Can i use the multi party feature in xamarin? How?

Hi,
When we start chat, there is a popup which populated by default over the screen. user have to close it then we can see other user video. can we remove/close it automatically? or there is any mechanism to not show the popup by default?
Please suggest me if it is possible. Thanks

I have an app where I have two views. I want to populate them based on the first and second id in the collection. I need to manually bind these IDs but I do not know when the CrossOpenTok.Current.StreamIdCollection object will be populated. I am force to do a while loop and check the collection. Having an event to let us know that a the collection changed would be very helpful.

Hi Andrei,
And how to do Audio call only ?

I have first screen in which I have one publisher and subscriber view which works great. I navigate to next screen by PushModelAsync and I have a ListView in next screen. I have a subcriberView in the ItemTemplate of the listview which is binded to StreamIdCollection.

When I launch app, i see first screen and i can see publisher and subscriber. I go to see participants on the next screen. It works. I come back and go again to see the participants but app crashes with following exception:

{System.MissingMethodException: No constructor found for http://Xamarin.Forms.OpenTok.Android.OpenTokSubscriberViewRenderer::.ctor(System.IntPtr, Android.Runtime.JniHandleOwnership) ---> Java.Interop.JavaLocationException: Exception of type 'Java.Interop.JavaLocationE…}

I tried to add such a constructor but ViewRenderer does not have a constructor which takes these two arguments. It only takes one argument (Context).

iOS is working fine. Problem is only with Android. In iOS, upon navigating back to first screen, SubscriberView automatically binds to StreamIdCollection property but does not.

Hello Andrei, thank you for this great plugin!
I have a slight problem with the permissions.
My use case is audio only, so that I don't need camera permissions. Is there any way to prevent the app from asking the user to enable camera permissions?

Also, on Android, is there an option to not ask for local storage permissions?
I need to ask only for microphone permissions.

Thank you.

can you pls update

Hi Andrei,

There is a feature very important and I think will be helpful for many people the integration of SDK with ReplayKit from Apple to share the screen.

The user will be able to share the screen of the App and navigate between other screen.

Is there one way to share the screen using the OpenTok?

Many Thanks.

When I use at least one of the two views (Publisher or Subscriber) inside the AbsoluteLayout, the publisher view is getting hidden once subscriber stream is loaded. Is there a workaround from Lib about that?

Hi Andrei,
I am coding a combined website and mobile app solution. its online-tutoring solution,

When I change from video share to screen share on the site the xamarin nuget solution does not pick up the change and re-subscribe.
if I change back to video share - it does re-subscribe.
Can you include this?

Or is there a way I can react to an event where I see its now screen-share video and then re-initialise?

Weirdly, if I end the session and init it again then it subscribes to the screen share video.

in java script I do this

session.on('streamCreated', function(event)
{
console.log("New stream in the session: " + event.stream.streamId);
console.log("New stream in the session: " + event.stream.videoType);

            if (event.stream.videoType == 'camera')
            {
                var elem = document.getElementById("subscriber");
                elem.style.display = "block";
                var elem = document.getElementById("whiteboard");
                elem.style.display = "none";
                subscriber = Null = session.subscribe(event.stream, 'subscriber',
                {
                    insertMode: 'append',
                    width: '100%',
                    height: '100%',
                }, handleError);
            }
            else
            if (event.stream.videoType == 'screen')
            {
                var elem = document.getElementById("subscriber");
                elem.style.display = "none";
                var elem = document.getElementById("whiteboard");
                elem.style.display = "block";
                subscriber = Null = session.subscribe(event.stream, 'whiteboard',
                {
                    insertMode: 'append',
                    width: '100%',
                    height: '100%',
                }, handleError);
            };
        }
    );

java.lang.IllegalArgumentException: already added : Lcom/google/devtools/build/android/desugar/runtime/ThrowableExtension;

please help...

Hi, i have a problem whit Xamarin Android Implementation.

is there a solution to this?

After development, I submitted the App to AppStore, I received the following mail. In our code, we don't use any WebView APIs. Is this the problem with your library.

ITMS-90809: Deprecated API Usage - Apple will stop accepting submissions of new apps that use UIWebView APIs starting from April 2020.

If yes, can you kindly let us know the alternate?

Thanks,
MTK.

