stuck in stop

[xpachin]

when i exit my app, it always get stuck in this line

VlcMediaPlayer.cs ///

/// 设置 为停止 ///

public void Stop() { _stopFunction.Delegate(InstancePointer);<----here! } any solutions? thanks!

[devkanro]

I think you should stop media and release resource before you exit

[xpachin]

that is what in do. but when i stop the media, it get stuck here

[szurgot]

What version of vlc are you using? I was seeing this behavior with 2.2.4, but upgrading to 2.2.6 seems to have resolved it.

[szurgot]

Scratch_ that. I continued to see the problem after after all.

My alternate working theory (that has help up under more testing), is that if the program is in a VLC event handler (position changed, for example) when calling a method on VLC, it can cause it to hang. I was calling Dispatcher.Invoke to update progress, and whenever I hit break on the hanging stop, it was also hung in that method. By calling Dispatcher.InvokeAsync to do the WPF changes, it seems to have overcome that problem for me.

[cc0der]

I had a similar problem when using RebuildPlayer(). If the user quickly switched files (mixed between images and videos), libVLC would sometimes block on the stop()-call.

What I did was make sure the RebuildPlayer() call comes from a thread other than the UI thread (the tip came from the VideoLan Forum). This lead to SystemAccessViolations if separate threads tried to rebuild the player, so I had to additionally lock() the call to RebuildPlayer().

Sounds insane, but now it works flawlessly ;)

// According to https://forum.videolan.org/viewtopic.php?t=106415#p397198
// we need to command libVLC from a thread other than the UI thread
// to make sure it doesn't block in VlcMediaPlayer.Stop()
await Task.Run(() =>
{
    // this looks insane, but we just need a new thread for libVLC to
    // accept commands from, but can't actually rebuild the player with libVLC in
    // a multithreaded manner or we get access violations on destroyed
    // instance pointers
    lock (playerLock)
    {
        Player.RebuildPlayer();
        if (media != null && File.Exists(media))
        {
            Player.LoadMedia(media);
            Player.Play();
        }
    }
});