MediaRecorder启动失败：将CamcorderProfile.QUALITY_LOW更改为CamcorderProfile.QUALITY_HIGH时为-16。我尝试了很多解决方案，但得到了同样的错误。
以下是我的代码：
private boolean prepareVideoRecorder() {
if(mMediaRecorder == null){
mMediaRecorder = new MediaRecorder();
}else{
Log.d(Constants.TAG,"MediaRecoder is Not Null");
}
// Step 1: Unlock and set camera to MediaRecorder
mCamera.stopPreview();
mCamera.unlock();
mMediaRecorder.setCamera(mCamera);
// Step 2: Set sources
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
// Size optimalSize = new Size(320,240);
// int width=320, height=240;
// Parameters params = mCamera.getParameters();
// List<Size> sizes = params.getSupportedPreviewSizes();
// optimalSize = getOptimalPreviewSize(sizes, width, height);
// params.setPreviewSize(optimalSize.width, optimalSize.height);
// mMediaRecorder.setVideoSize(optimalSize.width, optimalSize.height);
CamcorderProfile profile = CamcorderProfile.get(mCamSelect, CamcorderProfile.QUALITY_HIGH);
if(profile == null){
Log.d(Constants.TAG, "the camcorder profile instance is null");
}
// Step 3: Set a CamcorderProfile (requires API Level 8 or higher)
mMediaRecorder.setProfile(profile);
// Step 4: Set output file
mMediaRecorder.setOutputFile(getOutputMediaFile(MEDIA_TYPE_VIDEO).toString());
// Step 5: Set the preview output
mMediaRecorder.setPreviewDisplay(mPreview.getHolder().getSurface());
// Step 6: Prepare configured MediaRecorder
try {
mMediaRecorder.prepare();
} catch (IllegalStateException e) {
Log.d("DEBUG", "IllegalStateException preparing MediaRecorder: " + e.getMessage());
releaseMediaRecorder();
return false;
} catch (IOException e) {
Log.d("DEBUG", "IOException preparing MediaRecorder: " + e.getMessage());
releaseMediaRecorder();
return false;
}
return true;
}
logcat的：
04-12 11:09:14.396: V/MediaRecorderJNI(19761): start
04-12 11:09:14.396: V/MediaRecorderJNI(19761): getMediaRecorder E
04-12 11:09:14.466: E/MediaRecorder(19761): start failed: -16
04-12 11:09:14.466: V/MediaRecorderJNI(19761): process_media_recorder_call
04-12 11:09:14.466: D/AndroidRuntime(19761): Shutting down VM
04-12 11:09:14.466: W/dalvikvm(19761): threadid=1: thread exiting with uncaught exception (group=0x4001d5a0)
04-12 11:09:14.466: E/AndroidRuntime(19761): FATAL EXCEPTION: main
04-12 11:09:14.466: E/AndroidRuntime(19761): java.lang.RuntimeException: start failed.
04-12 11:09:14.466: E/AndroidRuntime(19761): at android.media.MediaRecorder.start(Native Method)
04-12 11:09:14.466: E/AndroidRuntime(19761): at uk.org.humanfocus.hfi.RecordVideoActivity.captureButtonHandler(RecordVideoActivity.java:218)
04-12 11:09:14.466: E/AndroidRuntime(19761): at uk.org.humanfocus.hfi.RecordVideoActivity.onClick(RecordVideoActivity.java:100)
04-12 11:09:14.466: E/AndroidRuntime(19761): at android.view.View.performClick(View.java:2533)
04-12 11:09:14.466: E/AndroidRuntime(19761): at android.view.View$PerformClick.run(View.java:9320)
04-12 11:09:14.466: E/AndroidRuntime(19761): at android.os.Handler.handleCallback(Handler.java:587)
04-12 11:09:14.466: E/AndroidRuntime(19761): at android.os.Handler.dispatchMessage(Handler.java:92)
04-12 11:09:14.466: E/AndroidRuntime(19761): at android.os.Looper.loop(Looper.java:150)
04-12 11:09:14.466: E/AndroidRuntime(19761): at android.app.ActivityThread.main(ActivityThread.java:4385)
04-12 11:09:14.466: E/AndroidRuntime(19761): at java.lang.reflect.Method.invokeNative(Native Method)
04-12 11:09:14.466: E/AndroidRuntime(19761): at java.lang.reflect.Method.invoke(Method.java:507)
04-12 11:09:14.466: E/AndroidRuntime(19761): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
04-12 11:09:14.466: E/AndroidRuntime(19761): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
04-12 11:09:14.466: E/AndroidRuntime(19761): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：2)
我解决了这个问题。
以下是我的工作代码。
private boolean prepareVideoRecorder() {
if(mMediaRecorder == null){
mMediaRecorder = new MediaRecorder();
}else{
Log.d(Constants.TAG,"MediaRecoder is Not Null");
}
// Step 1: Unlock and set camera to MediaRecorder
mCamera.stopPreview();
mCamera.unlock();
mMediaRecorder.setCamera(mCamera);
// Step 2: Set sources
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
// Step 3: Set output format and encoding (for versions prior to API Level 8)
CamcorderProfile camcorderProfile = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
camcorderProfile.videoFrameWidth = 640;
camcorderProfile.videoFrameHeight = 480;
// camcorderProfile.videoFrameRate = 15;
camcorderProfile.videoCodec = MediaRecorder.VideoEncoder.H264;
// camcorderProfile.audioCodec = MediaRecorder.AudioEncoder.AAC;
camcorderProfile.fileFormat = MediaRecorder.OutputFormat.MPEG_4;
mMediaRecorder.setProfile(camcorderProfile);
// Step 4: Set output file
mMediaRecorder.setOutputFile(getOutputMediaFile(MEDIA_TYPE_VIDEO).toString());
// Step 5: Set the preview output
mMediaRecorder.setPreviewDisplay(mPreview.getHolder().getSurface());
// Step 6: Prepare configured MediaRecorder
try {
mMediaRecorder.prepare();
} catch (IllegalStateException e) {
Log.d("DEBUG", "IllegalStateException preparing MediaRecorder: " + e.getMessage());
releaseMediaRecorder();
return false;
} catch (IOException e) {
Log.d("DEBUG", "IOException preparing MediaRecorder: " + e.getMessage());
releaseMediaRecorder();
return false;
}
return true;
}