LibVLCSharp.Forms - Trouble switching pages
Posted: 18 Sep 2018 01:09
Hello,
When switching pages using Xamarin.Forms, LibVLCSharp seems to throw a fit, specifically when navigating away from a page with the LibVLCSharp implementation. It's very easy to replicate, on my machine at least, by downloading the LibVLCSharp's samples (i.e. https://github.com/videolan/libvlcsharp) and adding a simple page change. Below is the error I receive, as well as the code for the two pages I use.
So to reiterate,
-Xamarin.Forms (Sample seems to come with 3.0.0.446417)
-Latest LibVLCSharp sample code (as of 18/09/2018 09:03 AEST or 17/09/2018 23:03 GMT)
-Add a new page, and navigate to it from the page with the LibVLCSharp implementation
-Run iOS example code (i.e. LibVLCSharp.Forms.Sample.iOS)
-Observe error????
Error
MainPage.xaml
MainPage.xaml.cs
Page1.xaml
Page1.xaml.cs
Please let me know if any more information is needed.
Cheers,
Rickers
When switching pages using Xamarin.Forms, LibVLCSharp seems to throw a fit, specifically when navigating away from a page with the LibVLCSharp implementation. It's very easy to replicate, on my machine at least, by downloading the LibVLCSharp's samples (i.e. https://github.com/videolan/libvlcsharp) and adding a simple page change. Below is the error I receive, as well as the code for the two pages I use.
So to reiterate,
-Xamarin.Forms (Sample seems to come with 3.0.0.446417)
-Latest LibVLCSharp sample code (as of 18/09/2018 09:03 AEST or 17/09/2018 23:03 GMT)
-Add a new page, and navigate to it from the page with the LibVLCSharp implementation
-Run iOS example code (i.e. LibVLCSharp.Forms.Sample.iOS)
-Observe error????
Error
Code: Select all
2018-09-18 08:21:05.072 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: Stacktrace:
2018-09-18 08:21:05.072 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at <unknown> <0xffffffff>
2018-09-18 08:21:05.073 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at (wrapper managed-to-native) LibVLCSharp.Shared.MediaPlayer/Native.LibVLCMediaPlayerSetNsobject (intptr,intptr) [0x0000a] in <847eb8651d0b443393ba31624bef2516>:0
2018-09-18 08:21:05.073 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at LibVLCSharp.Shared.MediaPlayer.set_NsObject (intptr) [0x00000] in C:\Users\dog\OneDrive\Documents\Projects\testing\libvlcsharp-master\LibVLCSharp\Shared\MediaPlayer.cs:755
2018-09-18 08:21:05.073 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at LibVLCSharp.Platforms.iOS.VideoView.Detach () [0x00000] in C:\Users\dog\OneDrive\Documents\Projects\testing\libvlcsharp-master\LibVLCSharp\Platforms\iOS\VideoView.cs:24
2018-09-18 08:21:05.073 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at LibVLCSharp.Platforms.iOS.VideoView.Dispose (bool) [0x00009] in C:\Users\dog\O
neDrive\Documents\Projects\testing\libvlcsharp-master\LibVLCSharp\Platforms\iOS\VideoView.cs:30
2018-09-18 08:21:05.073 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.14/src/Xamarin.iOS/Foundation/NSObject2.cs:147
2018-09-18 08:21:05.073 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at LibVLCSharp.Forms.Platforms.iOS.VideoViewRenderer.Dispose (bool) [0x00009] in C:\Users\dog\OneDrive\Documents\Projects\testing\libvlcsharp-master\LibVLCSharp.Forms\Platforms\iOS\VideoViewRenderer.cs:40
2018-09-18 08:21:05.074 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.14/src/Xamarin.iOS/Foundation/NSObject2.cs:147
2018-09-18 08:21:05.074 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at Xamarin.Forms.Platform.iOS.Platform.DisposeModelAndChildrenRenderers (Xamarin.Forms.Element)
[0x00038] in D:\a\1\s\Xamarin.Forms.Platform.iOS\Platform.cs:238
2018-09-18 08:21:05.074 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at Xamarin.Forms.Platform.iOS.Platform.System.IDisposable.Dispose () [0x00048] in D:\a\1\s\Xamarin.Forms.Platform.iOS\Platform.cs:84
2018-09-18 08:21:05.074 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at Xamarin.Forms.Platform.iOS.FormsApplicationDelegate.UpdateMainPage () [0x00022] in D:\a\1\s\Xamarin.Forms.Platform.iOS\FormsApplicationDelegate.cs:181
