tools/qt-faststart.c

   1 /*
   2  * qt-faststart.c, v0.2
   3  * by Mike Melanson (melanson@pcisys.net)
   4  * This file is placed in the public domain. Use the program however you
   5  * see fit.
   6  *
   7  * This utility rearranges a Quicktime file such that the moov atom
   8  * is in front of the data, thus facilitating network streaming.
   9  *
  10  * To compile this program, start from the base directory from which you
  11  * are building FFmpeg and type:
  12  *  make tools/qt-faststart
  13  * The qt-faststart program will be built in the tools/ directory. If you
  14  * do not build the program in this manner, correct results are not
  15  * guaranteed, particularly on 64-bit platforms.
  16  * Invoke the program with:
  17  *  qt-faststart <infile.mov> <outfile.mov>
  18  *
  19  * Notes: Quicktime files can come in many configurations of top-level
  20  * atoms. This utility stipulates that the very last atom in the file needs
  21  * to be a moov atom. When given such a file, this utility will rearrange
  22  * the top-level atoms by shifting the moov atom from the back of the file
  23  * to the front, and patch the chunk offsets along the way. This utility
  24  * presently only operates on uncompressed moov atoms.
  25  */
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <inttypes.h>
  30 #include <string.h>
  31 #include <limits.h>
  32
  33 #ifdef __MINGW32__
  34 #undef fseeko
  35 #define fseeko(x, y, z) fseeko64(x, y, z)
  36 #undef ftello
  37 #define ftello(x)       ftello64(x)
  38 #elif defined(_WIN32)
  39 #undef fseeko
  40 #define fseeko(x, y, z) _fseeki64(x, y, z)
  41 #undef ftello
  42 #define ftello(x)       _ftelli64(x)
  43 #endif
  44
  45 #define MIN(a,b) ((a) > (b) ? (b) : (a))
  46
  47 #define BE_32(x) (((uint32_t)(((uint8_t*)(x))[0]) << 24) |  \
  48                              (((uint8_t*)(x))[1]  << 16) |  \
  49                              (((uint8_t*)(x))[2]  <<  8) |  \
  50                               ((uint8_t*)(x))[3])
  51
  52 #define BE_64(x) (((uint64_t)(((uint8_t*)(x))[0]) << 56) |  \
  53                   ((uint64_t)(((uint8_t*)(x))[1]) << 48) |  \
  54                   ((uint64_t)(((uint8_t*)(x))[2]) << 40) |  \
  55                   ((uint64_t)(((uint8_t*)(x))[3]) << 32) |  \
  56                   ((uint64_t)(((uint8_t*)(x))[4]) << 24) |  \
  57                   ((uint64_t)(((uint8_t*)(x))[5]) << 16) |  \
  58                   ((uint64_t)(((uint8_t*)(x))[6]) <<  8) |  \
  59                   ((uint64_t)( (uint8_t*)(x))[7]))
  60
  61 #define AV_WB32(p, val)    {                    \
  62     ((uint8_t*)(p))[0] = ((val) >> 24) & 0xff;  \
  63     ((uint8_t*)(p))[1] = ((val) >> 16) & 0xff;  \
  64     ((uint8_t*)(p))[2] = ((val) >> 8) & 0xff;   \
  65     ((uint8_t*)(p))[3] = (val) & 0xff;          \
  66     }
  67
  68 #define AV_WB64(p, val)    {                    \
  69     AV_WB32(p, (val) >> 32)                     \
  70     AV_WB32(p + 4, val)                         \
  71     }
  72
  73 #define BE_FOURCC(ch0, ch1, ch2, ch3)           \
  74     ( (uint32_t)(unsigned char)(ch3)        |   \
  75      ((uint32_t)(unsigned char)(ch2) <<  8) |   \
  76      ((uint32_t)(unsigned char)(ch1) << 16) |   \
  77      ((uint32_t)(unsigned char)(ch0) << 24) )
  78
  79 #define QT_ATOM BE_FOURCC
  80 /* top level atoms */
  81 #define FREE_ATOM QT_ATOM('f', 'r', 'e', 'e')
  82 #define JUNK_ATOM QT_ATOM('j', 'u', 'n', 'k')
  83 #define MDAT_ATOM QT_ATOM('m', 'd', 'a', 't')
  84 #define MOOV_ATOM QT_ATOM('m', 'o', 'o', 'v')
  85 #define PNOT_ATOM QT_ATOM('p', 'n', 'o', 't')
  86 #define SKIP_ATOM QT_ATOM('s', 'k', 'i', 'p')
  87 #define WIDE_ATOM QT_ATOM('w', 'i', 'd', 'e')
  88 #define PICT_ATOM QT_ATOM('P', 'I', 'C', 'T')
  89 #define FTYP_ATOM QT_ATOM('f', 't', 'y', 'p')
  90 #define UUID_ATOM QT_ATOM('u', 'u', 'i', 'd')
  91
  92 #define CMOV_ATOM QT_ATOM('c', 'm', 'o', 'v')
  93 #define TRAK_ATOM QT_ATOM('t', 'r', 'a', 'k')
  94 #define MDIA_ATOM QT_ATOM('m', 'd', 'i', 'a')
  95 #define MINF_ATOM QT_ATOM('m', 'i', 'n', 'f')
  96 #define STBL_ATOM QT_ATOM('s', 't', 'b', 'l')
  97 #define STCO_ATOM QT_ATOM('s', 't', 'c', 'o')
  98 #define CO64_ATOM QT_ATOM('c', 'o', '6', '4')
  99
 100 #define ATOM_PREAMBLE_SIZE    8
 101 #define COPY_BUFFER_SIZE   33554432
 102 #define MAX_FTYP_ATOM_SIZE 1048576
 103
 104 typedef struct {
 105     uint32_t type;
 106     uint32_t header_size;
 107     uint64_t size;
 108     unsigned char *data;
 109 } atom_t;
 110
 111 typedef struct {
 112     uint64_t moov_atom_size;
 113     uint64_t stco_offset_count;
 114     uint64_t stco_data_size;
 115     int stco_overflow;
 116     uint32_t depth;
 117 } update_chunk_offsets_context_t;
 118
 119 typedef struct {
 120     unsigned char *dest;
 121     uint64_t original_moov_size;
 122     uint64_t new_moov_size;
 123 } upgrade_stco_context_t;
 124
 125 typedef int (*parse_atoms_callback_t)(void *context, atom_t *atom);
 126
 127 static int parse_atoms(
 128     unsigned char *buf,
 129     uint64_t size,
 130     parse_atoms_callback_t callback,
 131     void *context)
 132 {
 133     unsigned char *pos = buf;
 134     unsigned char *end = pos + size;
 135     atom_t atom;
 136     int ret;
 137
 138     while (end - pos >= ATOM_PREAMBLE_SIZE) {
 139         atom.size = BE_32(pos);
 140         atom.type = BE_32(pos + 4);
 141         pos += ATOM_PREAMBLE_SIZE;
 142         atom.header_size = ATOM_PREAMBLE_SIZE;
 143
 144         switch (atom.size) {
 145         case 1:
 146             if (end - pos < 8) {
 147                 fprintf(stderr, "not enough room for 64 bit atom size\n");
 148                 return -1;
 149             }
 150
 151             atom.size = BE_64(pos);
 152             pos += 8;
 153             atom.header_size = ATOM_PREAMBLE_SIZE + 8;
 154             break;
 155
 156         case 0:
 157             atom.size = ATOM_PREAMBLE_SIZE + end - pos;
 158             break;
 159         }
 160
 161         if (atom.size < atom.header_size) {
 162             fprintf(stderr, "atom size %"PRIu64" too small\n", atom.size);
 163             return -1;
 164         }
 165
 166         atom.size -= atom.header_size;
 167
 168         if (atom.size > end - pos) {
 169             fprintf(stderr, "atom size %"PRIu64" too big\n", atom.size);
 170             return -1;
 171         }
 172
 173         atom.data = pos;
 174         ret = callback(context, &atom);
 175         if (ret < 0) {
 176             return ret;
 177         }
 178
 179         pos += atom.size;
 180     }
 181
 182     return 0;
 183 }
 184
 185 static int update_stco_offsets(update_chunk_offsets_context_t *context, atom_t *atom)
 186 {
 187     uint32_t current_offset;
 188     uint32_t offset_count;
 189     unsigned char *pos;
 190     unsigned char *end;
 191
 192     printf(" patching stco atom...\n");
 193     if (atom->size < 8) {
 194         fprintf(stderr, "stco atom size %"PRIu64" too small\n", atom->size);
 195         return -1;
 196     }
 197
 198     offset_count = BE_32(atom->data + 4);
 199     if (offset_count > (atom->size - 8) / 4) {
 200         fprintf(stderr, "stco offset count %"PRIu32" too big\n", offset_count);
 201         return -1;
 202     }
 203
 204     context->stco_offset_count += offset_count;
 205     context->stco_data_size += atom->size - 8;
 206
 207     for (pos = atom->data + 8, end = pos + offset_count * 4;
 208         pos < end;
 209         pos += 4) {
 210         current_offset = BE_32(pos);
 211         if (current_offset > UINT_MAX - context->moov_atom_size) {
 212             context->stco_overflow = 1;
 213         }
 214         current_offset += context->moov_atom_size;
 215         AV_WB32(pos, current_offset);
 216     }
 217
 218     return 0;
 219 }
 220
 221 static int update_co64_offsets(update_chunk_offsets_context_t *context, atom_t *atom)
 222 {
 223     uint64_t current_offset;
 224     uint32_t offset_count;
 225     unsigned char *pos;
 226     unsigned char *end;
 227
 228     printf(" patching co64 atom...\n");
 229     if (atom->size < 8) {
 230         fprintf(stderr, "co64 atom size %"PRIu64" too small\n", atom->size);
 231         return -1;
 232     }
 233
 234     offset_count = BE_32(atom->data + 4);
 235     if (offset_count > (atom->size - 8) / 8) {
 236         fprintf(stderr, "co64 offset count %"PRIu32" too big\n", offset_count);
 237         return -1;
 238     }
 239
 240     for (pos = atom->data + 8, end = pos + offset_count * 8;
 241         pos < end;
 242         pos += 8) {
 243         current_offset = BE_64(pos);
 244         current_offset += context->moov_atom_size;
 245         AV_WB64(pos, current_offset);
 246     }
 247
 248     return 0;
 249 }
 250
 251 static int update_chunk_offsets_callback(void *ctx, atom_t *atom)
 252 {
 253     update_chunk_offsets_context_t *context = ctx;
 254     int ret;
 255
 256     switch (atom->type) {
 257     case STCO_ATOM:
 258         return update_stco_offsets(context, atom);
 259
 260     case CO64_ATOM:
 261         return update_co64_offsets(context, atom);
 262
 263     case MOOV_ATOM:
 264     case TRAK_ATOM:
 265     case MDIA_ATOM:
 266     case MINF_ATOM:
 267     case STBL_ATOM:
 268         context->depth++;
 269         if (context->depth > 10) {
 270             fprintf(stderr, "atoms too deeply nested\n");
 271             return -1;
 272         }
 273
 274         ret = parse_atoms(
 275             atom->data,
 276             atom->size,
 277             update_chunk_offsets_callback,
 278             context);
 279         context->depth--;
 280         return ret;
 281     }
 282
 283     return 0;
 284 }
 285
 286 static void set_atom_size(unsigned char *header, uint32_t header_size, uint64_t size)
 287 {
 288     switch (header_size) {
 289     case 8:
 290         AV_WB32(header, size);
 291         break;
 292
 293     case 16:
 294         AV_WB64(header + 8, size);
 295         break;
 296     }
 297 }
 298
 299 static void upgrade_stco_atom(upgrade_stco_context_t *context, atom_t *atom)
 300 {
 301     unsigned char *pos;
 302     unsigned char *end;
 303     uint64_t new_offset;
 304     uint32_t offset_count;
 305     uint32_t original_offset;
 306
 307     /* Note: not performing validations since they were performed on the first pass */
 308
 309     offset_count = BE_32(atom->data + 4);
 310
 311     /* write the header */
 312     memcpy(context->dest, atom->data - atom->header_size, atom->header_size + 8);
 313     AV_WB32(context->dest + 4, CO64_ATOM);
 314     set_atom_size(context->dest, atom->header_size, atom->header_size + 8 + offset_count * 8);
 315     context->dest += atom->header_size + 8;
 316
 317     /* write the data */
 318     for (pos = atom->data + 8, end = pos + offset_count * 4;
 319         pos < end;
 320         pos += 4) {
 321         original_offset = BE_32(pos) - context->original_moov_size;
 322         new_offset = (uint64_t)original_offset + context->new_moov_size;
 323         AV_WB64(context->dest, new_offset);
 324         context->dest += 8;
 325     }
 326 }
 327
 328 static int upgrade_stco_callback(void *ctx, atom_t *atom)
 329 {
 330     upgrade_stco_context_t *context = ctx;
 331     unsigned char *start_pos;
 332     uint64_t copy_size;
 333
 334     switch (atom->type) {
 335     case STCO_ATOM:
 336         upgrade_stco_atom(context, atom);
 337         break;
 338
 339     case MOOV_ATOM:
 340     case TRAK_ATOM:
 341     case MDIA_ATOM:
 342     case MINF_ATOM:
 343     case STBL_ATOM:
 344         /* write the atom header */
 345         memcpy(context->dest, atom->data - atom->header_size, atom->header_size);
 346         start_pos = context->dest;
 347         context->dest += atom->header_size;
 348
 349         /* parse internal atoms*/
 350         if (parse_atoms(
 351             atom->data,
 352             atom->size,
 353             upgrade_stco_callback,
 354             context) < 0) {
 355             return -1;
 356         }
 357
 358         /* update the atom size */
 359         set_atom_size(start_pos, atom->header_size, context->dest - start_pos);
 360         break;
 361
 362     default:
 363         copy_size = atom->header_size + atom->size;
 364         memcpy(context->dest, atom->data - atom->header_size, copy_size);
 365         context->dest += copy_size;
 366         break;
 367     }
 368
 369     return 0;
 370 }
 371
 372 static int update_moov_atom(
 373     unsigned char **moov_atom,
 374     uint64_t *moov_atom_size)
 375 {
 376     update_chunk_offsets_context_t update_context = { 0 };
 377     upgrade_stco_context_t upgrade_context;
 378     unsigned char *new_moov_atom;
 379
 380     update_context.moov_atom_size = *moov_atom_size;
 381
 382     if (parse_atoms(
 383         *moov_atom,
 384         *moov_atom_size,
 385         update_chunk_offsets_callback,
 386         &update_context) < 0) {
 387         return -1;
 388     }
 389
 390     if (!update_context.stco_overflow) {
 391         return 0;
 392     }
 393
 394     printf(" upgrading stco atoms to co64...\n");
 395     upgrade_context.new_moov_size = *moov_atom_size +
 396         update_context.stco_offset_count * 8 -
 397         update_context.stco_data_size;
 398
 399     new_moov_atom = malloc(upgrade_context.new_moov_size);
 400     if (new_moov_atom == NULL) {
 401         fprintf(stderr, "could not allocate %"PRIu64" bytes for updated moov atom\n",
 402             upgrade_context.new_moov_size);
 403         return -1;
 404     }
 405
 406     upgrade_context.original_moov_size = *moov_atom_size;
 407     upgrade_context.dest = new_moov_atom;
 408
 409     if (parse_atoms(
 410         *moov_atom,
 411         *moov_atom_size,
 412         upgrade_stco_callback,
 413         &upgrade_context) < 0) {
 414         free(new_moov_atom);
 415         return -1;
 416     }
 417
 418     free(*moov_atom);
 419     *moov_atom = new_moov_atom;
 420     *moov_atom_size = upgrade_context.new_moov_size;
 421
 422     if (upgrade_context.dest != *moov_atom + *moov_atom_size) {
 423         fprintf(stderr, "unexpected - wrong number of moov bytes written\n");
 424         return -1;
 425     }
 426
 427     return 0;
 428 }
 429
 430 int main(int argc, char *argv[])
 431 {
 432     FILE *infile  = NULL;
 433     FILE *outfile = NULL;
 434     unsigned char atom_bytes[ATOM_PREAMBLE_SIZE];
 435     uint32_t atom_type   = 0;
 436     uint64_t atom_size   = 0;
 437     uint64_t atom_offset = 0;
 438     int64_t last_offset;
 439     unsigned char *moov_atom = NULL;
 440     unsigned char *ftyp_atom = NULL;
 441     uint64_t moov_atom_size;
 442     uint64_t ftyp_atom_size = 0;
 443     int64_t start_offset = 0;
 444     unsigned char *copy_buffer = NULL;
 445     int bytes_to_copy;
 446     uint64_t free_size = 0;
 447     uint64_t moov_size = 0;
 448
 449     if (argc != 3) {
 450         printf("Usage: qt-faststart <infile.mov> <outfile.mov>\n"
 451                "Note: alternatively you can use -movflags +faststart in ffmpeg\n");
 452         return 0;
 453     }
 454
 455     if (!strcmp(argv[1], argv[2])) {
 456         fprintf(stderr, "input and output files need to be different\n");
 457         return 1;
 458     }
 459
 460     infile = fopen(argv[1], "rb");
 461     if (!infile) {
 462         perror(argv[1]);
 463         goto error_out;
 464     }
 465
 466     /* traverse through the atoms in the file to make sure that 'moov' is
 467      * at the end */
 468     while (!feof(infile)) {
 469         if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
 470             break;
 471         }
 472         atom_size = BE_32(&atom_bytes[0]);
 473         atom_type = BE_32(&atom_bytes[4]);
 474
 475         /* keep ftyp atom */
 476         if (atom_type == FTYP_ATOM) {
 477             if (atom_size > MAX_FTYP_ATOM_SIZE) {
 478                 fprintf(stderr, "ftyp atom size %"PRIu64" too big\n",
 479                        atom_size);
 480                 goto error_out;
 481             }
 482             ftyp_atom_size = atom_size;
 483             free(ftyp_atom);
 484             ftyp_atom = malloc(ftyp_atom_size);
 485             if (!ftyp_atom) {
 486                 fprintf(stderr, "could not allocate %"PRIu64" bytes for ftyp atom\n",
 487                        atom_size);
 488                 goto error_out;
 489             }
 490             if (fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR) ||
 491                 fread(ftyp_atom, atom_size, 1, infile) != 1 ||
 492                 (start_offset = ftello(infile)) < 0) {
 493                 perror(argv[1]);
 494                 goto error_out;
 495             }
 496         } else {
 497             int ret;
 498             /* 64-bit special case */
 499             if (atom_size == 1) {
 500                 if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
 501                     break;
 502                 }
 503                 atom_size = BE_64(&atom_bytes[0]);
 504                 ret = fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE * 2, SEEK_CUR);
 505             } else {
 506                 ret = fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE, SEEK_CUR);
 507             }
 508             if (ret) {
 509                 perror(argv[1]);
 510                 goto error_out;
 511             }
 512         }
 513         printf("%c%c%c%c %10"PRIu64" %"PRIu64"\n",
 514                (atom_type >> 24) & 255,
 515                (atom_type >> 16) & 255,
 516                (atom_type >>  8) & 255,
 517                (atom_type >>  0) & 255,
 518                atom_offset,
 519                atom_size);
 520         if ((atom_type != FREE_ATOM) &&
 521             (atom_type != JUNK_ATOM) &&
 522             (atom_type != MDAT_ATOM) &&
 523             (atom_type != MOOV_ATOM) &&
 524             (atom_type != PNOT_ATOM) &&
 525             (atom_type != SKIP_ATOM) &&
 526             (atom_type != WIDE_ATOM) &&
 527             (atom_type != PICT_ATOM) &&
 528             (atom_type != UUID_ATOM) &&
 529             (atom_type != FTYP_ATOM)) {
 530             fprintf(stderr, "encountered non-QT top-level atom (is this a QuickTime file?)\n");
 531             break;
 532         }
 533         atom_offset += atom_size;
 534
 535         /* The atom header is 8 (or 16 bytes), if the atom size (which
 536          * includes these 8 or 16 bytes) is less than that, we won't be
 537          * able to continue scanning sensibly after this atom, so break. */
 538         if (atom_size < 8)
 539             break;
 540
 541         if (atom_type == MOOV_ATOM)
 542             moov_size = atom_size;
 543
 544         if (moov_size && atom_type == FREE_ATOM) {
 545             free_size += atom_size;
 546             atom_type = MOOV_ATOM;
 547             atom_size = moov_size;
 548         }
 549     }
 550
 551     if (atom_type != MOOV_ATOM) {
 552         printf("last atom in file was not a moov atom\n");
 553         free(ftyp_atom);
 554         fclose(infile);
 555         return 0;
 556     }
 557
 558     if (atom_size < 16) {
 559         fprintf(stderr, "bad moov atom size\n");
 560         goto error_out;
 561     }
 562
 563     /* moov atom was, in fact, the last atom in the chunk; load the whole
 564      * moov atom */
 565     if (fseeko(infile, -(atom_size + free_size), SEEK_END)) {
 566         perror(argv[1]);
 567         goto error_out;
 568     }
 569     last_offset    = ftello(infile);
 570     if (last_offset < 0) {
 571         perror(argv[1]);
 572         goto error_out;
 573     }
 574     moov_atom_size = atom_size;
 575     moov_atom      = malloc(moov_atom_size);
 576     if (!moov_atom) {
 577         fprintf(stderr, "could not allocate %"PRIu64" bytes for moov atom\n", atom_size);
 578         goto error_out;
 579     }
 580     if (fread(moov_atom, atom_size, 1, infile) != 1) {
 581         perror(argv[1]);
 582         goto error_out;
 583     }
 584
 585     /* this utility does not support compressed atoms yet, so disqualify
 586      * files with compressed QT atoms */
 587     if (BE_32(&moov_atom[12]) == CMOV_ATOM) {
 588         fprintf(stderr, "this utility does not support compressed moov atoms yet\n");
 589         goto error_out;
 590     }
 591
 592     /* close; will be re-opened later */
 593     fclose(infile);
 594     infile = NULL;
 595
 596     if (update_moov_atom(&moov_atom, &moov_atom_size) < 0) {
 597         goto error_out;
 598     }
 599
 600     /* re-open the input file and open the output file */
 601     infile = fopen(argv[1], "rb");
 602     if (!infile) {
 603         perror(argv[1]);
 604         goto error_out;
 605     }
 606
 607     if (start_offset > 0) { /* seek after ftyp atom */
 608         if (fseeko(infile, start_offset, SEEK_SET)) {
 609             perror(argv[1]);
 610             goto error_out;
 611         }
 612
 613         last_offset -= start_offset;
 614     }
 615
 616     outfile = fopen(argv[2], "wb");
 617     if (!outfile) {
 618         perror(argv[2]);
 619         goto error_out;
 620     }
 621
 622     /* dump the same ftyp atom */
 623     if (ftyp_atom_size > 0) {
 624         printf(" writing ftyp atom...\n");
 625         if (fwrite(ftyp_atom, ftyp_atom_size, 1, outfile) != 1) {
 626             perror(argv[2]);
 627             goto error_out;
 628         }
 629     }
 630
 631     /* dump the new moov atom */
 632     printf(" writing moov atom...\n");
 633     if (fwrite(moov_atom, moov_atom_size, 1, outfile) != 1) {
 634         perror(argv[2]);
 635         goto error_out;
 636     }
 637
 638     /* copy the remainder of the infile, from offset 0 -> last_offset - 1 */
 639     bytes_to_copy = MIN(COPY_BUFFER_SIZE, last_offset);
 640     copy_buffer = malloc(bytes_to_copy);
 641     if (!copy_buffer) {
 642         fprintf(stderr, "could not allocate %d bytes for copy_buffer\n", bytes_to_copy);
 643         goto error_out;
 644     }
 645     printf(" copying rest of file...\n");
 646     while (last_offset) {
 647         bytes_to_copy = MIN(bytes_to_copy, last_offset);
 648
 649         if (fread(copy_buffer, bytes_to_copy, 1, infile) != 1) {
 650             perror(argv[1]);
 651             goto error_out;
 652         }
 653         if (fwrite(copy_buffer, bytes_to_copy, 1, outfile) != 1) {
 654             perror(argv[2]);
 655             goto error_out;
 656         }
 657         last_offset -= bytes_to_copy;
 658     }
 659
 660     fclose(infile);
 661     fclose(outfile);
 662     free(moov_atom);
 663     free(ftyp_atom);
 664     free(copy_buffer);
 665
 666     return 0;
 667
 668 error_out:
 669     if (infile)
 670         fclose(infile);
 671     if (outfile)
 672         fclose(outfile);
 673     free(moov_atom);
 674     free(ftyp_atom);
 675     free(copy_buffer);
 676     return 1;
 677 }