GStreamer-sharp signals and events
Ralph
ralph.gucwa at racelogic.co.uk
Wed Nov 30 05:18:18 PST 2011
I'm developing a C# WPF application using OSSBuild and gstreamersharp.
I have a problem listening to signals generated by playbin2.
This is what I do:
In the constructor:
Gst.BasePlugins.PlayBin2 playBin = new Gst.BasePlugins.PlayBin2();
playBin.AboutToFinish += OnAboutToFinish;
Somewhere else:
private void OnAboutToFinish(object o, Gst.GLib.SignalArgs args)
{
//supply the next file
playBin.Uri = nextFileName;
}
The problem is that even if OnAboutToFinish method contains no code, the
program crashes, simply executing this method in response to the event
causes the application to crash.
I found that in other languages (Python, for example) the event handler
always returns TRUE. Unfortunately setting args.RetVal to true causes the
following exception:
Object reference not set to an instance of an object.
at Gst.GLib.Value.set_Val(Object value)
at Gst.DynamicSignal.OnMarshal(IntPtr closure, Value& retval, UInt32
argc, IntPtr argsPtr, IntPtr ihint, IntPtr data)
The same problem occurs if instead of using the .NET AboutToFinish event of
playbin2, I connect to about-to-finish signal using Connect method:
playBin.Connect("about-to-finish", OnAboutToFinish);
How should I handle playbin2 events?
--
View this message in context: http://gstreamer-devel.966125.n4.nabble.com/GStreamer-sharp-signals-and-events-tp4122933p4122933.html
Sent from the GStreamer-devel mailing list archive at Nabble.com.
More information about the gstreamer-devel
mailing list