IAMAnalogVideoDecoder::put_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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 put_VCRHorizontalLocking method specifies whether the video is a tape source or a broadcast source.
Syntax
HRESULT put_VCRHorizontalLocking(
[in] long lVCRHorizontalLocking
);
Parameters
[in] lVCRHorizontalLocking
Specifies one of the following values.
| Value | Description |
|---|---|
| 0 | The video is from a broadcast source. |
| 1 | The video is 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. Setting the value to 1 tells the decoder to relax its standards, which leads to a better chance of maintaining sync.
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 |