Graph-based frame editing library. Подробнее...

Граф связей класса libavfilter:

Группы
	Buffer sink API

	Buffer source API

Файлы
файл	avfilter.h

файл	version.h

Классы
struct	AVFilter

struct	AVFilterContext

struct	AVFilterLink

struct	AVFilterGraph

struct	AVFilterInOut

Определения типов
typedef struct AVFilterContext	AVFilterContext

typedef struct AVFilterLink	AVFilterLink

typedef struct AVFilterPad	AVFilterPad

typedef struct AVFilterFormats	AVFilterFormats

typedef struct AVFilter	AVFilter

typedef struct AVFilterInternal	AVFilterInternal

typedef struct AVFilterGraphInternal	AVFilterGraphInternal

typedef int()	avfilter_action_func(AVFilterContext ctx, void arg, int jobnr, int nb_jobs)

typedef int()	avfilter_execute_func(AVFilterContext ctx, avfilter_action_func func, void arg, int ret, int nb_jobs)

typedef struct AVFilterGraph	AVFilterGraph

typedef struct AVFilterInOut	AVFilterInOut

Перечисления
enum	{ AVFILTER_AUTO_CONVERT_ALL = 0, AVFILTER_AUTO_CONVERT_NONE = -1 }

Функции
unsigned	avfilter_version (void)

const char *	avfilter_configuration (void)

const char *	avfilter_license (void)

int	avfilter_pad_count (const AVFilterPad *pads)

const char *	avfilter_pad_get_name (const AVFilterPad *pads, int pad_idx)

enum AVMediaType	avfilter_pad_get_type (const AVFilterPad *pads, int pad_idx)

int	avfilter_link (AVFilterContext src, unsigned srcpad, AVFilterContext dst, unsigned dstpad)

void	avfilter_link_free (AVFilterLink **link)

attribute_deprecated int	avfilter_link_get_channels (AVFilterLink *link)

attribute_deprecated void	avfilter_link_set_closed (AVFilterLink *link, int closed)

int	avfilter_config_links (AVFilterContext *filter)

int	avfilter_process_command (AVFilterContext filter, const char cmd, const char arg, char res, int res_len, int flags)

const AVFilter *	av_filter_iterate (void **opaque)

attribute_deprecated void	avfilter_register_all (void)

attribute_deprecated int	avfilter_register (AVFilter *filter)

const attribute_deprecated AVFilter *	avfilter_next (const AVFilter *prev)

const AVFilter *	avfilter_get_by_name (const char *name)

int	avfilter_init_str (AVFilterContext ctx, const char args)

int	avfilter_init_dict (AVFilterContext ctx, AVDictionary *options)

void	avfilter_free (AVFilterContext *filter)

int	avfilter_insert_filter (AVFilterLink link, AVFilterContext filt, unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)

const AVClass *	avfilter_get_class (void)

AVFilterGraph *	avfilter_graph_alloc (void)

AVFilterContext *	avfilter_graph_alloc_filter (AVFilterGraph graph, const AVFilter filter, const char *name)

AVFilterContext *	avfilter_graph_get_filter (AVFilterGraph graph, const char name)

int	avfilter_graph_create_filter (AVFilterContext *filt_ctx, const AVFilter filt, const char name, const char args, void opaque, AVFilterGraph graph_ctx)

void	avfilter_graph_set_auto_convert (AVFilterGraph *graph, unsigned flags)

int	avfilter_graph_config (AVFilterGraph graphctx, void log_ctx)

void	avfilter_graph_free (AVFilterGraph **graph)

AVFilterInOut *	avfilter_inout_alloc (void)

void	avfilter_inout_free (AVFilterInOut **inout)

int	avfilter_graph_parse (AVFilterGraph graph, const char filters, AVFilterInOut inputs, AVFilterInOut outputs, void *log_ctx)

int	avfilter_graph_parse_ptr (AVFilterGraph graph, const char filters, AVFilterInOut inputs, AVFilterInOut outputs, void *log_ctx)

int	avfilter_graph_parse2 (AVFilterGraph graph, const char filters, AVFilterInOut inputs, AVFilterInOut outputs)

int	avfilter_graph_send_command (AVFilterGraph graph, const char target, const char cmd, const char arg, char *res, int res_len, int flags)

int	avfilter_graph_queue_command (AVFilterGraph graph, const char target, const char cmd, const char arg, int flags, double ts)

char *	avfilter_graph_dump (AVFilterGraph graph, const char options)

int	avfilter_graph_request_oldest (AVFilterGraph *graph)

Подробное описание

Graph-based frame editing library.

