/* * avprobe : Simple Media Prober based on the Libav libraries * Copyright (c) 2007-2010 Stefano Sabatini * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "config.h" #include "libavformat/avformat.h" #include "libavcodec/avcodec.h" #include "libavutil/opt.h" #include "libavutil/pixdesc.h" #include "libavutil/dict.h" #include "libavutil/libm.h" #include "libavdevice/avdevice.h" #include "cmdutils.h" const char program_name[] = "avprobe"; const int program_birth_year = 2007; static int do_show_format = 0; static AVDictionary *fmt_entries_to_show = NULL; static int nb_fmt_entries_to_show; static int do_show_packets = 0; static int do_show_streams = 0; static int show_value_unit = 0; static int use_value_prefix = 0; static int use_byte_value_binary_prefix = 0; static int use_value_sexagesimal_format = 0; /* globals */ static const OptionDef *options; /* AVprobe context */ static const char *input_filename; static AVInputFormat *iformat = NULL; static const char *const binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" }; static const char *const decimal_unit_prefixes[] = { "", "K" , "M" , "G" , "T" , "P" }; static const char unit_second_str[] = "s" ; static const char unit_hertz_str[] = "Hz" ; static const char unit_byte_str[] = "byte" ; static const char unit_bit_per_second_str[] = "bit/s"; static void exit_program(void) { av_dict_free(&fmt_entries_to_show); } /* * The output is structured in array and objects that might contain items * Array could require the objects within to not be named. * Object could require the items within to be named. * * For flat representation the name of each section is saved on prefix so it * can be rendered in order to represent nested structures (e.g. array of * objects for the packets list). * * Within an array each element can need an unique identifier or an index. * * Nesting level is accounted separately. */ typedef enum { ARRAY, OBJECT } ProbeElementType; typedef struct { const char *name; ProbeElementType type; int64_t index; int64_t nb_elems; } ProbeElement; typedef struct { ProbeElement *prefix; int level; void (*print_header)(void); void (*print_footer)(void); void (*print_array_header) (const char *name); void (*print_array_footer) (const char *name); void (*print_object_header)(const char *name); void (*print_object_footer)(const char *name); void (*print_integer) (const char *key, int64_t value); void (*print_string) (const char *key, const char *value); } OutputContext; static AVIOContext *probe_out = NULL; static OutputContext octx; #define AVP_INDENT() avio_printf(probe_out, "%*c", octx.level * 2, ' ') /* * Default format, INI * * - all key and values are utf8 * - '.' is the subgroup separator * - newlines and the following characters are escaped * - '\' is the escape character * - '#' is the comment * - '=' is the key/value separators * - ':' is not used but usually parsed as key/value separator */ static void ini_print_header(void) { avio_printf(probe_out, "# avprobe output\n\n"); } static void ini_print_footer(void) { avio_w8(probe_out, '\n'); } static void ini_escape_print(const char *s) { int i = 0; char c = 0; while (c = s[i++]) { switch (c) { case '\r': avio_printf(probe_out, "%s", "\\r"); break; case '\n': avio_printf(probe_out, "%s", "\\n"); break; case '\f': avio_printf(probe_out, "%s", "\\f"); break; case '\b': avio_printf(probe_out, "%s", "\\b"); break; case '\t': avio_printf(probe_out, "%s", "\\t"); break; case '\\': case '#' : case '=' : case ':' : avio_w8(probe_out, '\\'); default: if ((unsigned char)c < 32) avio_printf(probe_out, "\\x00%02x", c & 0xff); else avio_w8(probe_out, c); break; } } } static void ini_print_array_header(const char *name) { if (octx.prefix[octx.level -1].nb_elems) avio_printf(probe_out, "\n"); } static void ini_print_object_header(const char *name) { int i; ProbeElement *el = octx.prefix + octx.level -1; if (el->nb_elems) avio_printf(probe_out, "\n"); avio_printf(probe_out, "["); for (i = 1; i < octx.level; i++) { el = octx.prefix + i; avio_printf(probe_out, "%s.", el->name); if (el->index >= 0) avio_printf(probe_out, "%"PRId64".", el->index); } avio_printf(probe_out, "%s", name); if (el && el->type == ARRAY) avio_printf(probe_out, ".%"PRId64"", el->nb_elems); avio_printf(probe_out, "]\n"); } static void ini_print_integer(const char *key, int64_t value) { ini_escape_print(key); avio_printf(probe_out, "=%"PRId64"\n", value); } static void ini_print_string(const char *key, const char *value) { ini_escape_print(key); avio_printf(probe_out, "="); ini_escape_print(value); avio_w8(probe_out, '\n'); } /* * Alternate format, JSON */ static void json_print_header(void) { avio_printf(probe_out, "{"); } static void json_print_footer(void) { avio_printf(probe_out, "}\n"); } static void json_print_array_header(const char *name) { if (octx.prefix[octx.level -1].nb_elems) avio_printf(probe_out, ",\n"); AVP_INDENT(); avio_printf(probe_out, "\"%s\" : ", name); avio_printf(probe_out, "[\n"); } static void json_print_array_footer(const char *name) { avio_printf(probe_out, "\n"); AVP_INDENT(); avio_printf(probe_out, "]"); } static void json_print_object_header(const char *name) { if (octx.prefix[octx.level -1].nb_elems) avio_printf(probe_out, ",\n"); AVP_INDENT(); if (octx.prefix[octx.level -1].type == OBJECT) avio_printf(probe_out, "\"%s\" : ", name); avio_printf(probe_out, "{\n"); } static void json_print_object_footer(const char *name) { avio_printf(probe_out, "\n"); AVP_INDENT(); avio_printf(probe_out, "}"); } static void json_print_integer(const char *key, int64_t value) { if (octx.prefix[octx.level -1].nb_elems) avio_printf(probe_out, ",\n"); AVP_INDENT(); avio_printf(probe_out, "\"%s\" : %"PRId64"", key, value); } static void json_escape_print(const char *s) { int i = 0; char c = 0; while (c = s[i++]) { switch (c) { case '\r': avio_printf(probe_out, "%s", "\\r"); break; case '\n': avio_printf(probe_out, "%s", "\\n"); break; case '\f': avio_printf(probe_out, "%s", "\\f"); break; case '\b': avio_printf(probe_out, "%s", "\\b"); break; case '\t': avio_printf(probe_out, "%s", "\\t"); break; case '\\': case '"' : avio_w8(probe_out, '\\'); default: if ((unsigned char)c < 32) avio_printf(probe_out, "\\u00%02x", c & 0xff); else avio_w8(probe_out, c); break; } } } static void json_print_string(const char *key, const char *value) { if (octx.prefix[octx.level -1].nb_elems) avio_printf(probe_out, ",\n"); AVP_INDENT(); avio_w8(probe_out, '\"'); json_escape_print(key); avio_printf(probe_out, "\" : \""); json_escape_print(value); avio_w8(probe_out, '\"'); } /* * old-style pseudo-INI */ static void old_print_object_header(const char *name) { char *str, *p; if (!strcmp(name, "tags")) return; str = p = av_strdup(name); while (*p) { *p = toupper(*p); p++; } avio_printf(probe_out, "[%s]\n", str); av_freep(&str); } static void old_print_object_footer(const char *name) { char *str, *p; if (!strcmp(name, "tags")) return; str = p = av_strdup(name); while (*p) { *p = toupper(*p); p++; } avio_printf(probe_out, "[/%s]\n", str); av_freep(&str); } static void old_print_string(const char *key, const char *value) { if (!strcmp(octx.prefix[octx.level - 1].name, "tags")) avio_printf(probe_out, "TAG:"); ini_print_string(key, value); } /* * Simple Formatter for single entries. */ static void show_format_entry_integer(const char *key, int64_t value) { if (key && av_dict_get(fmt_entries_to_show, key, NULL, 0)) { if (nb_fmt_entries_to_show > 1) avio_printf(probe_out, "%s=", key); avio_printf(probe_out, "%"PRId64"\n", value); } } static void show_format_entry_string(const char *key, const char *value) { if (key && av_dict_get(fmt_entries_to_show, key, NULL, 0)) { if (nb_fmt_entries_to_show > 1) avio_printf(probe_out, "%s=", key); avio_printf(probe_out, "%s\n", value); } } static void probe_group_enter(const char *name, int type) { int64_t count = -1; octx.prefix = av_realloc(octx.prefix, sizeof(ProbeElement) * (octx.level + 1)); if (!octx.prefix || !name) { fprintf(stderr, "Out of memory\n"); exit(1); } if (octx.level) { ProbeElement *parent = octx.prefix + octx.level -1; if (parent->type == ARRAY) count = parent->nb_elems; parent->nb_elems++; } octx.prefix[octx.level++] = (ProbeElement){name, type, count, 0}; } static void probe_group_leave(void) { --octx.level; } static void probe_header(void) { if (octx.print_header) octx.print_header(); probe_group_enter("root", OBJECT); } static void probe_footer(void) { if (octx.print_footer) octx.print_footer(); probe_group_leave(); } static void probe_array_header(const char *name) { if (octx.print_array_header) octx.print_array_header(name); probe_group_enter(name, ARRAY); } static void probe_array_footer(const char *name) { probe_group_leave(); if (octx.print_array_footer) octx.print_array_footer(name); } static void probe_object_header(const char *name) { if (octx.print_object_header) octx.print_object_header(name); probe_group_enter(name, OBJECT); } static void probe_object_footer(const char *name) { probe_group_leave(); if (octx.print_object_footer) octx.print_object_footer(name); } static void probe_int(const char *key, int64_t value) { octx.print_integer(key, value); octx.prefix[octx.level -1].nb_elems++; } static void probe_str(const char *key, const char *value) { octx.print_string(key, value); octx.prefix[octx.level -1].nb_elems++; } static void probe_dict(AVDictionary *dict, const char *name) { AVDictionaryEntry *entry = NULL; if (!dict) return; probe_object_header(name); while ((entry = av_dict_get(dict, "", entry, AV_DICT_IGNORE_SUFFIX))) { probe_str(entry->key, entry->value); } probe_object_footer(name); } static char *value_string(char *buf, int buf_size, double val, const char *unit) { if (unit == unit_second_str && use_value_sexagesimal_format) { double secs; int hours, mins; secs = val; mins = (int)secs / 60; secs = secs - mins * 60; hours = mins / 60; mins %= 60; snprintf(buf, buf_size, "%d:%02d:%09.6f", hours, mins, secs); } else if (use_value_prefix) { const char *prefix_string; int index; if (unit == unit_byte_str && use_byte_value_binary_prefix) { index = (int) log2(val) / 10; index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) - 1); val /= pow(2, index * 10); prefix_string = binary_unit_prefixes[index]; } else { index = (int) (log10(val)) / 3; index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) - 1); val /= pow(10, index * 3); prefix_string = decimal_unit_prefixes[index]; } snprintf(buf, buf_size, "%.*f%s%s", index ? 3 : 0, val, prefix_string, show_value_unit ? unit : ""); } else { snprintf(buf, buf_size, "%f%s", val, show_value_unit ? unit : ""); } return buf; } static char *time_value_string(char *buf, int buf_size, int64_t val, const AVRational *time_base) { if (val == AV_NOPTS_VALUE) { snprintf(buf, buf_size, "N/A"); } else { value_string(buf, buf_size, val * av_q2d(*time_base), unit_second_str); } return buf; } static char *ts_value_string(char *buf, int buf_size, int64_t ts) { if (ts == AV_NOPTS_VALUE) { snprintf(buf, buf_size, "N/A"); } else { snprintf(buf, buf_size, "%"PRId64, ts); } return buf; } static char *rational_string(char *buf, int buf_size, const char *sep, const AVRational *rat) { snprintf(buf, buf_size, "%d%s%d", rat->num, sep, rat->den); return buf; } static char *tag_string(char *buf, int buf_size, int tag) { snprintf(buf, buf_size, "0x%04x", tag); return buf; } static const char *media_type_string(enum AVMediaType media_type) { switch (media_type) { case AVMEDIA_TYPE_VIDEO: return "video"; case AVMEDIA_TYPE_AUDIO: return "audio"; case AVMEDIA_TYPE_DATA: return "data"; case AVMEDIA_TYPE_SUBTITLE: return "subtitle"; case AVMEDIA_TYPE_ATTACHMENT: return "attachment"; default: return "unknown"; } } static void show_packet(AVFormatContext *fmt_ctx, AVPacket *pkt) { char val_str[128]; AVStream *st = fmt_ctx->streams[pkt->stream_index]; probe_object_header("packet"); probe_str("codec_type", media_type_string(st->codec->codec_type)); probe_int("stream_index", pkt->stream_index); probe_str("pts", ts_value_string(val_str, sizeof(val_str), pkt->pts)); probe_str("pts_time", time_value_string(val_str, sizeof(val_str), pkt->pts, &st->time_base)); probe_str("dts", ts_value_string(val_str, sizeof(val_str), pkt->dts)); probe_str("dts_time", time_value_string(val_str, sizeof(val_str), pkt->dts, &st->time_base)); probe_str("duration", ts_value_string(val_str, sizeof(val_str), pkt->duration)); probe_str("duration_time", time_value_string(val_str, sizeof(val_str), pkt->duration, &st->time_base)); probe_str("size", value_string(val_str, sizeof(val_str), pkt->size, unit_byte_str)); probe_int("pos", pkt->pos); probe_str("flags", pkt->flags & AV_PKT_FLAG_KEY ? "K" : "_"); probe_object_footer("packet"); } static void show_packets(AVFormatContext *fmt_ctx) { AVPacket pkt; av_init_packet(&pkt); probe_array_header("packets"); while (!av_read_frame(fmt_ctx, &pkt)) show_packet(fmt_ctx, &pkt); probe_array_footer("packets"); } static void show_stream(AVFormatContext *fmt_ctx, int stream_idx) { AVStream *stream = fmt_ctx->streams[stream_idx]; AVCodecContext *dec_ctx; const AVCodec *dec; const char *profile; char val_str[128]; AVRational display_aspect_ratio, *sar = NULL; const AVPixFmtDescriptor *desc; probe_object_header("stream"); probe_int("index", stream->index); if ((dec_ctx = stream->codec)) { if ((dec = dec_ctx->codec)) { probe_str("codec_name", dec->name); probe_str("codec_long_name", dec->long_name); } else { probe_str("codec_name", "unknown"); } probe_str("codec_type", media_type_string(dec_ctx->codec_type)); probe_str("codec_time_base", rational_string(val_str, sizeof(val_str), "/", &dec_ctx->time_base)); /* print AVI/FourCC tag */ av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag); probe_str("codec_tag_string", val_str); probe_str("codec_tag", tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag)); /* print profile, if there is one */ if (dec && (profile = av_get_profile_name(dec, dec_ctx->profile))) probe_str("profile", profile); switch (dec_ctx->codec_type) { case AVMEDIA_TYPE_VIDEO: probe_int("width", dec_ctx->width); probe_int("height", dec_ctx->height); probe_int("has_b_frames", dec_ctx->has_b_frames); if (dec_ctx->sample_aspect_ratio.num) sar = &dec_ctx->sample_aspect_ratio; else if (stream->sample_aspect_ratio.num) sar = &stream->sample_aspect_ratio; if (sar) { probe_str("sample_aspect_ratio", rational_string(val_str, sizeof(val_str), ":", sar)); av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den, dec_ctx->width * sar->num, dec_ctx->height * sar->den, 1024*1024); probe_str("display_aspect_ratio", rational_string(val_str, sizeof(val_str), ":", &display_aspect_ratio)); } desc = av_pix_fmt_desc_get(dec_ctx->pix_fmt); probe_str("pix_fmt", desc ? desc->name : "unknown"); probe_int("level", dec_ctx->level); break; case AVMEDIA_TYPE_AUDIO: probe_str("sample_rate", value_string(val_str, sizeof(val_str), dec_ctx->sample_rate, unit_hertz_str)); probe_int("channels", dec_ctx->channels); probe_int("bits_per_sample", av_get_bits_per_sample(dec_ctx->codec_id)); break; } } else { probe_str("codec_type", "unknown"); } if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS) probe_int("id", stream->id); probe_str("avg_frame_rate", rational_string(val_str, sizeof(val_str), "/", &stream->avg_frame_rate)); if (dec_ctx->bit_rate) probe_str("bit_rate", value_string(val_str, sizeof(val_str), dec_ctx->bit_rate, unit_bit_per_second_str)); probe_str("time_base", rational_string(val_str, sizeof(val_str), "/", &stream->time_base)); probe_str("start_time", time_value_string(val_str, sizeof(val_str), stream->start_time, &stream->time_base)); probe_str("duration", time_value_string(val_str, sizeof(val_str), stream->duration, &stream->time_base)); if (stream->nb_frames) probe_int("nb_frames", stream->nb_frames); probe_dict(stream->metadata, "tags"); probe_object_footer("stream"); } static void show_format(AVFormatContext *fmt_ctx) { char val_str[128]; int64_t size = fmt_ctx->pb ? avio_size(fmt_ctx->pb) : -1; probe_object_header("format"); probe_str("filename", fmt_ctx->filename); probe_int("nb_streams", fmt_ctx->nb_streams); probe_str("format_name", fmt_ctx->iformat->name); probe_str("format_long_name", fmt_ctx->iformat->long_name); probe_str("start_time", time_value_string(val_str, sizeof(val_str), fmt_ctx->start_time, &AV_TIME_BASE_Q)); probe_str("duration", time_value_string(val_str, sizeof(val_str), fmt_ctx->duration, &AV_TIME_BASE_Q)); probe_str("size", size >= 0 ? value_string(val_str, sizeof(val_str), size, unit_byte_str) : "unknown"); probe_str("bit_rate", value_string(val_str, sizeof(val_str), fmt_ctx->bit_rate, unit_bit_per_second_str)); probe_dict(fmt_ctx->metadata, "tags"); probe_object_footer("format"); } static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename) { int err, i; AVFormatContext *fmt_ctx = NULL; AVDictionaryEntry *t; if ((err = avformat_open_input(&fmt_ctx, filename, iformat, &format_opts)) < 0) { print_error(filename, err); return err; } if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) { av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key); return AVERROR_OPTION_NOT_FOUND; } /* fill the streams in the format context */ if ((err = avformat_find_stream_info(fmt_ctx, NULL)) < 0) { print_error(filename, err); return err; } av_dump_format(fmt_ctx, 0, filename, 0); /* bind a decoder to each input stream */ for (i = 0; i < fmt_ctx->nb_streams; i++) { AVStream *stream = fmt_ctx->streams[i]; AVCodec *codec; if (stream->codec->codec_id == AV_CODEC_ID_PROBE) { fprintf(stderr, "Failed to probe codec for input stream %d\n", stream->index); } else if (!(codec = avcodec_find_decoder(stream->codec->codec_id))) { fprintf(stderr, "Unsupported codec with id %d for input stream %d\n", stream->codec->codec_id, stream->index); } else if (avcodec_open2(stream->codec, codec, NULL) < 0) { fprintf(stderr, "Error while opening codec for input stream %d\n", stream->index); } } *fmt_ctx_ptr = fmt_ctx; return 0; } static void close_input_file(AVFormatContext **ctx_ptr) { int i; AVFormatContext *fmt_ctx = *ctx_ptr; /* close decoder for each stream */ for (i = 0; i < fmt_ctx->nb_streams; i++) { AVStream *stream = fmt_ctx->streams[i]; avcodec_close(stream->codec); } avformat_close_input(ctx_ptr); } static int probe_file(const char *filename) { AVFormatContext *fmt_ctx; int ret, i; if ((ret = open_input_file(&fmt_ctx, filename))) return ret; if (do_show_format) show_format(fmt_ctx); if (do_show_streams) { probe_array_header("streams"); for (i = 0; i < fmt_ctx->nb_streams; i++) show_stream(fmt_ctx, i); probe_array_footer("streams"); } if (do_show_packets) show_packets(fmt_ctx); close_input_file(&fmt_ctx); return 0; } static void show_usage(void) { printf("Simple multimedia streams analyzer\n"); printf("usage: %s [OPTIONS] [INPUT_FILE]\n", program_name); printf("\n"); } static int opt_format(void *optctx, const char *opt, const char *arg) { iformat = av_find_input_format(arg); if (!iformat) { fprintf(stderr, "Unknown input format: %s\n", arg); return AVERROR(EINVAL); } return 0; } static int opt_output_format(void *optctx, const char *opt, const char *arg) { if (!strcmp(arg, "json")) { octx.print_header = json_print_header; octx.print_footer = json_print_footer; octx.print_array_header = json_print_array_header; octx.print_array_footer = json_print_array_footer; octx.print_object_header = json_print_object_header; octx.print_object_footer = json_print_object_footer; octx.print_integer = json_print_integer; octx.print_string = json_print_string; } else if (!strcmp(arg, "ini")) { octx.print_header = ini_print_header; octx.print_footer = ini_print_footer; octx.print_array_header = ini_print_array_header; octx.print_object_header = ini_print_object_header; octx.print_integer = ini_print_integer; octx.print_string = ini_print_string; } else if (!strcmp(arg, "old")) { octx.print_header = NULL; octx.print_object_header = old_print_object_header; octx.print_object_footer = old_print_object_footer; octx.print_string = old_print_string; } else { av_log(NULL, AV_LOG_ERROR, "Unsupported formatter %s\n", arg); return AVERROR(EINVAL); } return 0; } static int opt_show_format_entry(void *optctx, const char *opt, const char *arg) { do_show_format = 1; nb_fmt_entries_to_show++; octx.print_header = NULL; octx.print_footer = NULL; octx.print_array_header = NULL; octx.print_array_footer = NULL; octx.print_object_header = NULL; octx.print_object_footer = NULL; octx.print_integer = show_format_entry_integer; octx.print_string = show_format_entry_string; av_dict_set(&fmt_entries_to_show, arg, "", 0); return 0; } static void opt_input_file(void *optctx, const char *arg) { if (input_filename) { fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n", arg, input_filename); exit(1); } if (!strcmp(arg, "-")) arg = "pipe:"; input_filename = arg; } void show_help_default(const char *opt, const char *arg) { av_log_set_callback(log_callback_help); show_usage(); show_help_options(options, "Main options:", 0, 0, 0); printf("\n"); show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM); } static int opt_pretty(void *optctx, const char *opt, const char *arg) { show_value_unit = 1; use_value_prefix = 1; use_byte_value_binary_prefix = 1; use_value_sexagesimal_format = 1; return 0; } static const OptionDef real_options[] = { #include "cmdutils_common_opts.h" { "f", HAS_ARG, {.func_arg = opt_format}, "force format", "format" }, { "of", HAS_ARG, {.func_arg = opt_output_format}, "output the document either as ini or json", "output_format" }, { "unit", OPT_BOOL, {&show_value_unit}, "show unit of the displayed values" }, { "prefix", OPT_BOOL, {&use_value_prefix}, "use SI prefixes for the displayed values" }, { "byte_binary_prefix", OPT_BOOL, {&use_byte_value_binary_prefix}, "use binary prefixes for byte units" }, { "sexagesimal", OPT_BOOL, {&use_value_sexagesimal_format}, "use sexagesimal format HOURS:MM:SS.MICROSECONDS for time units" }, { "pretty", 0, {.func_arg = opt_pretty}, "prettify the format of displayed values, make it more human readable" }, { "show_format", OPT_BOOL, {&do_show_format} , "show format/container info" }, { "show_format_entry", HAS_ARG, {.func_arg = opt_show_format_entry}, "show a particular entry from the format/container info", "entry" }, { "show_packets", OPT_BOOL, {&do_show_packets}, "show packets info" }, { "show_streams", OPT_BOOL, {&do_show_streams}, "show streams info" }, { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {.func_arg = opt_default}, "generic catch all option", "" }, { NULL, }, }; static int probe_buf_write(void *opaque, uint8_t *buf, int buf_size) { printf("%.*s", buf_size, buf); return 0; } #define AVP_BUFFSIZE 4096 int main(int argc, char **argv) { int ret; uint8_t *buffer = av_malloc(AVP_BUFFSIZE); if (!buffer) exit(1); atexit(exit_program); options = real_options; parse_loglevel(argc, argv, options); av_register_all(); avformat_network_init(); init_opts(); #if CONFIG_AVDEVICE avdevice_register_all(); #endif show_banner(); octx.print_header = ini_print_header; octx.print_footer = ini_print_footer; octx.print_array_header = ini_print_array_header; octx.print_object_header = ini_print_object_header; octx.print_integer = ini_print_integer; octx.print_string = ini_print_string; parse_options(NULL, argc, argv, options, opt_input_file); if (!input_filename) { show_usage(); fprintf(stderr, "You have to specify one input file.\n"); fprintf(stderr, "Use -h to get full help or, even better, run 'man %s'.\n", program_name); exit(1); } probe_out = avio_alloc_context(buffer, AVP_BUFFSIZE, 1, NULL, NULL, probe_buf_write, NULL); if (!probe_out) exit(1); probe_header(); ret = probe_file(input_filename); probe_footer(); avio_flush(probe_out); avio_close(probe_out); avformat_network_deinit(); return ret; }