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fame_init(3)			   fame_init			  fame_init(3)

NAME
       fame_init - initialize the fame library

SYNOPSIS
       #include	<fame.h>

       fame_context_t *	fame_init(fame_context_t *context, fame_parameters_t *parameters, unsigned char	*buffer, unsigned int size);
       );

DESCRIPTION
       The fame_init() call is used to open and	initialize the fame library.

       context is the context handle previously	returned by fame_open

       parameters is a fame_parameters_t structure as specified	in fame.h:

       typedef struct _fame_parameters_	{
	 int width;			   /* width of the video sequence */
	 int height;			   /* height of	the video sequence */
	 char const *coding;		   /* coding sequence */
	 int quality;			   /* video quality */
	 int slices_per_frame;		   /* number of	slices per frame */
	 unsigned int frames_per_sequence; /* number of	frames per sequence */
	 int frame_rate_num;		   /* numerator	of frames per second */
	 int frame_rate_den;		   /* denominator of frames per	second */
	 unsigned int shape_quality;	   /* binary shape quality */
	 unsigned int search_range;	   /* motion estimation	search range */
	 unsigned char verbose;		   /* verbosity	*/
       } fame_parameters_t;

       width and height	specify	the size of each frames	of the video sequence.
       Both must be multiple of	16.   width  and  height  must	be  less  than
       4096x4096

       coding is a string of I,	P or B characters representing the sequence of
       frames the encoder must produce.	I frames are intra-coded frames	(simi-
       lar  to	JPEG),	whereas	 P and B frames	are motion compressed, respec-
       tively predicted	from past reference (I or P) frame, or bidirectionally
       predicted from past and future reference	frame.

       quality is a percentage,	which controls compression versus quality.

       slices_per_frame	 is  the number	of frame slices	per frame. More	slices
       provide better error recovery. There must be at	least  one  slice  per
       frame, and at most height / 16

       frames_per_sequence  is	the  maximum  number  of frames	contained in a
       video sequence.

       frame_rate_num/frame_rate_den specify the number	of frames  per	second
       for playback.

       shape_quality is	percentage determing the average binary	shape accuracy
       in video	with arbitrary shape.

       search_range specifies the motion  estimation  search  range  in	 pixel
       unit.  Small  search  ranges work best with slow	motion videos, whereas
       larger search ranges are	rather for fast	motion videos.

       verbose when set	to 1 outputs information on  copyright,	 modules  used
       and current frame on standard error.

       buffer  is the buffer where encoded data	will be	written	to. It must be
       large enough to contain a few frames.

       size specifies the length of the	buffer.

RETURN VALUE
       fame_init return	a new context, or NULL if an error occurred.

BUGS
       buffer must be large enough to contain encoded data. There is no	check-
       ing  of buffer overflow as this would be	too slow.  Encoding of B frame
       is not yet supported.

SEE ALSO
       fame_encode_frame(3), fame_close(3)

libfame				 July 29, 2001			  fame_init(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | BUGS | SEE ALSO

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