tags:

views:

50

answers:

1
Q: 

MediaElement/MediaPlayer/MediaUriElement hangs UI thread while loading a video

hey, i've got a wpf application that have a doubleanimation used for scrolling text and images (scrollbar) from the left side of the screen, to the right, and a movie playing, in the same window.

everytime a video ends, and a new video loads, the doubleanimation get stuck/hangs for a second, then it continues normally. i assume it's the control blocking the ui thread while loading the video. i've tried to create a seperate UI thread for the scrolling bar but i didn't solve the problem. i've tried using MediaElement, MediaPlayer and MediaUriElement control with no success.

any help would be appreciated.

A: 

That's a known issue with MediaElement. You pretty much have to preload your videos...which means block the UI thread no, or later ;).

You can also try my MediaUriElement in my WPF MediaKit project. I did as much as possible off thread so this wouldn't happen.

http://wpfmediakit.codeplex.com

Jeremiah Morrill  2010-09-24 22:17:18
hey, thanks for the comment! as the title says, i tried MediaUriElement but got the same result, am i doing something wrong? i'm just setting the "source" property. should i use it differently?
Dimor  2010-09-24 22:57:18
Sorry didn't see that in the title! Anyways the only thing I do on the UI thread is start another thread and invalidate the D3DImage on a new frame. Everything is done asynchronously between the UI thread and DirectShow. Is your computer pretty beefy in terms of CPU? You can try changing the thread priority in Threading\WorkDispatcherObject.cs to something low, but not sure that will fix it.
Jeremiah Morrill  2010-09-24 23:24:15
well, after another test it looks like it does work good with MediaUriElement. thanks alot! :)
Dimor  2010-09-24 23:45:47

related questions

Displaying Flash content in a C# WinForms application
How to get the value of built, encoded ViewState?
Unhandled Exception Handler in .NET 1.1
How do I connect to a database and loop over a recordset in C#?
How do I most elegantly express left join with aggregate SQL as LINQ query
Get a new object instance from a Type in C#
.NET Testing Framework Advice
Automatically update version number
What is the difference between an int and an Integer in Java/C#?
How to write to Web.Config in Medium Trust ?
WinForms ComboBox data binding gotcha
How do you sort a C# dictionary by value?
Adding Scripting functionality to .NET applications
Floating Point Number parsing: Is there a Catch All algorithm?
How do I print an HTML document from a web service?
Decoding T-SQL CAST in C#/VB.net
Anatomy of a "Memory Leak"
How do I get a distinct, ordered list of names from a DataTable using Linq
Reliable Timer in a Console Application
How do I fill a DataSet or a DataTable from a LINQ query resultset ?
What's the difference between Math.Floor() and Math.Truncate() in .NET?
How do I calculate relative time?
How do I calculate someone's age in C#?
Are there any conversion tools for porting Visual J# code to C#?
When setting a form's opacity should I use a decimal or double?