FFmpeg
vf_blackdetect.c
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1 /*
2  * Copyright (c) 2012 Stefano Sabatini
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * Video black detector, loosely based on blackframe with extended
24  * syntax and features
25  */
26 
27 #include <float.h>
28 #include "libavutil/opt.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/timestamp.h"
31 #include "avfilter.h"
32 #include "internal.h"
33 
34 typedef struct BlackDetectContext {
35  const AVClass *class;
36  double black_min_duration_time; ///< minimum duration of detected black, in seconds
37  int64_t black_min_duration; ///< minimum duration of detected black, expressed in timebase units
38  int64_t black_start; ///< pts start time of the first black picture
39  int64_t black_end; ///< pts end time of the last black picture
40  int64_t last_picref_pts; ///< pts of the last input picture
42 
45  unsigned int pixel_black_th_i;
46 
47  unsigned int nb_black_pixels; ///< number of black pixels counted so far
49  int depth;
51  unsigned int *counter;
53 
54 #define OFFSET(x) offsetof(BlackDetectContext, x)
55 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
56 
57 static const AVOption blackdetect_options[] = {
58  { "d", "set minimum detected black duration in seconds", OFFSET(black_min_duration_time), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, DBL_MAX, FLAGS },
59  { "black_min_duration", "set minimum detected black duration in seconds", OFFSET(black_min_duration_time), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, DBL_MAX, FLAGS },
60  { "picture_black_ratio_th", "set the picture black ratio threshold", OFFSET(picture_black_ratio_th), AV_OPT_TYPE_DOUBLE, {.dbl=.98}, 0, 1, FLAGS },
61  { "pic_th", "set the picture black ratio threshold", OFFSET(picture_black_ratio_th), AV_OPT_TYPE_DOUBLE, {.dbl=.98}, 0, 1, FLAGS },
62  { "pixel_black_th", "set the pixel black threshold", OFFSET(pixel_black_th), AV_OPT_TYPE_DOUBLE, {.dbl=.10}, 0, 1, FLAGS },
63  { "pix_th", "set the pixel black threshold", OFFSET(pixel_black_th), AV_OPT_TYPE_DOUBLE, {.dbl=.10}, 0, 1, FLAGS },
64  { NULL }
65 };
66 
67 AVFILTER_DEFINE_CLASS(blackdetect);
68 
69 #define YUVJ_FORMATS \
70  AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P
71 
72 static const enum AVPixelFormat yuvj_formats[] = {
74 };
75 
76 static const enum AVPixelFormat pix_fmts[] = {
97 };
98 
100 {
101  AVFilterContext *ctx = inlink->dst;
102  BlackDetectContext *s = ctx->priv;
104  const int depth = desc->comp[0].depth;
105  const int max = (1 << depth) - 1;
106  const int factor = (1 << (depth - 8));
107 
108  s->depth = depth;
109  s->nb_threads = ff_filter_get_nb_threads(ctx);
110  s->time_base = inlink->time_base;
111  s->black_min_duration = s->black_min_duration_time / av_q2d(s->time_base);
112  s->counter = av_calloc(s->nb_threads, sizeof(*s->counter));
113  if (!s->counter)
114  return AVERROR(ENOMEM);
115 
116  s->pixel_black_th_i = ff_fmt_is_in(inlink->format, yuvj_formats) ?
117  // luminance_minimum_value + pixel_black_th * luminance_range_size
118  s->pixel_black_th * max :
119  16 * factor + s->pixel_black_th * (235 - 16) * factor;
120 
122  "black_min_duration:%s pixel_black_th:%f pixel_black_th_i:%d picture_black_ratio_th:%f\n",
123  av_ts2timestr(s->black_min_duration, &s->time_base),
124  s->pixel_black_th, s->pixel_black_th_i,
125  s->picture_black_ratio_th);
126  return 0;
127 }
128 
130 {
131  BlackDetectContext *s = ctx->priv;
132 
133  if ((s->black_end - s->black_start) >= s->black_min_duration) {
135  "black_start:%s black_end:%s black_duration:%s\n",
136  av_ts2timestr(s->black_start, &s->time_base),
137  av_ts2timestr(s->black_end, &s->time_base),
138  av_ts2timestr(s->black_end - s->black_start, &s->time_base));
139  }
140 }
141 
143  int jobnr, int nb_jobs)
144 {
145  BlackDetectContext *s = ctx->priv;
146  const unsigned int threshold = s->pixel_black_th_i;
147  unsigned int *counterp = &s->counter[jobnr];
148  AVFrame *in = arg;
149  const int linesize = in->linesize[0];
150  const int w = in->width;
151  const int h = in->height;
152  const int start = (h * jobnr) / nb_jobs;
153  const int end = (h * (jobnr+1)) / nb_jobs;
154  const int size = end - start;
155  unsigned int counter = 0;
156 
157  if (s->depth == 8) {
158  const uint8_t *p = in->data[0] + start * linesize;
159 
160  for (int i = 0; i < size; i++) {
161  for (int x = 0; x < w; x++)
162  counter += p[x] <= threshold;
163  p += linesize;
164  }
165  } else {
166  const uint16_t *p = (const uint16_t *)(in->data[0] + start * linesize);
167 
168  for (int i = 0; i < size; i++) {
169  for (int x = 0; x < w; x++)
170  counter += p[x] <= threshold;
171  p += linesize / 2;
172  }
173  }
174 
175  *counterp = counter;
176 
177  return 0;
178 }
179 
181 {
182  AVFilterContext *ctx = inlink->dst;
183  BlackDetectContext *s = ctx->priv;
184  double picture_black_ratio = 0;
185 
187  FFMIN(inlink->h, s->nb_threads));
188 
189  for (int i = 0; i < s->nb_threads; i++)
190  s->nb_black_pixels += s->counter[i];
191 
192  picture_black_ratio = (double)s->nb_black_pixels / (inlink->w * inlink->h);
193 
195  "frame:%"PRId64" picture_black_ratio:%f pts:%s t:%s type:%c\n",
196  inlink->frame_count_out, picture_black_ratio,
197  av_ts2str(picref->pts), av_ts2timestr(picref->pts, &s->time_base),
199 
200  if (picture_black_ratio >= s->picture_black_ratio_th) {
201  if (!s->black_started) {
202  /* black starts here */
203  s->black_started = 1;
204  s->black_start = picref->pts;
205  av_dict_set(&picref->metadata, "lavfi.black_start",
206  av_ts2timestr(s->black_start, &s->time_base), 0);
207  }
208  } else if (s->black_started) {
209  /* black ends here */
210  s->black_started = 0;
211  s->black_end = picref->pts;
213  av_dict_set(&picref->metadata, "lavfi.black_end",
214  av_ts2timestr(s->black_end, &s->time_base), 0);
215  }
216 
217  s->last_picref_pts = picref->pts;
218  s->nb_black_pixels = 0;
219  return ff_filter_frame(inlink->dst->outputs[0], picref);
220 }
221 
223 {
224  BlackDetectContext *s = ctx->priv;
225 
226  av_freep(&s->counter);
227 
228  if (s->black_started) {
229  // FIXME: black_end should be set to last_picref_pts + last_picref_duration
230  s->black_end = s->last_picref_pts;
232  }
233 }
234 
235 static const AVFilterPad blackdetect_inputs[] = {
236  {
237  .name = "default",
238  .type = AVMEDIA_TYPE_VIDEO,
239  .config_props = config_input,
240  .filter_frame = filter_frame,
241  },
242 };
243 
245  {
246  .name = "default",
247  .type = AVMEDIA_TYPE_VIDEO,
248  },
249 };
250 
252  .name = "blackdetect",
253  .description = NULL_IF_CONFIG_SMALL("Detect video intervals that are (almost) black."),
254  .priv_size = sizeof(BlackDetectContext),
258  .uninit = uninit,
259  .priv_class = &blackdetect_class,
261 };
AV_PIX_FMT_YUVA422P16
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:474
BlackDetectContext::time_base
AVRational time_base
Definition: vf_blackdetect.c:48
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
blackdetect_options
static const AVOption blackdetect_options[]
Definition: vf_blackdetect.c:57
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1009
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2858
FILTER_PIXFMTS_ARRAY
#define FILTER_PIXFMTS_ARRAY(array)
Definition: internal.h:170
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
BlackDetectContext::black_end
int64_t black_end
pts end time of the last black picture
Definition: vf_blackdetect.c:39
BlackDetectContext::black_min_duration_time
double black_min_duration_time
minimum duration of detected black, in seconds
Definition: vf_blackdetect.c:36
AV_PIX_FMT_YUVA422P9
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:466
BlackDetectContext::last_picref_pts
int64_t last_picref_pts
pts of the last input picture
Definition: vf_blackdetect.c:40
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
pixdesc.h
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:432
AVFrame::width
int width
Definition: frame.h:397
AV_PIX_FMT_YUVA420P16
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:473
w
uint8_t w
Definition: llviddspenc.c:38
AV_PIX_FMT_YUVA420P10
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:468
AVOption
AVOption.
