src/third_party/ffmpeg/tools/ismindex.c

   1 /*
   2  * Copyright (c) 2012 Martin Storsjo
   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  * To create a simple file for smooth streaming:
  23  * ffmpeg <normal input/transcoding options> -movflags frag_keyframe foo.ismv
  24  * ismindex -n foo foo.ismv
  25  * This step creates foo.ism and foo.ismc that is required by IIS for
  26  * serving it.
  27  *
  28  * With -ismf, it also creates foo.ismf, which maps fragment names to
  29  * start-end offsets in the ismv, for use in your own streaming server.
  30  *
  31  * By adding -path-prefix path/, the produced foo.ism will refer to the
  32  * files foo.ismv as "path/foo.ismv" - the prefix for the generated ismc
  33  * file can be set with the -ismc-prefix option similarly.
  34  *
  35  * To pre-split files for serving as static files by a web server without
  36  * any extra server support, create the ismv file as above, and split it:
  37  * ismindex -split foo.ismv
  38  * This step creates a file Manifest and directories QualityLevel(...),
  39  * that can be read directly by a smooth streaming player.
  40  *
  41  * The -output dir option can be used to request that output files
  42  * (both .ism/.ismc, or Manifest/QualityLevels* when splitting)
  43  * should be written to this directory instead of in the current directory.
  44  * (The directory itself isn't created if it doesn't already exist.)
  45  */
  46
  47 #include <stdio.h>
  48 #include <string.h>
  49
  50 #include "cmdutils.h"
  51
  52 #include "libavformat/avformat.h"
  53 #include "libavformat/os_support.h"
  54 #include "libavutil/intreadwrite.h"
  55 #include "libavutil/mathematics.h"
  56
  57 static int usage(const char *argv0, int ret)
  58 {
  59     fprintf(stderr, "%s [-split] [-ismf] [-n basename] [-path-prefix prefix] "
  60                     "[-ismc-prefix prefix] [-output dir] file1 [file2] ...\n", argv0);
  61     return ret;
  62 }
  63
  64 struct MoofOffset {
  65     int64_t time;
  66     int64_t offset;
  67     int64_t duration;
  68 };
  69
  70 struct Track {
  71     const char *name;
  72     int64_t duration;
  73     int bitrate;
  74     int track_id;
  75     int is_audio, is_video;
  76     int width, height;
  77     int chunks;
  78     int sample_rate, channels;
  79     uint8_t *codec_private;
  80     int codec_private_size;
  81     struct MoofOffset *offsets;
  82     int timescale;
  83     const char *fourcc;
  84     int blocksize;
  85     int tag;
  86 };
  87
  88 struct Tracks {
  89     int nb_tracks;
  90     int64_t duration;
  91     struct Track **tracks;
  92     int video_track, audio_track;
  93     int nb_video_tracks, nb_audio_tracks;
  94 };
  95
  96 static int expect_tag(int32_t got_tag, int32_t expected_tag) {
  97     if (got_tag != expected_tag) {
  98         char got_tag_str[4], expected_tag_str[4];
  99         AV_WB32(got_tag_str, got_tag);
 100         AV_WB32(expected_tag_str, expected_tag);
 101         fprintf(stderr, "wanted tag %.4s, got %.4s\n", expected_tag_str,
 102                 got_tag_str);
 103         return -1;
 104     }
 105     return 0;
 106 }
 107
 108 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
 109 {
 110     int32_t size, tag;
 111
 112     size = avio_rb32(in);
 113     tag  = avio_rb32(in);
 114     avio_wb32(out, size);
 115     avio_wb32(out, tag);
 116     if (expect_tag(tag, tag_name) != 0)
 117         return -1;
 118     size -= 8;
 119     while (size > 0) {
 120         char buf[1024];
 121         int len = FFMIN(sizeof(buf), size);
 122         int got;
 123         if ((got = avio_read(in, buf, len)) != len) {
 124             fprintf(stderr, "short read, wanted %d, got %d\n", len, got);
 125             break;
 126         }
 127         avio_write(out, buf, len);
 128         size -= len;
 129     }
 130     return 0;
 131 }
 132
 133 static int skip_tag(AVIOContext *in, int32_t tag_name)
 134 {
 135     int64_t pos = avio_tell(in);
 136     int32_t size, tag;
 137
 138     size = avio_rb32(in);
 139     tag  = avio_rb32(in);
 140     if (expect_tag(tag, tag_name) != 0)
 141         return -1;
 142     avio_seek(in, pos + size, SEEK_SET);
 143     return 0;
 144 }
 145
 146 static int write_fragment(const char *filename, AVIOContext *in)
 147 {
 148     AVIOContext *out = NULL;
 149     int ret;
 150
 151     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0) {
