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AVIStreamPrevKeyFrame

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

AVIStreamPrevKeyFrame(
  pavi, 
  lPos  
);

Parameters

pavi

Handle to an open stream.

lPos

Starting position to search in the stream.

Return Values

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

  Windows NT/2000/XP: Included in Windows NT 3.1 and later.
  Windows 95/98/Me: Included in Windows 95 and later.
  Header: Declared in Vfw.h.

See Also

AVIFile Functions and Macros, AVIFile Macros

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