Definition: opt.h:251
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:431
black_counter
static int black_counter(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_blackdetect.c:142
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
float.h
YUVJ_FORMATS
#define YUVJ_FORMATS
Definition: vf_blackdetect.c:69
AV_PIX_FMT_YUV440P
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
max
#define max(a, b)
Definition: cuda_runtime.h:33
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:175
AV_PIX_FMT_YUVA422P10
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:469
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:346
AV_PIX_FMT_YUVA420P9
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:465
BlackDetectContext::depth
int depth
Definition: vf_blackdetect.c:49
AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:475
AV_PIX_FMT_YUV422P9
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:429
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:415
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:434
av_cold
#define av_cold
Definition: attributes.h:90
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:443
ff_vf_blackdetect
const AVFilter ff_vf_blackdetect
Definition: vf_blackdetect.c:251
blackdetect_inputs
static const AVFilterPad blackdetect_inputs[]
Definition: vf_blackdetect.c:235
s
#define s(width, name)
Definition: cbs_vp9.c:256
AV_PIX_FMT_YUVA420P
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:444
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_blackdetect.c:222
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:227
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_blackdetect.c:99
AV_PIX_FMT_YUVA444P12
#define AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:472
AV_PIX_FMT_YUV420P9
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:428
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:442
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_PIX_FMT_GRAY14
#define AV_PIX_FMT_GRAY14
Definition: pixfmt.h:414
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:190
BlackDetectContext::pixel_black_th
double pixel_black_th
Definition: vf_blackdetect.c:44
arg
const char * arg
Definition: jacosubdec.c:67
AV_PIX_FMT_GRAY10
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:412
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AV_PIX_FMT_YUV440P10
#define AV_PIX_FMT_YUV440P10
Definition: pixfmt.h:433
ff_fmt_is_in
int ff_fmt_is_in(int fmt, const int *fmts)
Tell if an integer is contained in the provided -1-terminated list of integers.
Definition: formats.c:351
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:432
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
yuvj_formats
static enum AVPixelFormat yuvj_formats[]
Definition: vf_blackdetect.c:72
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:422
av_ts2timestr
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:76
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:115
BlackDetectContext::counter
unsigned int * counter
Definition: vf_blackdetect.c:51
AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:436
size
int size
Definition: twinvq_data.h:10344
BlackDetectContext::black_started
int black_started
Definition: vf_blackdetect.c:41
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:438
BlackDetectContext::black_start
int64_t black_start
pts start time of the first black picture
Definition: vf_blackdetect.c:38
AV_PIX_FMT_YUVA444P
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:167
AV_PIX_FMT_YUVA444P10
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:470
FLAGS
#define FLAGS
Definition: vf_blackdetect.c:55
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
internal.h
av_get_picture_type_char
char av_get_picture_type_char(enum AVPictureType pict_type)
Return a single letter to describe the given picture type pict_type.
Definition: utils.c:40
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:793
BlackDetectContext
Definition: vf_blackdetect.c:34
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
check_black_end
static void check_black_end(AVFilterContext *ctx)
Definition: vf_blackdetect.c:129
AV_PIX_FMT_NV21
@ AV_PIX_FMT_NV21
as above, but U and V bytes are swapped
Definition: pixfmt.h:90
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:55
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:272
AV_PIX_FMT_YUV444P9
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:430
BlackDetectContext::nb_threads
int nb_threads
Definition: vf_blackdetect.c:50
AVFilter
Filter definition.
Definition: avfilter.h:171
BlackDetectContext::picture_black_ratio_th
double picture_black_ratio_th
Definition: vf_blackdetect.c:43
BlackDetectContext::black_min_duration
int64_t black_min_duration
minimum duration of detected black, expressed in timebase units
Definition: vf_blackdetect.c:37
AV_PIX_FMT_NV12
@ AV_PIX_FMT_NV12
planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (firs...
Definition: pixfmt.h:89
AV_PIX_FMT_YUVA444P9
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:467
BlackDetectContext::pixel_black_th_i
unsigned int pixel_black_th_i
Definition: vf_blackdetect.c:45
blackdetect_outputs
static const AVFilterPad blackdetect_outputs[]
Definition: vf_blackdetect.c:244
AV_PIX_FMT_YUV420P12
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:435
AV_PIX_FMT_YUV422P14
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:440
AVFrame::height
int height
Definition: frame.h:397
BlackDetectContext::nb_black_pixels
unsigned int nb_black_pixels
number of black pixels counted so far
Definition: vf_blackdetect.c:47
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_PIX_FMT_YUVA422P12
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:471
avfilter.h
AVFrame::metadata
AVDictionary * metadata
metadata.
Definition: frame.h:625
AVFILTER_FLAG_METADATA_ONLY
#define AVFILTER_FLAG_METADATA_ONLY
The filter is a "metadata" filter - it does not modify the frame data in any way.
Definition: avfilter.h:143
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: vf_blackdetect.c:76
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
AVFilterContext
An instance of a filter.
Definition: avfilter.h:408
factor
static const int factor[16]
Definition: vf_pp7.c:76
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
Definition: vf_blackdetect.c:180
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:127
desc
const char * desc
Definition: libsvtav1.c:83
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(blackdetect)
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:191
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
av_dict_set
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:71
AV_PIX_FMT_YUV411P
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
timestamp.h
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:370
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
av_ts2str
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
AV_PIX_FMT_YUV440P12
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:437
h
h
Definition: vp9dsp_template.c:2038
AV_PIX_FMT_YUV444P14
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:441
AV_PIX_FMT_GRAY12
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:413
ff_filter_execute
static av_always_inline int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: internal.h:142
OFFSET
#define OFFSET(x)
Definition: vf_blackdetect.c:54
AV_PIX_FMT_YUVA422P
@ AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:166
AV_PIX_FMT_YUV420P14
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:439