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The AVIStreamPrevKeyFrame macro locates the key frame that precedes a specified position in a stream.
Syntax
LONG AVIStreamPrevKeyFrame(
pavi,
l
);
Parameters
pavi
Handle to an open stream.
l
Starting position to search in the stream.
Return value
Type: LONG
Returns the position of the key frame if successful or –1 otherwise.
Remarks
The search performed by this macro does not include the frame at the specified position.
The AVIStreamPrevKeyFrame macro is defined as follows:
#define AVIStreamPrevKeyFrame(pavi, l) \
AVIStreamFindSample(pavi, l - 1, FIND_PREV | FIND_KEY)
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 |