IAMExtendedSeeking::get_ExSeekCapabilities method (qnetwork.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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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_ExSeekCapabilities method retrieves the extended seeking capabilities of the filter.
Syntax
HRESULT get_ExSeekCapabilities(
[out] long *pExCapabilities
);
Parameters
[out] pExCapabilities
Pointer to a variable that receives a bitwise OR of AMExtendedSeekingCapabilities flags.
Return value
If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.
Remarks
The Windows Media Source filter sets the extended seeking flags as follows.
| Flag | Condition |
| AM_EXSEEK_BUFFERING | Always. |
| AM_EXSEEK_NOSTANDARDREPAINT | Always. |
| AM_EXSEEK_SENDS_VIDEOFRAMEREADY | If the video pin has been created. |
| AM_EXSEEK_CANSCAN, AM_EXSEEK_SCANWITHOUTCLOCK | If the stream supports rates other than 1.0. |
| AM_EXSEEK_CANSEEK | If the stream has been authored to be seekable. |
| AM_EXSEEK_MARKERSEEK | If the stream contains markers. |
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 | qnetwork.h |