Libav 0.7.1
ffprobe.c
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00001 /*
00002  * ffprobe : Simple Media Prober based on the Libav libraries
00003  * Copyright (c) 2007-2010 Stefano Sabatini
00004  *
00005  * This file is part of Libav.
00006  *
00007  * Libav is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * Libav is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with Libav; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #include "config.h"
00023 
00024 #include "libavformat/avformat.h"
00025 #include "libavcodec/avcodec.h"
00026 #include "libavutil/opt.h"
00027 #include "libavutil/pixdesc.h"
00028 #include "libavutil/dict.h"
00029 #include "libavdevice/avdevice.h"
00030 #include "cmdutils.h"
00031 
00032 const char program_name[] = "ffprobe";
00033 const int program_birth_year = 2007;
00034 
00035 static int do_show_format  = 0;
00036 static int do_show_packets = 0;
00037 static int do_show_streams = 0;
00038 
00039 static int show_value_unit              = 0;
00040 static int use_value_prefix             = 0;
00041 static int use_byte_value_binary_prefix = 0;
00042 static int use_value_sexagesimal_format = 0;
00043 
00044 /* globals */
00045 static const OptionDef options[];
00046 
00047 /* FFprobe context */
00048 static const char *input_filename;
00049 static AVInputFormat *iformat = NULL;
00050 
00051 static const char *binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" };
00052 static const char *decimal_unit_prefixes[] = { "", "K" , "M" , "G" , "T" , "P"  };
00053 
00054 static const char *unit_second_str          = "s"    ;
00055 static const char *unit_hertz_str           = "Hz"   ;
00056 static const char *unit_byte_str            = "byte" ;
00057 static const char *unit_bit_per_second_str  = "bit/s";
00058 
00059 static char *value_string(char *buf, int buf_size, double val, const char *unit)
00060 {
00061     if (unit == unit_second_str && use_value_sexagesimal_format) {
00062         double secs;
00063         int hours, mins;
00064         secs  = val;
00065         mins  = (int)secs / 60;
00066         secs  = secs - mins * 60;
00067         hours = mins / 60;
00068         mins %= 60;
00069         snprintf(buf, buf_size, "%d:%02d:%09.6f", hours, mins, secs);
00070     } else if (use_value_prefix) {
00071         const char *prefix_string;
00072         int index;
00073 
00074         if (unit == unit_byte_str && use_byte_value_binary_prefix) {
00075             index = (int) (log(val)/log(2)) / 10;
00076             index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) -1);
00077             val /= pow(2, index*10);
00078             prefix_string = binary_unit_prefixes[index];
00079         } else {
00080             index = (int) (log10(val)) / 3;
00081             index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) -1);
00082             val /= pow(10, index*3);
00083             prefix_string = decimal_unit_prefixes[index];
00084         }
00085 
00086         snprintf(buf, buf_size, "%.3f %s%s", val, prefix_string, show_value_unit ? unit : "");
00087     } else {
00088         snprintf(buf, buf_size, "%f %s", val, show_value_unit ? unit : "");
00089     }
00090 
00091     return buf;
00092 }
00093 
00094 static char *time_value_string(char *buf, int buf_size, int64_t val, const AVRational *time_base)
00095 {
00096     if (val == AV_NOPTS_VALUE) {
00097         snprintf(buf, buf_size, "N/A");
00098     } else {
00099         value_string(buf, buf_size, val * av_q2d(*time_base), unit_second_str);
00100     }
00101 
00102     return buf;
00103 }
00104 
00105 static char *ts_value_string (char *buf, int buf_size, int64_t ts)
00106 {
00107     if (ts == AV_NOPTS_VALUE) {
00108         snprintf(buf, buf_size, "N/A");
00109     } else {
00110         snprintf(buf, buf_size, "%"PRId64, ts);
00111     }
00112 
00113     return buf;
00114 }
00115 
00116 static const char *media_type_string(enum AVMediaType media_type)
00117 {
00118     switch (media_type) {
00119     case AVMEDIA_TYPE_VIDEO:      return "video";
00120     case AVMEDIA_TYPE_AUDIO:      return "audio";
00121     case AVMEDIA_TYPE_DATA:       return "data";
00122     case AVMEDIA_TYPE_SUBTITLE:   return "subtitle";
00123     case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
00124     default:                      return "unknown";
00125     }
00126 }
00127 
00128 static void show_packet(AVFormatContext *fmt_ctx, AVPacket *pkt)
00129 {
00130     char val_str[128];
00131     AVStream *st = fmt_ctx->streams[pkt->stream_index];
00132 
00133     printf("[PACKET]\n");
00134     printf("codec_type=%s\n"   , media_type_string(st->codec->codec_type));
00135     printf("stream_index=%d\n" , pkt->stream_index);
00136     printf("pts=%s\n"          , ts_value_string  (val_str, sizeof(val_str), pkt->pts));
00137     printf("pts_time=%s\n"     , time_value_string(val_str, sizeof(val_str), pkt->pts, &st->time_base));
00138     printf("dts=%s\n"          , ts_value_string  (val_str, sizeof(val_str), pkt->dts));
00139     printf("dts_time=%s\n"     , time_value_string(val_str, sizeof(val_str), pkt->dts, &st->time_base));
00140     printf("duration=%s\n"     , ts_value_string  (val_str, sizeof(val_str), pkt->duration));
00141     printf("duration_time=%s\n", time_value_string(val_str, sizeof(val_str), pkt->duration, &st->time_base));
00142     printf("size=%s\n"         , value_string     (val_str, sizeof(val_str), pkt->size, unit_byte_str));
00143     printf("pos=%"PRId64"\n"   , pkt->pos);
00144     printf("flags=%c\n"        , pkt->flags & AV_PKT_FLAG_KEY ? 'K' : '_');
00145     printf("[/PACKET]\n");
00146 }
00147 
00148 static void show_packets(AVFormatContext *fmt_ctx)
00149 {
00150     AVPacket pkt;
00151 
00152     av_init_packet(&pkt);
00153 
00154     while (!av_read_frame(fmt_ctx, &pkt))
00155         show_packet(fmt_ctx, &pkt);
00156 }
00157 
00158 static void show_stream(AVFormatContext *fmt_ctx, int stream_idx)
00159 {
00160     AVStream *stream = fmt_ctx->streams[stream_idx];
00161     AVCodecContext *dec_ctx;
00162     AVCodec *dec;
00163     char val_str[128];
00164     AVDictionaryEntry *tag = NULL;
00165     AVRational display_aspect_ratio;
00166 
00167     printf("[STREAM]\n");
00168 
00169     printf("index=%d\n",        stream->index);
00170 
00171     if ((dec_ctx = stream->codec)) {
00172         if ((dec = dec_ctx->codec)) {
00173             printf("codec_name=%s\n",         dec->name);
00174             printf("codec_long_name=%s\n",    dec->long_name);
00175         } else {
00176             printf("codec_name=unknown\n");
00177         }
00178 
00179         printf("codec_type=%s\n",         media_type_string(dec_ctx->codec_type));
00180         printf("codec_time_base=%d/%d\n", dec_ctx->time_base.num, dec_ctx->time_base.den);
00181 
00182         /* print AVI/FourCC tag */
00183         av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag);
00184         printf("codec_tag_string=%s\n", val_str);
00185         printf("codec_tag=0x%04x\n", dec_ctx->codec_tag);
00186 
00187         switch (dec_ctx->codec_type) {
00188         case AVMEDIA_TYPE_VIDEO:
00189             printf("width=%d\n",                   dec_ctx->width);
00190             printf("height=%d\n",                  dec_ctx->height);
00191             printf("has_b_frames=%d\n",            dec_ctx->has_b_frames);
00192             if (dec_ctx->sample_aspect_ratio.num) {
00193                 printf("sample_aspect_ratio=%d:%d\n", dec_ctx->sample_aspect_ratio.num,
00194                                                       dec_ctx->sample_aspect_ratio.den);
00195                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
00196                           dec_ctx->width  * dec_ctx->sample_aspect_ratio.num,
00197                           dec_ctx->height * dec_ctx->sample_aspect_ratio.den,
00198                           1024*1024);
00199                 printf("display_aspect_ratio=%d:%d\n", display_aspect_ratio.num,
00200                                                        display_aspect_ratio.den);
00201             }
00202             printf("pix_fmt=%s\n",                 dec_ctx->pix_fmt != PIX_FMT_NONE ?
00203                    av_pix_fmt_descriptors[dec_ctx->pix_fmt].name : "unknown");
00204             break;
00205 
00206         case AVMEDIA_TYPE_AUDIO:
00207             printf("sample_rate=%s\n",             value_string(val_str, sizeof(val_str),
00208                                                                 dec_ctx->sample_rate,
00209                                                                 unit_hertz_str));
00210             printf("channels=%d\n",                dec_ctx->channels);
00211             printf("bits_per_sample=%d\n",         av_get_bits_per_sample(dec_ctx->codec_id));
00212             break;
00213         }
00214     } else {
00215         printf("codec_type=unknown\n");
00216     }
00217 
00218     if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS)
00219         printf("id=0x%x\n", stream->id);
00220     printf("r_frame_rate=%d/%d\n",         stream->r_frame_rate.num,   stream->r_frame_rate.den);
00221     printf("avg_frame_rate=%d/%d\n",       stream->avg_frame_rate.num, stream->avg_frame_rate.den);
00222     printf("time_base=%d/%d\n",            stream->time_base.num,      stream->time_base.den);
00223     printf("start_time=%s\n",   time_value_string(val_str, sizeof(val_str), stream->start_time,
00224                                                   &stream->time_base));
00225     printf("duration=%s\n",     time_value_string(val_str, sizeof(val_str), stream->duration,
00226                                                   &stream->time_base));
00227     if (stream->nb_frames)
00228         printf("nb_frames=%"PRId64"\n",    stream->nb_frames);
00229 
00230     while ((tag = av_dict_get(stream->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
00231         printf("TAG:%s=%s\n", tag->key, tag->value);
00232 
00233     printf("[/STREAM]\n");
00234 }
00235 
00236 static void show_format(AVFormatContext *fmt_ctx)
00237 {
00238     AVDictionaryEntry *tag = NULL;
00239     char val_str[128];
00240 
00241     printf("[FORMAT]\n");
00242 
00243     printf("filename=%s\n",         fmt_ctx->filename);
00244     printf("nb_streams=%d\n",       fmt_ctx->nb_streams);
00245     printf("format_name=%s\n",      fmt_ctx->iformat->name);
00246     printf("format_long_name=%s\n", fmt_ctx->iformat->long_name);
00247     printf("start_time=%s\n",       time_value_string(val_str, sizeof(val_str), fmt_ctx->start_time,
00248                                                       &AV_TIME_BASE_Q));
00249     printf("duration=%s\n",         time_value_string(val_str, sizeof(val_str), fmt_ctx->duration,
00250                                                       &AV_TIME_BASE_Q));
00251     printf("size=%s\n",             value_string(val_str, sizeof(val_str), fmt_ctx->file_size,
00252                                                  unit_byte_str));
00253     printf("bit_rate=%s\n",         value_string(val_str, sizeof(val_str), fmt_ctx->bit_rate,
00254                                                  unit_bit_per_second_str));
00255 
00256     while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
00257         printf("TAG:%s=%s\n", tag->key, tag->value);
00258 
00259     printf("[/FORMAT]\n");
00260 }
00261 
00262 static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename)
00263 {
00264     int err, i;
00265     AVFormatContext *fmt_ctx = NULL;
00266     AVDictionaryEntry *t;
00267 
00268     if ((err = avformat_open_input(&fmt_ctx, filename, iformat, &format_opts)) < 0) {
00269         print_error(filename, err);
00270         return err;
00271     }
00272     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
00273         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
00274         return AVERROR_OPTION_NOT_FOUND;
00275     }
00276 
00277 
00278     /* fill the streams in the format context */
00279     if ((err = av_find_stream_info(fmt_ctx)) < 0) {
00280         print_error(filename, err);
00281         return err;
00282     }
00283 
00284     av_dump_format(fmt_ctx, 0, filename, 0);
00285 
00286     /* bind a decoder to each input stream */
00287     for (i = 0; i < fmt_ctx->nb_streams; i++) {
00288         AVStream *stream = fmt_ctx->streams[i];
00289         AVCodec *codec;
00290 
00291         if (!(codec = avcodec_find_decoder(stream->codec->codec_id))) {
00292             fprintf(stderr, "Unsupported codec with id %d for input stream %d\n",
00293                     stream->codec->codec_id, stream->index);
00294         } else if (avcodec_open(stream->codec, codec) < 0) {
00295             fprintf(stderr, "Error while opening codec for input stream %d\n",
00296                     stream->index);
00297         }
00298     }
00299 
00300     *fmt_ctx_ptr = fmt_ctx;
00301     return 0;
00302 }
00303 
00304 static int probe_file(const char *filename)
00305 {
00306     AVFormatContext *fmt_ctx;
00307     int ret, i;
00308 
00309     if ((ret = open_input_file(&fmt_ctx, filename)))
00310         return ret;
00311 
00312     if (do_show_packets)
00313         show_packets(fmt_ctx);
00314 
00315     if (do_show_streams)
00316         for (i = 0; i < fmt_ctx->nb_streams; i++)
00317             show_stream(fmt_ctx, i);
00318 
00319     if (do_show_format)
00320         show_format(fmt_ctx);
00321 
00322     av_close_input_file(fmt_ctx);
00323     return 0;
00324 }
00325 
00326 static void show_usage(void)
00327 {
00328     printf("Simple multimedia streams analyzer\n");
00329     printf("usage: ffprobe [OPTIONS] [INPUT_FILE]\n");
00330     printf("\n");
00331 }
00332 
00333 static int opt_format(const char *opt, const char *arg)
00334 {
00335     iformat = av_find_input_format(arg);
00336     if (!iformat) {
00337         fprintf(stderr, "Unknown input format: %s\n", arg);
00338         return AVERROR(EINVAL);
00339     }
00340     return 0;
00341 }
00342 
00343 static void opt_input_file(const char *arg)
00344 {
00345     if (input_filename) {
00346         fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
00347                 arg, input_filename);
00348         exit(1);
00349     }
00350     if (!strcmp(arg, "-"))
00351         arg = "pipe:";
00352     input_filename = arg;
00353 }
00354 
00355 static void show_help(void)
00356 {
00357     av_log_set_callback(log_callback_help);
00358     show_usage();
00359     show_help_options(options, "Main options:\n", 0, 0);
00360     printf("\n");
00361     av_opt_show2(avformat_opts, NULL,
00362                  AV_OPT_FLAG_DECODING_PARAM, 0);
00363 }
00364 
00365 static void opt_pretty(void)
00366 {
00367     show_value_unit              = 1;
00368     use_value_prefix             = 1;
00369     use_byte_value_binary_prefix = 1;
00370     use_value_sexagesimal_format = 1;
00371 }
00372 
00373 static const OptionDef options[] = {
00374 #include "cmdutils_common_opts.h"
00375     { "f", HAS_ARG, {(void*)opt_format}, "force format", "format" },
00376     { "unit", OPT_BOOL, {(void*)&show_value_unit}, "show unit of the displayed values" },
00377     { "prefix", OPT_BOOL, {(void*)&use_value_prefix}, "use SI prefixes for the displayed values" },
00378     { "byte_binary_prefix", OPT_BOOL, {(void*)&use_byte_value_binary_prefix},
00379       "use binary prefixes for byte units" },
00380     { "sexagesimal", OPT_BOOL,  {(void*)&use_value_sexagesimal_format},
00381       "use sexagesimal format HOURS:MM:SS.MICROSECONDS for time units" },
00382     { "pretty", 0, {(void*)&opt_pretty},
00383       "prettify the format of displayed values, make it more human readable" },
00384     { "show_format",  OPT_BOOL, {(void*)&do_show_format} , "show format/container info" },
00385     { "show_packets", OPT_BOOL, {(void*)&do_show_packets}, "show packets info" },
00386     { "show_streams", OPT_BOOL, {(void*)&do_show_streams}, "show streams info" },
00387     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {(void*)opt_default}, "generic catch all option", "" },
00388     { NULL, },
00389 };
00390 
00391 int main(int argc, char **argv)
00392 {
00393     int ret;
00394 
00395     av_register_all();
00396     init_opts();
00397 #if CONFIG_AVDEVICE
00398     avdevice_register_all();
00399 #endif
00400 
00401     avformat_opts = avformat_alloc_context();
00402 
00403     show_banner();
00404     parse_options(argc, argv, options, opt_input_file);
00405 
00406     if (!input_filename) {
00407         show_usage();
00408         fprintf(stderr, "You have to specify one input file.\n");
00409         fprintf(stderr, "Use -h to get full help or, even better, run 'man ffprobe'.\n");
00410         exit(1);
00411     }
00412 
00413     ret = probe_file(input_filename);
00414 
00415     av_free(avformat_opts);
00416 
00417     return ret;
00418 }