Collaboration diagram for Fragmented ISOBMFF Writing:

Macros
#define	GF_ISOM_FRAG_DEF_IS_SYNC 1

#define	GF_ISOM_FRAG_USE_SYNC_TABLE (1<<1)

Enumerations
enum	GF_ISOStartFragmentFlags { GF_ISOM_FRAG_MOOF_FIRST = 1 }

enum	GF_ISOTrackFragmentOption { GF_ISOM_TRAF_EMPTY , GF_ISOM_TRAF_RANDOM_ACCESS , GF_ISOM_TRAF_DATA_CACHE , GF_ISOM_TFHD_FORCE_MOOF_BASE_OFFSET , GF_ISOM_TRAF_USE_SAMPLE_DEPS_BOX , GF_ISOM_TRUN_FORCE , GF_ISOM_TRUN_SET_INTERLEAVE_ID , GF_ISOM_TRAF_TRUNS_FIRST , GF_ISOM_TRAF_TRUN_V1 , GF_ISOM_TRAF_USE_LARGE_TFDT }

Functions
GF_Err	gf_isom_setup_track_fragment (GF_ISOFile *isom_file, GF_ISOTrackID TrackID, u32 DefaultSampleDescriptionIndex, u32 DefaultSampleDuration, u32 DefaultSampleSize, u8 DefaultSampleSyncFlags, u8 DefaultSamplePadding, u16 DefaultDegradationPriority, Bool force_traf_flags)

GF_Err	gf_isom_change_track_fragment_defaults (GF_ISOFile *isom_file, GF_ISOTrackID TrackID, u32 DefaultSampleDescriptionIndex, u32 DefaultSampleDuration, u32 DefaultSampleSize, u8 DefaultSampleIsSync, u8 DefaultSamplePadding, u16 DefaultDegradationPriority, u8 force_traf_flags)

GF_Err	gf_isom_finalize_for_fragment (GF_ISOFile *isom_file, u32 media_segment_type, Bool mvex_after_tracks)

GF_Err	gf_isom_set_movie_duration (GF_ISOFile *isom_file, u64 duration, Bool remove_mehd)

GF_Err	gf_isom_start_fragment (GF_ISOFile *isom_file, GF_ISOStartFragmentFlags moof_first)

GF_Err	gf_isom_start_segment (GF_ISOFile isom_file, const char SegName, Bool memory_mode)

GF_Err	gf_isom_set_traf_base_media_decode_time (GF_ISOFile *isom_file, GF_ISOTrackID TrackID, u64 decode_time)

GF_Err	gf_isom_enable_mfra (GF_ISOFile *isom_file)

GF_Err	gf_isom_set_traf_mss_timeext (GF_ISOFile *isom_file, GF_ISOTrackID reference_track_ID, u64 decode_traf_time, u64 traf_duration)

GF_Err	gf_isom_close_segment (GF_ISOFile isom_file, s32 subsegs_per_sidx, GF_ISOTrackID referenceTrackID, u64 ref_track_decode_time, s32 timestamp_shift, u64 ref_track_next_cts, Bool daisy_chain_sidx, Bool use_ssix, Bool last_segment, Bool close_segment_handle, u32 segment_marker_4cc, u64 index_start_range, u64 index_end_range, u64 out_seg_size)

GF_Err	gf_isom_flush_fragments (GF_ISOFile *isom_file, Bool last_segment)

GF_Err	gf_isom_set_fragment_reference_time (GF_ISOFile *isom_file, GF_ISOTrackID reference_track_ID, u64 ntp, u64 timestamp)

GF_Err	gf_isom_allocate_sidx (GF_ISOFile isom_file, s32 subsegs_per_sidx, Bool daisy_chain_sidx, u32 nb_segs, u32 frags_per_segment, u32 start_range, u32 end_range, Bool use_ssix)

GF_Err	gf_isom_setup_track_fragment_template (GF_ISOFile isom_file, GF_ISOTrackID TrackID, u8 boxes, u32 boxes_size, u8 force_traf_flags)

GF_Err	gf_isom_set_fragment_original_duration (GF_ISOFile *isom_file, GF_ISOTrackID TrackID, u32 orig_dur, u32 elapsed_dur)

GF_Err	gf_isom_set_fragment_option (GF_ISOFile *isom_file, GF_ISOTrackID TrackID, GF_ISOTrackFragmentOption Code, u32 param)

GF_Err	gf_isom_fragment_add_sample (GF_ISOFile isom_file, GF_ISOTrackID TrackID, const GF_ISOSample sample, u32 sampleDescriptionIndex, u32 Duration, u8 PaddingBits, u16 DegradationPriority, Bool redundantCoding)

GF_Err	gf_isom_fragment_append_data (GF_ISOFile isom_file, GF_ISOTrackID TrackID, u8 data, u32 data_size, u8 PaddingBits)

GF_Err	gf_isom_fragment_set_cenc_sai (GF_ISOFile isom_file, GF_ISOTrackID trackID, u8 sai_b, u32 sai_b_size, Bool use_subsample, Bool use_saio_32bit, Bool use_multikey)

GF_Err	gf_isom_clone_pssh (GF_ISOFile dst_file, GF_ISOFile src_file, Bool in_moof)

GF_Err	gf_isom_fragment_set_sample_roll_group (GF_ISOFile *isom_file, GF_ISOTrackID trackID, u32 sample_number, GF_ISOSampleRollType roll_type, s16 roll_distance)

GF_Err	gf_isom_fragment_set_sample_rap_group (GF_ISOFile *isom_file, GF_ISOTrackID trackID, u32 sample_number_in_frag, Bool is_rap, u32 num_leading_samples)

GF_Err	gf_isom_fragment_set_sample_flags (GF_ISOFile *isom_file, GF_ISOTrackID trackID, u32 is_leading, u32 dependsOn, u32 dependedOn, u32 redundant)

GF_Err	gf_isom_fragment_set_sample_aux_info (GF_ISOFile isom_file, u32 trackID, u32 sample_number_in_frag, u32 aux_type, u32 aux_info, u8 data, u32 size)

void	gf_isom_set_next_moof_number (GF_ISOFile *isom_file, u32 value)

Detailed Description

                    Movie Fragments Writing API
            Movie Fragments is a feature of ISO media files for fragmentation
    of a presentation meta-data and interleaving with its media data.
    This enables faster http fast start for big movies, and also reduces the risk
    of data loss in case of a recording crash, because meta data and media data
    can be written to disk at regular times
            This API provides simple function calls to setup such a movie and write it
    The process implies:
            1- creating a movie in the usual way (track, stream descriptions, (IOD setup
    copyright, ...)
            2- possibly add some samples in the regular fashion
            3- setup track fragments for all track that will be written in a fragmented way
    (note that you can create/write a track that has no fragmentation at all)
            4- finalize the movie for fragmentation (this will flush all meta-data and
    any media-data added to disk, ensuring all vital information for the presentation
    is stored on file and not lost in case of crash/poweroff)

      then 5-6 as often as desired
            5- start a new movie fragment
            6- add samples to each setup track

IMPORTANT NOTES: Movie Fragments can only be used in GF_ISOM_OPEN_WRITE mode (capturing) and no editing functionalities can be used the fragmented movie API uses TrackID and not TrackNumber

Macro Definition Documentation

◆ GF_ISOM_FRAG_DEF_IS_SYNC

#define GF_ISOM_FRAG_DEF_IS_SYNC 1

flag indicating default samples are sync

◆ GF_ISOM_FRAG_USE_SYNC_TABLE

#define GF_ISOM_FRAG_USE_SYNC_TABLE (1<<1)

flag indicating a sync sample table shall be added in the track - cf CMAF rules

Enumeration Type Documentation

◆ GF_ISOStartFragmentFlags

enum GF_ISOStartFragmentFlags

fragment creatio option

Enumerator
GF_ISOM_FRAG_MOOF_FIRST	moof is stored before mdat - will require temporary storage of data in memory

◆ GF_ISOTrackFragmentOption

enum GF_ISOTrackFragmentOption

Track fragment options

Enumerator
GF_ISOM_TRAF_EMPTY	indicates that the track fragment has no samples but still has a duration (silence-detection in audio codecs, ...). param: indicates duration
GF_ISOM_TRAF_RANDOM_ACCESS	I-Frame detection: this can reduce file size by detecting I-frames and optimizing sample flags (padding, priority, ..) param: on/off (0/1)
GF_ISOM_TRAF_DATA_CACHE	activate data cache on track fragment. This is useful when writing interleaved media from a live source (typically audio-video), and greatly reduces file size param: Number of samples (> 1) to cache before disk flushing. You shouldn't try to cache too many samples since this will load your memory. base that on FPS/SR
GF_ISOM_TFHD_FORCE_MOOF_BASE_OFFSET	forces moof base offsets when traf based offsets would be chosen param: on/off (0/1)
GF_ISOM_TRAF_USE_SAMPLE_DEPS_BOX	use sdtp box in traf rather than storing sample deps in trun entry. param values are: 0: disables sdtp 1: enables sdtp and disables sample dependency flags in trun 2: enables sdtp and also use sample dependency flags in trun
GF_ISOM_TRUN_FORCE	forces new trun at next sample add param: ignored
GF_ISOM_TRUN_SET_INTERLEAVE_ID	sets interleave group ID of the next sample add. Samples with lower interleave ID will be stored first, creating new trun whenever a new group is detected This will enable data cache param: interleave ID
GF_ISOM_TRAF_TRUNS_FIRST	store truns before sample encryption and sample groups info param: 1 to store before and follow CMAF (recommended?) order, 0, to store after
GF_ISOM_TRAF_TRUN_V1	forces trun v1 param: on/off (0/1)
GF_ISOM_TRAF_USE_LARGE_TFDT

Function Documentation

◆ gf_isom_setup_track_fragment()

GF_Err gf_isom_setup_track_fragment	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	TrackID,
		u32	DefaultSampleDescriptionIndex,
		u32	DefaultSampleDuration,
		u32	DefaultSampleSize,
		u8	DefaultSampleSyncFlags,
		u8	DefaultSamplePadding,
		u16	DefaultDegradationPriority,
		Bool	force_traf_flags
	)

sets up a track for fragmentation by specifying some default values for storage efficiency

Note: If all the defaults are 0, traf flags will always be used to signal them.

Parameters

isom_file	the target ISO file
TrackID	ID of the target track
DefaultSampleDescriptionIndex	the default description used by samples in this track
DefaultSampleDuration	default duration of samples in this track
DefaultSampleSize	default size of samples in this track (0 if unknown)
DefaultSampleSyncFlags	combination of GF_ISOM_FRAG_* flags
DefaultSamplePadding	default padding bits for samples in this track
DefaultDegradationPriority	default degradation priority for samples in this track
force_traf_flags	if GF_TRUE, will ignore these default in each traf but will still write them in moov

Returns: error if any

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◆ gf_isom_change_track_fragment_defaults()

GF_Err gf_isom_change_track_fragment_defaults	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	TrackID,
		u32	DefaultSampleDescriptionIndex,
		u32	DefaultSampleDuration,
		u32	DefaultSampleSize,
		u8	DefaultSampleIsSync,
		u8	DefaultSamplePadding,
		u16	DefaultDegradationPriority,
		u8	force_traf_flags
	)

changes the default parameters of an existing trak fragment

Warning: This should not be used if samples have already been added

Parameters

isom_file	the target ISO file
TrackID	ID of the target track
DefaultSampleDescriptionIndex	the default description used by samples in this track
DefaultSampleDuration	default duration of samples in this track
DefaultSampleSize	default size of samples in this track (0 if unknown)
DefaultSampleIsSync	default key-flag (RAP) of samples in this track
DefaultSamplePadding	default padding bits for samples in this track
DefaultDegradationPriority	default degradation priority for samples in this track
force_traf_flags	if GF_TRUE, will ignore these default in each traf but will still write them in moov

Returns: error if any

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◆ gf_isom_finalize_for_fragment()

GF_Err gf_isom_finalize_for_fragment	(	GF_ISOFile *	isom_file,
		u32	media_segment_type,
		Bool	mvex_after_tracks
	)

flushes data to disk and prepare movie fragmentation

Parameters

isom_file	the target ISO file
media_segment_type	0 if no segments, 1 if regular segment, 2 if single segment
mvex_after_tracks	forces writing mvex box after track boxes

Returns: error if any

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◆ gf_isom_set_movie_duration()

GF_Err gf_isom_set_movie_duration	(	GF_ISOFile *	isom_file,
		u64	duration,
		Bool	remove_mehd
	)

sets the duration of the movie in case of movie fragments

Parameters

isom_file	the target ISO file
duration	the complete duration (movie and all fragments) in movie timescale
remove_mehd	force removal of mehd box, only setting mvhd.duration to 0

Returns: error if any

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◆ gf_isom_start_fragment()

GF_Err gf_isom_start_fragment	(	GF_ISOFile *	isom_file,
		GF_ISOStartFragmentFlags	moof_first
	)

starts a new movie fragment

Parameters

isom_file	the target ISO file
moof_first	if GF_TRUE, the moof will be written before the mdat

Returns: error if any

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◆ gf_isom_start_segment()

GF_Err gf_isom_start_segment	(	GF_ISOFile *	isom_file,
		const char *	SegName,
		Bool	memory_mode
	)

starts a new segment in the file

Parameters

isom_file	the target ISO file
SegName	if not NULL, the output will be written in the SegName file. If NULL, segment will be created in same file as movie. The special name "_gpac_isobmff_redirect" is used to indicate that segment shall be written to a memory buffer passed to callback function set through gf_isom_set_write_callback
memory_mode	if set, all samples writing is done in memory rather than on disk. Ignored in callback mode

Returns: error if any

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◆ gf_isom_set_traf_base_media_decode_time()

GF_Err gf_isom_set_traf_base_media_decode_time	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	TrackID,
		u64	decode_time
	)

sets the baseMediaDecodeTime of the first sample of the given track

Parameters

isom_file	the target ISO file
TrackID	ID of the target track
decode_time	the decode time in media timescale

Returns: error if any

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◆ gf_isom_enable_mfra()

GF_Err gf_isom_enable_mfra ( GF_ISOFile * isom_file )

enables mfra (movie fragment random access computing) when writing movie fragments

Note: this should only be used when generating segments in a single file

Parameters

isom_file the target ISO file

Returns: error if any

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◆ gf_isom_set_traf_mss_timeext()

GF_Err gf_isom_set_traf_mss_timeext	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	reference_track_ID,
		u64	decode_traf_time,
		u64	traf_duration
	)

sets Microsoft Smooth Streaming traf 'tfxd' box info, written at the end of each traf

Parameters

isom_file	the target ISO file
reference_track_ID	ID of the reference track giving the media timescale
decode_traf_time	decode time of the first sample in the segment in media timescale (hardcoded to 10MHz in Smooth)
traf_duration	duration of all samples in the traf in media timescale (hardcoded to 10MHz in Smooth)

Returns: error if any

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◆ gf_isom_close_segment()

GF_Err gf_isom_close_segment	(	GF_ISOFile *	isom_file,
		s32	subsegs_per_sidx,
		GF_ISOTrackID	referenceTrackID,
		u64	ref_track_decode_time,
		s32	timestamp_shift,
		u64	ref_track_next_cts,
		Bool	daisy_chain_sidx,
		Bool	use_ssix,
		Bool	last_segment,
		Bool	close_segment_handle,
		u32	segment_marker_4cc,
		u64 *	index_start_range,
		u64 *	index_end_range,
		u64 *	out_seg_size
	)

closes current segment, producing a segment index box if desired

Parameters

isom_file	the target ISO file
subsegs_per_sidx	number of subsegments per sidx box; a negative value disables sidx, 0 forces a single sidx for the segment (or subsegment)
referenceTrackID	the ID of the track used as a reference for the segment index box
ref_track_decode_time	the decode time fo the first sample in the reference track for this segment
timestamp_shift	the constant difference between media time and presentation time (derived from edit list)
ref_track_next_cts	the CTS of the first sample in the reference track in the next segment
daisy_chain_sidx	if GF_TRUE, indicates chained sidx shall be used. Otherwise, an array of indexes is used
use_ssix	if GF_TRUE, produces an ssix box using I-frames as first level and all other frames as second level
last_segment	indicates if this is the last segment of the session
close_segment_handle	if set to GF_TRUE, the associated file if any will be closed
segment_marker_4cc	a four character code used to insert an empty box at the end of the saegment with the given type. If 0, no such box is inserted
index_start_range	set to the start offset in bytes of the segment in the media file
index_end_range	set to the end offset in bytes of the segment in the media file
out_seg_size	set to the segment size in bytes (optional, can be NULL)

Returns: error if any

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◆ gf_isom_flush_fragments()

GF_Err gf_isom_flush_fragments	(	GF_ISOFile *	isom_file,
		Bool	last_segment
	)

writes any pending fragment to file for low-latency output.

Warning: This shall only be used if no SIDX is used: subsegs_per_sidx<0 or flushing all fragments before calling gf_isom_close_segment

Parameters

isom_file	the target ISO file
last_segment	indicates if this is the last segment of the session

Returns: error if any

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◆ gf_isom_set_fragment_reference_time()

GF_Err gf_isom_set_fragment_reference_time	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	reference_track_ID,
		u64	ntp,
		u64	timestamp
	)

sets fragment prft box info, written just before the moof

Parameters

isom_file	the target ISO file
reference_track_ID	the ID of the track used as a reference for media timestamps
ntp	absolute NTP time
timestamp	media time corresponding to the NTP time, in reference track media timescale

Returns: error if any

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◆ gf_isom_allocate_sidx()

GF_Err gf_isom_allocate_sidx	(	GF_ISOFile *	isom_file,
		s32	subsegs_per_sidx,
		Bool	daisy_chain_sidx,
		u32	nb_segs,
		u32 *	frags_per_segment,
		u32 *	start_range,
		u32 *	end_range,
		Bool	use_ssix
	)

writes an empty sidx in the current movie.

The SIDX will be forced to have nb_segs entries, and nb_segs shall match the number of calls to gf_isom_close_segment that will follow. This avoids wasting time and disk space moving data around. Once gf_isom_close_segment has then been called nb_segs times, the pre-allocated SIDX is destroyed and successive calls to gf_isom_close_segment will create their own sidx, unless gf_isom_allocate_sidx is called again.

Parameters

isom_file	the target ISO file
subsegs_per_sidx	reserved to 0, currently ignored
daisy_chain_sidx	reserved to 0, currently ignored
nb_segs	number of entries in the segment index
frags_per_segment	reserved, currently ignored
start_range	set to the start offset in bytes of the segment index box
end_range	set to the end offset in bytes of the segment index box
use_ssix	if GF_TRUE, produces an ssix box using I-frames as first level and all other frames as second level

Returns: error if any

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◆ gf_isom_setup_track_fragment_template()

GF_Err gf_isom_setup_track_fragment_template	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	TrackID,
		u8 *	boxes,
		u32	boxes_size,
		u8	force_traf_flags
	)

sets up track fragment defaults using the given template. The template shall be a serialized array of one or more trex boxes

