vf_thumbnail.c File Reference

Potential thumbnail lookup filter to reduce the risk of an inappropriate selection (such as a black frame) we could get with an absolute seek. More...

#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"

Classes
struct	thumb_frame
struct	ThumbContext

Macros
#define	HIST_SIZE   (3*256)
#define	OFFSET(x)   offsetof(ThumbContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Typedefs
typedef struct ThumbContext	ThumbContext

Functions
	AVFILTER_DEFINE_CLASS (thumbnail)

Variables
AVFilter	ff_vf_thumbnail

Detailed Description

Potential thumbnail lookup filter to reduce the risk of an inappropriate selection (such as a black frame) we could get with an absolute seek.

Simplified version of algorithm by Vadim Zaliva lord@.nosp@m.croc.nosp@m.odile.nosp@m..org.

See also

http://notbrainsurgery.livejournal.com/29773.html

Variable Documentation

ff_vf_thumbnail

AVFilter ff_vf_thumbnail

Initial value:

= {
    .name          = "thumbnail",
    .description   = NULL_IF_CONFIG_SMALL("Select the most representative frame in a given sequence of consecutive frames."),
    .priv_size     = sizeof(ThumbContext),
    .init          = init,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = thumbnail_inputs,
    .outputs       = thumbnail_outputs,
    .priv_class    = &thumbnail_class,
}