Media Foundation and DirectShow tips, gotchas and code bits
This blog is dedicated to assisting fellow Software Engineers who are integrating Microsoft’s audio and video technologies into their software.
List of Windows 10 (developer preview) UWP Audio, Video, Camera and Graphics samples
[Update: Fixed broken links] Hello again my fellow media development enthusiasts. It is that time...
Date: 05/29/2015
BackgroundMediaPlayer architecture on Windows Phone 8.1
I posted this a while back on the MSDN Windows Phone Development forum. I think that it includes...
Date: 12/25/2014
Capturing raw PCM audio on Windows Phone 8 and 8.1
[This is a copy of the blog post I originally wrote and published on behalf of the WSDS team. The...
Date: 10/03/2014
Achievement Unlocked: MIDI support added to Windows 8.1 apps
[This is a copy of the blog post I originally wrote and published on behalf of the WSDS team. The...
Date: 09/05/2014
Using MediaComposition to add background audio to video (Windows Phone 8.1)
One of our friends on the forum pointed out that we really don’t have any good samples on how...
Date: 06/18/2014
Free Chalk Talk: Light up Your Apps with Sights and Sounds
Hello All, I am giving a live chalk talk on October 16th for interested English speaking engineers....
Date: 10/02/2013
Mixed Media – Audio & Video – Windows Store vs. Windows Phone 8
Please note: This post is "reprinted" from the "Managing Windows Store Developer Solutions" blog...
Date: 03/08/2013
Visual Studio 2012's simulator causes video to stop playback when orientation is changed
Just a quick post to let you know that one of my friends on the forums discovered that if you are...
Date: 08/31/2012
Out of memory errors with the Windows Media Format SDK
Over the last few years I’ve worked with a number of engineers that have reported out of...
Date: 06/07/2010
Why are the Multimedia Timer APIs (timeSetEvent) not as accurate as I would expect?
The Multimedia Timer APIs (MM Timer APIs) get their high accuracy by using the Programmable...
Date: 07/02/2009
Here is a consolidated list of changes that we can expect for DirectShow Windows 7
Potentially Breaking Change (IMPORTANT): Intelligent Connect adds a level of indirection on Win 7...
Date: 05/28/2009
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...
Date: 04/28/2009
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...
Date: 04/07/2009
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...
Date: 04/07/2009
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....
Date: 04/01/2009
Where the heck did Microsoft hide the WM Format SDK x64 libraries for Vista? How about XP?
It looks like the 64 bit version of the Windows Media Format SDK .lib static library files are not...
Date: 03/27/2009
DirectShow Filter vs. DMO - Ready... Fight!
There are some rather interesting misunderstandings surrounding Direct Media Objects (DMO). I talked...
Date: 02/25/2009
Rendering MMS, RTSP and HTTP with DirectShow in Vista and Windows 7
I was talking to a DirectShow engineer the other day that was having issues rendering URLs using...
Date: 02/05/2009
“MediaElement.SetSource” throws “AE_INVALID_FORMAT_ERROR” when setting “Stream” sources
When reading a stream from a location such as a media resource object, and then calling...
Date: 01/08/2009
“Leave audio at remote computer” Doesn't Work in Windows Server 2008
When connecting to Windows Server 2008 through remote desktop choosing to leave the audio on the...
Date: 01/08/2009
Hotfix 929182 not updating Windows Media Encoder 9 components as expected on Vista
I was in training a few weeks ago (WMS 2008 new features) and found that no matter what I did I was...
Date: 10/17/2008
Windows Media Player does not negotiate media types for DMO DSP plug-ins on Vista
Here is an interesting issue I ran across writing Windows Media Player (WMP) custom DSP plug-ins....
Date: 10/17/2008
Using the WM Encoder to Protect Existing Content with WM DRM
One of the things that a lot of DRM savvy CDNs are doing is to use WM Encoder to add WM DRM to their...
Date: 10/14/2008
WMRM SDK 10.1.2 best practice sample code
I wrote this sample code a while back to show how to validate the latest individualization version...
Date: 09/26/2008
WM Format SDK DRM returns NS_E_DRM_LICENSE_NOTACQUIRED when license is delivered
I ran into an issue using the WM Format SDK DRM Stub Library the other day. When we were trying to...
Date: 09/04/2008
Windows Media Encoder 9 (SDK) Limitations and Support
There are a few limitations to the supportability of the Windows Media Encoder 9 series application...
Date: 09/04/2008
Unexpected Windows Media Encoder shutdown / crash while encoding
I found an interesting problem when dynamically changing the input format of the WM Encoder while...
Date: 04/11/2008
When playing back a DV encoded AVI file, what does the AVI Splitter do when it detects a zero byte sample (zero byte index) from the Async File Source?
Q. When playing back a DV encoded AVI file, what does the AVI Splitter do when it detects a zero...
Date: 03/25/2008
When NTSC (29.97 interlaced) video is being fed to the VMR9 with a custom allocator/presenter, PresentImage is being called 60 times per second. You expect 30 times per second.
Q. When NTSC (29.97 interlaced) video is being fed to the VMR9 with a custom allocator/presenter,...
Date: 03/25/2008
Adding CRL data to WMRM SDK 10.1.2 based scripts
UPDATE: The code referenced on this page is written in ASP / VB Script. I recently created a...
Date: 03/14/2008
DirectMusic PlaySegmentEx stops working after running for 18 - 20 days
I ran into an interesting issue with DirectMusic yesterday. When you use PlaySegmentEx to repeatedly...
Date: 03/13/2008
Bug in prelicgen.asp may cuse error on the client
I found a bug recently in the prelicgen.asp page that has been causing pain for developers. They...
Date: 03/12/2008