Anteckning
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The AVIStreamPrevKeyFrameTime macro returns the time of the previous key frame in the stream, starting at a given time.
Syntax
LONG AVIStreamPrevKeyFrameTime(
pavi,
t
);
Parameters
pavi
Handle to an open stream.
t
Position in the stream to begin searching.
Return value
Type: LONG
Returns the time if successful or –1 otherwise.
Remarks
The search performed by this macro includes the frame that corresponds to the specified time.
The AVIStreamPrevKeyFrameTime macro is defined as follows:
#define AVIStreamPrevKeyFrameTime(pavi, t) \
AVIStreamSampleToTime(pavi, AVIStreamPrevKeyFrame(pavi,
AVIStreamTimeToSample(pavi, t)))
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 | vfw.h |