Parameters

isom_file	the target ISO file
TrackID	ID of the target track
boxes	serialized array of trex boxes
boxes_size	size of the serialized array
force_traf_flags	if GF_TRUE, will ignore these default in each traf but will still write them in moov

Returns: error if any

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◆ gf_isom_set_fragment_original_duration()

GF_Err gf_isom_set_fragment_original_duration	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	TrackID,
		u32	orig_dur,
		u32	elapsed_dur
	)

sets up track fragment defaults using the given template. The template shall be a serialized array of one or more trex boxes

Parameters

isom_file	the target ISO file
TrackID	ID of the target track
orig_dur	last sample original duration
elapsed_dur	first sample elapsed duration

Returns: error if any

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◆ gf_isom_set_fragment_option()

GF_Err gf_isom_set_fragment_option	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	TrackID,
		GF_ISOTrackFragmentOption	Code,
		u32	param
	)

sets a track fragment option. Options can be set at the beginning of each new fragment only, and for the lifetime of the fragment

Parameters

isom_file	the target ISO file
TrackID	ID of the target track
Code	the option type to set
param	the option value

Returns: error if any

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◆ gf_isom_fragment_add_sample()

GF_Err gf_isom_fragment_add_sample	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	TrackID,
		const GF_ISOSample *	sample,
		u32	sampleDescriptionIndex,
		u32	Duration,
		u8	PaddingBits,
		u16	DegradationPriority,
		Bool	redundantCoding
	)

adds a sample to a fragmented track

Parameters

isom_file	the target ISO file
TrackID	destination track
sample	sample to add
sampleDescriptionIndex	sample description for this sample. If 0, the default one is used
Duration	sample duration; the sample duration MUST be provided at least for the last sample (for intermediate samples, it is recomputed internally by the lib)
PaddingBits	padding bits for the sample, or 0
DegradationPriority	for the sample, or 0
redundantCoding	indicates this is samples acts as a sync shadow point

Returns: error if any

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◆ gf_isom_fragment_append_data()

GF_Err gf_isom_fragment_append_data	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	TrackID,
		u8 *	data,
		u32	data_size,
		u8	PaddingBits
	)

appends data into last sample of track for video fragments/other media

Warning: This shall not be used with OD tracks

Parameters

isom_file	the target ISO file
TrackID	destination track
data	the data to append
data_size	the size of the data to append
PaddingBits	padding bits for the sample, or 0

Returns: error if any

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◆ gf_isom_fragment_set_cenc_sai()

GF_Err gf_isom_fragment_set_cenc_sai	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	trackID,
		u8 *	sai_b,
		u32	sai_b_size,
		Bool	use_subsample,
		Bool	use_saio_32bit,
		Bool	use_multikey
	)

sets side information for common encryption for the last added sample

Parameters

isom_file	the target ISO file
trackID	the ID of the target track
sai_b	buffer containing the SAI information of the sample
sai_b_size	size of the SAI buffer. If sai_b is NULL or sai_b_size is 0, add a clear SAI data
use_subsample	indicates if the media uses CENC subsamples
use_saio_32bit	indicates if 32-bit saio shall be used
use_multikey	indicates if multikey is in use (required to tag saiz/saio boxes)

Returns: error if any

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◆ gf_isom_clone_pssh()

GF_Err gf_isom_clone_pssh	(	GF_ISOFile *	dst_file,
		GF_ISOFile *	src_file,
		Bool	in_moof
	)

clones PSSH data between two files

Parameters

dst_file	the target ISO file
src_file	the source ISO file
in_moof	if GF_TRUE, indicates the pssh should be cloned in current moof box

Returns: error if any

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◆ gf_isom_fragment_set_sample_roll_group()

GF_Err gf_isom_fragment_set_sample_roll_group	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	trackID,
		u32	sample_number,
		GF_ISOSampleRollType	roll_type,
		s16	roll_distance
	)

sets roll information for a sample in a track fragment

Parameters

isom_file	the target ISO file
trackID	the ID of the target track
sample_number	the sample number of the last sample
roll_type	indicate the sample roll type
roll_distance	set to the roll distance for a roll sample