Типы

◆ AVFilterContext

typedef struct AVFilterContext AVFilterContext

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

См. определение в файле avfilter.h строка 67

◆ AVFilterLink

typedef struct AVFilterLink AVFilterLink

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

См. определение в файле avfilter.h строка 68

◆ AVFilterPad

typedef struct AVFilterPad AVFilterPad

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

См. определение в файле avfilter.h строка 69

◆ AVFilterFormats

typedef struct AVFilterFormats AVFilterFormats

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

См. определение в файле avfilter.h строка 70

◆ AVFilter

typedef struct AVFilter AVFilter

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

Filter definition. This defines the pads a filter contains, and all the callback functions used to interact with the filter.

◆ AVFilterInternal

typedef struct AVFilterInternal AVFilterInternal

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

См. определение в файле avfilter.h строка 335

◆ AVFilterGraphInternal

typedef struct AVFilterGraphInternal AVFilterGraphInternal

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

См. определение в файле avfilter.h строка 809

◆ avfilter_action_func

typedef int() avfilter_action_func(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)

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

A function pointer passed to the AVFilterGraph::execute callback to be executed multiple times, possibly in parallel.

Аргументы

ctx	the filter context the job belongs to
arg	an opaque parameter passed through from AVFilterGraph::execute
jobnr	the index of the job being executed
nb_jobs	the total number of jobs

Возвращает: 0 on success, a negative AVERROR on error

См. определение в файле avfilter.h строка 823

◆ avfilter_execute_func

typedef int() avfilter_execute_func(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)

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

A function executing multiple jobs, possibly in parallel.

Аргументы

ctx	the filter context to which the jobs belong
func	the function to be called multiple times
arg	the argument to be passed to func
ret	a nb_jobs-sized array to be filled with return values from each invocation of func
nb_jobs	the number of jobs to execute

Возвращает: 0 on success, a negative AVERROR on error

См. определение в файле avfilter.h строка 837

◆ AVFilterGraph

typedef struct AVFilterGraph AVFilterGraph

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

◆ AVFilterInOut

typedef struct AVFilterInOut AVFilterInOut

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

A linked-list of the inputs/outputs of the filter chain.

This is mainly useful for avfilter_graph_parse() / avfilter_graph_parse2(), where it is used to communicate open (unlinked) inputs and outputs from and to the caller. This struct specifies, per each not connected pad contained in the graph, the filter context and the pad index required for establishing a link.

Перечисления

◆ anonymous enum

anonymous enum

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

Элементы перечислений
AVFILTER_AUTO_CONVERT_ALL	all automatic conversions enabled
AVFILTER_AUTO_CONVERT_NONE	all automatic conversions disabled

См. определение в файле avfilter.h строка 974

      {
     AVFILTER_AUTO_CONVERT_ALL  =  0, 
     AVFILTER_AUTO_CONVERT_NONE = -1, 
 };

Функции

◆ avfilter_version()

unsigned avfilter_version ( void )

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

Return the LIBAVFILTER_VERSION_INT constant.

◆ avfilter_configuration()

const char* avfilter_configuration ( void )

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

Return the libavfilter build-time configuration.

◆ avfilter_license()

const char* avfilter_license ( void )

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

Return the libavfilter license.

◆ avfilter_pad_count()

int avfilter_pad_count ( const AVFilterPad * pads )

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

Get the number of elements in a NULL-terminated array of AVFilterPads (e.g. AVFilter.inputs/outputs).

◆ avfilter_pad_get_name()

const char* avfilter_pad_get_name	(	const AVFilterPad *	pads,
		int	pad_idx
	)

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

Get the name of an AVFilterPad.

