Topics
	Preprocessor String Macros
	String manipulation macros
	Library Version Macros
	Useful to check and match library version in order to maintain backward compatibility.
	Constants
	Image related
	AVPicture types, pixel formats and basic image planes manipulation.
	Version and Build diagnostics
	Macros and function useful to check at compile time and at runtime which version of libavutil is in use.
	Media Type
	Media Type

Macros
#define	AV_FOURCC_MAX_STRING_SIZE 32
#define	av_fourcc2str(fourcc)

Enumerations
enum	AVMediaType { AVMEDIA_TYPE_UNKNOWN = -1 , AVMEDIA_TYPE_VIDEO , AVMEDIA_TYPE_AUDIO , AVMEDIA_TYPE_DATA , AVMEDIA_TYPE_SUBTITLE , AVMEDIA_TYPE_ATTACHMENT , AVMEDIA_TYPE_NB }

Functions
const char *	av_get_media_type_string (enum AVMediaType media_type)
	Return a string describing the media_type enum, NULL if media_type is unknown.
static void *	av_x_if_null (const void p, const void x)
	Return x default pointer in case p is NULL.
AVRational	av_get_time_base_q (void)
	Return the fractional representation of the internal time base.
char *	av_fourcc_make_string (char *buf, uint32_t fourcc)
	Fill the provided buffer with a string containing a FourCC (four-character code) representation.

Detailed Description

Macro Definition Documentation

◆ AV_FOURCC_MAX_STRING_SIZE

#define AV_FOURCC_MAX_STRING_SIZE 32

Definition at line 345 of file avutil.h.

◆ av_fourcc2str

#define av_fourcc2str ( fourcc )

Value:

av_fourcc_make_string((char[AV_FOURCC_MAX_STRING_SIZE]){0}, fourcc)

av_fourcc_make_string

char * av_fourcc_make_string(char *buf, uint32_t fourcc)

Fill the provided buffer with a string containing a FourCC (four-character code) representation.

AV_FOURCC_MAX_STRING_SIZE

#define AV_FOURCC_MAX_STRING_SIZE

Definition avutil.h:345

Definition at line 347 of file avutil.h.

Enumeration Type Documentation

◆ AVMediaType

enum AVMediaType

Enumerator
AVMEDIA_TYPE_UNKNOWN	Usually treated as AVMEDIA_TYPE_DATA.
AVMEDIA_TYPE_VIDEO
AVMEDIA_TYPE_AUDIO
AVMEDIA_TYPE_DATA	Opaque data information usually continuous.
AVMEDIA_TYPE_SUBTITLE
AVMEDIA_TYPE_ATTACHMENT	Opaque data information usually sparse.
AVMEDIA_TYPE_NB

Examples: demux_decode.c, and extract_mvs.c.

Definition at line 198 of file avutil.h.

Function Documentation

◆ av_get_media_type_string()

const char * av_get_media_type_string ( enum AVMediaType media_type )

Return a string describing the media_type enum, NULL if media_type is unknown.

Examples: demux_decode.c, and extract_mvs.c.

Referenced by open_codec_context(), and open_codec_context().

◆ av_x_if_null()

void * av_x_if_null	(	const void *	p,
		const void *	x )

inlinestatic

Return x default pointer in case p is NULL.

Examples: decode_filter_audio.c.

Definition at line 311 of file avutil.h.

Referenced by init_filters().

◆ av_get_time_base_q()

AVRational av_get_time_base_q ( void )

Return the fractional representation of the internal time base.

◆ av_fourcc_make_string()

char * av_fourcc_make_string	(	char *	buf,
		uint32_t	fourcc )