Collaboration diagram for ISOBMFF Writing:

Typedefs
typedef GF_Err(*	gf_isom_on_block_out) (void usr_data, u8 block, u32 block_size, void *sample_cbk_data, u32 sample_cbk_magic)

typedef GF_Err(*	gf_isom_on_block_patch) (void usr_data, u8 block, u32 block_size, u64 block_offset, Bool is_insert)

typedef void(*	gf_isom_on_last_block_start) (void *usr_data)

Enumerations
enum	GF_ISOStorageMode { GF_ISOM_STORE_FLAT = 1 , GF_ISOM_STORE_STREAMABLE , GF_ISOM_STORE_INTERLEAVED , GF_ISOM_STORE_DRIFT_INTERLEAVED , GF_ISOM_STORE_TIGHT , GF_ISOM_STORE_FASTSTART }

enum	GF_ISOMTrackFlagOp { GF_ISOM_TKFLAGS_SET = 1 , GF_ISOM_TKFLAGS_REM , GF_ISOM_TKFLAGS_ADD }

enum	{ GF_ISOM_TK_ENABLED = 1 , GF_ISOM_TK_IN_MOVIE = 1<<1 , GF_ISOM_TK_IN_PREVIEW = 1<<2 , GF_ISOM_TK_SIZE_IS_AR = 1<<3 }

enum	GF_ISOCompressMode { GF_ISOM_COMP_NONE =0 , GF_ISOM_COMP_MOOV , GF_ISOM_COMP_MOOF , GF_ISOM_COMP_MOOF_SIDX , GF_ISOM_COMP_MOOF_SSIX , GF_ISOM_COMP_ALL }

enum	{ GF_ISOM_COMP_FORCE_ALL = 0x01 , GF_ISOM_COMP_WRAP_FTYPE = 0x02 }

enum	GF_AudioSampleEntryImportMode { GF_IMPORT_AUDIO_SAMPLE_ENTRY_NOT_SET = 0 , GF_IMPORT_AUDIO_SAMPLE_ENTRY_v0_BS , GF_IMPORT_AUDIO_SAMPLE_ENTRY_v0_2 , GF_IMPORT_AUDIO_SAMPLE_ENTRY_v1_MPEG , GF_IMPORT_AUDIO_SAMPLE_ENTRY_v1_QTFF }

enum	GF_ISOTrackCloneFlags { GF_ISOM_CLONE_TRACK_KEEP_DREF = 1 , GF_ISOM_CLONE_TRACK_NO_QT = 1<<1 , GF_ISOM_CLONE_TRACK_DROP_ID = 1<<2 , GF_ISOM_CLONE_RESET_DURATION = 1<<3 }

Functions
GF_Err	gf_isom_freeze_order (GF_ISOFile *isom_file)

void	gf_isom_keep_utc_times (GF_ISOFile *isom_file, Bool keep_utc)

Bool	gf_isom_has_keep_utc_times (GF_ISOFile *isom_file)

GF_Err	gf_isom_set_timescale (GF_ISOFile *isom_file, u32 timeScale)

GF_Err	gf_isom_load_extra_boxes (GF_ISOFile isom_file, u8 moov_boxes, u32 moov_boxes_size, Bool udta_only)

u32	gf_isom_new_track (GF_ISOFile *isom_file, GF_ISOTrackID trackID, u32 MediaType, u32 TimeScale)

u32	gf_isom_new_track_from_template (GF_ISOFile isom_file, GF_ISOTrackID trackID, u32 MediaType, u32 TimeScale, u8 tk_box, u32 tk_box_size, Bool udta_only)

GF_Err	gf_isom_remove_track (GF_ISOFile *isom_file, u32 trackNumber)

GF_Err	gf_isom_set_track_enabled (GF_ISOFile *isom_file, u32 trackNumber, Bool enableTrack)

GF_Err	gf_isom_set_track_flags (GF_ISOFile *isom_file, u32 trackNumber, u32 flags, GF_ISOMTrackFlagOp op)

GF_Err	gf_isom_set_creation_time (GF_ISOFile *isom_file, u64 create_time, u64 modif_time)

