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AVIStreamPrevKeyFrame macro

The AVIStreamPrevKeyFrame macro locates the key frame that precedes a specified position in a stream.

Syntax


LONG AVIStreamPrevKeyFrame(
   pavi,
   lPos
);

Parameters

pavi

Handle to an open stream.

lPos

Starting position to search in the stream.

Return value

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, lPos) \ 
    AVIStreamFindSample(pavi, lPos - 1, FIND_PREV | FIND_KEY) 


Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Vfw.h

See also

AVIFile Functions and Macros
AVIFile Macros

 

 

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