Option setting functions

Those functions set the field of obj with the given name to value. More...

Functions
int	av_opt_set (void *obj, const char *name, const char *val, int search_flags)
int	av_opt_set_int (void *obj, const char *name, int64_t val, int search_flags)
int	av_opt_set_double (void *obj, const char *name, double val, int search_flags)
int	av_opt_set_q (void *obj, const char *name, AVRational val, int search_flags)
int	av_opt_set_bin (void *obj, const char *name, const uint8_t *val, int size, int search_flags)
int	av_opt_set_image_size (void *obj, const char *name, int w, int h, int search_flags)
int	av_opt_set_pixel_fmt (void *obj, const char *name, enum AVPixelFormat fmt, int search_flags)
int	av_opt_set_sample_fmt (void *obj, const char *name, enum AVSampleFormat fmt, int search_flags)

Detailed Description

Those functions set the field of obj with the given name to value.

Parameters

[in]	obj	A struct whose first element is a pointer to an AVClass.
[in]	name	the name of the field to set
[in]	val	The value to set. In case of av_opt_set() if the field is not of a string type, then the given string is parsed. SI postfixes and some named scalars are supported. If the field is of a numeric type, it has to be a numeric or named scalar. Behavior with more than one scalar and +- infix operators is undefined. If the field is of a flags type, it has to be a sequence of numeric scalars or named flags separated by '+' or '-'. Prefixing a flag with '+' causes it to be set without affecting the other flags; similarly, '-' unsets a flag.
	search_flags	flags passed to av_opt_find2. I.e. if AV_OPT_SEARCH_CHILDREN is passed here, then the option may be set on a child of obj.

Returns

0 if the value has been set, or an AVERROR code in case of error: AVERROR_OPTION_NOT_FOUND if no matching option exists AVERROR(ERANGE) if the value is out of range AVERROR(EINVAL) if the value is not valid

Function Documentation

int av_opt_set	(	void *	obj,
		const char *	name,
		const char *	val,
		int	search_flags
	)

Definition at line 250 of file opt.c.

Referenced by av_opt_set_defaults2(), av_opt_set_dict(), av_opt_set_from_string(), av_set_string3(), avcodec_get_context_defaults3(), configure_filtergraph(), ffserver_opt_default(), filter_frame(), hls_start(), init(), mmsh_open_internal(), open_input(), open_output_file(), opt_default(), parse_key_value_pair(), rtmp_http_open(), segment_start(), url_alloc_for_protocol(), and video_encode_example().

int av_opt_set_int	(	void *	obj,
		const char *	name,
		int64_t	val,
		int	search_flags
	)

Definition at line 373 of file opt.c.

Referenced by av_opt_set_defaults2(), config_output(), config_props(), init(), main(), and swr_alloc_set_opts().

int av_opt_set_double	(	void *	obj,
		const char *	name,
		double	val,
		int	search_flags
	)

Definition at line 378 of file opt.c.

Referenced by av_opt_set_defaults2().

int av_opt_set_q	(	void *	obj,
		const char *	name,
		AVRational	val,
		int	search_flags
	)

Definition at line 383 of file opt.c.

Referenced by av_opt_set_defaults2().

int av_opt_set_bin	(	void *	obj,
		const char *	name,
		const uint8_t *	val,
		int	size,
		int	search_flags
	)

Definition at line 388 of file opt.c.

Referenced by rtmp_calc_swfhash(), rtmp_http_open(), and rtmp_http_send_cmd().

int av_opt_set_image_size	(	void *	obj,
		const char *	name,
		int	w,
		int	h,
		int	search_flags
	)

Definition at line 417 of file opt.c.

int av_opt_set_pixel_fmt	(	void *	obj,
		const char *	name,
		enum AVPixelFormat	fmt,
		int	search_flags
	)

Definition at line 476 of file opt.c.

Referenced by av_opt_set_defaults2().

int av_opt_set_sample_fmt	(	void *	obj,
		const char *	name,
		enum AVSampleFormat	fmt,
		int	search_flags
	)

Definition at line 481 of file opt.c.

Referenced by av_opt_set_defaults2(), and main().