2018-09-18 08:21:05.074 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at Xamarin.Forms.Platform.iOS.FormsApplicationDelegate.ApplicationOnPropertyChanged (object,System.ComponentModel.PropertyChangedEventArgs) [0x00012] in D:\a\1\s\Xamarin.Forms.Platform.iOS\FormsApplicationDelegate.cs:142
2018-09-18 08:21:05.074 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at Xamarin.Forms.BindableObject.OnPropertyChanged (string) [0x0000a] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:153
2018-09-
18 08:21:05.075 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at Xamarin.Forms.Element.OnPropertyChanged (string) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:402
2018-09-18 08:21:05.075 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at Xamarin.Forms.Application.set_MainPage (Xamarin.Forms.Page) [0x0008b] in D:\a\1\s\Xamarin.Forms.Core\Application.cs:98
2018-09-18 08:21:05.075 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at LibVLCSharp.Forms.Sample.MainPage/<>c.<get_ChangeToMain>b__4_1 () [0x00001] in C:\Users\dog\OneDrive\Documents\Projects\testing\libvlcsharp-master\LibVLCSharp.Forms.Sample\LibVLCSharp.Forms.Sample\MainPage.xaml.cs:33
2018-09-18 08:21:05.075 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at Foundation.NSAsyncActionDispatcher.Apply () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.14/src/Xamarin.iOS/Foundation/NSAction.cs:152
2018-09-18 08:21:05.075 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at (wrapper run
time-invoke) object.runtime_invoke_void__this__ (object,intptr,intptr,intptr) [0x00020] in <3c7b99a36820490fb2cbc5a6fc6b06d8>:0
2018-09-18 08:21:05.075 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at <unknown> <0xffffffff>
2018-09-18 08:21:05.075 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) [0x0005c] in <4ab8db046af64ab0ae036378dae8bfd3>:0
2018-09-18 08:21:05.076 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at UIKit.UIApplication.Main (string[],intptr,intptr) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.14/src/Xamarin.iOS/UIKit/UIApplication.cs:79
2018-09-18 08:21:05.076 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at UIKit.UIApplication.Main (string[],string,string) [0x0002c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.14/src/Xamarin.iOS/UIKit/UIApplication.cs:63
2018-09-18 08:21:05.076 LibVLCSharp.Forms.Sample.iOS[34124:547
7535] critical: at LibVLCSharp.Forms.Sample.iOS.Application.Main (string[]) [0x00001] in C:\Users\dog\OneDrive\Documents\Projects\testing\libvlcsharp-master\LibVLCSharp.Forms.Sample\LibVLCSharp.Forms.Sample.iOS\Main.cs:17
2018-09-18 08:21:05.076 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) [0x00051] in <dad3fc70e9dd4c74aaa688b503fc7d6b>:0
2018-09-18 08:21:05.076 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical:
Native stacktrace:
2018-09-18 08:21:05.129 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 0 LibVLCSharp.Forms.Sample.iOS 0x000000010e4de544 mono_handle_native_crash + 244
2018-09-18 08:21:05.129 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 1 LibVLCSharp.Forms.Sample.iOS 0x000000010e4ecfd0 mono_sigsegv_signal_handler + 288
2018-09-18 08:21:05.129 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 2 libsystem_platform.dylib 0x0000000121404f5a _sigtramp + 26
2018-09-18 08:21:05.129 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 3 ??? 0x0000ffff00001fa3 0x0 + 281470681751459
2018-09-18 08:21:05.130 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 4 ??? 0x00000001402a9553 0x0 + 5371499859
2018-09-18 08:21:05.130 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 5 ??? 0x000000014014995c 0x0 + 5370059100
2018-09-18 08:21:05.130 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 6 ??? 0x0000000140146ba0 0x0 + 5370047392
2018-09-18 08:21:05.130 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critic
al: 7 ??? 0x000000013e6204fe 0x0 + 5341578494
