img2.c
Go to the documentation of this file.
1 /*
2  * Image format
3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4  * Copyright (c) 2004 Michael Niedermayer
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/log.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/pixdesc.h"
28 #include "libavutil/parseutils.h"
29 #include "avformat.h"
30 #include "avio_internal.h"
31 #include "internal.h"
32 
33 typedef struct {
34  const AVClass *class;
35  int img_first;
36  int img_last;
38  int img_count;
39  int is_pipe;
40  char path[1024];
41  char *pixel_format;
42  char *video_size;
43  char *framerate;
44  int loop;
45 } VideoData;
46 
47 typedef struct {
48  enum CodecID id;
49  const char *str;
50 } IdStrMap;
51 
52 static const IdStrMap img_tags[] = {
53  { CODEC_ID_MJPEG , "jpeg"},
54  { CODEC_ID_MJPEG , "jpg"},
55  { CODEC_ID_LJPEG , "ljpg"},
56  { CODEC_ID_PNG , "png"},
57  { CODEC_ID_PNG , "mng"},
58  { CODEC_ID_PPM , "ppm"},
59  { CODEC_ID_PPM , "pnm"},
60  { CODEC_ID_PGM , "pgm"},
61  { CODEC_ID_PGMYUV , "pgmyuv"},
62  { CODEC_ID_PBM , "pbm"},
63  { CODEC_ID_PAM , "pam"},
64  { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
65  { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
66  { CODEC_ID_MPEG4 , "mpg4-img"},
67  { CODEC_ID_FFV1 , "ffv1-img"},
68  { CODEC_ID_RAWVIDEO , "y"},
69  { CODEC_ID_BMP , "bmp"},
70  { CODEC_ID_GIF , "gif"},
71  { CODEC_ID_TARGA , "tga"},
72  { CODEC_ID_TIFF , "tiff"},
73  { CODEC_ID_TIFF , "tif"},
74  { CODEC_ID_SGI , "sgi"},
75  { CODEC_ID_PTX , "ptx"},
76  { CODEC_ID_PCX , "pcx"},
77  { CODEC_ID_SUNRAST , "sun"},
78  { CODEC_ID_SUNRAST , "ras"},
79  { CODEC_ID_SUNRAST , "rs"},
80  { CODEC_ID_SUNRAST , "im1"},
81  { CODEC_ID_SUNRAST , "im8"},
82  { CODEC_ID_SUNRAST , "im24"},
83  { CODEC_ID_SUNRAST , "sunras"},
84  { CODEC_ID_JPEG2000 , "jp2"},
85  { CODEC_ID_JPEG2000 , "jpc"},
86  { CODEC_ID_DPX , "dpx"},
87  { CODEC_ID_PICTOR , "pic"},
88  { CODEC_ID_NONE , NULL}
89 };
90 
91 static const int sizes[][2] = {
92  { 640, 480 },
93  { 720, 480 },
94  { 720, 576 },
95  { 352, 288 },
96  { 352, 240 },
97  { 160, 128 },
98  { 512, 384 },
99  { 640, 352 },
100  { 640, 240 },
101 };
102 
103 static int infer_size(int *width_ptr, int *height_ptr, int size)
104 {
105  int i;
106 
107  for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
108  if ((sizes[i][0] * sizes[i][1]) == size) {
109  *width_ptr = sizes[i][0];
110  *height_ptr = sizes[i][1];
111  return 0;
112  }
113  }
114  return -1;
115 }
116 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
117 {
118  str= strrchr(str, '.');
119  if(!str) return CODEC_ID_NONE;
120  str++;
121 
122  while (tags->id) {
123  if (!av_strcasecmp(str, tags->str))
124  return tags->id;
125 
126  tags++;
127  }
128  return CODEC_ID_NONE;
129 }
130 
131 /* return -1 if no image found */
132 static int find_image_range(int *pfirst_index, int *plast_index,
133  const char *path)
134 {
135  char buf[1024];
136  int range, last_index, range1, first_index;
137 
138  /* find the first image */
139  for(first_index = 0; first_index < 5; first_index++) {
140  if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
141  *pfirst_index =
142  *plast_index = 1;
143  if (avio_check(buf, AVIO_FLAG_READ) > 0)
144  return 0;
145  return -1;
146  }
147  if (avio_check(buf, AVIO_FLAG_READ) > 0)
148  break;
149  }
150  if (first_index == 5)
151  goto fail;
152 
153  /* find the last image */
154  last_index = first_index;
155  for(;;) {
156  range = 0;
157  for(;;) {
158  if (!range)
159  range1 = 1;
160  else
161  range1 = 2 * range;
162  if (av_get_frame_filename(buf, sizeof(buf), path,
163  last_index + range1) < 0)
164  goto fail;
165  if (avio_check(buf, AVIO_FLAG_READ) <= 0)
166  break;
167  range = range1;
168  /* just in case... */
169  if (range >= (1 << 30))
170  goto fail;
171  }
172  /* we are sure than image last_index + range exists */
173  if (!range)
174  break;
175  last_index += range;
176  }
177  *pfirst_index = first_index;
178  *plast_index = last_index;
179  return 0;
180  fail:
181  return -1;
182 }
183 
184 
185 static int read_probe(AVProbeData *p)
186 {
187  if (p->filename && av_str2id(img_tags, p->filename)) {
189  return AVPROBE_SCORE_MAX;
190  else
191  return AVPROBE_SCORE_MAX/2;
192  }
193  return 0;
194 }
195 
196 enum CodecID ff_guess_image2_codec(const char *filename)
197 {
198  return av_str2id(img_tags, filename);
199 }
200 
201 #if FF_API_GUESS_IMG2_CODEC
202 enum CodecID av_guess_image2_codec(const char *filename){
203  return av_str2id(img_tags, filename);
204 }
205 #endif
206 
208 {
209  VideoData *s = s1->priv_data;
210  int first_index, last_index, ret = 0;
211  int width = 0, height = 0;
212  AVStream *st;
214  AVRational framerate;
215 
217 
218  st = avformat_new_stream(s1, NULL);
219  if (!st) {
220  return AVERROR(ENOMEM);
221  }
222 
223  if (s->pixel_format && (pix_fmt = av_get_pix_fmt(s->pixel_format)) == PIX_FMT_NONE) {
224  av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n", s->pixel_format);
225  return AVERROR(EINVAL);
226  }
227  if (s->video_size && (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
228  av_log(s, AV_LOG_ERROR, "Could not parse video size: %s.\n", s->video_size);
229  return ret;
230  }
231  if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
232  av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s->framerate);
233  return ret;
234  }
235 
236 #if FF_API_LOOP_INPUT
237  if (s1->loop_input)
238  s->loop = s1->loop_input;
239 #endif
240 
241  av_strlcpy(s->path, s1->filename, sizeof(s->path));
242  s->img_number = 0;
243  s->img_count = 0;
244 
245  /* find format */
246  if (s1->iformat->flags & AVFMT_NOFILE)
247  s->is_pipe = 0;
248  else{
249  s->is_pipe = 1;
251  }
252 
253  avpriv_set_pts_info(st, 60, framerate.den, framerate.num);
254 
255  if (width && height) {
256  st->codec->width = width;
257  st->codec->height = height;
258  }
259 
260  if (!s->is_pipe) {
261  if (find_image_range(&first_index, &last_index, s->path) < 0)
262  return AVERROR(ENOENT);
263  s->img_first = first_index;
264  s->img_last = last_index;
265  s->img_number = first_index;
266  /* compute duration */
267  st->start_time = 0;
268  st->duration = last_index - first_index + 1;
269  }
270 
271  if(s1->video_codec_id){
273  st->codec->codec_id = s1->video_codec_id;
274  }else if(s1->audio_codec_id){
276  st->codec->codec_id = s1->audio_codec_id;
277  }else{
279  st->codec->codec_id = av_str2id(img_tags, s->path);
280  }
281  if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pix_fmt != PIX_FMT_NONE)
282  st->codec->pix_fmt = pix_fmt;
283 
284  return 0;
285 }
286 
288 {
289  VideoData *s = s1->priv_data;
290  char filename[1024];
291  int i;
292  int size[3]={0}, ret[3]={0};
293  AVIOContext *f[3];
294  AVCodecContext *codec= s1->streams[0]->codec;
295 
296  if (!s->is_pipe) {
297  /* loop over input */
298  if (s->loop && s->img_number > s->img_last) {
299  s->img_number = s->img_first;
300  }
301  if (s->img_number > s->img_last)
302  return AVERROR_EOF;
303  if (av_get_frame_filename(filename, sizeof(filename),
304  s->path, s->img_number)<0 && s->img_number > 1)
305  return AVERROR(EIO);
306  for(i=0; i<3; i++){
307  if (avio_open2(&f[i], filename, AVIO_FLAG_READ,
308  &s1->interrupt_callback, NULL) < 0) {
309  if(i==1)
310  break;
311  av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename);
312  return AVERROR(EIO);
313  }
314  size[i]= avio_size(f[i]);
315 
316  if(codec->codec_id != CODEC_ID_RAWVIDEO)
317  break;
318  filename[ strlen(filename) - 1 ]= 'U' + i;
319  }
320 
321  if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
322  infer_size(&codec->width, &codec->height, size[0]);
323  } else {
324  f[0] = s1->pb;
325  if (f[0]->eof_reached)
326  return AVERROR(EIO);
327  size[0]= 4096;
328  }
329 
330  av_new_packet(pkt, size[0] + size[1] + size[2]);
331  pkt->stream_index = 0;
332  pkt->flags |= AV_PKT_FLAG_KEY;
333 
334  pkt->size= 0;
335  for(i=0; i<3; i++){
336  if(size[i]){
337  ret[i]= avio_read(f[i], pkt->data + pkt->size, size[i]);
338  if (!s->is_pipe)
339  avio_close(f[i]);
340  if(ret[i]>0)
341  pkt->size += ret[i];
342  }
343  }
344 
345  if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
346  av_free_packet(pkt);
347  return AVERROR(EIO); /* signal EOF */
348  } else {
349  s->img_count++;
350  s->img_number++;
351  return 0;
352  }
353 }
354 
355 #if CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER
356 /******************************************************/
357 /* image output */
358 
359 static int write_header(AVFormatContext *s)
360 {
361  VideoData *img = s->priv_data;
362 
363  img->img_number = 1;
364  av_strlcpy(img->path, s->filename, sizeof(img->path));
365 
366  /* find format */
367  if (s->oformat->flags & AVFMT_NOFILE)
368  img->is_pipe = 0;
369  else
370  img->is_pipe = 1;
371 
372  return 0;
373 }
374 
375 static int write_packet(AVFormatContext *s, AVPacket *pkt)
376 {
377  VideoData *img = s->priv_data;
378  AVIOContext *pb[3];
379  char filename[1024];
380  AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
381  int i;
382 
383  if (!img->is_pipe) {
384  if (av_get_frame_filename(filename, sizeof(filename),
385  img->path, img->img_number) < 0 && img->img_number>1) {
386  av_log(s, AV_LOG_ERROR,
387  "Could not get frame filename number %d from pattern '%s'\n",
388  img->img_number, img->path);
389  return AVERROR(EIO);
390  }
391  for(i=0; i<3; i++){
392  if (avio_open2(&pb[i], filename, AVIO_FLAG_WRITE,
393  &s->interrupt_callback, NULL) < 0) {
394  av_log(s, AV_LOG_ERROR, "Could not open file : %s\n",filename);
395  return AVERROR(EIO);
396  }
397 
398  if(codec->codec_id != CODEC_ID_RAWVIDEO)
399  break;
400  filename[ strlen(filename) - 1 ]= 'U' + i;
401  }
402  } else {
403  pb[0] = s->pb;
404  }
405 
406  if(codec->codec_id == CODEC_ID_RAWVIDEO){
407  int ysize = codec->width * codec->height;
408  avio_write(pb[0], pkt->data , ysize);
409  avio_write(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
410  avio_write(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
411  avio_flush(pb[1]);
412  avio_flush(pb[2]);
413  avio_close(pb[1]);
414  avio_close(pb[2]);
415  }else{
416  if(av_str2id(img_tags, s->filename) == CODEC_ID_JPEG2000){
417  AVStream *st = s->streams[0];
418  if(st->codec->extradata_size > 8 &&
419  AV_RL32(st->codec->extradata+4) == MKTAG('j','p','2','h')){
420  if(pkt->size < 8 || AV_RL32(pkt->data+4) != MKTAG('j','p','2','c'))
421  goto error;
422  avio_wb32(pb[0], 12);
423  ffio_wfourcc(pb[0], "jP ");
424  avio_wb32(pb[0], 0x0D0A870A); // signature
425  avio_wb32(pb[0], 20);
426  ffio_wfourcc(pb[0], "ftyp");
427  ffio_wfourcc(pb[0], "jp2 ");
428  avio_wb32(pb[0], 0);
429  ffio_wfourcc(pb[0], "jp2 ");
430  avio_write(pb[0], st->codec->extradata, st->codec->extradata_size);
431  }else if(pkt->size < 8 ||
432  (!st->codec->extradata_size &&
433  AV_RL32(pkt->data+4) != MKTAG('j','P',' ',' '))){ // signature
434  error:
435  av_log(s, AV_LOG_ERROR, "malformed JPEG 2000 codestream\n");
436  return -1;
437  }
438  }
439  avio_write(pb[0], pkt->data, pkt->size);
440  }
441  avio_flush(pb[0]);
442  if (!img->is_pipe) {
443  avio_close(pb[0]);
444  }
445 
446  img->img_number++;
447  return 0;
448 }
449 
450 #endif /* CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER */
451 
452 #define OFFSET(x) offsetof(VideoData, x)
453 #define DEC AV_OPT_FLAG_DECODING_PARAM
454 static const AVOption options[] = {
455  { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
456  { "video_size", "", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
457  { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
458  { "loop", "", OFFSET(loop), AV_OPT_TYPE_INT, {.dbl = 0}, 0, 1, DEC },
459  { NULL },
460 };
461 
462 /* input */
463 #if CONFIG_IMAGE2_DEMUXER
464 static const AVClass img2_class = {
465  .class_name = "image2 demuxer",
466  .item_name = av_default_item_name,
467  .option = options,
468  .version = LIBAVUTIL_VERSION_INT,
469 };
470 AVInputFormat ff_image2_demuxer = {
471  .name = "image2",
472  .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
473  .priv_data_size = sizeof(VideoData),
477  .flags = AVFMT_NOFILE,
478  .priv_class = &img2_class,
479 };
480 #endif
481 #if CONFIG_IMAGE2PIPE_DEMUXER
482 static const AVClass img2pipe_class = {
483  .class_name = "image2pipe demuxer",
484  .item_name = av_default_item_name,
485  .option = options,
486  .version = LIBAVUTIL_VERSION_INT,
487 };
488 AVInputFormat ff_image2pipe_demuxer = {
489  .name = "image2pipe",
490  .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
491  .priv_data_size = sizeof(VideoData),
494  .priv_class = &img2pipe_class,
495 };
496 #endif
497 
498 /* output */
499 #if CONFIG_IMAGE2_MUXER
500 AVOutputFormat ff_image2_muxer = {
501  .name = "image2",
502  .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
503  .extensions = "bmp,dpx,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
504  "ppm,sgi,tga,tif,tiff,jp2",
505  .priv_data_size = sizeof(VideoData),
506  .video_codec = CODEC_ID_MJPEG,
510 };
511 #endif
512 #if CONFIG_IMAGE2PIPE_MUXER
513 AVOutputFormat ff_image2pipe_muxer = {
514  .name = "image2pipe",
515  .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
516  .priv_data_size = sizeof(VideoData),
517  .video_codec = CODEC_ID_MJPEG,
521 };
522 #endif
static int write_header(AVFormatContext *s)
Definition: assenc.c:28
enum PixelFormat pix_fmt
Pixel format, see PIX_FMT_xxx.
Definition: avcodec.h:1426
Bytestream IO Context.
Definition: avio.h:68
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:281
int size
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
Definition: parseutils.c:123
int img_last
Definition: img2.c:36
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1127
AVOption.
Definition: opt.h:244
int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
Parse str and put in width_ptr and height_ptr the detected values.
Definition: parseutils.c:95
Definition: img2.c:47
const char * filename
Definition: avformat.h:340
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the pts for a given stream.
Definition: utils.c:3828
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:60
static int write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: assenc.c:58
enum PixelFormat pix_fmt
Definition: v4l.c:65
static const IdStrMap img_tags[]
Definition: img2.c:52
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:909
AVOptions.
#define AVIO_FLAG_READ
read-only
Definition: avio.h:565
int width
Definition: rotozoom.c:164
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:566
#define FF_ARRAY_ELEMS(a)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:954
int ctx_flags
Format-specific flags, see AVFMTCTX_xx.
Definition: avformat.h:919
enum CodecID video_codec_id
Forced video codec_id.
Definition: avformat.h:1031
static int infer_size(int *width_ptr, int *height_ptr, int size)
Definition: img2.c:103
Format I/O context.
Definition: avformat.h:863
int avio_check(const char *url, int flags)
Return AVIO_FLAG_* access flags corresponding to the access permissions of the resource in url...
Definition: avio.c:407
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:38
int flags
can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_RAWPICTURE, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS
Definition: avformat.h:414
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:844
int flags
Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_SHOW_IDS, AVFMT_GENERIC_INDEX, AVFMT_TS_DISCONT, AVFMT_NOBINSEARCH, AVFMT_NOGENSEARCH, AVFMT_NO_BYTE_SEEK.
