IAMAnalogVideoDecoder::get_VCRHorizontalLocking method (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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 get_VCRHorizontalLocking method indicates whether the decoder is expecting video from a tape source or a broadcast source.
Syntax
HRESULT get_VCRHorizontalLocking(
[out] long *plVCRHorizontalLocking
);
Parameters
[out] plVCRHorizontalLocking
Pointer to a variable that receives one of the following values.
| Value | Description |
|---|---|
| 0 | The decoder is expecting video from a broadcast source. |
| 1 | The decoder is expecting video from a tape source. |
Return value
Returns an HRESULT value. Possible values include the following.
| Return code | Description |
|---|---|
|
The device does not support this method. |
|
Success. |
Remarks
The timing accuracy of synchronization pulses is typically poorer from a tape source than from a broadcast source. If the returned value is 1, the decoder might relax its sync timing standards.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |