Question

目前我正在使用Custom Camera for Recording video。

我已正确completed Take Picture from Camera feature。

我也在尝试making Recording Video from Camera feature work。

实际上，如果我没有尝试为视频设置Encoder，那就可以了。

但我想自定义录制视频功能，因此我已为Encoder设置Media Recorder并始终获得IllegalStateException。

所以我想要的是：Can set encoder, both audio encoder and video encoder for video完全没有发生异常。

知道如何的人，

请告诉我，

真的，谢谢你，

以下是代码。

private boolean prepareVideoRecorder(int mode){
        // Should release before use new Preview for Recording Video mode
        CustomCamera.releaseCamera();

        // Initialize camera
        CustomCamera.mCamera = CustomCamera.getCameraInstance(mode);

        // Set orientation display
        CustomCamera.setCameraDisplayOrientation(getActivity(), mode);

        // Should release before use new Preview for Recording Video mode
        CustomCamera.releaseMediaRecorder();

        CustomCamera.mMediaRecorder = new MediaRecorder();

        // Step 1: Unlock and set camera to MediaRecorder
        CustomCamera.mCamera.unlock();
        CustomCamera.mMediaRecorder.setCamera(CustomCamera.mCamera);

        // Step 2: Set sources
        CustomCamera.mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
        CustomCamera.mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

        // THESE LINES GET CRASH
        CustomCamera.mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        CustomCamera.mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);

        // todo Step 3: Set a CamcorderProfile (requires API Level 8 or higher)
        CustomCamera.mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));

        // Step 4: Set output file
        CustomCamera.mMediaRecorder.setOutputFile(getOutputMediaFile(MediaType.VIDEO).toString());

        // Step 5: Set the preview output
        CustomCamera.mMediaRecorder.setPreviewDisplay(mCameraPreview.getHolder().getSurface());


        // Step 6: Prepare configured MediaRecorder
        try {
            CustomCamera.mMediaRecorder.prepare();

            CustomCamera.mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        } catch (IllegalStateException e) {
            e.printStackTrace();
            CustomCamera.releaseMediaRecorder();
            return false;
        } catch (IOException e) {
            e.printStackTrace();
            CustomCamera.releaseMediaRecorder();
            return false;
        }
        return true;
    }

p / s：

虽然我设置了这些行

CustomCamera.mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        CustomCamera.mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);

方法setProfile之前或之后（或setOutputFile）仍然会遇到此异常。

以下是thrown exception：

    > I/MediaRecorderJNI﹕ prepare: surface=0x1cf9610 (identity=373)
    E/MediaRecorder﹕ audio encoder has already been set
 java.lang.IllegalStateException
    at android.media.MediaRecorder.setAudioEncoder(Native Method)
    at ui.fragment.custom.camera.CameraPreviewFragment.prepareVideoRecorder(CameraPreviewFragment.java:469)
    at ui.fragment.custom.camera.CameraPreviewFragment.onClick(CameraPreviewFragment.java:203)
    at android.view.View.performClick(View.java:3574)
    at android.view.View$PerformClick.run(View.java:14293)
    at android.os.Handler.handleCallback(Handler.java:605)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4448)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
     at dalvik.system.NativeStart.main(Native Method)

解

在setProfile()方法

之后设置以下代码

 CustomCamera.mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
    CustomCamera.mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);

并移除.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);例外中的行try-catch。它工作正常。

Answer 1

从try catch中删除CustomCamera.mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);行，因为您尝试再次设置AudioEncoder，因此异常。

修改在Encoder方法之后设置setProfile()，这是正确的。

尝试为Media Recorder设置Encoder时发生IllegalStateException

1 个答案: