IVMRAspectRatioControl interface (strmif.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The IVMRAspectRatioControl interface controls whether the Video Mixing Renderer Filter 7 (VMR-7) preserves the aspect ratio of the source video. This interface is available when the VMR-7 is operating in either windowed or windowless modes. In windowless mode, the same functionality is provided by the IVMRWindowlessControl interface.
Inheritance
The IVMRAspectRatioControl interface inherits from the IUnknown interface. IVMRAspectRatioControl also has these types of members:
Methods
The IVMRAspectRatioControl interface has these methods.
| IVMRAspectRatioControl::GetAspectRatioMode The GetAspectRatioMode method queries whether the VMR will preserve the aspect ratio of the source video. (IVMRAspectRatioControl.GetAspectRatioMode) |
| IVMRAspectRatioControl::SetAspectRatioMode The SetAspectRatioMode method specifies whether the VMR will preserve the aspect ratio of the source video. (IVMRAspectRatioControl.SetAspectRatioMode) |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP with SP1 [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |