FFmpeg
vf_mcdeint.c
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1 /*
2  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (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
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 /**
22  * @file
23  * Motion Compensation Deinterlacer
24  * Ported from MPlayer libmpcodecs/vf_mcdeint.c.
25  *
26  * Known Issues:
27  *
28  * The motion estimation is somewhat at the mercy of the input, if the
29  * input frames are created purely based on spatial interpolation then
30  * for example a thin black line or another random and not
31  * interpolateable pattern will cause problems.
32  * Note: completely ignoring the "unavailable" lines during motion
33  * estimation did not look any better, so the most obvious solution
34  * would be to improve tfields or penalize problematic motion vectors.
35  *
36  * If non iterative ME is used then snow currently ignores the OBMC
37  * window and as a result sometimes creates artifacts.
38  *
39  * Only past frames are used, we should ideally use future frames too,
40  * something like filtering the whole movie in forward and then
41  * backward direction seems like an interesting idea but the current
42  * filter framework is FAR from supporting such things.
43  *
44  * Combining the motion compensated image with the input image also is
45  * not as trivial as it seems, simple blindly taking even lines from
46  * one and odd ones from the other does not work at all as ME/MC
47  * sometimes has nothing in the previous frames which matches the
48  * current. The current algorithm has been found by trial and error
49  * and almost certainly can be improved...
50  */
51 
52 #include "libavutil/opt.h"
53 #include "libavutil/pixdesc.h"
54 #include "libavcodec/avcodec.h"
55 #include "avfilter.h"
56 #include "formats.h"
57 #include "internal.h"
58 
60  MODE_FAST = 0,
65 };
66 
68  PARITY_TFF = 0, ///< top field first
69  PARITY_BFF = 1, ///< bottom field first
70 };
71 
72 typedef struct MCDeintContext {
73  const AVClass *class;
74  int mode; ///< MCDeintMode
75  int parity; ///< MCDeintParity
76  int qp;
80 
81 #define OFFSET(x) offsetof(MCDeintContext, x)
82 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
83 #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit }
84 
85 static const AVOption mcdeint_options[] = {
86  { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_FAST}, 0, MODE_NB-1, FLAGS, .unit="mode" },
87  CONST("fast", NULL, MODE_FAST, "mode"),
88  CONST("medium", NULL, MODE_MEDIUM, "mode"),
89  CONST("slow", NULL, MODE_SLOW, "mode"),
90  CONST("extra_slow", NULL, MODE_EXTRA_SLOW, "mode"),
91 
92  { "parity", "set the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=PARITY_BFF}, -1, 1, FLAGS, "parity" },
93  CONST("tff", "assume top field first", PARITY_TFF, "parity"),
94  CONST("bff", "assume bottom field first", PARITY_BFF, "parity"),
95 
96  { "qp", "set qp", OFFSET(qp), AV_OPT_TYPE_INT, {.i64=1}, INT_MIN, INT_MAX, FLAGS },
97  { NULL }
98 };
99 
100 AVFILTER_DEFINE_CLASS(mcdeint);
101 
103 {
104  AVFilterContext *ctx = inlink->dst;
105  MCDeintContext *mcdeint = ctx->priv;
106  const AVCodec *enc;
107  AVCodecContext *enc_ctx;
109  int ret;
110 
111  if (!(enc = avcodec_find_encoder(AV_CODEC_ID_SNOW))) {
112  av_log(ctx, AV_LOG_ERROR, "Snow encoder is not enabled in libavcodec\n");
113  return AVERROR(EINVAL);
114  }
115 
116  mcdeint->pkt = av_packet_alloc();
117  if (!mcdeint->pkt)
118  return AVERROR(ENOMEM);
119  mcdeint->enc_ctx = avcodec_alloc_context3(enc);
120  if (!mcdeint->enc_ctx)
121  return AVERROR(ENOMEM);
122  enc_ctx = mcdeint->enc_ctx;
123  enc_ctx->width = inlink->w;
124  enc_ctx->height = inlink->h;
125  enc_ctx->time_base = (AVRational){1,25}; // meaningless
126  enc_ctx->gop_size = INT_MAX;
127  enc_ctx->max_b_frames = 0;
128  enc_ctx->pix_fmt = AV_PIX_FMT_YUV420P;
131  enc_ctx->global_quality = 1;
132  enc_ctx->me_cmp = enc_ctx->me_sub_cmp = FF_CMP_SAD;
133  enc_ctx->mb_cmp = FF_CMP_SSE;
134  av_dict_set(&opts, "memc_only", "1", 0);
135  av_dict_set(&opts, "no_bitstream", "1", 0);
136 
137  switch (mcdeint->mode) {
138  case MODE_EXTRA_SLOW:
139  enc_ctx->refs = 3;
140  case MODE_SLOW:
141  av_dict_set(&opts, "motion_est", "iter", 0);
142  case MODE_MEDIUM:
143  enc_ctx->flags |= AV_CODEC_FLAG_4MV;
144  enc_ctx->dia_size = 2;
145  case MODE_FAST:
146  enc_ctx->flags |= AV_CODEC_FLAG_QPEL;
147  }
148 
149  ret = avcodec_open2(enc_ctx, enc, &opts);
150  av_dict_free(&opts);
151  if (ret < 0)
152  return ret;
153 
154  return 0;
155 }
156 
158 {
159  MCDeintContext *mcdeint = ctx->priv;
160 
161  av_packet_free(&mcdeint->pkt);
162  avcodec_free_context(&mcdeint->enc_ctx);
163 }
164 
166 {
167  static const enum AVPixelFormat pix_fmts[] = {
169  };
171  if (!fmts_list)
172  return AVERROR(ENOMEM);
173  return ff_set_common_formats(ctx, fmts_list);
174 }
175 
177 {
178  MCDeintContext *mcdeint = inlink->dst->priv;
179  AVFilterLink *outlink = inlink->dst->outputs[0];
180  AVFrame *outpic, *frame_dec;
181  AVPacket *pkt = mcdeint->pkt;
182  int x, y, i, ret, got_frame = 0;
183 
184  outpic = ff_get_video_buffer(outlink, outlink->w, outlink->h);
185  if (!outpic) {
187  return AVERROR(ENOMEM);
188  }
189  av_frame_copy_props(outpic, inpic);
190  inpic->quality = mcdeint->qp * FF_QP2LAMBDA;
191 
192  ret = avcodec_encode_video2(mcdeint->enc_ctx, pkt, inpic, &got_frame);
193  if (ret < 0)
194  goto end;
195 
196  frame_dec = mcdeint->enc_ctx->coded_frame;
197 
198  for (i = 0; i < 3; i++) {
199  int is_chroma = !!i;
200  int w = AV_CEIL_RSHIFT(inlink->w, is_chroma);
201  int h = AV_CEIL_RSHIFT(inlink->h, is_chroma);
202  int fils = frame_dec->linesize[i];
203  int srcs = inpic ->linesize[i];
204  int dsts = outpic ->linesize[i];
205 
206  for (y = 0; y < h; y++) {
207  if ((y ^ mcdeint->parity) & 1) {
208  for (x = 0; x < w; x++) {
209  uint8_t *filp = &frame_dec->data[i][x + y*fils];
210  uint8_t *srcp = &inpic ->data[i][x + y*srcs];
211  uint8_t *dstp = &outpic ->data[i][x + y*dsts];
212 
213  if (y > 0 && y < h-1){
214  int is_edge = x < 3 || x > w-4;
215  int diff0 = filp[-fils] - srcp[-srcs];
216  int diff1 = filp[+fils] - srcp[+srcs];
217  int temp = filp[0];
218 
219 #define DELTA(j) av_clip(j, -x, w-1-x)
220 
221 #define GET_SCORE_EDGE(j)\
222  FFABS(srcp[-srcs+DELTA(-1+(j))] - srcp[+srcs+DELTA(-1-(j))])+\
223  FFABS(srcp[-srcs+DELTA(j) ] - srcp[+srcs+DELTA( -(j))])+\
224  FFABS(srcp[-srcs+DELTA(1+(j)) ] - srcp[+srcs+DELTA( 1-(j))])
225 
226 #define GET_SCORE(j)\
227  FFABS(srcp[-srcs-1+(j)] - srcp[+srcs-1-(j)])+\
228  FFABS(srcp[-srcs +(j)] - srcp[+srcs -(j)])+\
229  FFABS(srcp[-srcs+1+(j)] - srcp[+srcs+1-(j)])
230 
231 #define CHECK_EDGE(j)\
232  { int score = GET_SCORE_EDGE(j);\
233  if (score < spatial_score){\
234  spatial_score = score;\
235  diff0 = filp[-fils+DELTA(j)] - srcp[-srcs+DELTA(j)];\
236  diff1 = filp[+fils+DELTA(-(j))] - srcp[+srcs+DELTA(-(j))];\
237 
238 #define CHECK(j)\
239  { int score = GET_SCORE(j);\
240  if (score < spatial_score){\
241  spatial_score= score;\
242  diff0 = filp[-fils+(j)] - srcp[-srcs+(j)];\
243  diff1 = filp[+fils-(j)] - srcp[+srcs-(j)];\
244 
245  if (is_edge) {
246  int spatial_score = GET_SCORE_EDGE(0) - 1;
247  CHECK_EDGE(-1) CHECK_EDGE(-2) }} }}
248  CHECK_EDGE( 1) CHECK_EDGE( 2) }} }}
249  } else {
250  int spatial_score = GET_SCORE(0) - 1;
251  CHECK(-1) CHECK(-2) }} }}
252  CHECK( 1) CHECK( 2) }} }}
253  }
254 
255 
256  if (diff0 + diff1 > 0)
257  temp -= (diff0 + diff1 - FFABS(FFABS(diff0) - FFABS(diff1)) / 2) / 2;
258  else
259  temp -= (diff0 + diff1 + FFABS(FFABS(diff0) - FFABS(diff1)) / 2) / 2;
260  *filp = *dstp = temp > 255U ? ~(temp>>31) : temp;
261  } else {
262  *dstp = *filp;
263  }
264  }
265  }
266  }
267 
268  for (y = 0; y < h; y++) {
269  if (!((y ^ mcdeint->parity) & 1)) {
270  for (x = 0; x < w; x++) {
271  frame_dec->data[i][x + y*fils] =
272  outpic ->data[i][x + y*dsts] = inpic->data[i][x + y*srcs];
273  }
274  }
275  }
276  }
277  mcdeint->parity ^= 1;
278 
279 end:
282  if (ret < 0) {
283  av_frame_free(&outpic);
284  return ret;
285  }
286  return ff_filter_frame(outlink, outpic);
287 }
288 
289 static const AVFilterPad mcdeint_inputs[] = {
290  {
291  .name = "default",
292  .type = AVMEDIA_TYPE_VIDEO,
293  .filter_frame = filter_frame,
294  .config_props = config_props,
295  },
296  { NULL }
297 };
298 
299 static const AVFilterPad mcdeint_outputs[] = {
300  {
301  .name = "default",
302  .type = AVMEDIA_TYPE_VIDEO,
303  },
304  { NULL }
305 };
306 
308  .name = "mcdeint",
309  .description = NULL_IF_CONFIG_SMALL("Apply motion compensating deinterlacing."),
310  .priv_size = sizeof(MCDeintContext),
311  .uninit = uninit,
315  .priv_class = &mcdeint_class,
316 };
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:634
MCDeintContext::parity
int parity
MCDeintParity.
Definition: vf_mcdeint.c:75
AVCodec
AVCodec.
Definition: codec.h:197
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
MCDeintContext::pkt
AVPacket * pkt
Definition: vf_mcdeint.c:77
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
FF_COMPLIANCE_EXPERIMENTAL
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1606
MODE_SLOW
@ MODE_SLOW
Definition: vf_mcdeint.c:62
MODE_NB
@ MODE_NB
Definition: vf_mcdeint.c:64
MODE_MEDIUM
@ MODE_MEDIUM
Definition: vf_mcdeint.c:61
AV_CODEC_FLAG_QSCALE
#define AV_CODEC_FLAG_QSCALE
Use fixed qscale.
Definition: avcodec.h:275
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
MODE_FAST
@ MODE_FAST
Definition: vf_mcdeint.c:60
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:204
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:324
pixdesc.h
w
uint8_t w
Definition: llviddspenc.c:39
AVOption
AVOption.
Definition: opt.h:248
AVDictionary
Definition: dict.c:30
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:149
PARITY_BFF
@ PARITY_BFF
bottom field first
Definition: vf_mcdeint.c:69
AV_CODEC_FLAG_4MV
#define AV_CODEC_FLAG_4MV
4 MV per MB allowed / advanced prediction for H.263.
Definition: avcodec.h:279
AVCodecContext::mb_cmp
int mb_cmp
macroblock comparison function (not supported yet)
Definition: avcodec.h:934
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:75
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:338
ff_filter_frame
return ff_filter_frame(outlink, outpic)
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:65
formats.h
CHECK_EDGE
#define CHECK_EDGE(j)
U
#define U(x)
Definition: vp56_arith.h:37
AVCodecContext::refs
int refs
number of reference frames
Definition: avcodec.h:1124
avcodec_find_encoder
AVCodec * avcodec_find_encoder(enum AVCodecID id)
Find a registered encoder with a matching codec ID.
Definition: allcodecs.c:941
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:616
AV_CODEC_FLAG_LOW_DELAY
#define AV_CODEC_FLAG_LOW_DELAY
Force low delay.
Definition: avcodec.h:325
FF_CMP_SSE
#define FF_CMP_SSE
Definition: avcodec.h:942
mcdeint_options
static const AVOption mcdeint_options[]
Definition: vf_mcdeint.c:85
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
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
else
else
Definition: vf_mcdeint.c:249
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:170
AVCodecContext::global_quality
int global_quality
Global quality for codecs which cannot change it per frame.
Definition: avcodec.h:602
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
MCDeintParity
MCDeintParity
Definition: vf_mcdeint.c:67
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
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
filp
* filp
Definition: vf_mcdeint.c:260
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_mcdeint.c:165
opts
AVDictionary * opts
Definition: movenc.c:50
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:659
inpic
av_frame_free & inpic
Definition: vf_mcdeint.c:281
CHECK
#define CHECK(j)
MCDeintContext
Definition: vf_mcdeint.c:72
avcodec_free_context
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer.
Definition: options.c:185
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
avcodec_open2
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: avcodec.c:142
AVCodecContext::me_cmp
int me_cmp
motion estimation comparison function
Definition: avcodec.h:922
MODE_EXTRA_SLOW
@ MODE_EXTRA_SLOW
Definition: vf_mcdeint.c:63
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avcodec.h:659
AV_CODEC_FLAG_QPEL
#define AV_CODEC_FLAG_QPEL
Use qpel MC.
Definition: avcodec.h:287
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
AVCodecContext::gop_size
int gop_size
the number of pictures in a group of pictures, or 0 for intra_only
Definition: avcodec.h:731
MCDeintMode
MCDeintMode
Definition: vf_mcdeint.c:59
parity
mcdeint parity
Definition: vf_mcdeint.c:277
MCDeintContext::enc_ctx
AVCodecContext * enc_ctx
Definition: vf_mcdeint.c:78
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(mcdeint)
ff_vf_mcdeint
AVFilter ff_vf_mcdeint
Definition: vf_mcdeint.c:307
PARITY_TFF
@ PARITY_TFF
top field first
Definition: vf_mcdeint.c:68
AVCodecContext::me_sub_cmp
int me_sub_cmp
subpixel motion estimation comparison function
Definition: avcodec.h:928
avcodec_encode_video2
attribute_deprecated int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Encode a frame of video.
Definition: encode.c:513
GET_SCORE_EDGE
#define GET_SCORE_EDGE(j)
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:64
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
config_props
static int config_props(AVFilterLink *inlink)
Definition: vf_mcdeint.c:102
FF_CMP_SAD
#define FF_CMP_SAD
Definition: avcodec.h:941
internal.h
OFFSET
#define OFFSET(x)
Definition: vf_mcdeint.c:81
i
int i
Definition: input.c:407
AVCodecContext::dia_size
int dia_size
ME diamond size & shape.
Definition: avcodec.h:964
CONST
#define CONST(name, help, val, unit)
Definition: vf_mcdeint.c:83
uint8_t
uint8_t
Definition: audio_convert.c:194
MCDeintContext::mode
int mode
MCDeintMode.
Definition: vf_mcdeint.c:74
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
AVCodecContext::height
int height
Definition: avcodec.h:709
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
GET_SCORE
#define GET_SCORE(j)
MCDeintContext::qp
int qp
Definition: vf_mcdeint.c:76
avcodec.h
AVFilter
Filter definition.
Definition: avfilter.h:145
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *inpic)
Definition: vf_mcdeint.c:176
FLAGS
#define FLAGS
Definition: vf_mcdeint.c:82
if
if(ret< 0)
Definition: vf_mcdeint.c:282
ret
ret
Definition: filter_design.txt:187
AVCodecContext::strict_std_compliance
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:1601
mcdeint_inputs
static const AVFilterPad mcdeint_inputs[]
Definition: vf_mcdeint.c:289
AVCodecContext::coded_frame
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:1764
AVCodecContext
main external API structure.
Definition: avcodec.h:536
AV_CODEC_ID_SNOW
@ AV_CODEC_ID_SNOW
Definition: codec_id.h:262
mode
mode
Definition: ebur128.h:83
mcdeint_outputs
static const AVFilterPad mcdeint_outputs[]
Definition: vf_mcdeint.c:299
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
temp
else temp
Definition: vf_mcdeint.c:259
AVFilterContext
An instance of a filter.
Definition: avfilter.h:341
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_mcdeint.c:157
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecContext::max_b_frames
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
Definition: avcodec.h:796
AVPacket
This structure stores compressed data.
Definition: packet.h:346
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:70
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:709
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:355
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
h
h
Definition: vp9dsp_template.c:2038
FF_QP2LAMBDA
#define FF_QP2LAMBDA
factor to convert from H.263 QP to lambda
Definition: avutil.h:227