Аргументы

pads	an array of AVFilterPads
pad_idx	index of the pad in the array it; is the caller's responsibility to ensure the index is valid

Возвращает: name of the pad_idx'th pad in pads

◆ avfilter_pad_get_type()

enum AVMediaType avfilter_pad_get_type	(	const AVFilterPad *	pads,
		int	pad_idx
	)

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

Get the type of an AVFilterPad.

Аргументы

pads	an array of AVFilterPads
pad_idx	index of the pad in the array; it is the caller's responsibility to ensure the index is valid

Возвращает: type of the pad_idx'th pad in pads

◆ avfilter_link()

int avfilter_link	(	AVFilterContext *	src,
		unsigned	srcpad,
		AVFilterContext *	dst,
		unsigned	dstpad
	)

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

Link two filters together.

Аргументы

src	the source filter
srcpad	index of the output pad on the source filter
dst	the destination filter
dstpad	index of the input pad on the destination filter

Возвращает: zero on success

◆ avfilter_link_free()

void avfilter_link_free ( AVFilterLink ** link )

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

Free the link in *link, and set its pointer to NULL.

◆ avfilter_link_get_channels()

attribute_deprecated int avfilter_link_get_channels ( AVFilterLink * link )

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

Get the number of channels of a link.

Уст.:: Use av_buffersink_get_channels()

◆ avfilter_link_set_closed()

attribute_deprecated void avfilter_link_set_closed	(	AVFilterLink *	link,
		int	closed
	)

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

Set the closed field of a link.

Уст.:: applications are not supposed to mess with links, they should close the sinks.

◆ avfilter_config_links()

int avfilter_config_links ( AVFilterContext * filter )

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

Negotiate the media format, dimensions, etc of all inputs to a filter.

Аргументы

filter the filter to negotiate the properties for its inputs

Возвращает: zero on successful negotiation

◆ avfilter_process_command()

int avfilter_process_command	(	AVFilterContext *	filter,
		const char *	cmd,
		const char *	arg,
		char *	res,
		int	res_len,
		int	flags
	)

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

Make the filter instance process a command. It is recommended to use avfilter_graph_send_command().

◆ av_filter_iterate()

const AVFilter* av_filter_iterate ( void ** opaque )

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

Iterate over all registered filters.

Аргументы

opaque a pointer where libavfilter will store the iteration state. Must point to NULL to start the iteration.

Возвращает: the next registered filter or NULL when the iteration is finished

◆ avfilter_register_all()

attribute_deprecated void avfilter_register_all ( void )

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

Initialize the filter system. Register all builtin filters.

◆ avfilter_register()

attribute_deprecated int avfilter_register ( AVFilter * filter )

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

Register a filter. This is only needed if you plan to use avfilter_get_by_name later to lookup the AVFilter structure by name. A filter can still by instantiated with avfilter_graph_alloc_filter even if it is not registered.

Аргументы

filter the filter to register

Возвращает: 0 if the registration was successful, a negative value otherwise

◆ avfilter_next()

const attribute_deprecated AVFilter* avfilter_next ( const AVFilter * prev )

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

Iterate over all registered filters.

Возвращает: If prev is non-NULL, next registered filter after prev or NULL if prev is the last filter. If prev is NULL, return the first registered filter.

◆ avfilter_get_by_name()

const AVFilter* avfilter_get_by_name ( const char * name )

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

Get a filter definition matching the given name.

Аргументы

name	the filter name to find

Возвращает: the filter definition, if any matching one is registered. NULL if none found.

◆ avfilter_init_str()

int avfilter_init_str	(	AVFilterContext *	ctx,
		const char *	args
	)

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

Initialize a filter with the supplied parameters.

Аргументы

ctx	uninitialized filter context to initialize
args	Options to initialize the filter with. This must be a ':'-separated list of options in the 'key=value' form. May be NULL if the options have been set directly using the AVOptions API or there are no options that need to be set.

Возвращает: 0 on success, a negative AVERROR on failure

◆ avfilter_init_dict()

int avfilter_init_dict	(	AVFilterContext *	ctx,
		AVDictionary **	options
	)

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

Initialize a filter with the supplied dictionary of options.

Аргументы

ctx	uninitialized filter context to initialize
options	An AVDictionary filled with options for this filter. On return this parameter will be destroyed and replaced with a dict containing options that were not found. This dictionary must be freed by the caller. May be NULL, then this function is equivalent to avfilter_init_str() with the second parameter set to NULL.

Возвращает: 0 on success, a negative AVERROR on failure

Заметки: This function and avfilter_init_str() do essentially the same thing, the difference is in manner in which the options are passed. It is up to the calling code to choose whichever is more preferable. The two functions also behave differently when some of the provided options are not declared as supported by the filter. In such a case, avfilter_init_str() will fail, but this function will leave those extra options in the options AVDictionary and continue as usual.

◆ avfilter_free()

void avfilter_free ( AVFilterContext * filter )

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

Free a filter context. This will also remove the filter from its filtergraph's list of filters.

Аргументы

filter the filter to free

◆ avfilter_insert_filter()

int avfilter_insert_filter	(	AVFilterLink *	link,
		AVFilterContext *	filt,
		unsigned	filt_srcpad_idx,
		unsigned	filt_dstpad_idx
	)

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

Insert a filter in the middle of an existing link.

Аргументы

link	the link into which the filter should be inserted
filt	the filter to be inserted
filt_srcpad_idx	the input pad on the filter to connect
filt_dstpad_idx	the output pad on the filter to connect

Возвращает: zero on success

◆ avfilter_get_class()

const AVClass* avfilter_get_class ( void )

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

Возвращает: AVClass for AVFilterContext.

См. также: av_opt_find().

◆ avfilter_graph_alloc()

AVFilterGraph* avfilter_graph_alloc ( void )

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

Allocate a filter graph.

Возвращает: the allocated filter graph on success or NULL.

◆ avfilter_graph_alloc_filter()

AVFilterContext* avfilter_graph_alloc_filter	(	AVFilterGraph *	graph,
		const AVFilter *	filter,
		const char *	name
	)

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

Create a new filter instance in a filter graph.

Аргументы

graph	graph in which the new filter will be used
filter	the filter to create an instance of
name	Name to give to the new instance (will be copied to AVFilterContext.name). This may be used by the caller to identify different filters, libavfilter itself assigns no semantics to this parameter. May be NULL.

Возвращает: the context of the newly created filter instance (note that it is also retrievable directly through AVFilterGraph.filters or with avfilter_graph_get_filter()) on success or NULL on failure.

◆ avfilter_graph_get_filter()

AVFilterContext* avfilter_graph_get_filter	(	AVFilterGraph *	graph,
		const char *	name
	)

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

Get a filter instance identified by instance name from graph.

Аргументы

graph	filter graph to search through.
name	filter instance name (should be unique in the graph).

Возвращает: the pointer to the found filter instance or NULL if it cannot be found.

◆ avfilter_graph_create_filter()

int avfilter_graph_create_filter	(	AVFilterContext **	filt_ctx,
		const AVFilter *	filt,
		const char *	name,
		const char *	args,
		void *	opaque,
		AVFilterGraph *	graph_ctx
	)

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

Create and add a filter instance into an existing graph. The filter instance is created from the filter filt and inited with the parameters args and opaque.

In case of success put in *filt_ctx the pointer to the created filter instance, otherwise set *filt_ctx to NULL.

Аргументы

name	the instance name to give to the created filter instance
graph_ctx	the filter graph

Возвращает: a negative AVERROR error code in case of failure, a non negative value otherwise

◆ avfilter_graph_set_auto_convert()

void avfilter_graph_set_auto_convert	(	AVFilterGraph *	graph,
		unsigned	flags
	)

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

Enable or disable automatic format conversion inside the graph.

Note that format conversion can still happen inside explicitly inserted scale and aresample filters.

Аргументы

flags any of the AVFILTER_AUTO_CONVERT_* constants

◆ avfilter_graph_config()

int avfilter_graph_config	(	AVFilterGraph *	graphctx,
		void *	log_ctx
	)

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

Check validity and configure all the links and formats in the graph.

Аргументы

graphctx	the filter graph
log_ctx	context used for logging

Возвращает: >= 0 in case of success, a negative AVERROR code otherwise

◆ avfilter_graph_free()

void avfilter_graph_free ( AVFilterGraph ** graph )

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

Free a graph, destroy its links, and set *graph to NULL. If *graph is NULL, do nothing.

◆ avfilter_inout_alloc()

AVFilterInOut* avfilter_inout_alloc ( void )

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

Allocate a single AVFilterInOut entry. Must be freed with avfilter_inout_free().

Возвращает: allocated AVFilterInOut on success, NULL on failure.

◆ avfilter_inout_free()

void avfilter_inout_free ( AVFilterInOut ** inout )

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

Free the supplied list of AVFilterInOut and set *inout to NULL. If *inout is NULL, do nothing.

◆ avfilter_graph_parse()

int avfilter_graph_parse	(	AVFilterGraph *	graph,
		const char *	filters,
		AVFilterInOut *	inputs,
		AVFilterInOut *	outputs,
		void *	log_ctx
	)

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

Add a graph described by a string to a graph.

Заметки: The caller must provide the lists of inputs and outputs, which therefore must be known before calling the function.; The inputs parameter describes inputs of the already existing part of the graph; i.e. from the point of view of the newly created part, they are outputs. Similarly the outputs parameter describes outputs of the already existing filters, which are provided as inputs to the parsed filters.

Аргументы

graph	the filter graph where to link the parsed graph context
filters	string to be parsed
inputs	linked list to the inputs of the graph
outputs	linked list to the outputs of the graph

Возвращает: zero on success, a negative AVERROR code on error

◆ avfilter_graph_parse_ptr()

int avfilter_graph_parse_ptr	(	AVFilterGraph *	graph,
		const char *	filters,
		AVFilterInOut **	inputs,
		AVFilterInOut **	outputs,
		void *	log_ctx
	)

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

Add a graph described by a string to a graph.

In the graph filters description, if the input label of the first filter is not specified, "in" is assumed; if the output label of the last filter is not specified, "out" is assumed.

Аргументы

graph	the filter graph where to link the parsed graph context
filters	string to be parsed
inputs	pointer to a linked list to the inputs of the graph, may be NULL. If non-NULL, *inputs is updated to contain the list of open inputs after the parsing, should be freed with avfilter_inout_free().
outputs	pointer to a linked list to the outputs of the graph, may be NULL. If non-NULL, *outputs is updated to contain the list of open outputs after the parsing, should be freed with avfilter_inout_free().

Возвращает: non negative on success, a negative AVERROR code on error

◆ avfilter_graph_parse2()

int avfilter_graph_parse2	(	AVFilterGraph *	graph,
		const char *	filters,
		AVFilterInOut **	inputs,
		AVFilterInOut **	outputs
	)

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

Add a graph described by a string to a graph.

Аргументы

[in]	graph	the filter graph where to link the parsed graph context
[in]	filters	string to be parsed
[out]	inputs	a linked list of all free (unlinked) inputs of the parsed graph will be returned here. It is to be freed by the caller using avfilter_inout_free().
[out]	outputs	a linked list of all free (unlinked) outputs of the parsed graph will be returned here. It is to be freed by the caller using avfilter_inout_free().

Возвращает: zero on success, a negative AVERROR code on error

Заметки: This function returns the inputs and outputs that are left unlinked after parsing the graph and the caller then deals with them.; This function makes no reference whatsoever to already existing parts of the graph and the inputs parameter will on return contain inputs of the newly parsed part of the graph. Analogously the outputs parameter will contain outputs of the newly created filters.

◆ avfilter_graph_send_command()

int avfilter_graph_send_command	(	AVFilterGraph *	graph,
		const char *	target,
		const char *	cmd,
		const char *	arg,
		char *	res,
		int	res_len,
		int	flags
	)

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

Send a command to one or more filter instances.

Аргументы

graph	the filter graph
target	the filter(s) to which the command should be sent "all" sends to all filters otherwise it can be a filter or filter instance name which will send the command to all matching filters.
cmd	the command to send, for handling simplicity all commands must be alphanumeric only
arg	the argument for the command
res	a buffer with size res_size where the filter(s) can return a response.

Возвращает: >=0 on success otherwise an error code. AVERROR(ENOSYS) on unsupported commands

◆ avfilter_graph_queue_command()

int avfilter_graph_queue_command	(	AVFilterGraph *	graph,
		const char *	target,
		const char *	cmd,
		const char *	arg,
		int	flags,
		double	ts
	)

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

Queue a command for one or more filter instances.

Аргументы

graph	the filter graph
target	the filter(s) to which the command should be sent "all" sends to all filters otherwise it can be a filter or filter instance name which will send the command to all matching filters.
cmd	the command to sent, for handling simplicity all commands must be alphanumeric only
arg	the argument for the command
ts	time at which the command should be sent to the filter

Заметки: As this executes commands after this function returns, no return code from the filter is provided, also AVFILTER_CMD_FLAG_ONE is not supported.

◆ avfilter_graph_dump()

char* avfilter_graph_dump	(	AVFilterGraph *	graph,
		const char *	options
	)

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

Dump a graph into a human-readable string representation.

Аргументы

graph	the graph to dump
options	formatting options; currently ignored

Возвращает: a string, or NULL in case of memory allocation failure; the string must be freed using av_free

◆ avfilter_graph_request_oldest()

int avfilter_graph_request_oldest ( AVFilterGraph * graph )

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

Request a frame on the oldest sink link.

If the request returns AVERROR_EOF, try the next.

Note that this function is not meant to be the sole scheduling mechanism of a filtergraph, only a convenience function to help drain a filtergraph in a balanced way under normal circumstances.

Also note that AVERROR_EOF does not mean that frames did not arrive on some of the sinks during the process. When there are multiple sink links, in case the requested link returns an EOF, this may cause a filter to flush pending frames which are sent to another sink link, although unrequested.

Возвращает: the return value of ff_request_frame(), or AVERROR_EOF if all links returned AVERROR_EOF

Группы

Файлы

Классы

Определения типов

Перечисления

Функции

Подробное описание

Типы

◆ AVFilterContext

◆ AVFilterLink

◆ AVFilterPad

◆ AVFilterFormats

◆ AVFilter

◆ AVFilterInternal

◆ AVFilterGraphInternal

◆ avfilter_action_func

◆ avfilter_execute_func

◆ AVFilterGraph

◆ AVFilterInOut

Перечисления

◆ anonymous enum

Функции

◆ avfilter_version()

◆ avfilter_configuration()

◆ avfilter_license()

◆ avfilter_pad_count()

◆ avfilter_pad_get_name()

◆ avfilter_pad_get_type()

◆ avfilter_link()

◆ avfilter_link_free()

◆ avfilter_link_get_channels()

◆ avfilter_link_set_closed()

◆ avfilter_config_links()

◆ avfilter_process_command()

◆ av_filter_iterate()

◆ avfilter_register_all()

◆ avfilter_register()

◆ avfilter_next()

◆ avfilter_get_by_name()

◆ avfilter_init_str()

◆ avfilter_init_dict()

◆ avfilter_free()

◆ avfilter_insert_filter()

◆ avfilter_get_class()

◆ avfilter_graph_alloc()

◆ avfilter_graph_alloc_filter()

◆ avfilter_graph_get_filter()

◆ avfilter_graph_create_filter()

◆ avfilter_graph_set_auto_convert()

◆ avfilter_graph_config()

◆ avfilter_graph_free()

◆ avfilter_inout_alloc()

◆ avfilter_inout_free()

◆ avfilter_graph_parse()

◆ avfilter_graph_parse_ptr()

◆ avfilter_graph_parse2()

◆ avfilter_graph_send_command()

◆ avfilter_graph_queue_command()

◆ avfilter_graph_dump()

◆ avfilter_graph_request_oldest()