Option setting functions

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

Граф связей класса Option setting functions:

Функции
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)
int	av_opt_set_video_rate (void *obj, const char *name, AVRational val, int search_flags)
int	av_opt_set_channel_layout (void *obj, const char *name, int64_t ch_layout, int search_flags)
int	av_opt_set_dict_val (void *obj, const char *name, const AVDictionary *val, int search_flags)

Подробное описание

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

Аргументы

[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.

Возвращает

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

Функции

av_opt_set()

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

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/opt.h>

av_opt_set_int()

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

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/opt.h>

av_opt_set_double()

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

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/opt.h>

av_opt_set_q()

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

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/opt.h>

av_opt_set_bin()

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

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/opt.h>

av_opt_set_image_size()

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

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/opt.h>

av_opt_set_pixel_fmt()

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

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/opt.h>

av_opt_set_sample_fmt()

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

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/opt.h>

av_opt_set_video_rate()

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

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/opt.h>

av_opt_set_channel_layout()

int av_opt_set_channel_layout	(	void *	obj,
		const char *	name,
		int64_t	ch_layout,
		int	search_flags
	)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/opt.h>

av_opt_set_dict_val()

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

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/opt.h>

Заметки

Any old dictionary present is discarded and replaced with a copy of the new one. The caller still owns val is and responsible for freeing it.