How do I push out if I have two surfaceviews?

[roybill]

Combine this framework: https://github.com/PaddlePaddle/LiteKit CameraView extends SurfaceView:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/portraitVideoLayout" android:layout_width="match_parent" android:layout_height="match_parent">

<FrameLayout
    android:id="@+id/portraitVideoContentLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentTop="true">

    <!--   CameraView extends SurfaceView   -->
    <com.gooxi.demo4.CameraView
        android:id="@+id/camera_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true" />

    <SurfaceView
        android:id="@+id/mask_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true" />
</FrameLayout>

<RelativeLayout
    android:id="@+id/componentLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_below="@+id/portraitVideoContentLayout">

    <TextView
        android:id="@+id/costTime"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="10dp"
        android:text="x ms"
        android:textSize="22dp" />

</RelativeLayout>

<androidx.appcompat.widget.AppCompatButton
    android:id="@+id/btn_start"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:text="start_push" />

[pedroSG94]

Combine with others libraries could be difficult depend of the way they use to draw frames. You should ask to the owner of the library the way they are drawing frames in the surfaceview and get a way to extract frames to encode using Mediacodec. You have VideoEncoder class in my library to help you encode buffers.