android 高分辨率设备上播放低分辨率电视直播源怎么让视频左右不黑边

我用的是JCVideoplayer来播放视频源，我重写onMeasure发现视频窗口没了。现在我用的
是scaleX 强行把X轴变拉长，但是这样会造成其他控件变形
private JCVideoPlayerStandard jcVideoPlayerStandard;
jcVideoPlayerStandard = findViewById(R.id.video_player);
jcVideoPlayerStandard.setUp(mediaModel.getVideoUrl()
, JCVideoPlayerStandard.SCREEN_WINDOW_FULLSCREEN, mediaModel.getTitle());
jcVideoPlayerStandard.startPlayLocic();

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

<fm.jiecao.jcvideoplayer_lib.JCVideoPlayerStandard
    android:id="@+id/video_player"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

    />

<TextView
    android:id="@+id/tv_channel"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_margin="40dp"
    android:text="15"
    android:textColor="@color/detail_background"
    android:textSize="60sp" />