Can i implement text chat using opentok ? if yes can you pls guid me with sample(xamarin.forms)

I tried 2 approaches and none of them work

1. By setting "GetStreamVolume" in "OnCreate" method

AudioManager audio = (AudioManager)GetSystemService(Context.AudioService); audio.GetStreamVolume(Android.Media.Stream.Music); 

2. Set "VolumeControlStream"

 VolumeControlStream = Android.Media.Stream.Music;

Any help? please.

If you refer to this documentation page on TokBox site:
https://tokbox.com/developer/guides/customize-ui/android/index.html#audio_levels

They have a method for android to get Audio Levels information for each subscriber and publisher. Can we have this in Xamarin Forms SDK or a way to add this using Renderer/ Dependancy service ?
Below is the sample method from native Android documentation:

@Override public void onAudioLevelUpdated( SubscriberKit subscriber, float audioLevel) { // Adjust an audio meter UI element based on the audioLevel value. }

https://www.nuget.org/packages/Xamarin.Vonage.iOS/
https://www.nuget.org/packages/Xamarin.Vonage.Android/

Hi Andrei, is there any possibility to include a pre-call test to check the connection upfront?!
I saw samples in javascript and native ios and android but nothing in xamarin so far.

Regards - Wolfgang

Hello, excellent project. I am making an app in Xamarin for health, and I would like to integrate video calls, is it possible to do this with UWP?

Best regards.

Hi,
I'm trying to implement a video chat application, i have to add the feature to mute and unmute audio as well video. How can I do it with it. Thanks in advance.

Hello Andrei,

I'm using your nutget, at some point I made a call and ended it, then I tried to make another call a few minutes later and I saw that there were problems with the visualization of one of the cameras.

The question is, is there something that can be done on your project side or mine to prevent the following error:

com.opentok.android.Camera2VideoCapturer.initCamera
com.opentok.android.Camera2VideoCapturer$Camera2Exception: CAMERA_IN_USE (4): connectHelper:1607: Higher-priority client using camera, ID "1" currently unavailable

Open
Stack traces

com.opentok.android.Camera2VideoCapturer.initCamera
com.opentok.android.Camera2VideoCapturer.a
com.opentok.android.Camera2VideoCapturer.lambda$EOJ6zJ_KyEal1aLQznxfTJOPcJc
com.opentok.android.-$$Lambda$Camera2VideoCapturer$EOJ6zJ_KyEal1aLQznxfTJOPcJc.run
com.opentok.android.Camera2VideoCapturer$4.onClosed
android.hardware.camera2.impl.CameraDeviceImpl$5.run CameraDeviceImpl.java:215
android.os.Handler.handleCallback Handler.java:883
android.os.Handler.dispatchMessage Handler.java:100
android.os.Looper.loop Looper.java:224
android.app.ActivityThread.main ActivityThread.java:7565
java.lang.reflect.Method.invoke Method.java
com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run RuntimeInit.java:539
com.android.internal.os.ZygoteInit.main ZygoteInit.java:950

Best regards.

Anyone can help me? I need how to build the "create session" section like on web.
Thanks

I have integrated the provided github solution, but there is not "Key URL" provided.
Please suggest from where I can get the key url for my project used in the below snippet:

using (var client = new HttpClient())
           {
               try
               {
                   var resp = await client.GetAsync(Config.KeysUrl);
                   var json = await resp.Content.ReadAsStringAsync();
                   var keys = JsonConvert.DeserializeObject<Keys>(json);

                   CrossOpenTok.Current.ApiKey = keys.ApiKey;
                   CrossOpenTok.Current.SessionId = keys.SessionId;
                   CrossOpenTok.Current.UserToken = keys.Token;
               }
               catch
               {
                   await DisplayAlert(null, "MAKE SURE YOU SET API URL FOR RETRIEVING NECESSARY KEYS (Config.cs) OR YOU MAY HARDCODE THEM.", "GOT IT");
               }

Hello,

I have been using your nutget and I like it. but with great frequency, I get this exception in android: android.os.MessageQueue android.os.Looper.mQueue.

