在Galaxy S3上录制时,视频显示会出现乱码

Question

我正在写一个相机应用程序,我遇到了S3的问题.每当我开始录制时,显示屏都会变成垃圾(见下面的截图).然后,当我停止录制时,我得到一个例外:

10-02 13:36:31.647: E/MediaRecorder(24283): stop failed: -1007
10-02 13:36:31.647: D/AndroidRuntime(24283): Shutting down VM
10-02 13:36:31.647: W/dalvikvm(24283): threadid=1: thread exiting with uncaught exception (group=0x40c49a68)
10-02 13:36:31.647: E/AndroidRuntime(24283): FATAL EXCEPTION: main
10-02 13:36:31.647: E/AndroidRuntime(24283): java.lang.RuntimeException: stop failed.
10-02 13:36:31.647: E/AndroidRuntime(24283):    at android.media.MediaRecorder.native_stop(Native Method)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at android.media.MediaRecorder.stop(MediaRecorder.java:742)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at com.myapp.android.ui.camera.NewCameraActivity.stopRecording(NewCameraActivity.java:178)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at com.myapp.android.ui.camera.NewCameraActivity.toggleRecording(NewCameraActivity.java:189)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at com.myapp.android.ui.camera.NewCameraActivity.onClick(NewCameraActivity.java:97)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at android.view.View.performClick(View.java:3565)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at android.view.View$PerformClick.run(View.java:14165)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at android.os.Handler.handleCallback(Handler.java:605)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at android.os.Handler.dispatchMessage(Handler.java:92)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at android.os.Looper.loop(Looper.java:137)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at android.app.ActivityThread.main(ActivityThread.java:4514)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at java.lang.reflect.Method.invokeNative(Native Method)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at java.lang.reflect.Method.invoke(Method.java:511)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
10-02 13:36:31.647: E/AndroidRuntime(24283):    at dalvik.system.NativeStart.main(Native Method)

我已经在Galaxy Nexus(4.1),Galaxy S2,Nexus S和Galaxy Tab 10.1上测试了我的应用程序.所有这些都很好.我遵循视频录制的开发指南.我不明白为什么这个设备与其他设备如此不同.这就是我在设备上看到的内容.第一张照片是在我开始录制之前.第二张照片是我开始录制后会发生的事情.

这是我准备和启动MediaRecorder对象的代码:

@Override
public void onClick( View v ) {

    switch (v.getId()) {
        case R.id.camera_action_ImageView:
            int mode = getMode();
            if ( mode == MODE_PHOTO ) {
                focusThenTakePicture();
            }
            else if ( mode == MODE_VIDEO ) {
                toggleRecording();
            }
            break;
    }
}

private void startRecording() {

    if ( prepareRecorder() ) {
        getRecorder().start();
        setRecording( true );
    }
}

@TargetApi( 9 )
private boolean prepareRecorder() {

    Camera camera = getCamera();
    camera.unlock();

    MediaRecorder recorder = new MediaRecorder();
    setRecorder( recorder );
    recorder.setCamera( camera );
    recorder.setAudioSource( MediaRecorder.AudioSource.CAMCORDER );
    recorder.setVideoSource( MediaRecorder.VideoSource.CAMERA );

    CamcorderProfile profile;
    if ( Build.VERSION.SDK_INT < Build.VERSION_CODES.GINGERBREAD ) {
        profile = CamcorderProfile.get( CamcorderProfile.QUALITY_HIGH );
    }
    else {
        profile = CamcorderProfile.get( getCameraId(), CamcorderProfile.QUALITY_HIGH );
    }
    recorder.setProfile( profile );

    File outputFile = LocalMediaUtil.getOutputMediaFile( LocalMediaUtil.MEDIA_TYPE_VIDEO );
    setRecorderOutputFile( outputFile );
    recorder.setOutputFile( outputFile.toString() );
    recorder.setPreviewDisplay( getPreview().getHolder().getSurface() );

    try {
        recorder.prepare();
    }
    catch (Exception e) {
        camera.lock();
        setRecorder( null );
        return false;
    }

    return true;
}

private void stopRecording() {

    MediaRecorder recorder = getRecorder();
    recorder.stop();
    releaseRecorder();
    setRecording( false );

    LocalMediaUtil.scanMedia( this, getRecorderOutputFile().toString(), 90 );
    setRecorderOutputFile( null );
}

private void toggleRecording() {

    if ( isRecording() ) {
        stopRecording();
    }
    else {
        startRecording();
    }
}

private void releaseRecorder() {

    MediaRecorder recorder = getRecorder();
    if ( recorder != null ) {

        recorder.reset();
        recorder.release();
        setRecorder( null );

        getCamera().lock();
    }
}

编辑:所以这与CamcorderProfile被设置有关.我改变它CamcorderProfile.QUALITY_LOW,它工作正常.那么如何在没有乱码输出的情况下获得高分辨率视频呢？

编辑2:所以使用CamcorderProfile.QUALITY_LOWset,我使用录像机没有错误.但是,输出视频与上面发布的乱码截图非常相似.什么给出了什么？

Answer 1

我有一个类似的问题,最后发现它是由于共享相机和媒体记录器之间的预览表面(我不确定这实际上是根本原因,但从API调用看起来就是这样).

我假设您已经打开相机并附加了预览显示,如果是这样,请尝试在prepareRecorder方法的顶部插入以下行:

Camera camera = getCamera();
camera.stopPreview();
camera.lock();
camera.release();

camera = Camera.open();
camera.unlock();

您可能还需要将相机本地重新分配给隐藏在getCamera()后面的字段,遗憾的是我无法告诉您如何使用给定的代码段实现它.

希望这可以帮助.