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April 2009 - Posts

Tuesday, April 28, 2009 5:33 PM

Activating an audio endpoint when not connected causes the device to report incorrect capabilities

The other day we had a major OEM report an issue with the WASAPI. In particular when they found that when they called “IAudioEndpointVolume::QueryHardwareSupport” it would occasionally return unexpected results for USB web cam devices. Most of the time
Posted by MediaSDKStuff | 1 Comments
Tuesday, April 07, 2009 6:41 PM

Exception playing .mp3 & .wma files using embedded WMP from .hta files

We recently had an engineer report a strange exception when displaying .hta files via mshta.exe. If you embed the Windows Media Player OCX control (WMP) in a web page and then start playback of a file, you will get an exception like the following: Windows
Posted by MediaSDKStuff | 1 Comments
Tuesday, April 07, 2009 5:25 PM

Playing an MPEG1 file in WMP via HTTP returns the wrong duration

A colleague of mine in Japan recently found this very interesting issue in Windows Media Player (WMP) on Windows XP. From what he found WMP returns the wrong duration value when playing back MPEG1 files via HTTP. This only appears to occur if the file
Posted by MediaSDKStuff | 1 Comments
Wednesday, April 01, 2009 5:37 PM

Calling the Format SDK, DirectShow, Media Foundation or the WASAPI from managed code (C#, VB.net)

I get this series of questions from different developers from around the world at least once a week. Q. I want to use DirectShow (Windows Media Format SDK, WASAPIs) from my C# (VB.net, managed) code. Why doesn’t Microsoft have a COM interop library that
Posted by MediaSDKStuff | 1 Comments
 
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