![]() ![]() If there is an associated UWP device app, the app is connected to the MFT0 on the capture pin, so the MFT0 obtains the control messages from the app (that is, the user). The result is that the saved file or the user's chat buddy will see the same video effects that the user sees in their preview, and that there is only one instance of the camera control feature. ![]() In this case, both camera control and video effects work as designed because the preview and stills are tee'd from the capture pin after camera control and video effects are applied. This diagram represents the way a one-pin webcam works: Historically, cameras have been exposed to Windows as a single capture pin. Two popular functions for MFT0 are:Īnalyzing the video stream to provide feedback to the camera for improved capture (such as host-based auto focus and auto exposure) Typical scenarios for MFT0 may present challenges. This diagram shows this architecture, with three copies of the IHV Plug-in MFT, one for each stream. This means that there may be three instances of MFT0. For some system OEMs, the AVStream capture driver must support a preview pin, a capture pin, and a still pin. A separate instance of MFT0 is attached to every pin on the capture source. The driver MFT is also referred to as MFT0 to indicate that it's the first MFT to operate in the source reader. For more info about creating a driver MFT, see Creating a camera driver MFT. This topic covers some points to consider when developing a camera driver MFT on a multi-pin camera. These multi-pin cameras pose unique challenges to developers. ![]() Some cameras provide separate pins for preview, capture, and stills. Once installed, these driver MFTs can be used by UWP device apps to enable special video effects. Windows 8.1 offers IHVs and system OEMs the ability to create video processing plug-ins in the form of a Media Foundation Transform (MFT), known as the camera driver MFT. ![]()
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