IMSVidPlayback::get_Length
| Microsoft DirectShow 9.0 |
IMSVidPlayback::get_Length
This topic applies to Windows XP or later.
The get_Length method retrieves the length of the playback source.
Syntax
HRESULT get_Length( long* lLength );
Parameters
lLength
[out] Pointer to a variable that receives the length. The units for the returned value are determined by the current position mode.
| Position Mode | Returned Value |
| FrameMode | Frame number |
| TenthsSecondsMode | Hundredths of seconds |
To set the position mode, call IMSVidPlayback::put_PositionMode.
Return Values
The method returns an HRESULT. Possible values include the following.
| Value | Description |
| E_NOINTERFACE | The source does not support getting the length. |
| E_POINTER | NULL pointer argument. |
| ERROR_INVALID_STATE | The graph is not built. Call the Build or View method on the Video Control. |
| S_OK | The method succeeded. |
- Note The value ERROR_INVALID_STATE is converted to an HRESULT with the HRESULT_FROM_WIN32 macro.
Remarks
Call the IMSVidCtl::Build or IMSVidCtl::View method before calling this method.
Requirements
Header: Dshow.h.
Library: Quartz.dll.
See Also