Returns: error if any

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◆ gf_isom_fragment_set_sample_rap_group()

GF_Err gf_isom_fragment_set_sample_rap_group	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	trackID,
		u32	sample_number_in_frag,
		Bool	is_rap,
		u32	num_leading_samples
	)

sets rap information for a sample in a track fragment

Parameters

isom_file	the target ISO file
trackID	the ID of the target track
sample_number_in_frag	the sample number of the sample in the traf
is_rap	set to GF_TRUE to indicate the sample is a RAP sample (open-GOP), GF_FALSE otherwise
num_leading_samples	set to the number of leading pictures for a RAP sample

Returns: error if any

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◆ gf_isom_fragment_set_sample_flags()

GF_Err gf_isom_fragment_set_sample_flags	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	trackID,
		u32	is_leading,
		u32	dependsOn,
		u32	dependedOn,
		u32	redundant
	)

sets sample dependency flags in a track fragment - see ISO/IEC 14496-12 and gf_filter_pck_set_dependency_flags

Parameters

isom_file	the target ISO file
trackID	the ID of the target track
is_leading	indicates that the sample is a leading picture
dependsOn	indicates the sample dependency towards other samples
dependedOn	indicates the sample dependency from other samples
redundant	indicates that the sample contains redundant coding

Returns: error if any

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◆ gf_isom_fragment_set_sample_aux_info()

GF_Err gf_isom_fragment_set_sample_aux_info	(	GF_ISOFile *	isom_file,
		u32	trackID,
		u32	sample_number_in_frag,
		u32	aux_type,
		u32	aux_info,
		u8 *	data,
		u32	size
	)

adds sample auxiliary data

Parameters

isom_file	the target ISO file
trackID	the ID of the target track
sample_number_in_frag	the sample number in the current fragment. Must be equal or larger to last auxiliary added
aux_type	auxiliary sample data type, shall not be 0
aux_info	auxiliary sample data specific info type, may be 0
data	data to add
size	size of data to add

Returns: error if any

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◆ gf_isom_set_next_moof_number()

void gf_isom_set_next_moof_number	(	GF_ISOFile *	isom_file,
		u32	value
	)

sets the number of the next moof to be produced

Parameters

isom_file	the target ISO file
value	the number of the next moof

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Macros

Enumerations

Functions

Detailed Description

Macro Definition Documentation

◆ GF_ISOM_FRAG_DEF_IS_SYNC

◆ GF_ISOM_FRAG_USE_SYNC_TABLE

Enumeration Type Documentation

◆ GF_ISOStartFragmentFlags

◆ GF_ISOTrackFragmentOption

Function Documentation

◆ gf_isom_setup_track_fragment()

◆ gf_isom_change_track_fragment_defaults()

◆ gf_isom_finalize_for_fragment()

◆ gf_isom_set_movie_duration()

◆ gf_isom_start_fragment()

◆ gf_isom_start_segment()

◆ gf_isom_set_traf_base_media_decode_time()

◆ gf_isom_enable_mfra()

◆ gf_isom_set_traf_mss_timeext()

◆ gf_isom_close_segment()

◆ gf_isom_flush_fragments()

◆ gf_isom_set_fragment_reference_time()

◆ gf_isom_allocate_sidx()

◆ gf_isom_setup_track_fragment_template()

◆ gf_isom_set_fragment_original_duration()

◆ gf_isom_set_fragment_option()

◆ gf_isom_fragment_add_sample()

◆ gf_isom_fragment_append_data()

◆ gf_isom_fragment_set_cenc_sai()

◆ gf_isom_clone_pssh()

◆ gf_isom_fragment_set_sample_roll_group()

◆ gf_isom_fragment_set_sample_rap_group()

◆ gf_isom_fragment_set_sample_flags()

◆ gf_isom_fragment_set_sample_aux_info()

◆ gf_isom_set_next_moof_number()