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Android – Playing MP4 in VideoView – no video but audio (Z-Order Doesn't Work) – Photoshop

I’m trying to do a simple test playing an MP4 in a VideoView, but I can only hear audio. I’ve already tried the Z-order trick as suggested in other posts, but it didn’t work.

TestLayout.axml:

     <?xml version="1.0" encoding="utf-8"?>
        <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/testLayout"
            android:clipChildren="false">
                <VideoView
                android:id="@+id/testVideo"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:visibility="visible"/>
  <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:paddingLeft="10dp"
    android:paddingRight="20dp"
    android:paddingTop="170dp"
    android:paddingBottom="100dp"
    android:clipChildren="false"
    android:clipToPadding="false">
      <ImageButton
        android:id="@+id/play"
        android:layout_height="20dp"
        android:layout_width="60dp"
        android:background="@android:color/transparent"
        android:adjustViewBounds="false"
        android:src="@drawable/play"
        android:scaleType="fitXY"
        android:padding="0dp"/>
</LinearLayout>
        </RelativeLayout>

TestActivity.cs (button trigger code):

    var videoView = (VideoView)FindViewById(Resource.Id.testVideo);
    videoView.SetVideoURI(Android.Net.Uri.Parse("android.resource://" + PackageName + "/" +Resource.Raw.testVideo));
    videoView.SetMediaController(null);
    videoView.RequestFocus();
    ISurfaceHolder holder = videoView.Holder;
    holder.SetType(SurfaceType.PushBuffers);
    videoView.Start();
    videoView.SetZOrderMediaOverlay(true);
    videoView.SetZOrderOnTop(true);

Any other suggestions?

MP4 is H.264 encoded using Photoshop and is 320×240.

Tags:

2

Answers


  1. 0

    You could try making the LinearLayout that is on top of the VideoView invisible when you play the movie and visible again once the video has finished.

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  2. 0

    There are lots of factors to review.

    • If you are hearing the audio, the video is playing, but the video is not being decoded and displayed as expected.

    • Is this happening on an emulator or physical device?

      • If emulator, re-test on physical device

    • Are you using a H.264 Baseline Profile codec for encoding?

      • Different apps produce different versions of H.264, try encoding via a different app, i.e. ffmpeg

    • What Android API version?

      • Different versions support different codecs, review the Android docs

    • Implement MediaPlayer.IOnInfoListener and MediaPlayer.IOnErrorListener and review the MediaInfo and MediaError that you might be getting.

    Note: I have found that Xamarin’s Android Player fails on videos that play fine on Genymotion, same goes for AVD and BlueStacks. In the end, test on physical devices

    Create a simple test app for testing your videos and review the OnError and OnInfo parameters.

    IOnInfoListener/IOnErrorListener Example:

    [Activity(Label = "DroidVideo", MainLauncher = true, Icon = "@mipmap/icon")]
public class MainActivity : Activity, MediaPlayer.IOnInfoListener, MediaPlayer.IOnErrorListener
{
    public bool OnError(MediaPlayer mp, [GeneratedEnum] MediaError what, int extra)
    {
        Log.Debug("Media", what.ToString());
        return true;
    }

    public bool OnInfo(MediaPlayer mp, [GeneratedEnum] MediaInfo what, int extra)
    {
        Log.Info("Media", what.ToString());
        return true;
    }

    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        SetContentView(Resource.Layout.Main);

        Button button = FindViewById<Button>(Resource.Id.myButton);
        button.Click += delegate { 
            VideoView video = FindViewById<VideoView>(Resource.Id.myVideo);
            video.SetOnInfoListener(this);
            var videoUri = Android.Net.Uri.Parse("android.resource://" + Path.Combine(PackageName, "raw", Resource.Raw.pool.ToString()));
            video.SetVideoURI(videoUri);
            video.Start();
        };
    }
}

    Layout for the example:

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <Button
        android:id="@+id/myButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
    <VideoView
        android:id="@+id/myVideo"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
            />
</LinearLayout>
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