CODEWITHSUNDEEP
androidvideoxamarinxamarin.android
oisin1min
oisin1min

Reputation: 27

Xamarin- how to record video and save it to a file

I am trying to record a video and save it to a file but I keep getting an error when it comes to the recording. The code is 

using System;         
using Android.App;
using Android.OS;
using Android.Widget;
using Android.Media;
using System.Timers;
using Android.Content;
using System.IO;

namespace ShowHouseDemo2._1
{
    [Activity(Label = "VideoPage", Icon = "@drawable/icon")]
//Intent intent = GetInTent();
class VideoPage : Activity
{

    //Intent string Vid = Intent.GetStringExtra("VidSent");
    MediaRecorder recorder;
    Timer StartTimer;
    int StartCount = 0;
    protected override void OnCreate(Bundle bundle)
    {

        base.OnCreate(bundle);
        SetContentView(Resource.Layout.VidTakerPage);

        var video = FindViewById<VideoView>(Resource.Id.UserVid);
        //string  path = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath.   "/UserVid4.mp4";
        // string path = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath + ;
        var documents = System.Environment.GetFolderPath(System.Environment.SpecialFolder.MyDocuments);
        var filename = Path.Combine(documents, "Write.txt");
        File.WriteAllText(filename, "Write this text into a file!");

        video.StopPlayback();


        recorder = new MediaRecorder();
        recorder.SetVideoSource(VideoSource.Camera);
        recorder.SetAudioSource(AudioSource.Mic);
        recorder.SetOutputFormat(OutputFormat.Default);
        recorder.SetVideoEncoder(VideoEncoder.Default);
        recorder.SetAudioEncoder(AudioEncoder.Default);
        recorder.SetOutputFile(filename);
        recorder.SetPreviewDisplay(video.Holder.Surface);
        recorder.Prepare();
        recorder.Start();

        timerStarted();
    }

    private void timerStarted()
    {
        base.OnResume();
        StartTimer = new Timer();
        StartTimer.Interval = 1000;
        StartTimer.Elapsed += delegate
        {
            while (StartCount < 10)
            {
                if (StartCount == 9)
                {
                    RunOnUiThread(() =>
                    {
                        Intent k = new Intent(this, typeof(TakeVideo));

                        this.StartActivity(k);
                    });
                }
                StartCount++;
            }
        };
    }
}
}

the Error that I get is :

Unhandled Exception: 
Java.IO.IOException: invalid preview surface.

I love any bit of help you can give me. Any questions that you have please ask

Upvotes: 0

Views: 1350

Answers (1)

SushiHangover
SushiHangover

Reputation: 74209

You need to implement the surface callback interface (Android.Views.ISurfaceHolderCallback) and only start using the ISurfaceHolder.Holder when it is available and valid.

You can do this on your VideoPage Activity, i.e.

[Activity(Label = "VideoPage", Icon = "@drawable/icon")]
public class VideoPage : Activity, Android.Views.ISurfaceHolderCallback

Implement the three methods of the interface (SurfaceDestroyed, SurfaceCreated, SurfaceChanged) and then you can assign the callback via the VideoView.Holder.AddCallback:

var video = FindViewById<VideoView>(Resource.Id.UserVid);
video.Holder.AddCallback((this));

Upvotes: 2

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