Windows form hangs forever when playing video and hit close button

[namcigar]

Windows form hang forever

I used FFME in a simple windows form project (host media element with ElementHost) and it hanged when I play a video and hit Close button. Please help.

Issue Categories

• [x] Bug
• [ ] Feature Request
• [ ] Question
• [x] Not sure

Version Information

• [x] NuGet Package 4.2.330
• [x] Build From Master branch, Commit e3cac5d

Steps to Reproduce

1. Hit play button:

   private async void btnPlay_Click(object sender, EventArgs e)
       {
           var url = textBox1.Text;
           var target = new Uri(url);
           await mediaElement.Open(target);
           await mediaElement.Play();
       }

2. Form closing event:

   private void Form1_FormClosing(object sender, FormClosingEventArgs e)
       {
           mediaElement.Close();
       }

3. Hit close button and form will hang forever
4. Here are log messages:

   [57:35.989 | DBG | Engine.Commands     ] Direct Command 'Close' accepted. Perparing execution.
   [57:36.062 | INF | Container           ] OnStreamReadInterrupt was requested an immediate read exit.
   [57:36.100 | DBG | Engine.Commands     ] Dispose Entered. Waiting for Command Manager processor to stop.
   [57:36.100 | DBG | Engine.Commands     ] Dispose is waiting for pending direct commands.

[relliv]

try this when app closing

mediaElement.Dispose();

[namcigar]

Thank you, I tried that too but it's still the same. As you can see in this log messages:

[11:04.968 | DBG | Engine.Commands     ] Dispose Entered. Waiting for Command Manager processor to stop.
[11:04.968 | DBG | Engine.Commands     ] Dispose is waiting for pending direct commands.
[11:04.968 | DBG | Engine.Commands     ] Dispose is closing media.
[11:04.985 | INF | Container           ] OnStreamReadInterrupt was requested an immediate read exit.

The form is hanged again.

[namcigar]

Any ideas?

[relliv]

I think it is a kind of bug. Bu I have solution (actually ignore). Download source code go to this method and remove all contents, then add return 0; You will not get any more interrupt exceptions. But if you are not using net core app but you can probably get the following error #496.

[namcigar]

Thank you,

I tried another workaround:

Go to this file

Comment out some lines in method OnDisposing() like this:

            // wait for any pending direct commands (unlikely)
            //this.LogDebug(Aspects.EngineCommand, "Dispose is waiting for pending direct commands.");
            //while (IsDirectCommandPending)
            //    Task.Delay(Constants.DefaultTimingPeriod).Wait();

            //this.LogDebug(Aspects.EngineCommand, "Dispose is closing media.");
            try
            {
                // Execute the close media logic directly
                //CommandCloseMedia();
                PostProcessDirectCommand(DirectCommandType.Close, null, false);
            }
            catch (Exception ex)
            {
                this.LogError(Aspects.EngineCommand, "Dispose had issues closing media. This is most likely a bug.", ex);
            }

then it worked!

But I still wondering why so I asked for help from you all.

[relliv]

This package is working fine with local files or hosted (web) files but streaming part isn't good. Stream latency, buffering etc. I think author should fix these parts but he is seems busy.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.