/* * Copyright (c) 2007-2010 Stefano Sabatini * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * simple media prober based on the FFmpeg libraries */ #include "config.h" #include "libavformat/avformat.h" #include "libavcodec/avcodec.h" #include "libavutil/avstring.h" #include "libavutil/opt.h" #include "libavutil/pixdesc.h" #include "libavutil/dict.h" #include "libavdevice/avdevice.h" #include "cmdutils.h" const char program_name[] = "ffprobe"; const int program_birth_year = 2007; static int do_show_error = 0; static int do_show_format = 0; static int do_show_frames = 0; 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; static int show_private_data = 1; static char *print_format; static const OptionDef options[]; /* FFprobe context */ static const char *input_filename; static AVInputFormat *iformat = NULL; static const char *binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" }; static const char *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"; void av_noreturn exit_program(int ret) { exit(ret); } struct unit_value { union { double d; int i; } val; const char *unit; }; static char *value_string(char *buf, int buf_size, struct unit_value uv) { double vald; int show_float = 0; if (uv.unit == unit_second_str) { vald = uv.val.d; show_float = 1; } else { vald = uv.val.i; } if (uv.unit == unit_second_str && use_value_sexagesimal_format) { double secs; int hours, mins; secs = vald; 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, l; if (uv.unit == unit_byte_str && use_byte_value_binary_prefix) { index = (int) (log(vald)/log(2)) / 10; index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) -1); vald /= pow(2, index*10); prefix_string = binary_unit_prefixes[index]; } else { index = (int) (log10(vald)) / 3; index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) -1); vald /= pow(10, index*3); prefix_string = decimal_unit_prefixes[index]; } if (show_float || vald != (int)vald) l = snprintf(buf, buf_size, "%.3f", vald); else l = snprintf(buf, buf_size, "%d", (int)vald); snprintf(buf+l, buf_size-l, "%s%s%s", prefix_string || show_value_unit ? " " : "", prefix_string, show_value_unit ? uv.unit : ""); } else { int l; if (show_float) l = snprintf(buf, buf_size, "%.3f", vald); else l = snprintf(buf, buf_size, "%d", (int)vald); snprintf(buf+l, buf_size-l, "%s%s", show_value_unit ? " " : "", show_value_unit ? uv.unit : ""); } return buf; } /* WRITERS API */ typedef struct WriterContext WriterContext; #define WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS 1 #define WRITER_FLAG_PUT_PACKETS_AND_FRAMES_IN_SAME_CHAPTER 2 typedef struct Writer { int priv_size; ///< private size for the writer context const char *name; int (*init) (WriterContext *wctx, const char *args, void *opaque); void (*uninit)(WriterContext *wctx); void (*print_header)(WriterContext *ctx); void (*print_footer)(WriterContext *ctx); void (*print_chapter_header)(WriterContext *wctx, const char *); void (*print_chapter_footer)(WriterContext *wctx, const char *); void (*print_section_header)(WriterContext *wctx, const char *); void (*print_section_footer)(WriterContext *wctx, const char *); void (*print_integer) (WriterContext *wctx, const char *, long long int); void (*print_string) (WriterContext *wctx, const char *, const char *); void (*show_tags) (WriterContext *wctx, AVDictionary *dict); int flags; ///< a combination or WRITER_FLAG_* } Writer; struct WriterContext { const AVClass *class; ///< class of the writer const Writer *writer; ///< the Writer of which this is an instance char *name; ///< name of this writer instance void *priv; ///< private data for use by the filter unsigned int nb_item; ///< number of the item printed in the given section, starting at 0 unsigned int nb_section; ///< number of the section printed in the given section sequence, starting at 0 unsigned int nb_chapter; ///< number of the chapter, starting at 0 }; static const char *writer_get_name(void *p) { WriterContext *wctx = p; return wctx->writer->name; } static const AVClass writer_class = { "Writer", writer_get_name, NULL, LIBAVUTIL_VERSION_INT, }; static void writer_close(WriterContext **wctx) { if (!*wctx) return; if ((*wctx)->writer->uninit) (*wctx)->writer->uninit(*wctx); av_freep(&((*wctx)->priv)); av_freep(wctx); } static int writer_open(WriterContext **wctx, const Writer *writer, const char *args, void *opaque) { int ret = 0; if (!(*wctx = av_malloc(sizeof(WriterContext)))) { ret = AVERROR(ENOMEM); goto fail; } if (!((*wctx)->priv = av_mallocz(writer->priv_size))) { ret = AVERROR(ENOMEM); goto fail; } (*wctx)->class = &writer_class; (*wctx)->writer = writer; if ((*wctx)->writer->init) ret = (*wctx)->writer->init(*wctx, args, opaque); if (ret < 0) goto fail; return 0; fail: writer_close(wctx); return ret; } static inline void writer_print_header(WriterContext *wctx) { if (wctx->writer->print_header) wctx->writer->print_header(wctx); wctx->nb_chapter = 0; } static inline void writer_print_footer(WriterContext *wctx) { if (wctx->writer->print_footer) wctx->writer->print_footer(wctx); } static inline void writer_print_chapter_header(WriterContext *wctx, const char *header) { if (wctx->writer->print_chapter_header) wctx->writer->print_chapter_header(wctx, header); wctx->nb_section = 0; } static inline void writer_print_chapter_footer(WriterContext *wctx, const char *footer) { if (wctx->writer->print_chapter_footer) wctx->writer->print_chapter_footer(wctx, footer); wctx->nb_chapter++; } static inline void writer_print_section_header(WriterContext *wctx, const char *header) { if (wctx->writer->print_section_header) wctx->writer->print_section_header(wctx, header); wctx->nb_item = 0; } static inline void writer_print_section_footer(WriterContext *wctx, const char *footer) { if (wctx->writer->print_section_footer) wctx->writer->print_section_footer(wctx, footer); wctx->nb_section++; } static inline void writer_print_integer(WriterContext *wctx, const char *key, long long int val) { wctx->writer->print_integer(wctx, key, val); wctx->nb_item++; } static inline void writer_print_string(WriterContext *wctx, const char *key, const char *val, int opt) { if (opt && !(wctx->writer->flags & WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS)) return; wctx->writer->print_string(wctx, key, val); wctx->nb_item++; } static void writer_print_time(WriterContext *wctx, const char *key, int64_t ts, const AVRational *time_base) { char buf[128]; if (ts == AV_NOPTS_VALUE) { writer_print_string(wctx, key, "N/A", 1); } else { double d = ts * av_q2d(*time_base); value_string(buf, sizeof(buf), (struct unit_value){.val.d=d, .unit=unit_second_str}); writer_print_string(wctx, key, buf, 0); } } static void writer_print_ts(WriterContext *wctx, const char *key, int64_t ts) { if (ts == AV_NOPTS_VALUE) { writer_print_string(wctx, key, "N/A", 1); } else { writer_print_integer(wctx, key, ts); } } static inline void writer_show_tags(WriterContext *wctx, AVDictionary *dict) { wctx->writer->show_tags(wctx, dict); } #define MAX_REGISTERED_WRITERS_NB 64 static const Writer *registered_writers[MAX_REGISTERED_WRITERS_NB + 1]; static int writer_register(const Writer *writer) { static int next_registered_writer_idx = 0; if (next_registered_writer_idx == MAX_REGISTERED_WRITERS_NB) return AVERROR(ENOMEM); registered_writers[next_registered_writer_idx++] = writer; return 0; } static const Writer *writer_get_by_name(const char *name) { int i; for (i = 0; registered_writers[i]; i++) if (!strcmp(registered_writers[i]->name, name)) return registered_writers[i]; return NULL; } /* Print helpers */ struct print_buf { char *s; int len; }; static char *fast_asprintf(struct print_buf *pbuf, const char *fmt, ...) { va_list va; int len; va_start(va, fmt); len = vsnprintf(NULL, 0, fmt, va); va_end(va); if (len < 0) goto fail; if (pbuf->len < len) { char *p = av_realloc(pbuf->s, len + 1); if (!p) goto fail; pbuf->s = p; pbuf->len = len; } va_start(va, fmt); len = vsnprintf(pbuf->s, len + 1, fmt, va); va_end(va); if (len < 0) goto fail; return pbuf->s; fail: av_freep(&pbuf->s); pbuf->len = 0; return NULL; } #define ESCAPE_INIT_BUF_SIZE 256 #define ESCAPE_CHECK_SIZE(src, size, max_size) \ if (size > max_size) { \ char buf[64]; \ snprintf(buf, sizeof(buf), "%s", src); \ av_log(log_ctx, AV_LOG_WARNING, \ "String '%s...' with is too big\n", buf); \ return "FFPROBE_TOO_BIG_STRING"; \ } #define ESCAPE_REALLOC_BUF(dst_size_p, dst_p, src, size) \ if (*dst_size_p < size) { \ char *q = av_realloc(*dst_p, size); \ if (!q) { \ char buf[64]; \ snprintf(buf, sizeof(buf), "%s", src); \ av_log(log_ctx, AV_LOG_WARNING, \ "String '%s...' could not be escaped\n", buf); \ return "FFPROBE_THIS_STRING_COULD_NOT_BE_ESCAPED"; \ } \ *dst_size_p = size; \ *dst = q; \ } /* WRITERS */ /* Default output */ static void default_print_footer(WriterContext *wctx) { printf("\n"); } static void default_print_chapter_header(WriterContext *wctx, const char *chapter) { if (wctx->nb_chapter) printf("\n"); } /* lame uppercasing routine, assumes the string is lower case ASCII */ static inline char *upcase_string(char *dst, size_t dst_size, const char *src) { int i; for (i = 0; src[i] && i < dst_size-1; i++) dst[i] = src[i]-32; dst[i] = 0; return dst; } static void default_print_section_header(WriterContext *wctx, const char *section) { char buf[32]; if (wctx->nb_section) printf("\n"); printf("[%s]\n", upcase_string(buf, sizeof(buf), section)); } static void default_print_section_footer(WriterContext *wctx, const char *section) { char buf[32]; printf("[/%s]", upcase_string(buf, sizeof(buf), section)); } static void default_print_str(WriterContext *wctx, const char *key, const char *value) { printf("%s=%s\n", key, value); } static void default_print_int(WriterContext *wctx, const char *key, long long int value) { printf("%s=%lld\n", key, value); } static void default_show_tags(WriterContext *wctx, AVDictionary *dict) { AVDictionaryEntry *tag = NULL; while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) { printf("TAG:"); writer_print_string(wctx, tag->key, tag->value, 0); } } static const Writer default_writer = { .name = "default", .print_footer = default_print_footer, .print_chapter_header = default_print_chapter_header, .print_section_header = default_print_section_header, .print_section_footer = default_print_section_footer, .print_integer = default_print_int, .print_string = default_print_str, .show_tags = default_show_tags, .flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS, }; /* Compact output */ /** * Escape \n, \r, \\ and sep characters contained in s, and print the * resulting string. */ static const char *c_escape_str(char **dst, size_t *dst_size, const char *src, const char sep, void *log_ctx) { const char *p; char *q; size_t size = 1; /* precompute size */ for (p = src; *p; p++, size++) { ESCAPE_CHECK_SIZE(src, size, SIZE_MAX-2); if (*p == '\n' || *p == '\r' || *p == '\\') size++; } ESCAPE_REALLOC_BUF(dst_size, dst, src, size); q = *dst; for (p = src; *p; p++) { switch (*src) { case '\n': *q++ = '\\'; *q++ = 'n'; break; case '\r': *q++ = '\\'; *q++ = 'r'; break; case '\\': *q++ = '\\'; *q++ = '\\'; break; default: if (*p == sep) *q++ = '\\'; *q++ = *p; } } *q = 0; return *dst; } /** * Quote fields containing special characters, check RFC4180. */ static const char *csv_escape_str(char **dst, size_t *dst_size, const char *src, const char sep, void *log_ctx) { const char *p; char *q; size_t size = 1; int quote = 0; /* precompute size */ for (p = src; *p; p++, size++) { ESCAPE_CHECK_SIZE(src, size, SIZE_MAX-4); if (*p == '"' || *p == sep || *p == '\n' || *p == '\r') if (!quote) { quote = 1; size += 2; } if (*p == '"') size++; } ESCAPE_REALLOC_BUF(dst_size, dst, src, size); q = *dst; p = src; if (quote) *q++ = '\"'; while (*p) { if (*p == '"') *q++ = '\"'; *q++ = *p++; } if (quote) *q++ = '\"'; *q = 0; return *dst; } static const char *none_escape_str(char **dst, size_t *dst_size, const char *src, const char sep, void *log_ctx) { return src; } typedef struct CompactContext { const AVClass *class; char *item_sep_str; char item_sep; int nokey; char *buf; size_t buf_size; char *escape_mode_str; const char * (*escape_str)(char **dst, size_t *dst_size, const char *src, const char sep, void *log_ctx); } CompactContext; #define OFFSET(x) offsetof(CompactContext, x) static const AVOption compact_options[]= { {"item_sep", "set item separator", OFFSET(item_sep_str), AV_OPT_TYPE_STRING, {.str="|"}, CHAR_MIN, CHAR_MAX }, {"s", "set item separator", OFFSET(item_sep_str), AV_OPT_TYPE_STRING, {.str="|"}, CHAR_MIN, CHAR_MAX }, {"nokey", "force no key printing", OFFSET(nokey), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 }, {"nk", "force no key printing", OFFSET(nokey), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 }, {"escape", "set escape mode", OFFSET(escape_mode_str), AV_OPT_TYPE_STRING, {.str="c"}, CHAR_MIN, CHAR_MAX }, {"e", "set escape mode", OFFSET(escape_mode_str), AV_OPT_TYPE_STRING, {.str="c"}, CHAR_MIN, CHAR_MAX }, {NULL}, }; static const char *compact_get_name(void *ctx) { return "compact"; } static const AVClass compact_class = { "CompactContext", compact_get_name, compact_options }; static av_cold int compact_init(WriterContext *wctx, const char *args, void *opaque) { CompactContext *compact = wctx->priv; int err; compact->class = &compact_class; av_opt_set_defaults(compact); if (args && (err = (av_set_options_string(compact, args, "=", ":"))) < 0) { av_log(wctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args); return err; } if (strlen(compact->item_sep_str) != 1) { av_log(wctx, AV_LOG_ERROR, "Item separator '%s' specified, but must contain a single character\n", compact->item_sep_str); return AVERROR(EINVAL); } compact->item_sep = compact->item_sep_str[0]; compact->buf_size = ESCAPE_INIT_BUF_SIZE; if (!(compact->buf = av_malloc(compact->buf_size))) return AVERROR(ENOMEM); if (!strcmp(compact->escape_mode_str, "none")) compact->escape_str = none_escape_str; else if (!strcmp(compact->escape_mode_str, "c" )) compact->escape_str = c_escape_str; else if (!strcmp(compact->escape_mode_str, "csv" )) compact->escape_str = csv_escape_str; else { av_log(wctx, AV_LOG_ERROR, "Unknown escape mode '%s'\n", compact->escape_mode_str); return AVERROR(EINVAL); } return 0; } static av_cold void compact_uninit(WriterContext *wctx) { CompactContext *compact = wctx->priv; av_freep(&compact->item_sep_str); av_freep(&compact->buf); av_freep(&compact->escape_mode_str); } static void compact_print_section_header(WriterContext *wctx, const char *section) { CompactContext *compact = wctx->priv; printf("%s%c", section, compact->item_sep); } static void compact_print_section_footer(WriterContext *wctx, const char *section) { printf("\n"); } static void compact_print_str(WriterContext *wctx, const char *key, const char *value) { CompactContext *compact = wctx->priv; if (wctx->nb_item) printf("%c", compact->item_sep); if (!compact->nokey) printf("%s=", key); printf("%s", compact->escape_str(&compact->buf, &compact->buf_size, value, compact->item_sep, wctx)); } static void compact_print_int(WriterContext *wctx, const char *key, long long int value) { CompactContext *compact = wctx->priv; if (wctx->nb_item) printf("%c", compact->item_sep); if (!compact->nokey) printf("%s=", key); printf("%lld", value); } static void compact_show_tags(WriterContext *wctx, AVDictionary *dict) { CompactContext *compact = wctx->priv; AVDictionaryEntry *tag = NULL; while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) { if (wctx->nb_item) printf("%c", compact->item_sep); if (!compact->nokey) printf("tag:%s=", compact->escape_str(&compact->buf, &compact->buf_size, tag->key, compact->item_sep, wctx)); printf("%s", compact->escape_str(&compact->buf, &compact->buf_size, tag->value, compact->item_sep, wctx)); } } static const Writer compact_writer = { .name = "compact", .priv_size = sizeof(CompactContext), .init = compact_init, .uninit = compact_uninit, .print_section_header = compact_print_section_header, .print_section_footer = compact_print_section_footer, .print_integer = compact_print_int, .print_string = compact_print_str, .show_tags = compact_show_tags, .flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS, }; /* CSV output */ static av_cold int csv_init(WriterContext *wctx, const char *args, void *opaque) { return compact_init(wctx, "item_sep=,:nokey=1:escape=csv", opaque); } static const Writer csv_writer = { .name = "csv", .priv_size = sizeof(CompactContext), .init = csv_init, .uninit = compact_uninit, .print_section_header = compact_print_section_header, .print_section_footer = compact_print_section_footer, .print_integer = compact_print_int, .print_string = compact_print_str, .show_tags = compact_show_tags, .flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS, }; /* JSON output */ typedef struct { int multiple_entries; ///< tells if the given chapter requires multiple entries char *buf; size_t buf_size; int print_packets_and_frames; } JSONContext; static av_cold int json_init(WriterContext *wctx, const char *args, void *opaque) { JSONContext *json = wctx->priv; json->buf_size = ESCAPE_INIT_BUF_SIZE; if (!(json->buf = av_malloc(json->buf_size))) return AVERROR(ENOMEM); return 0; } static av_cold void json_uninit(WriterContext *wctx) { JSONContext *json = wctx->priv; av_freep(&json->buf); } static const char *json_escape_str(char **dst, size_t *dst_size, const char *src, void *log_ctx) { static const char json_escape[] = {'"', '\\', '\b', '\f', '\n', '\r', '\t', 0}; static const char json_subst[] = {'"', '\\', 'b', 'f', 'n', 'r', 't', 0}; const char *p; char *q; size_t size = 1; // compute the length of the escaped string for (p = src; *p; p++) { ESCAPE_CHECK_SIZE(src, size, SIZE_MAX-6); if (strchr(json_escape, *p)) size += 2; // simple escape else if ((unsigned char)*p < 32) size += 6; // handle non-printable chars else size += 1; // char copy } ESCAPE_REALLOC_BUF(dst_size, dst, src, size); q = *dst; for (p = src; *p; p++) { char *s = strchr(json_escape, *p); if (s) { *q++ = '\\'; *q++ = json_subst[s - json_escape]; } else if ((unsigned char)*p < 32) { snprintf(q, 7, "\\u00%02x", *p & 0xff); q += 6; } else { *q++ = *p; } } *q = 0; return *dst; } static void json_print_header(WriterContext *wctx) { printf("{"); } static void json_print_footer(WriterContext *wctx) { printf("\n}\n"); } static void json_print_chapter_header(WriterContext *wctx, const char *chapter) { JSONContext *json = wctx->priv; if (wctx->nb_chapter) printf(","); json->multiple_entries = !strcmp(chapter, "packets") || !strcmp(chapter, "frames" ) || !strcmp(chapter, "packets_and_frames") || !strcmp(chapter, "streams"); printf("\n \"%s\":%s", json_escape_str(&json->buf, &json->buf_size, chapter, wctx), json->multiple_entries ? " [" : " "); json->print_packets_and_frames = !strcmp(chapter, "packets_and_frames"); } static void json_print_chapter_footer(WriterContext *wctx, const char *chapter) { JSONContext *json = wctx->priv; if (json->multiple_entries) printf("]"); } #define INDENT " " static void json_print_section_header(WriterContext *wctx, const char *section) { JSONContext *json = wctx->priv; if (wctx->nb_section) printf(","); printf("{\n"); /* this is required so the parser can distinguish between packets and frames */ if (json->print_packets_and_frames) printf(INDENT "\"type\": \"%s\",\n", section); } static void json_print_section_footer(WriterContext *wctx, const char *section) { printf("\n }"); } static inline void json_print_item_str(WriterContext *wctx, const char *key, const char *value, const char *indent) { JSONContext *json = wctx->priv; printf("%s\"%s\":", indent, json_escape_str(&json->buf, &json->buf_size, key, wctx)); printf(" \"%s\"", json_escape_str(&json->buf, &json->buf_size, value, wctx)); } static void json_print_str(WriterContext *wctx, const char *key, const char *value) { if (wctx->nb_item) printf(",\n"); json_print_item_str(wctx, key, value, INDENT); } static void json_print_int(WriterContext *wctx, const char *key, long long int value) { JSONContext *json = wctx->priv; if (wctx->nb_item) printf(",\n"); printf(INDENT "\"%s\": %lld", json_escape_str(&json->buf, &json->buf_size, key, wctx), value); } static void json_show_tags(WriterContext *wctx, AVDictionary *dict) { AVDictionaryEntry *tag = NULL; int is_first = 1; if (!dict) return; printf(",\n" INDENT "\"tags\": {\n"); while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) { if (is_first) is_first = 0; else printf(",\n"); json_print_item_str(wctx, tag->key, tag->value, INDENT INDENT); } printf("\n }"); } static const Writer json_writer = { .name = "json", .priv_size = sizeof(JSONContext), .init = json_init, .uninit = json_uninit, .print_header = json_print_header, .print_footer = json_print_footer, .print_chapter_header = json_print_chapter_header, .print_chapter_footer = json_print_chapter_footer, .print_section_header = json_print_section_header, .print_section_footer = json_print_section_footer, .print_integer = json_print_int, .print_string = json_print_str, .show_tags = json_show_tags, .flags = WRITER_FLAG_PUT_PACKETS_AND_FRAMES_IN_SAME_CHAPTER, }; /* XML output */ typedef struct { const AVClass *class; int within_tag; int multiple_entries; ///< tells if the given chapter requires multiple entries int indent_level; int fully_qualified; int xsd_strict; char *buf; size_t buf_size; } XMLContext; #undef OFFSET #define OFFSET(x) offsetof(XMLContext, x) static const AVOption xml_options[] = { {"fully_qualified", "specify if the output should be fully qualified", OFFSET(fully_qualified), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 }, {"q", "specify if the output should be fully qualified", OFFSET(fully_qualified), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 }, {"xsd_strict", "ensure that the output is XSD compliant", OFFSET(xsd_strict), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 }, {"x", "ensure that the output is XSD compliant", OFFSET(xsd_strict), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 }, {NULL}, }; static const char *xml_get_name(void *ctx) { return "xml"; } static const AVClass xml_class = { "XMLContext", xml_get_name, xml_options }; static av_cold int xml_init(WriterContext *wctx, const char *args, void *opaque) { XMLContext *xml = wctx->priv; int err; xml->class = &xml_class; av_opt_set_defaults(xml); if (args && (err = (av_set_options_string(xml, args, "=", ":"))) < 0) { av_log(wctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args); return err; } if (xml->xsd_strict) { xml->fully_qualified = 1; #define CHECK_COMPLIANCE(opt, opt_name) \ if (opt) { \ av_log(wctx, AV_LOG_ERROR, \ "XSD-compliant output selected but option '%s' was selected, XML output may be non-compliant.\n" \ "You need to disable such option with '-no%s'\n", opt_name, opt_name); \ return AVERROR(EINVAL); \ } CHECK_COMPLIANCE(show_private_data, "private"); CHECK_COMPLIANCE(show_value_unit, "unit"); CHECK_COMPLIANCE(use_value_prefix, "prefix"); if (do_show_frames && do_show_packets) { av_log(wctx, AV_LOG_ERROR, "Interleaved frames and packets are not allowed in XSD. " "Select only one between the -show_frames and the -show_packets options.\n"); return AVERROR(EINVAL); } } xml->buf_size = ESCAPE_INIT_BUF_SIZE; if (!(xml->buf = av_malloc(xml->buf_size))) return AVERROR(ENOMEM); return 0; } static av_cold void xml_uninit(WriterContext *wctx) { XMLContext *xml = wctx->priv; av_freep(&xml->buf); } static const char *xml_escape_str(char **dst, size_t *dst_size, const char *src, void *log_ctx) { const char *p; char *q; size_t size = 1; /* precompute size */ for (p = src; *p; p++, size++) { ESCAPE_CHECK_SIZE(src, size, SIZE_MAX-10); switch (*p) { case '&' : size += strlen("&"); break; case '<' : size += strlen("<"); break; case '>' : size += strlen(">"); break; case '\"': size += strlen("""); break; case '\'': size += strlen("'"); break; default: size++; } } ESCAPE_REALLOC_BUF(dst_size, dst, src, size); #define COPY_STR(str) { \ const char *s = str; \ while (*s) \ *q++ = *s++; \ } p = src; q = *dst; while (*p) { switch (*p) { case '&' : COPY_STR("&"); break; case '<' : COPY_STR("<"); break; case '>' : COPY_STR(">"); break; case '\"': COPY_STR("""); break; case '\'': COPY_STR("'"); break; default: *q++ = *p; } p++; } *q = 0; return *dst; } static void xml_print_header(WriterContext *wctx) { XMLContext *xml = wctx->priv; const char *qual = " xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' " "xmlns:ffprobe='http://www.ffmpeg.org/schema/ffprobe' " "xsi:schemaLocation='http://www.ffmpeg.org/schema/ffprobe ffprobe.xsd'"; printf("\n"); printf("<%sffprobe%s>\n", xml->fully_qualified ? "ffprobe:" : "", xml->fully_qualified ? qual : ""); xml->indent_level++; } static void xml_print_footer(WriterContext *wctx) { XMLContext *xml = wctx->priv; xml->indent_level--; printf("\n", xml->fully_qualified ? "ffprobe:" : ""); } #define XML_INDENT() printf("%*c", xml->indent_level * 4, ' ') static void xml_print_chapter_header(WriterContext *wctx, const char *chapter) { XMLContext *xml = wctx->priv; if (wctx->nb_chapter) printf("\n"); xml->multiple_entries = !strcmp(chapter, "packets") || !strcmp(chapter, "frames") || !strcmp(chapter, "packets_and_frames") || !strcmp(chapter, "streams"); if (xml->multiple_entries) { XML_INDENT(); printf("<%s>\n", chapter); xml->indent_level++; } } static void xml_print_chapter_footer(WriterContext *wctx, const char *chapter) { XMLContext *xml = wctx->priv; if (xml->multiple_entries) { xml->indent_level--; XML_INDENT(); printf("\n", chapter); } } static void xml_print_section_header(WriterContext *wctx, const char *section) { XMLContext *xml = wctx->priv; XML_INDENT(); printf("<%s ", section); xml->within_tag = 1; } static void xml_print_section_footer(WriterContext *wctx, const char *section) { XMLContext *xml = wctx->priv; if (xml->within_tag) printf("/>\n"); else { XML_INDENT(); printf("\n", section); } } static void xml_print_str(WriterContext *wctx, const char *key, const char *value) { XMLContext *xml = wctx->priv; if (wctx->nb_item) printf(" "); printf("%s=\"%s\"", key, xml_escape_str(&xml->buf, &xml->buf_size, value, wctx)); } static void xml_print_int(WriterContext *wctx, const char *key, long long int value) { if (wctx->nb_item) printf(" "); printf("%s=\"%lld\"", key, value); } static void xml_show_tags(WriterContext *wctx, AVDictionary *dict) { XMLContext *xml = wctx->priv; AVDictionaryEntry *tag = NULL; int is_first = 1; xml->indent_level++; while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) { if (is_first) { /* close section tag */ printf(">\n"); xml->within_tag = 0; is_first = 0; } XML_INDENT(); printf("buf, &xml->buf_size, tag->key, wctx)); printf(" value=\"%s\"/>\n", xml_escape_str(&xml->buf, &xml->buf_size, tag->value, wctx)); } xml->indent_level--; } static Writer xml_writer = { .name = "xml", .priv_size = sizeof(XMLContext), .init = xml_init, .uninit = xml_uninit, .print_header = xml_print_header, .print_footer = xml_print_footer, .print_chapter_header = xml_print_chapter_header, .print_chapter_footer = xml_print_chapter_footer, .print_section_header = xml_print_section_header, .print_section_footer = xml_print_section_footer, .print_integer = xml_print_int, .print_string = xml_print_str, .show_tags = xml_show_tags, .flags = WRITER_FLAG_PUT_PACKETS_AND_FRAMES_IN_SAME_CHAPTER, }; static void writer_register_all(void) { static int initialized; if (initialized) return; initialized = 1; writer_register(&default_writer); writer_register(&compact_writer); writer_register(&csv_writer); writer_register(&json_writer); writer_register(&xml_writer); } #define print_fmt(k, f, ...) do { \ if (fast_asprintf(&pbuf, f, __VA_ARGS__)) \ writer_print_string(w, k, pbuf.s, 0); \ } while (0) #define print_fmt_opt(k, f, ...) do { \ if (fast_asprintf(&pbuf, f, __VA_ARGS__)) \ writer_print_string(w, k, pbuf.s, 1); \ } while (0) #define print_int(k, v) writer_print_integer(w, k, v) #define print_str(k, v) writer_print_string(w, k, v, 0) #define print_str_opt(k, v) writer_print_string(w, k, v, 1) #define print_time(k, v, tb) writer_print_time(w, k, v, tb) #define print_ts(k, v) writer_print_ts(w, k, v) #define print_val(k, v, u) writer_print_string(w, k, \ value_string(val_str, sizeof(val_str), (struct unit_value){.val.i = v, .unit=u}), 0) #define print_section_header(s) writer_print_section_header(w, s) #define print_section_footer(s) writer_print_section_footer(w, s) #define show_tags(metadata) writer_show_tags(w, metadata) static void show_packet(WriterContext *w, AVFormatContext *fmt_ctx, AVPacket *pkt, int packet_idx) { char val_str[128]; AVStream *st = fmt_ctx->streams[pkt->stream_index]; struct print_buf pbuf = {.s = NULL}; const char *s; print_section_header("packet"); s = av_get_media_type_string(st->codec->codec_type); if (s) print_str ("codec_type", s); else print_str_opt("codec_type", "unknown"); print_int("stream_index", pkt->stream_index); print_ts ("pts", pkt->pts); print_time("pts_time", pkt->pts, &st->time_base); print_ts ("dts", pkt->dts); print_time("dts_time", pkt->dts, &st->time_base); print_ts ("duration", pkt->duration); print_time("duration_time", pkt->duration, &st->time_base); print_val("size", pkt->size, unit_byte_str); if (pkt->pos != -1) print_fmt ("pos", "%"PRId64, pkt->pos); else print_str_opt("pos", "N/A"); print_fmt("flags", "%c", pkt->flags & AV_PKT_FLAG_KEY ? 'K' : '_'); print_section_footer("packet"); av_free(pbuf.s); fflush(stdout); } static void show_frame(WriterContext *w, AVFrame *frame, AVStream *stream) { struct print_buf pbuf = {.s = NULL}; const char *s; print_section_header("frame"); print_str("media_type", "video"); print_int("width", frame->width); print_int("height", frame->height); s = av_get_pix_fmt_name(frame->format); if (s) print_str ("pix_fmt", s); else print_str_opt("pix_fmt", "unknown"); if (frame->sample_aspect_ratio.num) { print_fmt("sample_aspect_ratio", "%d:%d", frame->sample_aspect_ratio.num, frame->sample_aspect_ratio.den); } else { print_str_opt("sample_aspect_ratio", "N/A"); } print_fmt("pict_type", "%c", av_get_picture_type_char(frame->pict_type)); print_int("coded_picture_number", frame->coded_picture_number); print_int("display_picture_number", frame->display_picture_number); print_int("interlaced_frame", frame->interlaced_frame); print_int("top_field_first", frame->top_field_first); print_int("repeat_pict", frame->repeat_pict); print_int("reference", frame->reference); print_int("key_frame", frame->key_frame); print_ts ("pkt_pts", frame->pkt_pts); print_time("pkt_pts_time", frame->pkt_pts, &stream->time_base); print_ts ("pkt_dts", frame->pkt_dts); print_time("pkt_dts_time", frame->pkt_dts, &stream->time_base); if (frame->pkt_pos != -1) print_fmt ("pkt_pos", "%"PRId64, frame->pkt_pos); else print_str_opt("pkt_pos", "N/A"); print_section_footer("frame"); av_free(pbuf.s); fflush(stdout); } static av_always_inline int get_video_frame(AVFormatContext *fmt_ctx, AVFrame *frame, AVPacket *pkt) { AVCodecContext *dec_ctx = fmt_ctx->streams[pkt->stream_index]->codec; int got_picture = 0; if (dec_ctx->codec_id != CODEC_ID_NONE && dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) avcodec_decode_video2(dec_ctx, frame, &got_picture, pkt); return got_picture; } static void show_packets(WriterContext *w, AVFormatContext *fmt_ctx) { AVPacket pkt; AVFrame frame; int i = 0; av_init_packet(&pkt); while (!av_read_frame(fmt_ctx, &pkt)) { if (do_show_packets) show_packet(w, fmt_ctx, &pkt, i++); if (do_show_frames && get_video_frame(fmt_ctx, &frame, &pkt)) { show_frame(w, &frame, fmt_ctx->streams[pkt.stream_index]); av_destruct_packet(&pkt); } } av_init_packet(&pkt); pkt.data = NULL; pkt.size = 0; //Flush remaining frames that are cached in the decoder for (i = 0; i < fmt_ctx->nb_streams; i++) { pkt.stream_index = i; while (get_video_frame(fmt_ctx, &frame, &pkt)) show_frame(w, &frame, fmt_ctx->streams[pkt.stream_index]); } } static void show_stream(WriterContext *w, AVFormatContext *fmt_ctx, int stream_idx) { AVStream *stream = fmt_ctx->streams[stream_idx]; AVCodecContext *dec_ctx; AVCodec *dec; char val_str[128]; const char *s; AVRational display_aspect_ratio; struct print_buf pbuf = {.s = NULL}; print_section_header("stream"); print_int("index", stream->index); if ((dec_ctx = stream->codec)) { if ((dec = dec_ctx->codec)) { print_str("codec_name", dec->name); print_str("codec_long_name", dec->long_name); } else { print_str_opt("codec_name", "unknown"); print_str_opt("codec_long_name", "unknown"); } s = av_get_media_type_string(dec_ctx->codec_type); if (s) print_str ("codec_type", s); else print_str_opt("codec_type", "unknown"); print_fmt("codec_time_base", "%d/%d", dec_ctx->time_base.num, dec_ctx->time_base.den); /* print AVI/FourCC tag */ av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag); print_str("codec_tag_string", val_str); print_fmt("codec_tag", "0x%04x", dec_ctx->codec_tag); switch (dec_ctx->codec_type) { case AVMEDIA_TYPE_VIDEO: print_int("width", dec_ctx->width); print_int("height", dec_ctx->height); print_int("has_b_frames", dec_ctx->has_b_frames); if (dec_ctx->sample_aspect_ratio.num) { print_fmt("sample_aspect_ratio", "%d:%d", dec_ctx->sample_aspect_ratio.num, dec_ctx->sample_aspect_ratio.den); av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den, dec_ctx->width * dec_ctx->sample_aspect_ratio.num, dec_ctx->height * dec_ctx->sample_aspect_ratio.den, 1024*1024); print_fmt("display_aspect_ratio", "%d:%d", display_aspect_ratio.num, display_aspect_ratio.den); } else { print_str_opt("sample_aspect_ratio", "N/A"); print_str_opt("display_aspect_ratio", "N/A"); } s = av_get_pix_fmt_name(dec_ctx->pix_fmt); if (s) print_str ("pix_fmt", s); else print_str_opt("pix_fmt", "unknown"); print_int("level", dec_ctx->level); if (dec_ctx->timecode_frame_start >= 0) { uint32_t tc = dec_ctx->timecode_frame_start; print_fmt("timecode", "%02d:%02d:%02d%c%02d", tc>>19 & 0x1f, // hours tc>>13 & 0x3f, // minutes tc>>6 & 0x3f, // seconds tc & 1<<24 ? ';' : ':', // drop tc & 0x3f); // frames } else { print_str_opt("timecode", "N/A"); } break; case AVMEDIA_TYPE_AUDIO: s = av_get_sample_fmt_name(dec_ctx->sample_fmt); if (s) print_str ("sample_fmt", s); else print_str_opt("sample_fmt", "unknown"); print_val("sample_rate", dec_ctx->sample_rate, unit_hertz_str); print_int("channels", dec_ctx->channels); print_int("bits_per_sample", av_get_bits_per_sample(dec_ctx->codec_id)); break; } } else { print_str_opt("codec_type", "unknown"); } if (dec_ctx->codec && dec_ctx->codec->priv_class && show_private_data) { const AVOption *opt = NULL; while (opt = av_opt_next(dec_ctx->priv_data,opt)) { uint8_t *str; if (opt->flags) continue; if (av_opt_get(dec_ctx->priv_data, opt->name, 0, &str) >= 0) { print_str(opt->name, str); av_free(str); } } } if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS) print_fmt ("id", "0x%x", stream->id); else print_str_opt("id", "N/A"); print_fmt("r_frame_rate", "%d/%d", stream->r_frame_rate.num, stream->r_frame_rate.den); print_fmt("avg_frame_rate", "%d/%d", stream->avg_frame_rate.num, stream->avg_frame_rate.den); print_fmt("time_base", "%d/%d", stream->time_base.num, stream->time_base.den); print_time("start_time", stream->start_time, &stream->time_base); print_time("duration", stream->duration, &stream->time_base); if (stream->nb_frames) print_fmt ("nb_frames", "%"PRId64, stream->nb_frames); else print_str_opt("nb_frames", "N/A"); show_tags(stream->metadata); print_section_footer("stream"); av_free(pbuf.s); fflush(stdout); } static void show_streams(WriterContext *w, AVFormatContext *fmt_ctx) { int i; for (i = 0; i < fmt_ctx->nb_streams; i++) show_stream(w, fmt_ctx, i); } static void show_format(WriterContext *w, AVFormatContext *fmt_ctx) { char val_str[128]; int64_t size = avio_size(fmt_ctx->pb); print_section_header("format"); print_str("filename", fmt_ctx->filename); print_int("nb_streams", fmt_ctx->nb_streams); print_str("format_name", fmt_ctx->iformat->name); print_str("format_long_name", fmt_ctx->iformat->long_name); print_time("start_time", fmt_ctx->start_time, &AV_TIME_BASE_Q); print_time("duration", fmt_ctx->duration, &AV_TIME_BASE_Q); if (size >= 0) print_val ("size", size, unit_byte_str); else print_str_opt("size", "N/A"); if (fmt_ctx->bit_rate > 0) print_val ("bit_rate", fmt_ctx->bit_rate, unit_bit_per_second_str); else print_str_opt("bit_rate", "N/A"); show_tags(fmt_ctx->metadata); print_section_footer("format"); fflush(stdout); } static void show_error(WriterContext *w, int err) { char errbuf[128]; const char *errbuf_ptr = errbuf; if (av_strerror(err, errbuf, sizeof(errbuf)) < 0) errbuf_ptr = strerror(AVUNERROR(err)); writer_print_chapter_header(w, "error"); print_section_header("error"); print_int("code", err); print_str("string", errbuf_ptr); print_section_footer("error"); writer_print_chapter_footer(w, "error"); } 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 (!(codec = avcodec_find_decoder(stream->codec->codec_id))) { av_log(NULL, AV_LOG_ERROR, "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) { av_log(NULL, AV_LOG_ERROR, "Error while opening codec for input stream %d\n", stream->index); } } *fmt_ctx_ptr = fmt_ctx; return 0; } #define PRINT_CHAPTER(name) do { \ if (do_show_ ## name) { \ writer_print_chapter_header(wctx, #name); \ show_ ## name (wctx, fmt_ctx); \ writer_print_chapter_footer(wctx, #name); \ } \ } while (0) static int probe_file(WriterContext *wctx, const char *filename) { AVFormatContext *fmt_ctx; int ret, i; ret = open_input_file(&fmt_ctx, filename); if (ret >= 0) { if (do_show_packets || do_show_frames) { const char *chapter; if (do_show_frames && do_show_packets && wctx->writer->flags & WRITER_FLAG_PUT_PACKETS_AND_FRAMES_IN_SAME_CHAPTER) chapter = "packets_and_frames"; else if (do_show_packets && !do_show_frames) chapter = "packets"; else // (!do_show_packets && do_show_frames) chapter = "frames"; writer_print_chapter_header(wctx, chapter); show_packets(wctx, fmt_ctx); writer_print_chapter_footer(wctx, chapter); } PRINT_CHAPTER(streams); PRINT_CHAPTER(format); for (i = 0; i < fmt_ctx->nb_streams; i++) if (fmt_ctx->streams[i]->codec->codec_id != CODEC_ID_NONE) avcodec_close(fmt_ctx->streams[i]->codec); avformat_close_input(&fmt_ctx); } return ret; } static void show_usage(void) { av_log(NULL, AV_LOG_INFO, "Simple multimedia streams analyzer\n"); av_log(NULL, AV_LOG_INFO, "usage: %s [OPTIONS] [INPUT_FILE]\n", program_name); av_log(NULL, AV_LOG_INFO, "\n"); } static int opt_format(const char *opt, const char *arg) { iformat = av_find_input_format(arg); if (!iformat) { av_log(NULL, AV_LOG_ERROR, "Unknown input format: %s\n", arg); return AVERROR(EINVAL); } return 0; } static void opt_input_file(void *optctx, const char *arg) { if (input_filename) { av_log(NULL, AV_LOG_ERROR, "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; } static int opt_help(const char *opt, const char *arg) { av_log_set_callback(log_callback_help); show_usage(); show_help_options(options, "Main options:\n", 0, 0); printf("\n"); show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM); return 0; } static int opt_pretty(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 options[] = { #include "cmdutils_common_opts.h" { "f", HAS_ARG, {(void*)opt_format}, "force format", "format" }, { "unit", OPT_BOOL, {(void*)&show_value_unit}, "show unit of the displayed values" }, { "prefix", OPT_BOOL, {(void*)&use_value_prefix}, "use SI prefixes for the displayed values" }, { "byte_binary_prefix", OPT_BOOL, {(void*)&use_byte_value_binary_prefix}, "use binary prefixes for byte units" }, { "sexagesimal", OPT_BOOL, {(void*)&use_value_sexagesimal_format}, "use sexagesimal format HOURS:MM:SS.MICROSECONDS for time units" }, { "pretty", 0, {(void*)&opt_pretty}, "prettify the format of displayed values, make it more human readable" }, { "print_format", OPT_STRING | HAS_ARG, {(void*)&print_format}, "set the output printing format (available formats are: default, compact, csv, json, xml)", "format" }, { "show_error", OPT_BOOL, {(void*)&do_show_error} , "show probing error" }, { "show_format", OPT_BOOL, {(void*)&do_show_format} , "show format/container info" }, { "show_frames", OPT_BOOL, {(void*)&do_show_frames} , "show frames info" }, { "show_packets", OPT_BOOL, {(void*)&do_show_packets}, "show packets info" }, { "show_streams", OPT_BOOL, {(void*)&do_show_streams}, "show streams info" }, { "show_private_data", OPT_BOOL, {(void*)&show_private_data}, "show private data" }, { "private", OPT_BOOL, {(void*)&show_private_data}, "same as show_private_data" }, { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {(void*)opt_default}, "generic catch all option", "" }, { "i", HAS_ARG, {(void *)opt_input_file}, "read specified file", "input_file"}, { NULL, }, }; int main(int argc, char **argv) { const Writer *w; WriterContext *wctx; char *buf; char *w_name = NULL, *w_args = NULL; int ret; parse_loglevel(argc, argv, options); av_register_all(); avformat_network_init(); init_opts(); #if CONFIG_AVDEVICE avdevice_register_all(); #endif show_banner(argc, argv, options); parse_options(NULL, argc, argv, options, opt_input_file); writer_register_all(); if (!print_format) print_format = av_strdup("default"); w_name = av_strtok(print_format, "=", &buf); w_args = buf; w = writer_get_by_name(w_name); if (!w) { av_log(NULL, AV_LOG_ERROR, "Unknown output format with name '%s'\n", w_name); ret = AVERROR(EINVAL); goto end; } if ((ret = writer_open(&wctx, w, w_args, NULL)) >= 0) { writer_print_header(wctx); if (!input_filename) { show_usage(); av_log(NULL, AV_LOG_ERROR, "You have to specify one input file.\n"); av_log(NULL, AV_LOG_ERROR, "Use -h to get full help or, even better, run 'man %s'.\n", program_name); ret = AVERROR(EINVAL); } else { ret = probe_file(wctx, input_filename); if (ret < 0 && do_show_error) show_error(wctx, ret); } writer_print_footer(wctx); writer_close(&wctx); } end: av_freep(&print_format); avformat_network_deinit(); return ret; }