FFmpeg: cmdutils.c File Reference

FFmpeg

cmdutils.c File Reference

#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <math.h>
#include "config.h"
#include "compat/va_copy.h"
#include "libavformat/avformat.h"
#include "libavfilter/avfilter.h"
#include "libavdevice/avdevice.h"
#include "libavresample/avresample.h"
#include "libswscale/swscale.h"
#include "libswresample/swresample.h"
#include "libpostproc/postprocess.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.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 "libavutil/cpu.h"
#include "libavutil/ffversion.h"
#include "cmdutils.h"

Go to the source code of this file.

Macros

#define FLAGS (o->type == AV_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0

#define GET_ARG(arg)

#define INDENT 1

#define SHOW_VERSION 2

#define SHOW_CONFIG 4

#define SHOW_COPYRIGHT 8

#define PRINT_LIB_INFO(libname, LIBNAME, flags, level)

#define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name)

#define sws_isSupportedInput(x) 0

#define sws_isSupportedOutput(x) 0

Functions

static int init_report (const char *env)

void init_opts (void)

Initialize the cmdutils option system, in particular allocate the *_opts contexts.

void uninit_opts (void)

Uninitialize the cmdutils option system, in particular free the *_opts contexts and their contents.

void log_callback_help (void *ptr, int level, const char *fmt, va_list vl)

Trivial log callback.

static void log_callback_report (void *ptr, int level, const char *fmt, va_list vl)

void register_exit (void(*cb)(int ret))

void exit_program (int ret)

Wraps exit with a program-specific cleanup routine.

double parse_number_or_die (const char *context, const char *numstr, int type, double min, double max)

Parse a string and return its corresponding value as a double.

int64_t parse_time_or_die (const char *context, const char *timestr, int is_duration)

Parse a string specifying a time and return its corresponding value as a number of microseconds.

void show_help_options (const OptionDef *options, const char *msg, int req_flags, int rej_flags, int alt_flags)

Print help for all options matching specified flags.

void show_help_children (const AVClass *class, int flags)

Show help for all options with given flags in class and all its children.

static const OptionDef * find_option (const OptionDef *po, const char *name)

static void prepare_app_arguments (int *argc_ptr, char ***argv_ptr)

static int write_option (void *optctx, const OptionDef *po, const char *opt, const char *arg)

int parse_option (void *optctx, const char *opt, const char *arg, const OptionDef *options)

Parse one given option.

void parse_options (void *optctx, int argc, char **argv, const OptionDef *options, void(*parse_arg_function)(void *, const char *))

int parse_optgroup (void *optctx, OptionGroup *g)

Parse an options group and write results into optctx.

int locate_option (int argc, char **argv, const OptionDef *options, const char *optname)

Return index of option opt in argv or 0 if not found.

static void dump_argument (const char *a)

void parse_loglevel (int argc, char **argv, const OptionDef *options)

Find the '-loglevel' option in the command line args and apply it.

static const AVOption * opt_find (void *obj, const char *name, const char *unit, int opt_flags, int search_flags)

int opt_default (void *optctx, const char *opt, const char *arg)

Fallback for options that are not explicitly handled, these will be parsed through AVOptions.

static int match_group_separator (const OptionGroupDef *groups, int nb_groups, const char *opt)

static void finish_group (OptionParseContext *octx, int group_idx, const char *arg)

static void add_opt (OptionParseContext *octx, const OptionDef *opt, const char *key, const char *val)

static void init_parse_context (OptionParseContext *octx, const OptionGroupDef *groups, int nb_groups)

void uninit_parse_context (OptionParseContext *octx)

Free all allocated memory in an OptionParseContext.

int split_commandline (OptionParseContext *octx, int argc, char *argv[], const OptionDef *options, const OptionGroupDef *groups, int nb_groups)

Split the commandline into an intermediate form convenient for further processing.

int opt_cpuflags (void *optctx, const char *opt, const char *arg)

Override the cpuflags.

int opt_loglevel (void *optctx, const char *opt, const char *arg)

Set the libav* libraries log level.

static void expand_filename_template (AVBPrint *bp, const char *template, struct tm *tm)

int opt_report (const char *opt)

int opt_max_alloc (void *optctx, const char *opt, const char *arg)

int opt_timelimit (void *optctx, const char *opt, const char *arg)

Limit the execution time.

void print_error (const char *filename, int err)

Print an error message to stderr, indicating filename and a human readable description of the error code err.

static void print_all_libs_info (int flags, int level)

static void print_program_info (int flags, int level)

static void print_buildconf (int flags, int level)

void show_banner (int argc, char **argv, const OptionDef *options)

Print the program banner to stderr.

int show_version (void *optctx, const char *opt, const char *arg)

Print the version of the program to stdout.

int show_buildconf (void *optctx, const char *opt, const char *arg)

Print the build configuration of the program to stdout.

int show_license (void *optctx, const char *opt, const char *arg)

Print the license of the program to stdout.

int show_formats (void *optctx, const char *opt, const char *arg)

Print a listing containing all the formats supported by the program.

static void print_codec (const AVCodec *c)

static char get_media_type_char (enum AVMediaType type)

static const AVCodec * next_codec_for_id (enum AVCodecID id, const AVCodec *prev, int encoder)

static int compare_codec_desc (const void *a, const void *b)

static unsigned get_codecs_sorted (const AVCodecDescriptor ***rcodecs)

static void print_codecs_for_id (enum AVCodecID id, int encoder)

int show_codecs (void *optctx, const char *opt, const char *arg)

Print a listing containing all the codecs supported by the program.

static void print_codecs (int encoder)

int show_decoders (void *optctx, const char *opt, const char *arg)

Print a listing containing all the decoders supported by the program.

int show_encoders (void *optctx, const char *opt, const char *arg)

Print a listing containing all the encoders supported by the program.

int show_bsfs (void *optctx, const char *opt, const char *arg)

Print a listing containing all the bit stream filters supported by the program.

int show_protocols (void *optctx, const char *opt, const char *arg)

Print a listing containing all the protocols supported by the program.

int show_filters (void *optctx, const char *opt, const char *arg)

Print a listing containing all the filters supported by the program.

int show_colors (void *optctx, const char *opt, const char *arg)

Print a listing containing all the color names and values recognized by the program.

int show_pix_fmts (void *optctx, const char *opt, const char *arg)

Print a listing containing all the pixel formats supported by the program.

int show_layouts (void *optctx, const char *opt, const char *arg)

Print a listing containing all the standard channel layouts supported by the program.

int show_sample_fmts (void *optctx, const char *opt, const char *arg)

Print a listing containing all the sample formats supported by the program.

static void show_help_codec (const char *name, int encoder)

static void show_help_demuxer (const char *name)

static void show_help_muxer (const char *name)

int show_help (void *optctx, const char *opt, const char *arg)

Generic -h handler common to all fftools.

int read_yesno (void)

Return a positive value if a line read from standard input starts with [yY], otherwise return 0.

int cmdutils_read_file (const char *filename, char **bufptr, size_t *size)

Read the file with name filename, and put its content in a newly allocated 0-terminated buffer.

FILE * get_preset_file (char *filename, size_t filename_size, const char *preset_name, int is_path, const char *codec_name)

Get a file corresponding to a preset file.

int check_stream_specifier (AVFormatContext *s, AVStream *st, const char *spec)

Check if the given stream matches a stream specifier.

AVDictionary * filter_codec_opts (AVDictionary *opts, enum AVCodecID codec_id, AVFormatContext *s, AVStream *st, AVCodec *codec)

Filter out options for given codec.

AVDictionary ** setup_find_stream_info_opts (AVFormatContext *s, AVDictionary *codec_opts)

Setup AVCodecContext options for avformat_find_stream_info().

void * grow_array (void *array, int elem_size, int *size, int new_size)

Realloc array to hold new_size elements of elem_size.

Variables

struct SwsContext * sws_opts

AVDictionary * swr_opts

AVDictionary * format_opts

AVDictionary * codec_opts

AVDictionary * resample_opts

static FILE * report_file

int hide_banner = 0

static void(* program_exit )(int ret)

static int warned_cfg = 0

Macro Definition Documentation

#define FLAGS (o->type == AV_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0

Definition at line 509 of file cmdutils.c.

Referenced by opt_default().

#define GET_ARG ( arg )

Value:

do { \

arg = argv[optindex++]; \

if (!arg) { \

av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\

return AVERROR(EINVAL); \

} \

} while (0)

Referenced by split_commandline().

#define INDENT 1

Definition at line 1000 of file cmdutils.c.

Referenced by print_buildconf(), print_program_info(), show_banner(), and show_buildconf().

#define SHOW_VERSION 2

Definition at line 1001 of file cmdutils.c.

Referenced by show_banner(), and show_version().

#define SHOW_CONFIG 4

Definition at line 1002 of file cmdutils.c.

Referenced by show_banner().

#define SHOW_COPYRIGHT 8

Definition at line 1003 of file cmdutils.c.

Referenced by print_program_info(), and show_banner().

#define PRINT_LIB_INFO ( libname,

LIBNAME,

flags,

level

)

Value:

if (CONFIG_##LIBNAME) { \

const char *indent = flags & INDENT? " " : ""; \

if (flags & SHOW_VERSION) { \

unsigned int version = libname##_version(); \

av_log(NULL, level, \

"%slib%-11s %2d.%3d.%3d / %2d.%3d.%3d\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(FFMPEG_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); \

} \

Definition at line 1005 of file cmdutils.c.

Referenced by print_all_libs_info().

#define PRINT_CODEC_SUPPORTED ( codec,

field,

type,

list_name,

term,

get_name

)

Value:

if (codec->field) { \

const type *p = codec->field; \

printf(" Supported " list_name ":"); \

while (*p != term) { \

get_name(*p); \

printf(" %s", name); \

p++; \

} \

printf("\n"); \

} \

Definition at line 1237 of file cmdutils.c.

Referenced by print_codec().

#define sws_isSupportedInput ( x ) 0

Referenced by query_formats(), selfTest(), show_pix_fmts(), sws_init_context(), and sws_isSupportedInput().

#define sws_isSupportedOutput ( x ) 0

Referenced by query_formats(), selfTest(), show_pix_fmts(), sws_init_context(), and sws_isSupportedOutput().

Function Documentation

static int init_report ( const char * env )

static

Definition at line 893 of file cmdutils.c.

Referenced by opt_report(), and parse_loglevel().

void init_opts ( void )

Initialize the cmdutils option system, in particular allocate the *_opts contexts.

Definition at line 71 of file cmdutils.c.

Referenced by finish_group(), init_parse_context(), and main().

void uninit_opts ( void )

Uninitialize the cmdutils option system, in particular free the *_opts contexts and their contents.

Definition at line 79 of file cmdutils.c.

Referenced by do_exit(), ffmpeg_cleanup(), main(), and uninit_parse_context().

void log_callback_help ( void * ptr,

int level,

const char * fmt,

va_list vl

)

Trivial log callback.

Only suitable for opt_help and similar since it lacks prefix handling.

Definition at line 92 of file cmdutils.c.

Referenced by show_buildconf(), show_help(), show_help_default(), and show_version().

static void log_callback_report ( void * ptr,

int level,

const char * fmt,

va_list vl

)

static

Definition at line 97 of file cmdutils.c.

Referenced by init_report().

void register_exit ( void(*)(int ret) cb )

Definition at line 113 of file cmdutils.c.

Referenced by main().

void exit_program ( int ret )

Wraps exit with a program-specific cleanup routine.

Definition at line 118 of file cmdutils.c.

Referenced by abort_codec_experimental(), add_input_streams(), assert_avoptions(), assert_file_overwrite(), check_streamcopy_filters(), choose_pix_fmts(), configure_filtergraph(), copy_metadata(), decode_audio(), decode_video(), DEF_CHOOSE_FORMAT(), do_audio_out(), do_subtitle_out(), do_video_out(), do_video_stats(), dump_attachment(), find_codec_or_die(), flush_encoders(), get_codecs_sorted(), get_format(), get_line(), get_ost_filters(), grow_array(), init_input_filter(), init_output_filter(), init_parse_context(), main(), new_audio_stream(), new_data_stream(), new_output_stream(), new_subtitle_stream(), new_video_stream(), open_input_file(), open_output_file(), opt_input_file(), opt_loglevel(), opt_map(), opt_map_channel(), opt_max_alloc(), opt_preset(), opt_streamid(), opt_target(), parse_forced_key_frames(), parse_matrix_coeffs(), parse_meta_type(), parse_number_or_die(), parse_options(), parse_time_or_die(), print_sdp(), process_input(), transcode_init(), write_frame(), and write_option().

double parse_number_or_die ( const char * context,

const char * numstr,

int type,

double min,

double max

)

Parse a string and return its corresponding value as a double.

Exit from the application if the string cannot be correctly parsed or the corresponding value is invalid.

Parameters: context the context of the value to be set (e.g. the corresponding command line option name)

numstr the string to be parsed

type the type (OPT_INT64 or OPT_FLOAT) as which the string should be parsed

min the minimum valid accepted value

max the maximum valid accepted value

Definition at line 126 of file cmdutils.c.

Referenced by opt_height(), opt_show_mode(), opt_streamid(), opt_timelimit(), opt_vsync(), opt_width(), and write_option().

int64_t parse_time_or_die ( const char * context,

const char * timestr,

int is_duration

)

Parse a string specifying a time and return its corresponding value as a number of microseconds.

Exit from the application if the string cannot be correctly parsed.

Parameters: context the context of the value to be set (e.g. the corresponding command line option name)

timestr the string to be parsed

is_duration a flag which tells how to interpret timestr, if not zero timestr is interpreted as a duration, otherwise as a date

See Also: av_parse_time()

Definition at line 147 of file cmdutils.c.

Referenced by opt_duration(), opt_recording_timestamp(), opt_seek(), parse_forced_key_frames(), and write_option().

void show_help_options ( const OptionDef * options,

const char * msg,

int req_flags,

int rej_flags,

int alt_flags

)

Print help for all options matching specified flags.

Parameters: options a list of options

msg title of this group. Only printed if at least one option matches.

req_flags print only options which have all those flags set.

rej_flags don't print options which have any of those flags set.

alt_flags print only options that have at least one of those flags set

Definition at line 159 of file cmdutils.c.

Referenced by show_help_default().

void show_help_children ( const AVClass * class,

int flags

)

Show help for all options with given flags in class and all its children.

Definition at line 188 of file cmdutils.c.

Referenced by print_codec(), show_help_children(), show_help_default(), show_help_demuxer(), and show_help_muxer().

static const OptionDef* find_option ( const OptionDef * po,

const char * name

)

static

Definition at line 200 of file cmdutils.c.

Referenced by locate_option(), parse_option(), and split_commandline().

static void prepare_app_arguments ( int * argc_ptr,

char *** argv_ptr

)

inlinestatic

Definition at line 272 of file cmdutils.c.

Referenced by parse_options(), and split_commandline().

static int write_option ( void * optctx,

const OptionDef * po,

const char * opt,

const char * arg

)

static

Definition at line 278 of file cmdutils.c.

Referenced by parse_optgroup(), and parse_option().

int parse_option ( void * optctx,

const char * opt,

const char * arg,

const OptionDef * options

)

Parse one given option.

Returns: on success 1 if arg was consumed, 0 otherwise; negative number on error

Definition at line 327 of file cmdutils.c.

Referenced by open_output_file(), opt_audio_codec(), opt_audio_filters(), opt_audio_frames(), opt_audio_qscale(), opt_channel_layout(), opt_data_codec(), opt_data_frames(), opt_old2new(), opt_qscale(), opt_recording_timestamp(), opt_subtitle_codec(), opt_target(), opt_timecode(), opt_video_codec(), opt_video_filters(), opt_video_frames(), and parse_options().

void parse_options ( void * optctx,

int argc,

char ** argv,

const OptionDef * options,

void(*)(void *, const char *) parse_arg_function

)

Definition at line 360 of file cmdutils.c.

Referenced by main(), and parse_script().

int parse_optgroup ( void * optctx,

OptionGroup * g

)

Parse an options group and write results into optctx.

Parameters: optctx an app-specific options context. NULL for global options group

Definition at line 391 of file cmdutils.c.

Referenced by ffmpeg_parse_options(), and open_files().

int locate_option ( int argc,

char ** argv,

const OptionDef * options,

const char * optname

)

Return index of option opt in argv or 0 if not found.

Definition at line 424 of file cmdutils.c.

Referenced by parse_loglevel(), and show_banner().

static void dump_argument ( const char * a )

static

Definition at line 450 of file cmdutils.c.

Referenced by parse_loglevel().

void parse_loglevel ( int argc,

char ** argv,

const OptionDef * options

)

Find the '-loglevel' option in the command line args and apply it.

Definition at line 474 of file cmdutils.c.

Referenced by main().

static const AVOption* opt_find ( void * obj,

const char * name,

const char * unit,

int opt_flags,

int search_flags

)

static

Definition at line 500 of file cmdutils.c.

Referenced by opt_default().

int opt_default ( void * optctx,

const char * opt,

const char * arg

)

Fallback for options that are not explicitly handled, these will be parsed through AVOptions.

Definition at line 510 of file cmdutils.c.

Referenced by opt_default_new(), opt_frame_pix_fmt(), opt_frame_size(), opt_video_channel(), opt_video_standard(), and split_commandline().

static int match_group_separator ( const OptionGroupDef * groups,

int nb_groups,

const char * opt

)

static

Definition at line 589 of file cmdutils.c.

Referenced by split_commandline().

static void finish_group ( OptionParseContext * octx,

int group_idx,

const char * arg

)

static

Definition at line 609 of file cmdutils.c.

Referenced by split_commandline().

static void add_opt ( OptionParseContext * octx,

const OptionDef * opt,

const char * key,

const char * val

)

static

Definition at line 644 of file cmdutils.c.

Referenced by split_commandline().

static void init_parse_context ( OptionParseContext * octx,

const OptionGroupDef * groups,

int nb_groups

)

static

Definition at line 656 of file cmdutils.c.

Referenced by split_commandline().

void uninit_parse_context ( OptionParseContext * octx )

Free all allocated memory in an OptionParseContext.

Definition at line 678 of file cmdutils.c.

Referenced by ffmpeg_parse_options().

int split_commandline ( OptionParseContext * octx,

int argc,

char * argv[],

const OptionDef * options,

const OptionGroupDef * groups,

int nb_groups

)

Split the commandline into an intermediate form convenient for further processing.

The commandline is assumed to be composed of options which either belong to a group (those with OPT_SPEC, OPT_OFFSET or OPT_PERFILE) or are global (everything else).

A group (defined by an OptionGroupDef struct) is a sequence of options terminated by either a group separator option (e.g. -i) or a parameter that is not an option (doesn't start with -). A group without a separator option must always be first in the supplied groups list.

All options within the same group are stored in one OptionGroup struct in an OptionGroupList, all groups with the same group definition are stored in one OptionGroupList in OptionParseContext.groups. The order of group lists is the same as the order of group definitions.

Definition at line 705 of file cmdutils.c.

Referenced by ffmpeg_parse_options().

int opt_cpuflags ( void * optctx,

const char * opt,

const char * arg

)

Override the cpuflags.

Definition at line 811 of file cmdutils.c.

int opt_loglevel ( void * optctx,

const char * opt,

const char * arg

)

Set the libav* libraries log level.

Definition at line 823 of file cmdutils.c.

Referenced by parse_loglevel().

static void expand_filename_template ( AVBPrint * bp,

const char * template,

struct tm * tm

)

static

Definition at line 865 of file cmdutils.c.

Referenced by init_report().

int opt_report ( const char * opt )

Definition at line 956 of file cmdutils.c.

int opt_max_alloc ( void * optctx,

const char * opt,

const char * arg

)

Definition at line 961 of file cmdutils.c.

int opt_timelimit ( void * optctx,

const char * opt,

const char * arg

)

Limit the execution time.

Definition at line 975 of file cmdutils.c.

void print_error ( const char * filename,

int err

)

Print an error message to stderr, indicating filename and a human readable description of the error code err.

If strerror_r() is not available the use of this function in a multithreaded application may be unsafe.

See Also: av_strerror()

Definition at line 988 of file cmdutils.c.

Referenced by open_input_file(), open_output_file(), process_input(), read_thread(), and write_frame().

static void print_all_libs_info ( int flags,

int level

)

static

Definition at line 1033 of file cmdutils.c.

Referenced by show_banner(), and show_version().

static void print_program_info ( int flags,

int level

)

static

Definition at line 1046 of file cmdutils.c.

Referenced by show_banner(), and show_version().

static void print_buildconf ( int flags,

int level

)

static

Definition at line 1061 of file cmdutils.c.

Referenced by show_buildconf().

void show_banner ( int argc,

char ** argv,

const OptionDef * options

)

Print the program banner to stderr.

The banner contents depend on the current version of the repository and of the libav* libraries used by the program.

Definition at line 1087 of file cmdutils.c.

Referenced by main().

int show_version ( void * optctx,

const char * opt,

const char * arg

)

Print the version of the program to stdout.

The version message depends on the current versions of the repository and of the libav* libraries. This option processing function does not utilize the arguments.

Definition at line 1098 of file cmdutils.c.

int show_buildconf ( void * optctx,

const char * opt,

const char * arg

)

Print the build configuration of the program to stdout.

The contents depend on the definition of FFMPEG_CONFIGURATION. This option processing function does not utilize the arguments.

Definition at line 1107 of file cmdutils.c.

int show_license ( void * optctx,

const char * opt,

const char * arg

)

Print the license of the program to stdout.

The license depends on the license of the libraries compiled into the program. This option processing function does not utilize the arguments.

Definition at line 1115 of file cmdutils.c.

int show_formats ( void * optctx,

const char * opt,

const char * arg

)

Print a listing containing all the formats supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1189 of file cmdutils.c.

static void print_codec ( const AVCodec * c )

static

Definition at line 1250 of file cmdutils.c.

Referenced by show_help_codec().

static char get_media_type_char ( enum AVMediaType type )

static

Definition at line 1297 of file cmdutils.c.

Referenced by print_codecs(), show_codecs(), and show_filters().

static const AVCodec* next_codec_for_id ( enum AVCodecID id,

const AVCodec * prev,

int encoder

)

static

Definition at line 1309 of file cmdutils.c.

Referenced by print_codecs(), print_codecs_for_id(), show_codecs(), and show_help_codec().

static int compare_codec_desc ( const void * a,

const void * b

)

static

Definition at line 1320 of file cmdutils.c.

Referenced by get_codecs_sorted().

static unsigned get_codecs_sorted ( const AVCodecDescriptor *** rcodecs )

static

Definition at line 1329 of file cmdutils.c.

Referenced by print_codecs(), and show_codecs().

static void print_codecs_for_id ( enum AVCodecID id,

int encoder

)

static

Definition at line 1350 of file cmdutils.c.

Referenced by show_codecs().

int show_codecs ( void * optctx,

const char * opt,

const char * arg

)

Print a listing containing all the codecs supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1362 of file cmdutils.c.

static void print_codecs ( int encoder )

static

Definition at line 1414 of file cmdutils.c.

Referenced by show_decoders(), and show_encoders().

int show_decoders ( void * optctx,

const char * opt,

const char * arg

)

Print a listing containing all the decoders supported by the program.

Definition at line 1452 of file cmdutils.c.

int show_encoders ( void * optctx,

const char * opt,

const char * arg

)

Print a listing containing all the encoders supported by the program.

Definition at line 1458 of file cmdutils.c.

int show_bsfs ( void * optctx,

const char * opt,

const char * arg

)

Print a listing containing all the bit stream filters supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1464 of file cmdutils.c.

int show_protocols ( void * optctx,

const char * opt,

const char * arg

)

Print a listing containing all the protocols supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1475 of file cmdutils.c.

int show_filters ( void * optctx,

const char * opt,

const char * arg

)

Print a listing containing all the filters supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1490 of file cmdutils.c.

int show_colors ( void * optctx,

const char * opt,

const char * arg

)

Print a listing containing all the color names and values recognized by the program.

Definition at line 1534 of file cmdutils.c.

int show_pix_fmts ( void * optctx,

const char * opt,

const char * arg

)

Print a listing containing all the pixel formats supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1548 of file cmdutils.c.

int show_layouts ( void * optctx,

const char * opt,

const char * arg

)

Print a listing containing all the standard channel layouts supported by the program.

This option processing function does not utilize the arguments.

Definition at line 1581 of file cmdutils.c.

int show_sample_fmts ( void * optctx,

const char * opt,

const char * arg

)

Print a listing containing all the sample formats supported by the program.

