Video is not coming in WZPlayerView Android

Try Init sdk before playing and play video using View ClickListener

sGoCoderSDK = WowzaGoCoder.init(this, SDK_SAMPLE_APP_LICENSE_KEY);

_bTest.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        playStream();
    }
});

I got the same problem, I can hear the audio but can't see the video