How to rotate ExoPlayer

Question

In my application, I show the video with google Exoplayer.
I am trying to solve a task: enter the full screen.
To achieve my objective, I rotate my ExoPlayer by N degrees.

<com.google.android.exoplayer2.ui.SimpleExoPlayerView
                android:id="@+id/player_view"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:rotation="32.342532532523"
                app:controller_layout_id="@layout/playback_control_view"
                app:resize_mode="fill" />

But with this rotation property only SimpleExoPlayerView is rotated, but not the video inside. Just like that:

My question is how to force Exoplayer to rotate not only his own bounds but his contents too.

Answer 1

使用曲面类型的纹理视图。默认情况下，ExoPlayerView使用SurfaceView作为其底层实现，在这种情况下不起作用。

        <com.google.android.exoplayer2.ui.SimpleExoPlayerView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:rotation="32.342532532523"
            app:surface_type="texture_view"
            />

Answer 2

exoplay不支持旋转，但可以使用技巧： 解决方案一：旋转视图 解决方案二：按纹理视图矩阵旋转。 我使用的是解决方案二，但是在旋转成功纹理而不更新渲染帧时遇到了一些问题，必须运行视频才能更新新的旋转。 我用于预览的代码在编辑之前先旋转视频：

 @Override
public void onAspectRatioUpdated(float targetAspectRatio, float naturalAspectRatio, boolean aspectRatioMismatch) {
    new Handler(Looper.getMainLooper()).post(() -> {
        TextureView textureView = (TextureView) getPlayerView().getVideoSurfaceView();
        textureView.setVisibility(View.INVISIBLE);
        applyTextureViewRotation(textureView, mPresenter.getRotation());
        textureView.setVisibility(View.VISIBLE);
        mPresenter.checkPlayAgain();
    });
}
public void checkPlayAgain() {
    if (mPlayer == null) {
        isResume = false;
        return;
    }
    if (isResume) {
        mPlayer.seekTo(cachePos);
        mPlayer.setPlayWhenReady(true);
    } else {
        mPlayer.seekTo(cachePos + 100);
        mPlayer.seekTo(cachePos - 100);
    }
}
public static void applyTextureViewRotation(TextureView textureView, int textureViewRotation) {
    float textureViewWidth = textureView.getWidth();
    float textureViewHeight = textureView.getHeight();
    if (textureViewWidth == 0 || textureViewHeight == 0 || textureViewRotation == 0) {
        textureView.setTransform(null);
    } else {
        Matrix transformMatrix = new Matrix();
        float pivotX = textureViewWidth / 2;
        float pivotY = textureViewHeight / 2;
        transformMatrix.postRotate(textureViewRotation, pivotX, pivotY);

        // After rotation, scale the rotated texture to fit the TextureView size.
        RectF originalTextureRect = new RectF(0, 0, textureViewWidth, textureViewHeight);
        RectF rotatedTextureRect = new RectF();
        transformMatrix.mapRect(rotatedTextureRect, originalTextureRect);
        transformMatrix.postScale(
                textureViewWidth / rotatedTextureRect.width(),
                textureViewHeight / rotatedTextureRect.height(),
                pivotX,
                pivotY);
        textureView.setTransform(transformMatrix);
    }
}

我只需要将AspectRatioFrameLayout的比例从端口更改为陆地，希望它可以为您提供帮助。 applyTextureViewRotation是exo的私有功能，您可以在源项目exo中找到它。也许exoplayer将很快支持旋转预览视频

Answer 3

Exo播放器自动管理旋转。您只需使用SimpleExoPlayerView：

<com.google.android.exoplayer2.ui.SimpleExoPlayerView 
        android:id="@+id/player_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:resize_mode="fill"/>

您可以使用app:controller_layout_id自定义Exo播放器视图：

app:controller_layout_id="@layout/your_layout"