Definition at line 1610 of file cmdutils.c.

static void show_help_codec ( const char * name,

int encoder

)

static

Definition at line 1619 of file cmdutils.c.

Referenced by show_help().

static void show_help_demuxer ( const char * name )

static

Definition at line 1654 of file cmdutils.c.

Referenced by show_help().

static void show_help_muxer ( const char * name )

static

Definition at line 1672 of file cmdutils.c.

Referenced by show_help().

int show_help ( void * optctx,

const char * opt,

const char * arg

)

Generic -h handler common to all fftools.

Definition at line 1761 of file cmdutils.c.

int read_yesno ( void )

Return a positive value if a line read from standard input starts with [yY], otherwise return 0.

Definition at line 1793 of file cmdutils.c.

Referenced by assert_file_overwrite().

int cmdutils_read_file ( const char * filename,

char ** bufptr,

size_t * size

)

Read the file with name filename, and put its content in a newly allocated 0-terminated buffer.

Parameters: filename file to read from

bufptr location where pointer to buffer is returned

size location where size of buffer is returned

Returns: >= 0 in case of success, a negative value corresponding to an AVERROR error code in case of failure.

Definition at line 1804 of file cmdutils.c.

Referenced by transcode_init().

FILE* get_preset_file ( char * filename,

size_t filename_size,

const char * preset_name,

int is_path,

const char * codec_name

)

Get a file corresponding to a preset file.

If is_path is non-zero, look for the file in the path preset_name. Otherwise search for a file named arg.ffpreset in the directories $FFMPEG_DATADIR (if set), $HOME/.ffmpeg, and in the datadir defined at configuration time or in a "ffpresets" folder along the executable on win32, in that order. If no such file is found and codec_name is defined, then search for a file named codec_name-preset_name.avpreset in the above-mentioned directories.

Parameters: filename buffer where the name of the found filename is written

filename_size size in bytes of the filename buffer

preset_name name of the preset to search

is_path tell if preset_name is a filename path

codec_name name of the codec for which to look for the preset, may be NULL

Definition at line 1846 of file cmdutils.c.

Referenced by ffserver_opt_preset(), and opt_preset().

int check_stream_specifier ( AVFormatContext * s,

AVStream * st,

const char * spec

)

Check if the given stream matches a stream specifier.

Parameters: s Corresponding format context.

st Stream from s to be checked.

spec A stream specifier of the [v|a|s|d]:[<stream index>] form.

Returns: 1 if the stream matches, 0 if it doesn't, <0 on error

Definition at line 1896 of file cmdutils.c.

Referenced by copy_metadata(), filter_codec_opts(), init_input_filter(), open_input_file(), open_output_file(), and opt_map().

AVDictionary* filter_codec_opts ( AVDictionary * opts,

enum AVCodecID codec_id,

AVFormatContext * s,

AVStream * st,

AVCodec * codec

)

Filter out options for given codec.

Create a new options dictionary containing only the options from opts which apply to the codec with ID codec_id.

Parameters: opts dictionary to place options in

codec_id ID of the codec that should be filtered for

s Corresponding format context.

st A stream from s for which the options should be filtered.

codec The particular codec for which the options should be filtered. If null, the default one is looked up according to the codec id.

Returns: a pointer to the created dictionary

Definition at line 1904 of file cmdutils.c.

Referenced by add_input_streams(), new_output_stream(), open_input_file(), setup_find_stream_info_opts(), and stream_component_open().

AVDictionary** setup_find_stream_info_opts ( AVFormatContext * s,

AVDictionary * codec_opts

)

Setup AVCodecContext options for avformat_find_stream_info().

Create an array of dictionaries, one dictionary for each stream contained in s. Each dictionary will contain the options from codec_opts which can be applied to the corresponding stream codec context.

Returns: pointer to the created array of dictionaries, NULL if it cannot be created

Definition at line 1960 of file cmdutils.c.

Referenced by open_input_file(), and read_thread().

void* grow_array ( void * array,

int elem_size,

int * size,

int new_size

)

Realloc array to hold new_size elements of elem_size.

Calls exit() on failure.

Parameters: array array to reallocate

elem_size size in bytes of each element

size new element count will be written here

new_size number of elements to place in reallocated array