Definition: avformat.h:530
enum AVStreamParseType need_parsing
Definition: avformat.h:815
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1387
AVStream ** streams
Definition: avformat.h:908
int img_number
Definition: img2.c:37
uint8_t * data
Definition: avcodec.h:908
static int flags
Definition: log.c:34
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:151
#define AVERROR_EOF
End of file.
Definition: error.h:51
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:190
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:50
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:652
struct AVOutputFormat * oformat
Definition: avformat.h:877
char * video_size
String describing video size, set by a private option.
Definition: bktr.c:59
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:88
enum CodecID id
Definition: img2.c:48
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:191
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
Definition: aviobuf.c:987
AV_RL32
Definition: bytestream.h:89
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:140
AVStream * avformat_new_stream(AVFormatContext *s, AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2776
Definition: bktr.c:52
static int read_header(AVFormatContext *s1, AVFormatParameters *ap)
Definition: img2.c:207
static int read_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: img2.c:287
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:64
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:914
AVCodecContext * codec
codec context
Definition: avformat.h:623
int void avio_flush(AVIOContext *s)
Definition: aviobuf.c:205
char filename[1024]
input or output filename
Definition: avformat.h:910
const char * str
Definition: img2.c:49
char * framerate
Set by a private option.
Definition: bktr.c:60
#define f(n)
Definition: regs.h:33
int av_strcasecmp(const char *a, const char *b)
Definition: avstring.c:137
int width
picture width / height.
Definition: avcodec.h:1408
int loop
Definition: img2.c:44
enum CodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:196
const char * name
Definition: avformat.h:390
static int read_probe(AVProbeData *p)
Definition: img2.c:185
#define OFFSET(x)
Definition: img2.c:452
LIBAVUTIL_VERSION_INT
Definition: eval.c:50
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Return in 'buf' the path with 'd' replaced by a number.
Definition: utils.c:3563
Stream structure.
Definition: avformat.h:620
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:375
enum CodecID audio_codec_id
Forced audio codec_id.
Definition: avformat.h:1037
NULL
Definition: eval.c:50
enum AVMediaType codec_type
Definition: avcodec.h:1574
AVIOContext * pb
Definition: avformat.h:896
av_default_item_name
Definition: dnxhdenc.c:43
main external API structure.
Definition: avcodec.h:1329
int av_filename_number_test(const char *filename)
Check whether filename actually is a numbered sequence generator.
Definition: utils.c:303
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:111
int extradata_size
Definition: avcodec.h:1388
static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
Definition: img2.c:116
Describe the class of an AVClass context structure.
Definition: log.h:33
rational number numerator/denominator
Definition: rational.h:43
int img_first
Definition: img2.c:35
int avio_open2(AVIOContext **s, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create and initialize a AVIOContext for accessing the resource indicated by url.
Definition: aviobuf.c:970
#define DEC
Definition: img2.c:453
enum CodecID id
Definition: mxfenc.c:85
#define s1
Definition: regdef.h:38
This structure contains the data a format has to probe a file.
Definition: avformat.h:339
static const AVOption options[]
Definition: img2.c:454
misc parsing utilities
int height
Definition: gxfenc.c:73
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:684
static int loop
Definition: avplay.c:259
#define AVPROBE_SCORE_MAX
maximum score, half of that is used for file-extension-based detection
Definition: avformat.h:345
int is_pipe
Definition: img2.c:39
full parsing and repack
Definition: avformat.h:581
PixelFormat
Pixel format.
Definition: pixfmt.h:62
Main libavformat public API header.
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:368
int64_t start_time
Decoding: pts of the first frame of the stream, in stream time base.
Definition: avformat.h:677
char * pixel_format
Set by a private option.
Definition: img2.c:41
int den
denominator
Definition: rational.h:45
struct AVInputFormat * iformat
Can only be iformat or oformat, not both at the same time.
Definition: avformat.h:876
CodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:83
static int64_t video_size
Definition: avconv.c:132
void * priv_data
Format private data.
Definition: avformat.h:883
#define AVFMT_NODIMENSIONS
Format does not need width/height.
Definition: avformat.h:379
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:324
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:460
static const int sizes[][2]
Definition: img2.c:91
int stream_index
Definition: avcodec.h:910
char path[1024]
Definition: img2.c:40
#define MKTAG(a, b, c, d)
Definition: common.h:231
int img_count
Definition: img2.c:38
static int find_image_range(int *pfirst_index, int *plast_index, const char *path)
Definition: img2.c:132
enum PixelFormat av_get_pix_fmt(const char *name)
Return the pixel format corresponding to name.
Definition: pixdesc.c:1116
enum CodecID codec_id
Definition: avcodec.h:1575