IAMAnalogVideoDecoder::get_NumberOfLines 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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_NumberOfLInes method retrieves the number of scan lines in the video signal.
Syntax
HRESULT get_NumberOfLines(
[out] long *plNumberOfLines
);
Parameters
[out] plNumberOfLines
Pointer to a variable that receives the number of scan lines in the video signal. This is generally by 525 lines for NTSC and 625 lines for PAL or SECAM.
Return value
Returns an HRESULT value. Possible values include the following.
| Return code | Description |
|---|---|
|
The device does not support this method. |
|
Success. |
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 |