Other

Modules
	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 compiletime and at runtime which version of libavutil is in use.
	Media Type
	Media Type.

Macros
#define	av_int_list_length(list, term)   av_int_list_length_for_size(sizeof(*(list)), list, term)
	Compute the length of an integer list. More...

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. More...
static void *	av_x_if_null (const void *p, const void *x)
	Return x default pointer in case p is NULL. More...
unsigned	av_int_list_length_for_size (unsigned elsize, const void *list, uint64_t term) av_pure
	Compute the length of an integer list. More...
FILE *	av_fopen_utf8 (const char *path, const char *mode)
	Open a file using a UTF-8 filename. More...
AVRational	av_get_time_base_q (void)
	Return the fractional representation of the internal time base. More...

Detailed Description

Macro Definition Documentation

#define av_int_list_length	(		list,
			term
	)		av_int_list_length_for_size(sizeof(*(list)), list, term)

Compute the length of an integer list.

Parameters

term	list terminator (usually 0 or -1)
list	pointer to the list

Returns

length of the list, in elements, not counting the terminator

Definition at line 323 of file avutil.h.

Enumeration Type Documentation

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

Definition at line 191 of file avutil.h.

Function Documentation

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:

demuxing_decoding.c.

Definition at line 79 of file utils.c.

Referenced by avcodec_string(), avfilter_link(), avi_write_header(), check_streamcopy_filters(), describe_frame_to_str(), find_stream(), flv_read_packet(), flv_write_header(), graph_check_validity(), log_slave(), mpeg_mux_init(), open_codec_context(), open_output_file(), process_input(), read_thread(), report_new_stream(), seg_write_header(), show_frame(), show_packet(), show_stream(), stream_cycle_channel(), and write_frame().

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

inlinestatic

Return x default pointer in case p is NULL.

Examples:

filtering_audio.c.

Definition at line 300 of file avutil.h.

Referenced by av_opt_get(), avcodec_open2(), avfilter_link(), avi_write_header(), compact_print_section_header(), data_open(), default_print_section_header(), device_try_init(), filter_frame(), ftp_connect(), init(), init_dict(), init_filters(), init_report(), init_video(), match_section(), opt_list(), parse_script(), print_link_prop(), and video_thread().

unsigned av_int_list_length_for_size	(	unsigned	elsize,
		const void *	list,
		uint64_t	term
	)

Compute the length of an integer list.

Parameters

elsize	size in bytes of each list element (only 1, 2, 4 or 8)
term	list terminator (usually 0 or -1)
list	pointer to the list

Returns

length of the list, in elements, not counting the terminator

Definition at line 105 of file utils.c.

FILE* av_fopen_utf8	(	const char *	path,
		const char *	mode
	)

Open a file using a UTF-8 filename.

The API of this function matches POSIX fopen(), errors are returned through errno.

Definition at line 95 of file file_open.c.

Referenced by disp_tree(), and new_video_stream().

AVRational av_get_time_base_q

(

void

)

Return the fractional representation of the internal time base.

Definition at line 124 of file utils.c.