6

我是这些领域的新人。我正在尝试更改 github 中的程序以播放纸板视频。

我使用 StreamingTexture 修改了 MyRenderer。

public class MyRenderer extends RajawaliCardboardRenderer {

public MyRenderer(Context context) {
    super(context);
}

private MediaPlayer mMediaPlayer;
private StreamingTexture streamingTexture;

@Override
protected void initScene() {
    mMediaPlayer = MediaPlayer.create(this.getContext(), R.raw.test);

    streamingTexture = new StreamingTexture("video", mMediaPlayer);
    Sphere sphere = createPhotoSphereWithTexture(streamingTexture);

    getCurrentScene().addChild(sphere);

    getCurrentCamera().setPosition(Vector3.ZERO);
    getCurrentCamera().setFieldOfView(75);
}

private static Sphere createPhotoSphereWithTexture(ATexture texture) {

    Material material = new Material();
    material.setColor(0);

    try {
        material.addTexture(texture);
    } catch (ATexture.TextureException e) {
        throw new RuntimeException(e);
    }

    Sphere sphere = new Sphere(50, 64, 32);
    sphere.setScaleX(-1);
    sphere.setMaterial(material);

    return sphere;
}
}

我将我的短视频作为 test.mp4 保存在 raw 文件夹中，但是，在我启动我的应用程序后，两侧是空白的，并且视频的声音实际上正在播放。

我需要一些帮助。非常感谢！

4

1 回答 1

5

我在这样的纸板中获得了带有头部跟踪的 360 度视频。

使用RajawaliVRRenderer扩展您的课程 

public class YoureVideoClass extends RajawaliVRRenderer {

接下来使用以下 initScene()：

    @Override
public void initScene() {

    // setup sphere
    Sphere sphere = new Sphere(1, 100, 100);
    sphere.setPosition(0, 0, 0);
    // invert the sphere normals
    // factor "1" is two small and result in rendering glitches
    sphere.setScaleX(100);
    sphere.setScaleY(100);
    sphere.setScaleZ(-100);

    //initiate MediaPlayer
    mediaPlayer = new MediaPlayer();
    mediaPlayer.setLooping(true);
    try {
        Uri videoUrl = Uri.parse("android.resource://" + getContext().getPackageName() + "/"
                + R.raw.test);
        mediaPlayer.setDataSource(getContext(),Uri.parse(videoUrl));
        mediaPlayer.prepareAsync();    //prepare the player (asynchronous)
        mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp.start(); //start the player only when it is prepared
            }
        });
    } catch (IOException e) {
        e.printStackTrace();
    }

    // create texture from media player video
    videoTexture = new StreamingTexture("video", mediaPlayer);

    // set material with video texture
    Material material = new Material();
    material.setColorInfluence(0f);
    try {
        material.addTexture(videoTexture);
    } catch (ATexture.TextureException e){
        throw new RuntimeException(e);
    }
    sphere.setMaterial(material);

    // add sphere to scene
    getCurrentScene().addChild(sphere);

    super.initScene();
}

启动场景后，您希望在每次渲染时更新 videoTexture，因此添加：

@Override
public void onRender(long elapsedRealTime, double deltaTime) {
    super.onRender(elapsedRealTime, deltaTime);

    if (videoTexture != null) {
        // update texture from video content
        videoTexture.update();
    }
}

最后但并非最不重要的一点是，您要更新相机以跟踪纸板的运动，如下所示：

@Override
public void onDrawEye(Eye eye) {
    // Rajawali camera
    org.rajawali3d.cameras.Camera currentCamera = getCurrentCamera();

    // cardboard field of view
    FieldOfView fov = eye.getFov();

    // update Rajawali camera from cardboard sdk
    currentCamera.updatePerspective(fov.getLeft(), fov.getRight(), fov.getBottom(), fov.getTop());
    eyeMatrix.setAll(eye.getEyeView());
    // orientation
    eyeOrientation.fromMatrix(eyeMatrix);
    currentCamera.setOrientation(eyeOrientation);
    // position
    eyePosition = eyeMatrix.getTranslation().inverse();
    currentCamera.setPosition(eyePosition);

    // render with Rajawali
    super.onRenderFrame(null);
}

此外，要将其他一些侦听器转发到 carboard sdk，您将需要以下函数：

@Override
public void onSurfaceChanged(int width, int height) {
    // tell Rajawali that cardboard sdk detected a size change
    super.onRenderSurfaceSizeChanged(null, width, height);
}

@Override
public void onSurfaceCreated(EGLConfig eglConfig) {
    // pass opengl config to Rajawali
    super.onRenderSurfaceCreated(eglConfig, null, -1, -1);
}

@Override
public void onRenderSurfaceDestroyed(SurfaceTexture surface) {
    super.onRenderSurfaceDestroyed(surface);
}
于 2015-12-23T09:23:18.147 回答