2018-09-18 08:21:05.130 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 8 LibVLCSharp.Forms.Sample.iOS 0x000000010e4f00f3 mono_jit_runtime_invoke + 1443
2018-09-18 08:21:05.130 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 9 LibVLCSharp.Forms.Sample.iOS 0x000000010e5d7cd4 mono_runtime_try_invoke + 148
2018-09-18 08:21:05.130 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 10 LibVLCSharp.Forms.Sample.iOS 0x000000010e5d9ab6 mono_runtime_invoke + 38
2018-09-18 08:21:05.130 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 11 LibVLCSharp.Forms.Sample.iOS 0x000000010e3bcaf8 _ZL31native_to_managed_trampoline_20P11objc_objectP13objc_selectorPP11_MonoMethodj + 248
2018-09-18 08:21:05.130 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 12 LibVLCSharp.Forms.Sample.iOS 0x000000010e3c1074 -[__MonoMac_NSAsyncActionDispatcher xamarinApplySelector] + 52
2018-09-18 08:2
1:05.131 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 13 Foundation 0x000000011e74fd5e __NSThreadPerformPerform + 330
2018-09-18 08:21:05.131 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 14 CoreFoundation 0x000000011f71cbb1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
2018-09-18 08:21:05.131 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 15 CoreFoundation 0x000000011f701574 __CFRunLoopDoSources0 + 468
2018-09-18 08:21:05.131 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 16 CoreFoundation 0x000000011f700a6f __CFRunLoopRun + 1263
2018-09-18 08:21:05.131 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 17 CoreFoundation 0x000000011f70030b CFRunLoopRunSpecific + 635
2018-09-18 08:21:05.131 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 18 GraphicsServices 0x00000001216e4a73 GSEventRunModal + 62
2018-09-18 08:21:05.131 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 19 UIKit 0x000000011c554057 UIApplicationMain + 159
2018-09-18 08:21:05.131 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical: 20 ??? 0x000000013f6422ae 0x0 + 5358494382
2018-09-18 08:21:05.131 LibVLCSharp.Forms.Sample.iOS[3412
4:5477535] critical: 21 ??? 0x000000013f642043 0x0 + 5358493763
2018-09-18 08:21:05.132 LibVLCSharp.Forms.Sample.iOS[34124:5477535] critical:
=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================
MainPage.xaml
Code: Select all
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:shared="clr-namespace:LibVLCSharp.Forms.Shared;assembly=LibVLCSharp.Forms"
x:Class="LibVLCSharp.Forms.Sample.MainPage">
<Grid HorizontalOptions="Fill" VerticalOptions="Fill">
<shared:VideoView x:Name="videoView" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand"/>
<Label Text="Please work!" HorizontalOptions="Center" VerticalOptions="End" BackgroundColor="White" TextColor="Black">
<Label.GestureRecognizers>
<TapGestureRecognizer Command="{Binding ChangeView}" ></TapGestureRecognizer>
</Label.GestureRecognizers>
</Label>
</Grid>
</ContentPage>MainPage.xaml.cs
Code: Select all
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class MainPage : ContentPage
{
public MainPage()
{
InitializeComponent();
this.BindingContext = this;
}
protected override void OnAppearing()
{
base.OnAppearing();
videoView.MediaPlayer.Play(new Media(videoView.LibVLC,"http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4", Media.FromType.FromLocation));
}
private ICommand changeView;
public ICommand ChangeView
{
get
{
if (this.changeView== null)
{
this.changeView= new Command(() =>
{
App.Current.MainPage = new LibVLCSharp.Forms.Sample.Page1();
});
}
return this.changeView;
}
}
}Page1.xaml
Code: Select all
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="LibVLCSharp.Forms.Sample.Page1">
<ContentPage.Content>
<StackLayout>
<Label Text="App is not crashing!"
VerticalOptions="CenterAndExpand"
HorizontalOptions="CenterAndExpand">
</Label>
</StackLayout>
</ContentPage.Content>
</ContentPage>Page1.xaml.cs
Code: Select all
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class Page1 : ContentPage
{
public Page1()
{
InitializeComponent();
}
}Cheers,
Rickers