WIDTH, HEIGHT);
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
recorder.setOutputFile(PATH);
recorder.setPreviewDisplay(SURFACE);
recorder.prepare();
recorder.start();
答案 1 :(得分：0)
Yeap，recorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH))已经为您设置了AudioEncoder和VideoEncoder。
删除那些编码器，之后你应该没问题。