Here I leave a trace a little longer before reaching the error:

Java.Interop
JniEnvironment + InstanceMethods.CallObjectMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue * args)
Java.Interop
JniPeerMembers + JniInstanceMethods.InvokeVirtualObjectMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue * parameters)
Com.Opentok.Android
Session + Builder.Build ()
Xamarin.Forms.OpenTok.Android.Service
PlatformOpenTokService.TryStartSession () /Users/andrei/Desktop/tokBox/Lib/Xamarin.Forms.OpenTok.Android/Service/PlatformOpenTokService.cs:68

Best regards,

Hi,

this is query
I implemented this plugin in my xamarin forms project, created account obtained key, session and token but OpenTokSubscriberView not showing anything. is there any specific configuration needed or else? or how subscriberview works

Hi,
When I change the view of the ChatRoomPage.xaml, the publisher view is getting hidden once subscriber stream is loaded. how can I fix it?

Thanks.

Hi Andrei,

is it possible to to switch to screen sharing in this package?

If not can you put it in?

Regards
Byron

Following the sample app, when I attempt to end the call and click the "End Call" button, I get the following exception:

Looking at the stack trace, I found the error to be caused by these lines:
Line 93 @ PlatformOpenTokService.cs _subscriberStreamIds.Clear();
Line 98 @ BaseOpenTokService.cs protected void OnSubscriberStreamIdsCollectionChanged(object sender, NotifyCollectionChangedEventArgs => StreamIdCollectionChanged(sender, e);

Here is the full stack trace

System.NullReferenceException: Object reference not set to an instance of an object
  at Xamarin.Forms.OpenTok.Service.BaseOpenTokService.OnSubscriberStreamIdsCollectionChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00000] in /Users/andrei/Desktop/tokBox/Lib/Xamarin.Forms.OpenTok/Service/BaseOpenTokService.cs:98
  at at (wrapper delegate-invoke) <Module>.invoke_void_object_NotifyCollectionChangedEventArgs(object,System.Collections.Specialized.NotifyCollectionChangedEventArgs)
  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00018] in <079b3c6f37014c7f868f66c7f0ec79f9>:0
  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionReset () [0x00000] in <079b3c6f37014c7f868f66c7f0ec79f9>:0
  at System.Collections.ObjectModel.ObservableCollection`1[T].ClearItems () [0x00018] in <079b3c6f37014c7f868f66c7f0ec79f9>:0
  at System.Collections.ObjectModel.Collection`1[T].Clear () [0x00014] in <b2309b0f34c14f2999df87941bbffcf9>:0
  at Xamarin.Forms.OpenTok.iOS.Service.PlatformOpenTokService.EndSession () [0x00059] in /Users/andrei/Desktop/tokBox/Lib/Xamarin.Forms.OpenTok.iOS/Service/PlatformOpenTokService.cs:93
  at InterQR.Views.MyPage.OnEndCall (System.Object sender, System.EventArgs e) [0x0006b] in /InterQR-App/InterQR/Views/MyPage.xaml.cs:19
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.<ThrowAsync>b__7_0 (System.Object state) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/AsyncMethodBuilder.cs:1021
  at Foundation.NSAsyncSynchronizationContextDispatcher.Apply () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.20.2.2/src/Xamarin.iOS/Foundation/NSAction.cs:178
  at at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain(int,string[],intptr,intptr)
  at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.20.2.2/src/Xamarin.iOS/UIKit/UIApplication.cs:86
  at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0000e] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.20.2.2/src/Xamarin.iOS/UIKit/UIApplication.cs:65
  at InterQR.iOS.Application.Main (System.String[] args) [0x00001] in /InterQR-App/InterQR.iOS/Main.cs:18

It is not showing the video of what is being filmed on the iphone screen (iphone 6s iOS 13.4). Android is correct, I was the one who requested the focus recently. Now I went to test on the iphone and I couldn't, follow my xaml.

Note: In the app that receives the video it is possible to see the transmission, both in the front and back cameras, but on the screen itself is all white.

xaml.txt

Hi @AndreiMisiukevich for android its working fine, but for iPhone i did not get video layer for publisher and subscriber view. but on other hand(server side) my video is showing. microphone is working fine with both end. i have added PlatformOpenTokService.Init(); in aapdelegate.cs file. is there anything else which i need to add or configure. Please help.