 152         char errbuf[100];
 153         av_strerror(ret, errbuf, sizeof(errbuf));
 154         fprintf(stderr, "Unable to open %s: %s\n", filename, errbuf);
 155         return ret;
 156     }
 157     ret = copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
 158     if (!ret)
 159         ret = copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
 160
 161     avio_flush(out);
 162     avio_close(out);
 163
 164     return ret;
 165 }
 166
 167 static int skip_fragment(AVIOContext *in)
 168 {
 169     int ret;
 170     ret = skip_tag(in, MKBETAG('m', 'o', 'o', 'f'));
 171     if (!ret)
 172         ret = skip_tag(in, MKBETAG('m', 'd', 'a', 't'));
 173     return ret;
 174 }
 175
 176 static int write_fragments(struct Tracks *tracks, int start_index,
 177                            AVIOContext *in, const char *basename,
 178                            int split, int ismf, const char* output_prefix)
 179 {
 180     char dirname[2048], filename[2048], idxname[2048];
 181     int i, j, ret = 0, fragment_ret;
 182     FILE* out = NULL;
 183
 184     if (ismf) {
 185         snprintf(idxname, sizeof(idxname), "%s%s.ismf", output_prefix, basename);
 186         out = fopen(idxname, "w");
 187         if (!out) {
 188             ret = AVERROR(errno);
 189             perror(idxname);
 190             goto fail;
 191         }
 192     }
 193     for (i = start_index; i < tracks->nb_tracks; i++) {
 194         struct Track *track = tracks->tracks[i];
 195         const char *type    = track->is_video ? "video" : "audio";
 196         snprintf(dirname, sizeof(dirname), "%sQualityLevels(%d)", output_prefix, track->bitrate);
 197         if (split) {
 198             if (mkdir(dirname, 0777) == -1 && errno != EEXIST) {
 199                 ret = AVERROR(errno);
 200                 perror(dirname);
 201                 goto fail;
 202             }
 203         }
 204         for (j = 0; j < track->chunks; j++) {
 205             snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
 206                      dirname, type, track->offsets[j].time);
 207             avio_seek(in, track->offsets[j].offset, SEEK_SET);
 208             if (ismf)
 209                 fprintf(out, "%s %"PRId64, filename, avio_tell(in));
 210             if (split)
 211                 fragment_ret = write_fragment(filename, in);
 212             else
 213                 fragment_ret = skip_fragment(in);
 214             if (ismf)
 215                 fprintf(out, " %"PRId64"\n", avio_tell(in));
 216             if (fragment_ret != 0) {
 217                 fprintf(stderr, "failed fragment %d in track %d (%s)\n", j,
 218                         track->track_id, track->name);
 219                 ret = fragment_ret;
 220             }
 221         }
 222     }
 223 fail:
 224     if (out)
 225         fclose(out);
 226     return ret;
 227 }
 228
 229 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
 230 {
 231     int ret = AVERROR_EOF, track_id;
 232     int version, fieldlength, i, j;
 233     int64_t pos   = avio_tell(f);
 234     uint32_t size = avio_rb32(f);
 235     struct Track *track = NULL;
 236
 237     if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
 238         goto fail;
 239     version = avio_r8(f);
 240     avio_rb24(f);
 241     track_id = avio_rb32(f); /* track id */
 242     for (i = start_index; i < tracks->nb_tracks && !track; i++)
 243         if (tracks->tracks[i]->track_id == track_id)
 244             track = tracks->tracks[i];
 245     if (!track) {
 246         /* Ok, continue parsing the next atom */
 247         ret = 0;
 248         goto fail;
 249     }
 250     fieldlength = avio_rb32(f);
 251     track->chunks  = avio_rb32(f);
 252     track->offsets = av_mallocz_array(track->chunks, sizeof(*track->offsets));
 253     if (!track->offsets) {
 254         ret = AVERROR(ENOMEM);
 255         goto fail;
 256     }
 257     for (i = 0; i < track->chunks; i++) {
 258         if (version == 1) {
 259             track->offsets[i].time   = avio_rb64(f);
 260             track->offsets[i].offset = avio_rb64(f);
 261         } else {
 262             track->offsets[i].time   = avio_rb32(f);
 263             track->offsets[i].offset = avio_rb32(f);
 264         }
 265         for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
 266             avio_r8(f);
 267         for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
 268             avio_r8(f);
 269         for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
 270             avio_r8(f);
 271         if (i > 0)
 272             track->offsets[i - 1].duration = track->offsets[i].time -
 273                                              track->offsets[i - 1].time;
 274     }
 275     if (track->chunks > 0)
 276         track->offsets[track->chunks - 1].duration = track->duration -
 277                                                      track->offsets[track->chunks - 1].time;
 278     ret = 0;
 279
 280 fail:
 281     avio_seek(f, pos + size, SEEK_SET);
 282     return ret;
 283 }
 284
 285 static int read_mfra(struct Tracks *tracks, int start_index,
 286                      const char *file, int split, int ismf,
 287                      const char *basename, const char* output_prefix)
 288 {
 289     int err = 0;
 290     const char* err_str = "";
 291     AVIOContext *f = NULL;
 292     int32_t mfra_size;
 293
 294     if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
 295         goto fail;
 296     avio_seek(f, avio_size(f) - 4, SEEK_SET);
 297     mfra_size = avio_rb32(f);
 298     avio_seek(f, -mfra_size, SEEK_CUR);
 299     if (avio_rb32(f) != mfra_size) {
 300         err = AVERROR_INVALIDDATA;
 301         err_str = "mfra size mismatch";
 302         goto fail;
 303     }
 304     if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
 305         err = AVERROR_INVALIDDATA;
 306         err_str = "mfra tag mismatch";
 307         goto fail;
 308     }
 309     while (!read_tfra(tracks, start_index, f)) {
 310         /* Empty */
 311     }
 312
 313     if (split || ismf)
 314         err = write_fragments(tracks, start_index, f, basename, split, ismf,
 315                               output_prefix);
 316     err_str = "error in write_fragments";
 317
 318 fail:
 319     if (f)
 320         avio_close(f);
 321     if (err)
 322         fprintf(stderr, "Unable to read the MFRA atom in %s (%s)\n", file, err_str);
 323     return err;
 324 }
 325
 326 static int get_private_data(struct Track *track, AVCodecContext *codec)
 327 {
 328     track->codec_private_size = codec->extradata_size;
 329     track->codec_private      = av_mallocz(codec->extradata_size);
 330     if (!track->codec_private)
 331         return AVERROR(ENOMEM);
 332     memcpy(track->codec_private, codec->extradata, codec->extradata_size);
 333     return 0;
 334 }
 335
 336 static int get_video_private_data(struct Track *track, AVCodecContext *codec)
 337 {
 338     AVIOContext *io = NULL;
 339     uint16_t sps_size, pps_size;
 340     int err;
 341
 342     if (codec->codec_id == AV_CODEC_ID_VC1)
 343         return get_private_data(track, codec);
 344
 345     if ((err = avio_open_dyn_buf(&io)) < 0)
 346         goto fail;
 347     err = AVERROR(EINVAL);
 348     if (codec->extradata_size < 11 || codec->extradata[0] != 1)
 349         goto fail;
 350     sps_size = AV_RB16(&codec->extradata[6]);
 351     if (11 + sps_size > codec->extradata_size)
 352         goto fail;
 353     avio_wb32(io, 0x00000001);
 354     avio_write(io, &codec->extradata[8], sps_size);
 355     pps_size = AV_RB16(&codec->extradata[9 + sps_size]);
 356     if (11 + sps_size + pps_size > codec->extradata_size)
 357         goto fail;
 358     avio_wb32(io, 0x00000001);
 359     avio_write(io, &codec->extradata[11 + sps_size], pps_size);
 360     err = 0;
 361
 362 fail:
 363     track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
 364     return err;
 365 }
 366
 367 static int handle_file(struct Tracks *tracks, const char *file, int split,
 368                        int ismf, const char *basename,
 369                        const char* output_prefix)
 370 {
 371     AVFormatContext *ctx = NULL;
 372     int err = 0, i, orig_tracks = tracks->nb_tracks;
 373     char errbuf[50], *ptr;
 374     struct Track *track;
 375
 376     err = avformat_open_input(&ctx, file, NULL, NULL);
 377     if (err < 0) {
 378         av_strerror(err, errbuf, sizeof(errbuf));
 379         fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
 380         return 1;
 381     }
 382
 383     err = avformat_find_stream_info(ctx, NULL);
 384     if (err < 0) {
 385         av_strerror(err, errbuf, sizeof(errbuf));
 386         fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
 387         goto fail;
 388     }
 389
 390     if (ctx->nb_streams < 1) {
 391         fprintf(stderr, "No streams found in %s\n", file);
 392         goto fail;
 393     }
 394
 395     for (i = 0; i < ctx->nb_streams; i++) {
 396         struct Track **temp;
 397         AVStream *st = ctx->streams[i];
 398
 399         if (st->codec->bit_rate == 0) {
 400             fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n",
 401                     st->id, file);
 402             continue;
 403         }
 404
 405         track = av_mallocz(sizeof(*track));
 406         if (!track) {
 407             err = AVERROR(ENOMEM);
 408             goto fail;
 409         }
 410         temp = av_realloc(tracks->tracks,
 411                           sizeof(*tracks->tracks) * (tracks->nb_tracks + 1));
 412         if (!temp) {
 413             av_free(track);
 414             err = AVERROR(ENOMEM);
 415             goto fail;
 416         }
 417         tracks->tracks = temp;
 418         tracks->tracks[tracks->nb_tracks] = track;
 419
 420         track->name = file;
 421         if ((ptr = strrchr(file, '/')))
 422             track->name = ptr + 1;
 423
 424         track->bitrate   = st->codec->bit_rate;
 425         track->track_id  = st->id;
 426         track->timescale = st->time_base.den;
 427         track->duration  = st->duration;
 428         track->is_audio  = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
 429         track->is_video  = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
 430
 431         if (!track->is_audio && !track->is_video) {
 432             fprintf(stderr,
 433                     "Track %d in %s is neither video nor audio, skipping\n",
 434                     track->track_id, file);
 435             av_freep(&tracks->tracks[tracks->nb_tracks]);
 436             continue;
 437         }
 438
 439         tracks->duration = FFMAX(tracks->duration,
 440                                  av_rescale_rnd(track->duration, AV_TIME_BASE,
 441                                                 track->timescale, AV_ROUND_UP));
 442
 443         if (track->is_audio) {
 444             if (tracks->audio_track < 0)
 445                 tracks->audio_track = tracks->nb_tracks;
 446             tracks->nb_audio_tracks++;
 447             track->channels    = st->codec->channels;
 448             track->sample_rate = st->codec->sample_rate;
 449             if (st->codec->codec_id == AV_CODEC_ID_AAC) {
 450                 track->fourcc    = "AACL";
 451                 track->tag       = 255;
 452                 track->blocksize = 4;
 453             } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
 454                 track->fourcc    = "WMAP";
 455                 track->tag       = st->codec->codec_tag;
 456                 track->blocksize = st->codec->block_align;
 457             }
 458             get_private_data(track, st->codec);
 459         }
 460         if (track->is_video) {
 461             if (tracks->video_track < 0)
 462                 tracks->video_track = tracks->nb_tracks;
 463             tracks->nb_video_tracks++;
 464             track->width  = st->codec->width;
 465             track->height = st->codec->height;
 466             if (st->codec->codec_id == AV_CODEC_ID_H264)
 467                 track->fourcc = "H264";
 468             else if (st->codec->codec_id == AV_CODEC_ID_VC1)
 469                 track->fourcc = "WVC1";
 470             get_video_private_data(track, st->codec);
 471         }
 472
 473         tracks->nb_tracks++;
 474     }
 475
 476     avformat_close_input(&ctx);
 477
 478     err = read_mfra(tracks, orig_tracks, file, split, ismf, basename,
 479                     output_prefix);
 480
 481 fail:
 482     if (ctx)
 483         avformat_close_input(&ctx);
 484     return err;
 485 }
 486
 487 static void output_server_manifest(struct Tracks *tracks, const char *basename,
 488                                    const char *output_prefix,
 489                                    const char *path_prefix,
 490                                    const char *ismc_prefix)
 491 {
 492     char filename[1000];
 493     FILE *out;
 494     int i;
 495
 496     snprintf(filename, sizeof(filename), "%s%s.ism", output_prefix, basename);
 497     out = fopen(filename, "w");
 498     if (!out) {
 499         perror(filename);
 500         return;
 501     }
 502     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 503     fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
 504     fprintf(out, "\t<head>\n");
 505     fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
 506                  "content=\"%s%s.ismc\" />\n", ismc_prefix, basename);
 507     fprintf(out, "\t</head>\n");
 508     fprintf(out, "\t<body>\n");
 509     fprintf(out, "\t\t<switch>\n");
 510     for (i = 0; i < tracks->nb_tracks; i++) {
 511         struct Track *track = tracks->tracks[i];
 512         const char *type    = track->is_video ? "video" : "audio";
 513         fprintf(out, "\t\t\t<%s src=\"%s%s\" systemBitrate=\"%d\">\n",
 514                 type, path_prefix, track->name, track->bitrate);
 515         fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
 516                      "valueType=\"data\" />\n", track->track_id);
 517         fprintf(out, "\t\t\t</%s>\n", type);
 518     }
 519     fprintf(out, "\t\t</switch>\n");
 520     fprintf(out, "\t</body>\n");
 521     fprintf(out, "</smil>\n");
 522     fclose(out);
 523 }
 524
 525 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
 526                                const char *type)
 527 {
 528     int i, j;
 529     struct Track *track = tracks->tracks[main];
 530     int should_print_time_mismatch = 1;
 531
 532     for (i = 0; i < track->chunks; i++) {
 533         for (j = main + 1; j < tracks->nb_tracks; j++) {
 534             if (tracks->tracks[j]->is_audio == track->is_audio) {
 535                 if (track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration) {
 536                     fprintf(stderr, "Mismatched duration of %s chunk %d in %s (%d) and %s (%d)\n",
 537                             type, i, track->name, main, tracks->tracks[j]->name, j);
 538                     should_print_time_mismatch = 1;
 539                 }
 540                 if (track->offsets[i].time != tracks->tracks[j]->offsets[i].time) {
 541                     if (should_print_time_mismatch)
 542                         fprintf(stderr, "Mismatched (start) time of %s chunk %d in %s (%d) and %s (%d)\n",
 543                                 type, i, track->name, main, tracks->tracks[j]->name, j);
 544                     should_print_time_mismatch = 0;
 545                 }
 546             }
 547         }
 548         fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" />\n",
 549                 i, track->offsets[i].duration);
 550     }
 551 }
 552
 553 static void output_client_manifest(struct Tracks *tracks, const char *basename,
 554                                    const char *output_prefix, int split)
 555 {
 556     char filename[1000];
 557     FILE *out;
 558     int i, j;
 559
 560     if (split)
 561         snprintf(filename, sizeof(filename), "%sManifest", output_prefix);
 562     else
 563         snprintf(filename, sizeof(filename), "%s%s.ismc", output_prefix, basename);
 564     out = fopen(filename, "w");
 565     if (!out) {
 566         perror(filename);
 567         return;
 568     }
 569     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 570     fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
 571                  "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
 572     if (tracks->video_track >= 0) {
 573         struct Track *track = tracks->tracks[tracks->video_track];
 574         struct Track *first_track = track;
 575         int index = 0;
 576         fprintf(out,
 577                 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
 578                 "Chunks=\"%d\" "
 579                 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
 580                 tracks->nb_video_tracks, track->chunks);
 581         for (i = 0; i < tracks->nb_tracks; i++) {
 582             track = tracks->tracks[i];
 583             if (!track->is_video)
 584                 continue;
 585             fprintf(out,
 586                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 587                     "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
 588                     "CodecPrivateData=\"",
 589                     index, track->bitrate, track->fourcc, track->width, track->height);
 590             for (j = 0; j < track->codec_private_size; j++)
 591                 fprintf(out, "%02X", track->codec_private[j]);
 592             fprintf(out, "\" />\n");
 593             index++;
 594             if (track->chunks != first_track->chunks)
 595                 fprintf(stderr, "Mismatched number of video chunks in %s (id: %d, chunks %d) and %s (id: %d, chunks %d)\n",
 596                         track->name, track->track_id, track->chunks, first_track->name, first_track->track_id, first_track->chunks);
 597         }
 598         print_track_chunks(out, tracks, tracks->video_track, "video");
 599         fprintf(out, "\t</StreamIndex>\n");
 600     }
 601     if (tracks->audio_track >= 0) {
 602         struct Track *track = tracks->tracks[tracks->audio_track];
 603         struct Track *first_track = track;
 604         int index = 0;
 605         fprintf(out,
 606                 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
 607                 "Chunks=\"%d\" "
 608                 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
 609                 tracks->nb_audio_tracks, track->chunks);
 610         for (i = 0; i < tracks->nb_tracks; i++) {
 611             track = tracks->tracks[i];
 612             if (!track->is_audio)
 613                 continue;
 614             fprintf(out,
 615                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
 616                     "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
 617                     "BitsPerSample=\"16\" PacketSize=\"%d\" "
 618                     "AudioTag=\"%d\" CodecPrivateData=\"",
 619                     index, track->bitrate, track->fourcc, track->sample_rate,
 620                     track->channels, track->blocksize, track->tag);
 621             for (j = 0; j < track->codec_private_size; j++)
 622                 fprintf(out, "%02X", track->codec_private[j]);
 623             fprintf(out, "\" />\n");
 624             index++;
 625             if (track->chunks != first_track->chunks)
 626                 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
 627                         track->name, first_track->name);
 628         }
 629         print_track_chunks(out, tracks, tracks->audio_track, "audio");
 630         fprintf(out, "\t</StreamIndex>\n");
 631     }
 632     fprintf(out, "</SmoothStreamingMedia>\n");
 633     fclose(out);
 634 }
 635
 636 static void clean_tracks(struct Tracks *tracks)
 637 {
 638     int i;
 639     for (i = 0; i < tracks->nb_tracks; i++) {
 640         av_freep(&tracks->tracks[i]->codec_private);
 641         av_freep(&tracks->tracks[i]->offsets);
 642         av_freep(&tracks->tracks[i]);
 643     }
 644     av_freep(&tracks->tracks);
 645     tracks->nb_tracks = 0;
 646 }
 647
 648 int main(int argc, char **argv)
 649 {
 650     const char *basename = NULL;
 651     const char *path_prefix = "", *ismc_prefix = "";
 652     const char *output_prefix = "";
 653     char output_prefix_buf[2048];
 654     int split = 0, ismf = 0, i;
 655     struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
 656
 657     av_register_all();
 658
 659     for (i = 1; i < argc; i++) {
 660         if (!strcmp(argv[i], "-n")) {
 661             basename = argv[i + 1];
 662             i++;
 663         } else if (!strcmp(argv[i], "-path-prefix")) {
 664             path_prefix = argv[i + 1];
 665             i++;
 666         } else if (!strcmp(argv[i], "-ismc-prefix")) {
 667             ismc_prefix = argv[i + 1];
 668             i++;
 669         } else if (!strcmp(argv[i], "-output")) {
 670             output_prefix = argv[i + 1];
 671             i++;
 672             if (output_prefix[strlen(output_prefix) - 1] != '/') {
 673                 snprintf(output_prefix_buf, sizeof(output_prefix_buf),
 674                          "%s/", output_prefix);
 675                 output_prefix = output_prefix_buf;
 676             }
 677         } else if (!strcmp(argv[i], "-split")) {
 678             split = 1;
 679         } else if (!strcmp(argv[i], "-ismf")) {
 680             ismf = 1;
 681         } else if (argv[i][0] == '-') {
 682             return usage(argv[0], 1);
 683         } else {
 684             if (!basename)
 685                 ismf = 0;
 686             if (handle_file(&tracks, argv[i], split, ismf,
 687                             basename, output_prefix))
 688                 return 1;
 689         }
 690     }
 691     if (!tracks.nb_tracks || (!basename && !split))
 692         return usage(argv[0], 1);
 693
 694     if (!split)
 695         output_server_manifest(&tracks, basename, output_prefix,
 696                                path_prefix, ismc_prefix);
 697     output_client_manifest(&tracks, basename, output_prefix, split);
 698
 699     clean_tracks(&tracks);
 700
 701     return 0;
 702 }