在尝试从前置摄像头录制视频时,我正在获得以下异常。然而,后置摄像头记录工作良好。联机崩溃mMediaRecorder.start();
java.lang.RuntimeException: start failed.
at android.media.MediaRecorder.start(MediaRecorder.java)
at xyz.CameraFragment$6.onClick(CameraFragment.java:270)
at android.view.View.performClick(View.java:4466)
at android.view.View$PerformClick.run(View.java:18537)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5102)
at java.lang.reflect.Method.invokeNative(Method.java)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(NativeStart.java)
下面是我的代码-
private boolean prepareVideoRecorder() {
mMediaRecorder = new MediaRecorder();
mCamera.unlock();
mMediaRecorder.setCamera(mCamera);
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
mVideoFile = new File(getOutputMediaFile().toString());
mMediaRecorder.setOutputFile(mVideoFile.getAbsolutePath());
mMediaRecorder.setPreviewDisplay(mPreview.getHolder().getSurface());
mMediaRecorder.setOrientationHint(270);
mMediaRecorder.setMaxDuration(10000);
mMediaRecorder.setOnInfoListener(this);
try {
mMediaRecorder.prepare();
} catch (IllegalStateException e) {
Log.d("CAMERA", "IllegalStateException preparing MediaRecorder: " + e.getMessage());
releaseMediaRecorder();
return false;
} catch (IOException e) {
Log.d("CAMERA", "IOException preparing MediaRecorder: " + e.getMessage());
releaseMediaRecorder();
return false;
}
return true;
}
if (prepareVideoRecorder()) {
// Camera is available and unlocked, MediaRecorder is prepared,
// now you can start recording
mMediaRecorder.start();
}
根据spitzanator的回答:
- 确保你的权限是正确的:
<uses-feature android:name="android.hardware.camera.front" />
- 显然这行代码不工作与前置摄像头:
mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
spitzanator还说: CamcorderProfile.get()的签名默认为后置摄像头的配置文件:
返回给定质量水平下设备上第一个后置摄像头的摄像机配置文件。如果设备没有后置摄像头,则返回null。
理想的解决方案可以在这里找到。
旁注:由于声誉较低,我无法发表评论而不是发布答案,所以所有的功劳都归spitzanator。