/* * Various utilities for command line tools * Copyright (c) 2000-2003 Fabrice Bellard * * 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 <string.h> #include <stdlib.h> #include <errno.h> #include <math.h> /* Include only the enabled headers since some compilers (namely, Sun Studio) will not omit unused inline functions and create undefined references to libraries that are not being built. */ #include "config.h" #include "libavformat/avformat.h" #include "libavfilter/avfilter.h" #include "libavdevice/avdevice.h" #include "libavresample/avresample.h" #include "libswscale/swscale.h" #include "libavutil/avassert.h" #include "libavutil/avstring.h" #include "libavutil/mathematics.h" #include "libavutil/imgutils.h" #include "libavutil/parseutils.h" #include "libavutil/pixdesc.h" #include "libavutil/eval.h" #include "libavutil/dict.h" #include "libavutil/opt.h" #include "cmdutils.h" #include "version.h" #if CONFIG_NETWORK #include "libavformat/network.h" #endif #if HAVE_SYS_RESOURCE_H #include <sys/time.h> #include <sys/resource.h> #endif struct SwsContext *sws_opts; AVDictionary *format_opts, *codec_opts, *resample_opts; static const int this_year = 2013; void init_opts(void) { #if CONFIG_SWSCALE sws_opts = sws_getContext(16, 16, 0, 16, 16, 0, SWS_BICUBIC, NULL, NULL, NULL); #endif } void uninit_opts(void) { #if CONFIG_SWSCALE sws_freeContext(sws_opts); sws_opts = NULL; #endif av_dict_free(&format_opts); av_dict_free(&codec_opts); av_dict_free(&resample_opts); } void log_callback_help(void *ptr, int level, const char *fmt, va_list vl) { vfprintf(stdout, fmt, vl); } static void (*program_exit)(int ret); void register_exit(void (*cb)(int ret)) { program_exit = cb; } void exit_program(int ret) { if (program_exit) program_exit(ret); exit(ret); } double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max) { char *tail; const char *error; double d = av_strtod(numstr, &tail); if (*tail) error = "Expected number for %s but found: %s\n"; else if (d < min || d > max) error = "The value for %s was %s which is not within %f - %f\n"; else if (type == OPT_INT64 && (int64_t)d != d) error = "Expected int64 for %s but found %s\n"; else if (type == OPT_INT && (int)d != d) error = "Expected int for %s but found %s\n"; else return d; av_log(NULL, AV_LOG_FATAL, error, context, numstr, min, max); exit_program(1); return 0; } int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration) { int64_t us; if (av_parse_time(&us, timestr, is_duration) < 0) { av_log(NULL, AV_LOG_FATAL, "Invalid %s specification for %s: %s\n", is_duration ? "duration" : "date", context, timestr); exit_program(1); } return us; } void show_help_options(const OptionDef *options, const char *msg, int req_flags, int rej_flags, int alt_flags) { const OptionDef *po; int first; first = 1; for (po = options; po->name != NULL; po++) { char buf[64]; if (((po->flags & req_flags) != req_flags) || (alt_flags && !(po->flags & alt_flags)) || (po->flags & rej_flags)) continue; if (first) { printf("%s\n", msg); first = 0; } av_strlcpy(buf, po->name, sizeof(buf)); if (po->argname) { av_strlcat(buf, " ", sizeof(buf)); av_strlcat(buf, po->argname, sizeof(buf)); } printf("-%-17s %s\n", buf, po->help); } printf("\n"); } void show_help_children(const AVClass *class, int flags) { const AVClass *child = NULL; av_opt_show2(&class, NULL, flags, 0); printf("\n"); while (child = av_opt_child_class_next(class, child)) show_help_children(child, flags); } static const OptionDef *find_option(const OptionDef *po, const char *name) { const char *p = strchr(name, ':'); int len = p ? p - name : strlen(name); while (po->name != NULL) { if (!strncmp(name, po->name, len) && strlen(po->name) == len) break; po++; } return po; } #if HAVE_COMMANDLINETOARGVW #include <windows.h> #include <shellapi.h> /* Will be leaked on exit */ static char** win32_argv_utf8 = NULL; static int win32_argc = 0; /** * Prepare command line arguments for executable. * For Windows - perform wide-char to UTF-8 conversion. * Input arguments should be main() function arguments. * @param argc_ptr Arguments number (including executable) * @param argv_ptr Arguments list. */ static void prepare_app_arguments(int *argc_ptr, char ***argv_ptr) { char *argstr_flat; wchar_t **argv_w; int i, buffsize = 0, offset = 0; if (win32_argv_utf8) { *argc_ptr = win32_argc; *argv_ptr = win32_argv_utf8; return; } win32_argc = 0; argv_w = CommandLineToArgvW(GetCommandLineW(), &win32_argc); if (win32_argc <= 0 || !argv_w) return; /* determine the UTF-8 buffer size (including NULL-termination symbols) */ for (i = 0; i < win32_argc; i++) buffsize += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1, NULL, 0, NULL, NULL); win32_argv_utf8 = av_mallocz(sizeof(char *) * (win32_argc + 1) + buffsize); argstr_flat = (char *)win32_argv_utf8 + sizeof(char *) * (win32_argc + 1); if (win32_argv_utf8 == NULL) { LocalFree(argv_w); return; } for (i = 0; i < win32_argc; i++) { win32_argv_utf8[i] = &argstr_flat[offset]; offset += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1, &argstr_flat[offset], buffsize - offset, NULL, NULL); } win32_argv_utf8[i] = NULL; LocalFree(argv_w); *argc_ptr = win32_argc; *argv_ptr = win32_argv_utf8; } #else static inline void prepare_app_arguments(int *argc_ptr, char ***argv_ptr) { /* nothing to do */ } #endif /* HAVE_COMMANDLINETOARGVW */ static int write_option(void *optctx, const OptionDef *po, const char *opt, const char *arg) { /* new-style options contain an offset into optctx, old-style address of * a global var*/ void *dst = po->flags & (OPT_OFFSET | OPT_SPEC) ? (uint8_t *)optctx + po->u.off : po->u.dst_ptr; int *dstcount; if (po->flags & OPT_SPEC) { SpecifierOpt **so = dst; char *p = strchr(opt, ':'); dstcount = (int *)(so + 1); *so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1); (*so)[*dstcount - 1].specifier = av_strdup(p ? p + 1 : ""); dst = &(*so)[*dstcount - 1].u; } if (po->flags & OPT_STRING) { char *str; str = av_strdup(arg); av_freep(dst); *(char **)dst = str; } else if (po->flags & OPT_BOOL || po->flags & OPT_INT) { *(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX); } else if (po->flags & OPT_INT64) { *(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX); } else if (po->flags & OPT_TIME) { *(int64_t *)dst = parse_time_or_die(opt, arg, 1); } else if (po->flags & OPT_FLOAT) { *(float *)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY); } else if (po->flags & OPT_DOUBLE) { *(double *)dst = parse_number_or_die(opt, arg, OPT_DOUBLE, -INFINITY, INFINITY); } else if (po->u.func_arg) { int ret = po->u.func_arg(optctx, opt, arg); if (ret < 0) { av_log(NULL, AV_LOG_ERROR, "Failed to set value '%s' for option '%s'\n", arg, opt); return ret; } } if (po->flags & OPT_EXIT) exit_program(0); return 0; } int parse_option(void *optctx, const char *opt, const char *arg, const OptionDef *options) { const OptionDef *po; int ret; po = find_option(options, opt); if (!po->name && opt[0] == 'n' && opt[1] == 'o') { /* handle 'no' bool option */ po = find_option(options, opt + 2); if ((po->name && (po->flags & OPT_BOOL))) arg = "0"; } else if (po->flags & OPT_BOOL) arg = "1"; if (!po->name) po = find_option(options, "default"); if (!po->name) { av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt); return AVERROR(EINVAL); } if (po->flags & HAS_ARG && !arg) { av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt); return AVERROR(EINVAL); } ret = write_option(optctx, po, opt, arg); if (ret < 0) return ret; return !!(po->flags & HAS_ARG); } void parse_options(void *optctx, int argc, char **argv, const OptionDef *options, void (*parse_arg_function)(void *, const char*)) { const char *opt; int optindex, handleoptions = 1, ret; /* perform system-dependent conversions for arguments list */ prepare_app_arguments(&argc, &argv); /* parse options */ optindex = 1; while (optindex < argc) { opt = argv[optindex++]; if (handleoptions && opt[0] == '-' && opt[1] != '\0') { if (opt[1] == '-' && opt[2] == '\0') { handleoptions = 0; continue; } opt++; if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0) exit_program(1); optindex += ret; } else { if (parse_arg_function) parse_arg_function(optctx, opt); } } } int parse_optgroup(void *optctx, OptionGroup *g) { int i, ret; av_log(NULL, AV_LOG_DEBUG, "Parsing a group of options: %s %s.\n", g->group_def->name, g->arg); for (i = 0; i < g->nb_opts; i++) { Option *o = &g->opts[i]; if (g->group_def->flags && !(g->group_def->flags & o->opt->flags)) { av_log(NULL, AV_LOG_ERROR, "Option %s (%s) cannot be applied to " "%s %s -- you are trying to apply an input option to an " "output file or vice versa. Move this option before the " "file it belongs to.\n", o->key, o->opt->help, g->group_def->name, g->arg); return AVERROR(EINVAL); } av_log(NULL, AV_LOG_DEBUG, "Applying option %s (%s) with argument %s.\n", o->key, o->opt->help, o->val); ret = write_option(optctx, o->opt, o->key, o->val); if (ret < 0) return ret; } av_log(NULL, AV_LOG_DEBUG, "Successfully parsed a group of options.\n"); return 0; } int locate_option(int argc, char **argv, const OptionDef *options, const char *optname) { const OptionDef *po; int i; for (i = 1; i < argc; i++) { const char *cur_opt = argv[i]; if (*cur_opt++ != '-') continue; po = find_option(options, cur_opt); if (!po->name && cur_opt[0] == 'n' && cur_opt[1] == 'o') po = find_option(options, cur_opt + 2); if ((!po->name && !strcmp(cur_opt, optname)) || (po->name && !strcmp(optname, po->name))) return i; if (!po || po->flags & HAS_ARG) i++; } return 0; } void parse_loglevel(int argc, char **argv, const OptionDef *options) { int idx = locate_option(argc, argv, options, "loglevel"); if (!idx) idx = locate_option(argc, argv, options, "v"); if (idx && argv[idx + 1]) opt_loglevel(NULL, "loglevel", argv[idx + 1]); } #define FLAGS (o->type == AV_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0 int opt_default(void *optctx, const char *opt, const char *arg) { const AVOption *o; char opt_stripped[128]; const char *p; const AVClass *cc = avcodec_get_class(), *fc = avformat_get_class(); #if CONFIG_AVRESAMPLE const AVClass *rc = avresample_get_class(); #endif #if CONFIG_SWSCALE const AVClass *sc = sws_get_class(); #endif if (!(p = strchr(opt, ':'))) p = opt + strlen(opt); av_strlcpy(opt_stripped, opt, FFMIN(sizeof(opt_stripped), p - opt + 1)); if ((o = av_opt_find(&cc, opt_stripped, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) || ((opt[0] == 'v' || opt[0] == 'a' || opt[0] == 's') && (o = av_opt_find(&cc, opt + 1, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ)))) av_dict_set(&codec_opts, opt, arg, FLAGS); else if ((o = av_opt_find(&fc, opt, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) av_dict_set(&format_opts, opt, arg, FLAGS); #if CONFIG_AVRESAMPLE else if ((o = av_opt_find(&rc, opt, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) av_dict_set(&resample_opts, opt, arg, FLAGS); #endif #if CONFIG_SWSCALE else if ((o = av_opt_find(&sc, opt, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) { // XXX we only support sws_flags, not arbitrary sws options int ret = av_opt_set(sws_opts, opt, arg, 0); if (ret < 0) { av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt); return ret; } } #endif if (o) return 0; return AVERROR_OPTION_NOT_FOUND; } /* * Check whether given option is a group separator. * * @return index of the group definition that matched or -1 if none */ static int match_group_separator(const OptionGroupDef *groups, int nb_groups, const char *opt) { int i; for (i = 0; i < nb_groups; i++) { const OptionGroupDef *p = &groups[i]; if (p->sep && !strcmp(p->sep, opt)) return i; } return -1; } /* * Finish parsing an option group. * * @param group_idx which group definition should this group belong to * @param arg argument of the group delimiting option */ static void finish_group(OptionParseContext *octx, int group_idx, const char *arg) { OptionGroupList *l = &octx->groups[group_idx]; OptionGroup *g; GROW_ARRAY(l->groups, l->nb_groups); g = &l->groups[l->nb_groups - 1]; *g = octx->cur_group; g->arg = arg; g->group_def = l->group_def; #if CONFIG_SWSCALE g->sws_opts = sws_opts; #endif g->codec_opts = codec_opts; g->format_opts = format_opts; g->resample_opts = resample_opts; codec_opts = NULL; format_opts = NULL; resample_opts = NULL; #if CONFIG_SWSCALE sws_opts = NULL; #endif init_opts(); memset(&octx->cur_group, 0, sizeof(octx->cur_group)); } /* * Add an option instance to currently parsed group. */ static void add_opt(OptionParseContext *octx, const OptionDef *opt, const char *key, const char *val) { int global = !(opt->flags & (OPT_PERFILE | OPT_SPEC | OPT_OFFSET)); OptionGroup *g = global ? &octx->global_opts : &octx->cur_group; GROW_ARRAY(g->opts, g->nb_opts); g->opts[g->nb_opts - 1].opt = opt; g->opts[g->nb_opts - 1].key = key; g->opts[g->nb_opts - 1].val = val; } static void init_parse_context(OptionParseContext *octx, const OptionGroupDef *groups, int nb_groups) { static const OptionGroupDef global_group = { "global" }; int i; memset(octx, 0, sizeof(*octx)); octx->nb_groups = nb_groups; octx->groups = av_mallocz(sizeof(*octx->groups) * octx->nb_groups); if (!octx->groups) exit_program(1); for (i = 0; i < octx->nb_groups; i++) octx->groups[i].group_def = &groups[i]; octx->global_opts.group_def = &global_group; octx->global_opts.arg = ""; init_opts(); } void uninit_parse_context(OptionParseContext *octx) { int i, j; for (i = 0; i < octx->nb_groups; i++) { OptionGroupList *l = &octx->groups[i]; for (j = 0; j < l->nb_groups; j++) { av_freep(&l->groups[j].opts); av_dict_free(&l->groups[j].codec_opts); av_dict_free(&l->groups[j].format_opts); av_dict_free(&l->groups[j].resample_opts); #if CONFIG_SWSCALE sws_freeContext(l->groups[j].sws_opts); #endif } av_freep(&l->groups); } av_freep(&octx->groups); av_freep(&octx->cur_group.opts); av_freep(&octx->global_opts.opts); uninit_opts(); } int split_commandline(OptionParseContext *octx, int argc, char *argv[], const OptionDef *options, const OptionGroupDef *groups, int nb_groups) { int optindex = 1; /* perform system-dependent conversions for arguments list */ prepare_app_arguments(&argc, &argv); init_parse_context(octx, groups, nb_groups); av_log(NULL, AV_LOG_DEBUG, "Splitting the commandline.\n"); while (optindex < argc) { const char *opt = argv[optindex++], *arg; const OptionDef *po; int ret; av_log(NULL, AV_LOG_DEBUG, "Reading option '%s' ...", opt); /* unnamed group separators, e.g. output filename */ if (opt[0] != '-' || !opt[1]) { finish_group(octx, 0, opt); av_log(NULL, AV_LOG_DEBUG, " matched as %s.\n", groups[0].name); continue; } opt++; #define GET_ARG(arg) \ do { \ arg = argv[optindex++]; \ if (!arg) { \ av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\ return AVERROR(EINVAL); \ } \ } while (0) /* named group separators, e.g. -i */ if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) { GET_ARG(arg); finish_group(octx, ret, arg); av_log(NULL, AV_LOG_DEBUG, " matched as %s with argument '%s'.\n", groups[ret].name, arg); continue; } /* normal options */ po = find_option(options, opt); if (po->name) { if (po->flags & OPT_EXIT) { /* optional argument, e.g. -h */ arg = argv[optindex++]; } else if (po->flags & HAS_ARG) { GET_ARG(arg); } else { arg = "1"; } add_opt(octx, po, opt, arg); av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with " "argument '%s'.\n", po->name, po->help, arg); continue; } /* AVOptions */ if (argv[optindex]) { ret = opt_default(NULL, opt, argv[optindex]); if (ret >= 0) { av_log(NULL, AV_LOG_DEBUG, " matched as AVOption '%s' with " "argument '%s'.\n", opt, argv[optindex]); optindex++; continue; } else if (ret != AVERROR_OPTION_NOT_FOUND) { av_log(NULL, AV_LOG_ERROR, "Error parsing option '%s' " "with argument '%s'.\n", opt, argv[optindex]); return ret; } } /* boolean -nofoo options */ if (opt[0] == 'n' && opt[1] == 'o' && (po = find_option(options, opt + 2)) && po->name && po->flags & OPT_BOOL) { add_opt(octx, po, opt, "0"); av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with " "argument 0.\n", po->name, po->help); continue; } av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'.\n", opt); return AVERROR_OPTION_NOT_FOUND; } if (octx->cur_group.nb_opts || codec_opts || format_opts || resample_opts) av_log(NULL, AV_LOG_WARNING, "Trailing options were found on the " "commandline.\n"); av_log(NULL, AV_LOG_DEBUG, "Finished splitting the commandline.\n"); return 0; } int opt_loglevel(void *optctx, const char *opt, const char *arg) { const struct { const char *name; int level; } log_levels[] = { { "quiet" , AV_LOG_QUIET }, { "panic" , AV_LOG_PANIC }, { "fatal" , AV_LOG_FATAL }, { "error" , AV_LOG_ERROR }, { "warning", AV_LOG_WARNING }, { "info" , AV_LOG_INFO }, { "verbose", AV_LOG_VERBOSE }, { "debug" , AV_LOG_DEBUG }, }; char *tail; int level; int i; for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) { if (!strcmp(log_levels[i].name, arg)) { av_log_set_level(log_levels[i].level); return 0; } } level = strtol(arg, &tail, 10); if (*tail) { av_log(NULL, AV_LOG_FATAL, "Invalid loglevel \"%s\". " "Possible levels are numbers or:\n", arg); for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) av_log(NULL, AV_LOG_FATAL, "\"%s\"\n", log_levels[i].name); exit_program(1); } av_log_set_level(level); return 0; } int opt_timelimit(void *optctx, const char *opt, const char *arg) { #if HAVE_SETRLIMIT int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX); struct rlimit rl = { lim, lim + 1 }; if (setrlimit(RLIMIT_CPU, &rl)) perror("setrlimit"); #else av_log(NULL, AV_LOG_WARNING, "-%s not implemented on this OS\n", opt); #endif return 0; } void print_error(const char *filename, int err) { char errbuf[128]; const char *errbuf_ptr = errbuf; if (av_strerror(err, errbuf, sizeof(errbuf)) < 0) errbuf_ptr = strerror(AVUNERROR(err)); av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr); } static int warned_cfg = 0; #define INDENT 1 #define SHOW_VERSION 2 #define SHOW_CONFIG 4 #define PRINT_LIB_INFO(libname, LIBNAME, flags, level) \ if (CONFIG_##LIBNAME) { \ const char *indent = flags & INDENT? " " : ""; \ if (flags & SHOW_VERSION) { \ unsigned int version = libname##_version(); \ av_log(NULL, level, \ "%slib%-10s %2d.%3d.%2d / %2d.%3d.%2d\n", \ indent, #libname, \ LIB##LIBNAME##_VERSION_MAJOR, \ LIB##LIBNAME##_VERSION_MINOR, \ LIB##LIBNAME##_VERSION_MICRO, \ version >> 16, version >> 8 & 0xff, version & 0xff); \ } \ if (flags & SHOW_CONFIG) { \ const char *cfg = libname##_configuration(); \ if (strcmp(LIBAV_CONFIGURATION, cfg)) { \ if (!warned_cfg) { \ av_log(NULL, level, \ "%sWARNING: library configuration mismatch\n", \ indent); \ warned_cfg = 1; \ } \ av_log(NULL, level, "%s%-11s configuration: %s\n", \ indent, #libname, cfg); \ } \ } \ } \ static void print_all_libs_info(int flags, int level) { PRINT_LIB_INFO(avutil, AVUTIL, flags, level); PRINT_LIB_INFO(avcodec, AVCODEC, flags, level); PRINT_LIB_INFO(avformat, AVFORMAT, flags, level); PRINT_LIB_INFO(avdevice, AVDEVICE, flags, level); PRINT_LIB_INFO(avfilter, AVFILTER, flags, level); PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level); PRINT_LIB_INFO(swscale, SWSCALE, flags, level); } void show_banner(void) { av_log(NULL, AV_LOG_INFO, "%s version " LIBAV_VERSION ", Copyright (c) %d-%d the Libav developers\n", program_name, program_birth_year, this_year); av_log(NULL, AV_LOG_INFO, " built on %s %s with %s\n", __DATE__, __TIME__, CC_IDENT); av_log(NULL, AV_LOG_VERBOSE, " configuration: " LIBAV_CONFIGURATION "\n"); print_all_libs_info(INDENT|SHOW_CONFIG, AV_LOG_VERBOSE); print_all_libs_info(INDENT|SHOW_VERSION, AV_LOG_VERBOSE); } int show_version(void *optctx, const char *opt, const char *arg) { av_log_set_callback(log_callback_help); printf("%s " LIBAV_VERSION "\n", program_name); print_all_libs_info(SHOW_VERSION, AV_LOG_INFO); return 0; } int show_license(void *optctx, const char *opt, const char *arg) { printf( #if CONFIG_NONFREE "This version of %s has nonfree parts compiled in.\n" "Therefore it is not legally redistributable.\n", program_name #elif CONFIG_GPLV3 "%s is free software; you can redistribute it and/or modify\n" "it under the terms of the GNU General Public License as published by\n" "the Free Software Foundation; either version 3 of the License, or\n" "(at your option) any later version.\n" "\n" "%s is distributed in the hope that it will be useful,\n" "but WITHOUT ANY WARRANTY; without even the implied warranty of\n" "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" "GNU General Public License for more details.\n" "\n" "You should have received a copy of the GNU General Public License\n" "along with %s. If not, see <http://www.gnu.org/licenses/>.\n", program_name, program_name, program_name #elif CONFIG_GPL "%s is free software; you can redistribute it and/or modify\n" "it under the terms of the GNU General Public License as published by\n" "the Free Software Foundation; either version 2 of the License, or\n" "(at your option) any later version.\n" "\n" "%s is distributed in the hope that it will be useful,\n" "but WITHOUT ANY WARRANTY; without even the implied warranty of\n" "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" "GNU General Public License for more details.\n" "\n" "You should have received a copy of the GNU General Public License\n" "along with %s; if not, write to the Free Software\n" "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n", program_name, program_name, program_name #elif CONFIG_LGPLV3 "%s is free software; you can redistribute it and/or modify\n" "it under the terms of the GNU Lesser General Public License as published by\n" "the Free Software Foundation; either version 3 of the License, or\n" "(at your option) any later version.\n" "\n" "%s is distributed in the hope that it will be useful,\n" "but WITHOUT ANY WARRANTY; without even the implied warranty of\n" "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" "GNU Lesser General Public License for more details.\n" "\n" "You should have received a copy of the GNU Lesser General Public License\n" "along with %s. If not, see <http://www.gnu.org/licenses/>.\n", program_name, program_name, program_name #else "%s is free software; you can redistribute it and/or\n" "modify it under the terms of the GNU Lesser General Public\n" "License as published by the Free Software Foundation; either\n" "version 2.1 of the License, or (at your option) any later version.\n" "\n" "%s is distributed in the hope that it will be useful,\n" "but WITHOUT ANY WARRANTY; without even the implied warranty of\n" "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n" "Lesser General Public License for more details.\n" "\n" "You should have received a copy of the GNU Lesser General Public\n" "License along with %s; if not, write to the Free Software\n" "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n", program_name, program_name, program_name #endif ); return 0; } int show_formats(void *optctx, const char *opt, const char *arg) { AVInputFormat *ifmt = NULL; AVOutputFormat *ofmt = NULL; const char *last_name; printf("File formats:\n" " D. = Demuxing supported\n" " .E = Muxing supported\n" " --\n"); last_name = "000"; for (;;) { int decode = 0; int encode = 0; const char *name = NULL; const char *long_name = NULL; while ((ofmt = av_oformat_next(ofmt))) { if ((name == NULL || strcmp(ofmt->name, name) < 0) && strcmp(ofmt->name, last_name) > 0) { name = ofmt->name; long_name = ofmt->long_name; encode = 1; } } while ((ifmt = av_iformat_next(ifmt))) { if ((name == NULL || strcmp(ifmt->name, name) < 0) && strcmp(ifmt->name, last_name) > 0) { name = ifmt->name; long_name = ifmt->long_name; encode = 0; } if (name && strcmp(ifmt->name, name) == 0) decode = 1; } if (name == NULL) break; last_name = name; printf(" %s%s %-15s %s\n", decode ? "D" : " ", encode ? "E" : " ", name, long_name ? long_name:" "); } return 0; } #define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name) \ if (codec->field) { \ const type *p = c->field; \ \ printf(" Supported " list_name ":"); \ while (*p != term) { \ get_name(*p); \ printf(" %s", name); \ p++; \ } \ printf("\n"); \ } \ static void print_codec(const AVCodec *c) { int encoder = av_codec_is_encoder(c); printf("%s %s [%s]:\n", encoder ? "Encoder" : "Decoder", c->name, c->long_name ? c->long_name : ""); if (c->type == AVMEDIA_TYPE_VIDEO) { printf(" Threading capabilities: "); switch (c->capabilities & (CODEC_CAP_FRAME_THREADS | CODEC_CAP_SLICE_THREADS)) { case CODEC_CAP_FRAME_THREADS | CODEC_CAP_SLICE_THREADS: printf("frame and slice"); break; case CODEC_CAP_FRAME_THREADS: printf("frame"); break; case CODEC_CAP_SLICE_THREADS: printf("slice"); break; default: printf("no"); break; } printf("\n"); } if (c->supported_framerates) { const AVRational *fps = c->supported_framerates; printf(" Supported framerates:"); while (fps->num) { printf(" %d/%d", fps->num, fps->den); fps++; } printf("\n"); } PRINT_CODEC_SUPPORTED(c, pix_fmts, enum AVPixelFormat, "pixel formats", AV_PIX_FMT_NONE, GET_PIX_FMT_NAME); PRINT_CODEC_SUPPORTED(c, supported_samplerates, int, "sample rates", 0, GET_SAMPLE_RATE_NAME); PRINT_CODEC_SUPPORTED(c, sample_fmts, enum AVSampleFormat, "sample formats", AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME); PRINT_CODEC_SUPPORTED(c, channel_layouts, uint64_t, "channel layouts", 0, GET_CH_LAYOUT_DESC); if (c->priv_class) { show_help_children(c->priv_class, AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_DECODING_PARAM); } } static char get_media_type_char(enum AVMediaType type) { switch (type) { case AVMEDIA_TYPE_VIDEO: return 'V'; case AVMEDIA_TYPE_AUDIO: return 'A'; case AVMEDIA_TYPE_SUBTITLE: return 'S'; default: return '?'; } } static const AVCodec *next_codec_for_id(enum AVCodecID id, const AVCodec *prev, int encoder) { while ((prev = av_codec_next(prev))) { if (prev->id == id && (encoder ? av_codec_is_encoder(prev) : av_codec_is_decoder(prev))) return prev; } return NULL; } static void print_codecs_for_id(enum AVCodecID id, int encoder) { const AVCodec *codec = NULL; printf(" (%s: ", encoder ? "encoders" : "decoders"); while ((codec = next_codec_for_id(id, codec, encoder))) printf("%s ", codec->name); printf(")"); } int show_codecs(void *optctx, const char *opt, const char *arg) { const AVCodecDescriptor *desc = NULL; printf("Codecs:\n" " D..... = Decoding supported\n" " .E.... = Encoding supported\n" " ..V... = Video codec\n" " ..A... = Audio codec\n" " ..S... = Subtitle codec\n" " ...I.. = Intra frame-only codec\n" " ....L. = Lossy compression\n" " .....S = Lossless compression\n" " -------\n"); while ((desc = avcodec_descriptor_next(desc))) { const AVCodec *codec = NULL; printf(avcodec_find_decoder(desc->id) ? "D" : "."); printf(avcodec_find_encoder(desc->id) ? "E" : "."); printf("%c", get_media_type_char(desc->type)); printf((desc->props & AV_CODEC_PROP_INTRA_ONLY) ? "I" : "."); printf((desc->props & AV_CODEC_PROP_LOSSY) ? "L" : "."); printf((desc->props & AV_CODEC_PROP_LOSSLESS) ? "S" : "."); printf(" %-20s %s", desc->name, desc->long_name ? desc->long_name : ""); /* print decoders/encoders when there's more than one or their * names are different from codec name */ while ((codec = next_codec_for_id(desc->id, codec, 0))) { if (strcmp(codec->name, desc->name)) { print_codecs_for_id(desc->id, 0); break; } } codec = NULL; while ((codec = next_codec_for_id(desc->id, codec, 1))) { if (strcmp(codec->name, desc->name)) { print_codecs_for_id(desc->id, 1); break; } } printf("\n"); } return 0; } static void print_codecs(int encoder) { const AVCodecDescriptor *desc = NULL; printf("%s:\n" " V... = Video\n" " A... = Audio\n" " S... = Subtitle\n" " .F.. = Frame-level multithreading\n" " ..S. = Slice-level multithreading\n" " ...X = Codec is experimental\n" " ---\n", encoder ? "Encoders" : "Decoders"); while ((desc = avcodec_descriptor_next(desc))) { const AVCodec *codec = NULL; while ((codec = next_codec_for_id(desc->id, codec, encoder))) { printf("%c", get_media_type_char(desc->type)); printf((codec->capabilities & CODEC_CAP_FRAME_THREADS) ? "F" : "."); printf((codec->capabilities & CODEC_CAP_SLICE_THREADS) ? "S" : "."); printf((codec->capabilities & CODEC_CAP_EXPERIMENTAL) ? "X" : "."); printf(" %-20s %s", codec->name, codec->long_name ? codec->long_name : ""); if (strcmp(codec->name, desc->name)) printf(" (codec %s)", desc->name); printf("\n"); } } } int show_decoders(void *optctx, const char *opt, const char *arg) { print_codecs(0); return 0; } int show_encoders(void *optctx, const char *opt, const char *arg) { print_codecs(1); return 0; } int show_bsfs(void *optctx, const char *opt, const char *arg) { AVBitStreamFilter *bsf = NULL; printf("Bitstream filters:\n"); while ((bsf = av_bitstream_filter_next(bsf))) printf("%s\n", bsf->name); printf("\n"); return 0; } int show_protocols(void *optctx, const char *opt, const char *arg) { void *opaque = NULL; const char *name; printf("Supported file protocols:\n" "Input:\n"); while ((name = avio_enum_protocols(&opaque, 0))) printf("%s\n", name); printf("Output:\n"); while ((name = avio_enum_protocols(&opaque, 1))) printf("%s\n", name); return 0; } int show_filters(void *optctx, const char *opt, const char *arg) { const AVFilter av_unused(*filter) = NULL; printf("Filters:\n"); #if CONFIG_AVFILTER while ((filter = avfilter_next(filter))) printf("%-16s %s\n", filter->name, filter->description); #endif return 0; } int show_pix_fmts(void *optctx, const char *opt, const char *arg) { const AVPixFmtDescriptor *pix_desc = NULL; printf("Pixel formats:\n" "I.... = Supported Input format for conversion\n" ".O... = Supported Output format for conversion\n" "..H.. = Hardware accelerated format\n" "...P. = Paletted format\n" "....B = Bitstream format\n" "FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL\n" "-----\n"); #if !CONFIG_SWSCALE # define sws_isSupportedInput(x) 0 # define sws_isSupportedOutput(x) 0 #endif while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) { enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(pix_desc); printf("%c%c%c%c%c %-16s %d %2d\n", sws_isSupportedInput (pix_fmt) ? 'I' : '.', sws_isSupportedOutput(pix_fmt) ? 'O' : '.', pix_desc->flags & AV_PIX_FMT_FLAG_HWACCEL ? 'H' : '.', pix_desc->flags & AV_PIX_FMT_FLAG_PAL ? 'P' : '.', pix_desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ? 'B' : '.', pix_desc->name, pix_desc->nb_components, av_get_bits_per_pixel(pix_desc)); } return 0; } int show_sample_fmts(void *optctx, const char *opt, const char *arg) { int i; char fmt_str[128]; for (i = -1; i < AV_SAMPLE_FMT_NB; i++) printf("%s\n", av_get_sample_fmt_string(fmt_str, sizeof(fmt_str), i)); return 0; } static void show_help_codec(const char *name, int encoder) { const AVCodecDescriptor *desc; const AVCodec *codec; if (!name) { av_log(NULL, AV_LOG_ERROR, "No codec name specified.\n"); return; } codec = encoder ? avcodec_find_encoder_by_name(name) : avcodec_find_decoder_by_name(name); if (codec) print_codec(codec); else if ((desc = avcodec_descriptor_get_by_name(name))) { int printed = 0; while ((codec = next_codec_for_id(desc->id, codec, encoder))) { printed = 1; print_codec(codec); } if (!printed) { av_log(NULL, AV_LOG_ERROR, "Codec '%s' is known to Libav, " "but no %s for it are available. Libav might need to be " "recompiled with additional external libraries.\n", name, encoder ? "encoders" : "decoders"); } } else { av_log(NULL, AV_LOG_ERROR, "Codec '%s' is not recognized by Libav.\n", name); } } static void show_help_demuxer(const char *name) { const AVInputFormat *fmt = av_find_input_format(name); if (!fmt) { av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name); return; } printf("Demuxer %s [%s]:\n", fmt->name, fmt->long_name); if (fmt->extensions) printf(" Common extensions: %s.\n", fmt->extensions); if (fmt->priv_class) show_help_children(fmt->priv_class, AV_OPT_FLAG_DECODING_PARAM); } static void show_help_muxer(const char *name) { const AVCodecDescriptor *desc; const AVOutputFormat *fmt = av_guess_format(name, NULL, NULL); if (!fmt) { av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name); return; } printf("Muxer %s [%s]:\n", fmt->name, fmt->long_name); if (fmt->extensions) printf(" Common extensions: %s.\n", fmt->extensions); if (fmt->mime_type) printf(" Mime type: %s.\n", fmt->mime_type); if (fmt->video_codec != AV_CODEC_ID_NONE && (desc = avcodec_descriptor_get(fmt->video_codec))) { printf(" Default video codec: %s.\n", desc->name); } if (fmt->audio_codec != AV_CODEC_ID_NONE && (desc = avcodec_descriptor_get(fmt->audio_codec))) { printf(" Default audio codec: %s.\n", desc->name); } if (fmt->subtitle_codec != AV_CODEC_ID_NONE && (desc = avcodec_descriptor_get(fmt->subtitle_codec))) { printf(" Default subtitle codec: %s.\n", desc->name); } if (fmt->priv_class) show_help_children(fmt->priv_class, AV_OPT_FLAG_ENCODING_PARAM); } #if CONFIG_AVFILTER static void show_help_filter(const char *name) { const AVFilter *f = avfilter_get_by_name(name); int i, count; if (!name) { av_log(NULL, AV_LOG_ERROR, "No filter name specified.\n"); return; } else if (!f) { av_log(NULL, AV_LOG_ERROR, "Unknown filter '%s'.\n", name); return; } printf("Filter %s [%s]:\n", f->name, f->description); if (f->flags & AVFILTER_FLAG_SLICE_THREADS) printf(" slice threading supported\n"); printf(" Inputs:\n"); count = avfilter_pad_count(f->inputs); for (i = 0; i < count; i++) { printf(" %d %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i), media_type_string(avfilter_pad_get_type(f->inputs, i))); } if (f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS) printf(" dynamic (depending on the options)\n"); printf(" Outputs:\n"); count = avfilter_pad_count(f->outputs); for (i = 0; i < count; i++) { printf(" %d %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i), media_type_string(avfilter_pad_get_type(f->outputs, i))); } if (f->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS) printf(" dynamic (depending on the options)\n"); if (f->priv_class) show_help_children(f->priv_class, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM); } #endif int show_help(void *optctx, const char *opt, const char *arg) { char *topic, *par; av_log_set_callback(log_callback_help); topic = av_strdup(arg ? arg : ""); par = strchr(topic, '='); if (par) *par++ = 0; if (!*topic) { show_help_default(topic, par); } else if (!strcmp(topic, "decoder")) { show_help_codec(par, 0); } else if (!strcmp(topic, "encoder")) { show_help_codec(par, 1); } else if (!strcmp(topic, "demuxer")) { show_help_demuxer(par); } else if (!strcmp(topic, "muxer")) { show_help_muxer(par); #if CONFIG_AVFILTER } else if (!strcmp(topic, "filter")) { show_help_filter(par); #endif } else { show_help_default(topic, par); } av_freep(&topic); return 0; } int read_yesno(void) { int c = getchar(); int yesno = (av_toupper(c) == 'Y'); while (c != '\n' && c != EOF) c = getchar(); return yesno; } int cmdutils_read_file(const char *filename, char **bufptr, size_t *size) { int ret; FILE *f = fopen(filename, "rb"); if (!f) { av_log(NULL, AV_LOG_ERROR, "Cannot read file '%s': %s\n", filename, strerror(errno)); return AVERROR(errno); } fseek(f, 0, SEEK_END); *size = ftell(f); fseek(f, 0, SEEK_SET); *bufptr = av_malloc(*size + 1); if (!*bufptr) { av_log(NULL, AV_LOG_ERROR, "Could not allocate file buffer\n"); fclose(f); return AVERROR(ENOMEM); } ret = fread(*bufptr, 1, *size, f); if (ret < *size) { av_free(*bufptr); if (ferror(f)) { av_log(NULL, AV_LOG_ERROR, "Error while reading file '%s': %s\n", filename, strerror(errno)); ret = AVERROR(errno); } else ret = AVERROR_EOF; } else { ret = 0; (*bufptr)[(*size)++] = '\0'; } fclose(f); return ret; } void init_pts_correction(PtsCorrectionContext *ctx) { ctx->num_faulty_pts = ctx->num_faulty_dts = 0; ctx->last_pts = ctx->last_dts = INT64_MIN; } int64_t guess_correct_pts(PtsCorrectionContext *ctx, int64_t reordered_pts, int64_t dts) { int64_t pts = AV_NOPTS_VALUE; if (dts != AV_NOPTS_VALUE) { ctx->num_faulty_dts += dts <= ctx->last_dts; ctx->last_dts = dts; } if (reordered_pts != AV_NOPTS_VALUE) { ctx->num_faulty_pts += reordered_pts <= ctx->last_pts; ctx->last_pts = reordered_pts; } if ((ctx->num_faulty_pts<=ctx->num_faulty_dts || dts == AV_NOPTS_VALUE) && reordered_pts != AV_NOPTS_VALUE) pts = reordered_pts; else pts = dts; return pts; } FILE *get_preset_file(char *filename, size_t filename_size, const char *preset_name, int is_path, const char *codec_name) { FILE *f = NULL; int i; const char *base[3] = { getenv("AVCONV_DATADIR"), getenv("HOME"), AVCONV_DATADIR, }; if (is_path) { av_strlcpy(filename, preset_name, filename_size); f = fopen(filename, "r"); } else { for (i = 0; i < 3 && !f; i++) { if (!base[i]) continue; snprintf(filename, filename_size, "%s%s/%s.avpreset", base[i], i != 1 ? "" : "/.avconv", preset_name); f = fopen(filename, "r"); if (!f && codec_name) { snprintf(filename, filename_size, "%s%s/%s-%s.avpreset", base[i], i != 1 ? "" : "/.avconv", codec_name, preset_name); f = fopen(filename, "r"); } } } return f; } int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec) { if (*spec <= '9' && *spec >= '0') /* opt:index */ return strtol(spec, NULL, 0) == st->index; else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' || *spec == 't') { /* opt:[vasdt] */ enum AVMediaType type; switch (*spec++) { case 'v': type = AVMEDIA_TYPE_VIDEO; break; case 'a': type = AVMEDIA_TYPE_AUDIO; break; case 's': type = AVMEDIA_TYPE_SUBTITLE; break; case 'd': type = AVMEDIA_TYPE_DATA; break; case 't': type = AVMEDIA_TYPE_ATTACHMENT; break; default: av_assert0(0); } if (type != st->codec->codec_type) return 0; if (*spec++ == ':') { /* possibly followed by :index */ int i, index = strtol(spec, NULL, 0); for (i = 0; i < s->nb_streams; i++) if (s->streams[i]->codec->codec_type == type && index-- == 0) return i == st->index; return 0; } return 1; } else if (*spec == 'p' && *(spec + 1) == ':') { int prog_id, i, j; char *endptr; spec += 2; prog_id = strtol(spec, &endptr, 0); for (i = 0; i < s->nb_programs; i++) { if (s->programs[i]->id != prog_id) continue; if (*endptr++ == ':') { int stream_idx = strtol(endptr, NULL, 0); return stream_idx >= 0 && stream_idx < s->programs[i]->nb_stream_indexes && st->index == s->programs[i]->stream_index[stream_idx]; } for (j = 0; j < s->programs[i]->nb_stream_indexes; j++) if (st->index == s->programs[i]->stream_index[j]) return 1; } return 0; } else if (!*spec) /* empty specifier, matches everything */ return 1; av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec); return AVERROR(EINVAL); } AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id, AVFormatContext *s, AVStream *st, AVCodec *codec) { AVDictionary *ret = NULL; AVDictionaryEntry *t = NULL; int flags = s->oformat ? AV_OPT_FLAG_ENCODING_PARAM : AV_OPT_FLAG_DECODING_PARAM; char prefix = 0; const AVClass *cc = avcodec_get_class(); if (!codec) codec = s->oformat ? avcodec_find_encoder(codec_id) : avcodec_find_decoder(codec_id); switch (st->codec->codec_type) { case AVMEDIA_TYPE_VIDEO: prefix = 'v'; flags |= AV_OPT_FLAG_VIDEO_PARAM; break; case AVMEDIA_TYPE_AUDIO: prefix = 'a'; flags |= AV_OPT_FLAG_AUDIO_PARAM; break; case AVMEDIA_TYPE_SUBTITLE: prefix = 's'; flags |= AV_OPT_FLAG_SUBTITLE_PARAM; break; } while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) { char *p = strchr(t->key, ':'); /* check stream specification in opt name */ if (p) switch (check_stream_specifier(s, st, p + 1)) { case 1: *p = 0; break; case 0: continue; default: return NULL; } if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) || (codec && codec->priv_class && av_opt_find(&codec->priv_class, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ))) av_dict_set(&ret, t->key, t->value, 0); else if (t->key[0] == prefix && av_opt_find(&cc, t->key + 1, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ)) av_dict_set(&ret, t->key + 1, t->value, 0); if (p) *p = ':'; } return ret; } AVDictionary **setup_find_stream_info_opts(AVFormatContext *s, AVDictionary *codec_opts) { int i; AVDictionary **opts; if (!s->nb_streams) return NULL; opts = av_mallocz(s->nb_streams * sizeof(*opts)); if (!opts) { av_log(NULL, AV_LOG_ERROR, "Could not alloc memory for stream options.\n"); return NULL; } for (i = 0; i < s->nb_streams; i++) opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codec->codec_id, s, s->streams[i], NULL); return opts; } void *grow_array(void *array, int elem_size, int *size, int new_size) { if (new_size >= INT_MAX / elem_size) { av_log(NULL, AV_LOG_ERROR, "Array too big.\n"); exit_program(1); } if (*size < new_size) { uint8_t *tmp = av_realloc(array, new_size*elem_size); if (!tmp) { av_log(NULL, AV_LOG_ERROR, "Could not alloc buffer.\n"); exit_program(1); } memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size); *size = new_size; return tmp; } return array; } 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"; } }