Im using Xamarin.Opentok.Android -2.18.1, im able to create video call from my android app. When i tried to upgrade the app target version to 10, video call is not working.
We have developed a telemedicine app using Xamarin-4.8. The app is live in certain regions. we have built for both android and ios. we updated the app recently and uploaded on play store. a lot of customers who are on android 10 and 11 started complaining that the app is not working and compatible with their versions.
we did a thorough investigation to check why the app is not working for android 10.
Our findings are mentioned below :

1. We were using the old namespace Xamarin.Opentok.Android. we replaced this with Xamarin.Vonage.Android as the forums said that Xamarin.Opentok.Android is deprecated.
   2.Its working up to android-9 version, when we change the version to android-10 we are facing "System.MissingFieldException: 'Field not found: int .Animation.btn_checkbox_to_checked_box_inner_merged_animation Due to: Could not find field in class' ".
   3.When we remove the dependencies of Opentok we are able to compile the application for Android-10.
   4.Our understanding is that the "PlatformOpenTokService.Init();" class in not getting initialized and hence it is allowing us to compile on Android-10.
   5.We were able to compile up to [Android-9.](url
   
   )

Hi,
I need to publish my front camera to multiple 1:1 sessions. What should I do to achieve that? I tried to modify OpenTokPlatformService class to create multiple instances, but unfortunately when my device was publishing to the second session the stream in the first one stopped.
I hope to hear back from you soon.
Dung

Hi Friend,
I want to show a message to publisher as "Video paused by other party" when subscriber pauses the video. How to achieve it?

I'm currently trying to use this library to start a multiparty video chat, but it's not quite working as expected. When the third user joins the session, he acts as a view only subscriber as opposed to a publisher. This means the first two users don't see or hear his stream, and he only sees the first users stream. Is there a method I'm missing to enable multiparty?

Hello, I've followed all steps and looked at the sample code but any time I try running on a physical device I get this same error.
Severity Code Description Project File Line Suppression State Error java/lang/String;)Lorg/webrtc/VideoDecoder;: defining a default interface method requires --min-sdk-version >= 24 (currently 13) for interface methods: org.webrtc.VideoDecoderFactory.createDecoder : (Ljava/lang/String;)Lorg/webrtc/VideoDecoder; VoiceChatTest.Android

Im very sure that my SDK is greater than 24, is there a solution to this?

Congratulations on the project.

I would like to know if it is possible to improve the focus on the video. I need to show a TV tag, but the camera is blurry.

For testing I'm using a Moto G7 Power 64GB 4GB OctaCore 1.8GHz 6.2 "12MP.

Hello Andrei,

Is there the possibility of implementing an event that allows us to be notified when a session from the other end has ended session? something similar to this Session.StreamDropped event?

Best regards,

Hi Andrei! nice work porting Opentok library to Xamarin.Forms. I've been using a mix of native library to Xamarin.Android/Xamarin.iOS in Xamarin.Forms project. I've been testing this plugin but I miss the event when the other person ends the videocall, OnSessionEnded(). I'm trying to catch it in CrossOpenTok.Current.PropertyChanged += (sender, e) => {...} the combination when that happens, but it's not clear when the call is ended, because IsPublishingStarted and IsSessionStarted begins with value = false, and event updated more than twice before video call is ended. All of this is for manage the Navigation.PopAsync().

Could you have an idea of how to handle it?

Regards!

Hi,

is there a way to make a snapshot of the current Publisher stream?
I tried it in PlatformOpenTokService with the following:

  if (PublisherKit == null)
                return null;

            var rootView = PublisherKit.View;

            using (var screenshot = Bitmap.CreateBitmap(
                                    rootView.Width,
                                    rootView.Height,
                                    Bitmap.Config.Argb8888))
            {
                var canvas = new Canvas(screenshot);
                rootView.Draw(canvas);

                using (var stream = new MemoryStream())
                {
                    screenshot.Compress(Bitmap.CompressFormat.Jpeg, 100, stream);
                    return stream.ToArray();
                }
            }

But I only get a black image in return. Do you habe any suggestions?

BR
Wolfgang

BTW. Signaling is working perfectly!

Hi @AndreiMisiukevich,
how to implement ring feature using this library?

I downloaded this repo and hardcoded keys in App.cs. When I run the project on iOS and Android, nothing is happening when I click the click to chat button. On Android, it does ask for permissions, but I cannot get the ChatRoomPage to push.

https://tokbox.com/developer/tutorials/android/text-chat/

Hi, is there any option to control the audio volume?

Hello Andrei,

Great work! It works perfect. Only one question, how can I include _subscriberView or _publisherView in xaml page?

Thanks in advance.