vf_framestep.c File Reference

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

Go to the source code of this file.

Data Structures
struct	FrameStepContext

Macros
#define	OFFSET(x)   offsetof(FrameStepContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Functions
	AVFILTER_DEFINE_CLASS (framestep)
static int	config_output_props (AVFilterLink *outlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *ref)

Variables
static const AVOption	framestep_options []
static const AVFilterPad	framestep_inputs []
static const AVFilterPad	framestep_outputs []
AVFilter	avfilter_vf_framestep

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(FrameStepContext, x)

Definition at line 36 of file vf_framestep.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 37 of file vf_framestep.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

framestep

)

static int config_output_props ( AVFilterLink *  outlink )

static

Definition at line 46 of file vf_framestep.c.

static int filter_frame ( AVFilterLink *  inlink, AVFrame *  ref  )

static

Definition at line 63 of file vf_framestep.c.

Variable Documentation

const AVOption framestep_options[]

static

Initial value:

= {
    { "step", "set frame step",  OFFSET(frame_step), AV_OPT_TYPE_INT, {.i64=1}, 1, INT_MAX, FLAGS},
    {NULL},
}

Definition at line 39 of file vf_framestep.c.

const AVFilterPad framestep_inputs[]

static

Initial value:

= {
    {
        .name             = "default",
        .type             = AVMEDIA_TYPE_VIDEO,
        .filter_frame     = filter_frame,
    },
    { NULL }
}

Definition at line 75 of file vf_framestep.c.

const AVFilterPad framestep_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .config_props  = config_output_props,
    },
    { NULL }
}

Definition at line 84 of file vf_framestep.c.

AVFilter avfilter_vf_framestep

Initial value:

= {
    .name        = "framestep",
    .description = NULL_IF_CONFIG_SMALL("Select one frame every N frames."),
    .priv_size   = sizeof(FrameStepContext),
    .priv_class  = &framestep_class,
    .inputs      = framestep_inputs,
    .outputs     = framestep_outputs,
    .flags       = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}

Definition at line 93 of file vf_framestep.c.