FFmpeg
vf_vidstabdetect.c
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1 /*
2  * Copyright (c) 2013 Georg Martius <georg dot martius at web dot de>
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 #define DEFAULT_RESULT_NAME "transforms.trf"
22 
23 #include <vid.stab/libvidstab.h>
24 
25 #include "libavutil/common.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/imgutils.h"
28 #include "avfilter.h"
29 #include "internal.h"
30 
31 #include "vidstabutils.h"
32 
33 typedef struct StabData {
34  const AVClass *class;
35 
36  VSMotionDetect md;
37  VSMotionDetectConfig conf;
38 
39  char *result;
40  FILE *f;
41 } StabData;
42 
43 
44 #define OFFSET(x) offsetof(StabData, x)
45 #define OFFSETC(x) (offsetof(StabData, conf)+offsetof(VSMotionDetectConfig, x))
46 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
47 
48 static const AVOption vidstabdetect_options[] = {
49  {"result", "path to the file used to write the transforms", OFFSET(result), AV_OPT_TYPE_STRING, {.str = DEFAULT_RESULT_NAME}, .flags = FLAGS},
50  {"shakiness", "how shaky is the video and how quick is the camera?"
51  " 1: little (fast) 10: very strong/quick (slow)", OFFSETC(shakiness), AV_OPT_TYPE_INT, {.i64 = 5}, 1, 10, FLAGS},
52  {"accuracy", "(>=shakiness) 1: low 15: high (slow)", OFFSETC(accuracy), AV_OPT_TYPE_INT, {.i64 = 15}, 1, 15, FLAGS},
53  {"stepsize", "region around minimum is scanned with 1 pixel resolution", OFFSETC(stepSize), AV_OPT_TYPE_INT, {.i64 = 6}, 1, 32, FLAGS},
54  {"mincontrast", "below this contrast a field is discarded (0-1)", OFFSETC(contrastThreshold), AV_OPT_TYPE_DOUBLE, {.dbl = 0.25}, 0.0, 1.0, FLAGS},
55  {"show", "0: draw nothing; 1,2: show fields and transforms", OFFSETC(show), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 2, FLAGS},
56  {"tripod", "virtual tripod mode (if >0): motion is compared to a reference"
57  " reference frame (frame # is the value)", OFFSETC(virtualTripod), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS},
58  {NULL}
59 };
60 
61 AVFILTER_DEFINE_CLASS(vidstabdetect);
62 
64 {
65  StabData *s = ctx->priv;
66  ff_vs_init();
67  s->class = &vidstabdetect_class;
68  av_log(ctx, AV_LOG_VERBOSE, "vidstabdetect filter: init %s\n", LIBVIDSTAB_VERSION);
69  return 0;
70 }
71 
73 {
74  StabData *s = ctx->priv;
75  VSMotionDetect *md = &(s->md);
76 
77  if (s->f) {
78  fclose(s->f);
79  s->f = NULL;
80  }
81 
82  vsMotionDetectionCleanup(md);
83 }
84 
86 {
87  // If you add something here also add it in vidstabutils.c
88  static const enum AVPixelFormat pix_fmts[] = {
94  };
95 
97  if (!fmts_list)
98  return AVERROR(ENOMEM);
99  return ff_set_common_formats(ctx, fmts_list);
100 }
101 
103 {
104  AVFilterContext *ctx = inlink->dst;
105  StabData *s = ctx->priv;
106 
107  VSMotionDetect* md = &(s->md);
108  VSFrameInfo fi;
110  int is_planar = desc->flags & AV_PIX_FMT_FLAG_PLANAR;
111 
112  vsFrameInfoInit(&fi, inlink->w, inlink->h,
113  ff_av2vs_pixfmt(ctx, inlink->format));
114  if (!is_planar && fi.bytesPerPixel != av_get_bits_per_pixel(desc)/8) {
115  av_log(ctx, AV_LOG_ERROR, "pixel-format error: wrong bits/per/pixel, please report a BUG");
116  return AVERROR(EINVAL);
117  }
118  if (fi.log2ChromaW != desc->log2_chroma_w) {
119  av_log(ctx, AV_LOG_ERROR, "pixel-format error: log2_chroma_w, please report a BUG");
120  return AVERROR(EINVAL);
121  }
122 
123  if (fi.log2ChromaH != desc->log2_chroma_h) {
124  av_log(ctx, AV_LOG_ERROR, "pixel-format error: log2_chroma_h, please report a BUG");
125  return AVERROR(EINVAL);
126  }
127 
128  // set values that are not initialized by the options
129  s->conf.algo = 1;
130  s->conf.modName = "vidstabdetect";
131  if (vsMotionDetectInit(md, &s->conf, &fi) != VS_OK) {
132  av_log(ctx, AV_LOG_ERROR, "initialization of Motion Detection failed, please report a BUG");
133  return AVERROR(EINVAL);
134  }
135 
136  vsMotionDetectGetConfig(&s->conf, md);
137  av_log(ctx, AV_LOG_INFO, "Video stabilization settings (pass 1/2):\n");
138  av_log(ctx, AV_LOG_INFO, " shakiness = %d\n", s->conf.shakiness);
139  av_log(ctx, AV_LOG_INFO, " accuracy = %d\n", s->conf.accuracy);
140  av_log(ctx, AV_LOG_INFO, " stepsize = %d\n", s->conf.stepSize);
141  av_log(ctx, AV_LOG_INFO, " mincontrast = %f\n", s->conf.contrastThreshold);
142  av_log(ctx, AV_LOG_INFO, " tripod = %d\n", s->conf.virtualTripod);
143  av_log(ctx, AV_LOG_INFO, " show = %d\n", s->conf.show);
144  av_log(ctx, AV_LOG_INFO, " result = %s\n", s->result);
145 
146  s->f = fopen(s->result, "w");
147  if (s->f == NULL) {
148  av_log(ctx, AV_LOG_ERROR, "cannot open transform file %s\n", s->result);
149  return AVERROR(EINVAL);
150  } else {
151  if (vsPrepareFile(md, s->f) != VS_OK) {
152  av_log(ctx, AV_LOG_ERROR, "cannot write to transform file %s\n", s->result);
153  return AVERROR(EINVAL);
154  }
155  }
156  return 0;
157 }
158 
160 {
161  AVFilterContext *ctx = inlink->dst;
162  StabData *s = ctx->priv;
163  VSMotionDetect *md = &(s->md);
164  LocalMotions localmotions;
165 
166  AVFilterLink *outlink = inlink->dst->outputs[0];
167  VSFrame frame;
168  int plane;
169 
170  if (s->conf.show > 0 && !av_frame_is_writable(in))
172 
173  for (plane = 0; plane < md->fi.planes; plane++) {
174  frame.data[plane] = in->data[plane];
175  frame.linesize[plane] = in->linesize[plane];
176  }
177  if (vsMotionDetection(md, &localmotions, &frame) != VS_OK) {
178  av_log(ctx, AV_LOG_ERROR, "motion detection failed");
179  return AVERROR(AVERROR_EXTERNAL);
