Media Element gets Exception from HRESULT: 0x8898050C when trying to change SpeedRatio

08-25-2008 4:12 PM |

Hi,

I'm using VS 2008, no service pack, and Silverlight 1.0 in a WPF application and a MediaElement with images simulating buttons.

When a video is being downloaded from a web server (http://... or mms://...) if I try to modify the Position property or the SpeedRatio property I receive the Exception from HRESULT: 0x8898050C.  However, until this afternoon, only one video did not behave this way.  It worked fine (from the same web server).  Then today, as I was browsing this forum and and also debugging, setting a breakpoint on a running video (xxx_MediaFailed event) after about 13 minutes into the video (of around 50 minutes total) the problem went away.  Now if I play that video it works fine (FF and Rewind).  This leads me to believe that there is a certain point in the buffering or downloading process at which the system can then handle Position modifications or SpeedRatio modifications.  I don't know if that is indicative of the video being buffered onto my hard drive or if there is some other explanation.

So the ultimate questions are, "Is there a property that will let me know when it is okay to attempt Position or SpeedRatio modifications, possibly boolean, or a percentage of the buffering process completed so that I can conditionally allow those actions?" and "Can I change the buffering characteristics so that I can start using those actions sooner?".

Thanks,

Re: Media Element gets Exception from HRESULT: 0x8898050C when trying to change SpeedRatio

08-27-2008 7:06 AM |

Sorry.  I didn't realize the MediaElement was different in Silverlight and WPF.  Doesn't that make code less portable?  I'm assuming that if the media is playing that the MediaOpened event has fired, but I guess it's bad to assume.  I will look into what you said and also consult the WPF forum.

Thanks,