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vf_blackframe.c File Reference

Search for black frames to detect scene transitions. More...

#include <stdio.h>
#include <inttypes.h>
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures

struct  BlackFrameContext


#define SET_META(key, format, value)
#define OFFSET(x)   offsetof(BlackFrameContext, x)


static int query_formats (AVFilterContext *ctx)
static int filter_frame (AVFilterLink *inlink, AVFrame *frame)


static const AVOption blackframe_options []
static const AVFilterPad avfilter_vf_blackframe_inputs []
static const AVFilterPad avfilter_vf_blackframe_outputs []
AVFilter ff_vf_blackframe

Detailed Description

Search for black frames to detect scene transitions.

Ported from MPlayer libmpcodecs/vf_blackframe.c.

Definition in file vf_blackframe.c.

Macro Definition Documentation

#define SET_META (   key,
snprintf(buf, sizeof(buf), format, value); \
av_dict_set(metadata, key, buf, 0)
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
void * buf
Definition: avisynth_c.h:690
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
static const char * format
Definition: movenc.c:47
#define snprintf
Definition: snprintf.h:34

Definition at line 63 of file vf_blackframe.c.

Referenced by filter_frame().

#define OFFSET (   x)    offsetof(BlackFrameContext, x)

Definition at line 104 of file vf_blackframe.c.

Definition at line 105 of file vf_blackframe.c.

Function Documentation

static int query_formats ( AVFilterContext ctx)

Definition at line 49 of file vf_blackframe.c.

static int filter_frame ( AVFilterLink inlink,
AVFrame frame 

Definition at line 67 of file vf_blackframe.c.


Variable Documentation

const AVOption blackframe_options[]
Initial value:
= {
{ "amount", "percentage of the pixels that have to be below the threshold "
"for the frame to be considered black", OFFSET(bamount), AV_OPT_TYPE_INT, { .i64 = 98 }, 0, 100, FLAGS },
{ "threshold", "threshold below which a pixel value is considered black",
OFFSET(bthresh), AV_OPT_TYPE_INT, { .i64 = 32 }, 0, 255, FLAGS },
{ "thresh", "threshold below which a pixel value is considered black",
OFFSET(bthresh), AV_OPT_TYPE_INT, { .i64 = 32 }, 0, 255, FLAGS },
{ NULL }
#define NULL
Definition: coverity.c:32
#define FLAGS
#define OFFSET(x)

Definition at line 106 of file vf_blackframe.c.

const AVFilterPad avfilter_vf_blackframe_inputs[]
Initial value:
= {
.name = "default",
.filter_frame = filter_frame,
{ NULL }
#define NULL
Definition: coverity.c:32
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_blackframe.c:67

Definition at line 118 of file vf_blackframe.c.

const AVFilterPad avfilter_vf_blackframe_outputs[]
Initial value:
= {
.name = "default",
{ NULL }
#define NULL
Definition: coverity.c:32

Definition at line 127 of file vf_blackframe.c.

AVFilter ff_vf_blackframe
Initial value:
= {
.name = "blackframe",
.description = NULL_IF_CONFIG_SMALL("Detect frames that are (almost) black."),
.priv_size = sizeof(BlackFrameContext),
.priv_class = &blackframe_class,
static const AVFilterPad avfilter_vf_blackframe_inputs[]
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
static const AVFilterPad avfilter_vf_blackframe_outputs[]
static int query_formats(AVFilterContext *ctx)
Definition: vf_blackframe.c:49

Definition at line 135 of file vf_blackframe.c.