180  } else {
181  if (vsWriteToFile(md, s->f, &localmotions) != VS_OK) {
182  int ret = AVERROR(errno);
183  av_log(ctx, AV_LOG_ERROR, "cannot write to transform file");
184  return ret;
185  }
186  vs_vector_del(&localmotions);
187  }
188 
189  return ff_filter_frame(outlink, in);
190 }
191 
193  {
194  .name = "default",
195  .type = AVMEDIA_TYPE_VIDEO,
196  .filter_frame = filter_frame,
197  .config_props = config_input,
198  },
199  { NULL }
200 };
201 
203  {
204  .name = "default",
205  .type = AVMEDIA_TYPE_VIDEO,
206  },
207  { NULL }
208 };
209 
211  .name = "vidstabdetect",
212  .description = NULL_IF_CONFIG_SMALL("Extract relative transformations, "
213  "pass 1 of 2 for stabilization "
214  "(see vidstabtransform for pass 2)."),
215  .priv_size = sizeof(StabData),
216  .init = init,
217  .uninit = uninit,
221  .priv_class = &vidstabdetect_class,
222 };
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
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
vidstabutils.h
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1094
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
FLAGS
#define FLAGS
Definition: vf_vidstabdetect.c:46
DEFAULT_RESULT_NAME
#define DEFAULT_RESULT_NAME
Definition: vf_vidstabdetect.c:21
StabData::md
VSMotionDetect md
Definition: vf_vidstabdetect.c:36
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
md
#define md
Definition: vf_colormatrix.c:103
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:324
av_frame_make_writable
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
Definition: frame.c:612
AVOption
AVOption.
Definition: opt.h:248
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
AV_PIX_FMT_BGR24
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
av_get_bits_per_pixel
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:2525
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
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_vidstabdetect.c:159
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:149
avfilter_vf_vidstabdetect_outputs
static const AVFilterPad avfilter_vf_vidstabdetect_outputs[]
Definition: vf_vidstabdetect.c:202
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:65
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
StabData::f
FILE * f
Definition: vf_vidstabdetect.c:40
av_cold
#define av_cold
Definition: attributes.h:90
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
ff_set_common_formats
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:587
s
#define s(width, name)
Definition: cbs_vp9.c:257
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
ff_av2vs_pixfmt
VSPixelFormat ff_av2vs_pixfmt(AVFilterContext *ctx, enum AVPixelFormat pf)
convert AV's pixelformat to vid.stab pixelformat
Definition: vidstabutils.c:24
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:227
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:303
ctx
AVFormatContext * ctx
Definition: movenc.c:48
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
OFFSETC
#define OFFSETC(x)
Definition: vf_vidstabdetect.c:45
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_vidstabdetect.c:63
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
result
and forward the result(frame or status change) to the corresponding input. If nothing is possible
NULL
#define NULL
Definition: coverity.c:32
avfilter_vf_vidstabdetect_inputs
static const AVFilterPad avfilter_vf_vidstabdetect_inputs[]
Definition: vf_vidstabdetect.c:192
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
StabData::conf
VSMotionDetectConfig conf
Definition: vf_vidstabdetect.c:37
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
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:117
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:595
AVERROR_EXTERNAL
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:57
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_vidstabdetect.c:102
vidstabdetect_options
static const AVOption vidstabdetect_options[]
Definition: vf_vidstabdetect.c:48
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:205
internal.h
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Definition: audio_convert.c:326
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_vidstabdetect.c:72
common.h
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
AVFilter
Filter definition.
Definition: avfilter.h:145
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(vidstabdetect)
ret
ret
Definition: filter_design.txt:187
ff_vs_init
void ff_vs_init(void)
sets the memory allocation function and logging constants to av versions
Definition: vidstabutils.c:69
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
OFFSET
#define OFFSET(x)
Definition: vf_vidstabdetect.c:44
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_vidstabdetect.c:85
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
AV_PIX_FMT_FLAG_PLANAR
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:144
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:341
ff_vf_vidstabdetect
AVFilter ff_vf_vidstabdetect
Definition: vf_vidstabdetect.c:210
desc
const char * desc
Definition: libsvtav1.c:79
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:81
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
imgutils.h
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:28
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
StabData
Definition: vf_vidstabdetect.c:33
StabData::result
char * result
Definition: vf_vidstabdetect.c:39