GF_Err	gf_isom_set_track_creation_time (GF_ISOFile *isom_file, u32 trackNumber, u64 create_time, u64 modif_time)

GF_Err	gf_isom_set_media_creation_time (GF_ISOFile *isom_file, u32 trackNumber, u64 create_time, u64 modif_time)

GF_Err	gf_isom_set_track_id (GF_ISOFile *isom_file, u32 trackNumber, GF_ISOTrackID trackID)

GF_Err	gf_isom_rewrite_track_dependencies (GF_ISOFile *isom_file, u32 trackNumber)

GF_Err	gf_isom_add_sample (GF_ISOFile isom_file, u32 trackNumber, u32 sampleDescriptionIndex, const GF_ISOSample sample)

GF_Err	gf_isom_copy_sample_info (GF_ISOFile dst, u32 dst_track, GF_ISOFile src, u32 src_track, u32 sampleNumber)

GF_Err	gf_isom_add_sample_shadow (GF_ISOFile isom_file, u32 trackNumber, GF_ISOSample sample)

GF_Err	gf_isom_append_sample_data (GF_ISOFile isom_file, u32 trackNumber, u8 data, u32 data_size)

GF_Err	gf_isom_add_sample_reference (GF_ISOFile isom_file, u32 trackNumber, u32 sampleDescriptionIndex, GF_ISOSample sample, u64 dataOffset)

GF_Err	gf_isom_set_last_sample_duration (GF_ISOFile *isom_file, u32 trackNumber, u32 duration)

GF_Err	gf_isom_set_last_sample_duration_ex (GF_ISOFile *isom_file, u32 trackNumber, u32 dur_num, u32 dur_den)

GF_Err	gf_isom_patch_last_sample_duration (GF_ISOFile *isom_file, u32 trackNumber, u64 next_dts)

GF_Err	gf_isom_set_track_reference (GF_ISOFile *isom_file, u32 trackNumber, u32 referenceType, GF_ISOTrackID ReferencedTrackID)

GF_Err	gf_isom_remove_track_references (GF_ISOFile *isom_file, u32 trackNumber)

GF_Err	gf_isom_purge_track_reference (GF_ISOFile *isom_file, u32 trackNumber)

GF_Err	gf_isom_remove_track_reference (GF_ISOFile *isom_file, u32 trackNumber, u32 ref_type)

GF_Err	gf_isom_set_handler_name (GF_ISOFile isom_file, u32 trackNumber, const char nameUTF8)

GF_Err	gf_isom_refresh_size_info (GF_ISOFile *isom_file, u32 trackNumber)

GF_Err	gf_isom_update_duration (GF_ISOFile *isom_file)

GF_Err	gf_isom_update_sample (GF_ISOFile isom_file, u32 trackNumber, u32 sampleNumber, GF_ISOSample sample, Bool data_only)

GF_Err	gf_isom_update_sample_reference (GF_ISOFile isom_file, u32 trackNumber, u32 sampleNumber, GF_ISOSample sample, u64 data_offset)

GF_Err	gf_isom_remove_sample (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleNumber)

GF_Err	gf_isom_set_media_timescale (GF_ISOFile *isom_file, u32 trackNumber, u32 new_timescale, u32 new_tsinc, u32 force_rescale_type)

GF_Err	gf_isom_add_sample_aux_info (GF_ISOFile isom_file, u32 trackNumber, u32 sampleNumber, u32 aux_type, u32 aux_info, u8 data, u32 size)

GF_Err	gf_isom_set_final_name (GF_ISOFile isom_file, char filename)

GF_Err	gf_isom_set_storage_mode (GF_ISOFile *isom_file, GF_ISOStorageMode storage_mode)

GF_Err	gf_isom_set_interleave_time (GF_ISOFile *isom_file, u32 InterleaveTime)

GF_Err	gf_isom_force_64bit_chunk_offset (GF_ISOFile *isom_file, Bool set_on)

GF_Err	gf_isom_enable_compression (GF_ISOFile *isom_file, GF_ISOCompressMode compress_mode, u32 compress_flags)

GF_Err	gf_isom_set_copyright (GF_ISOFile isom_file, const char threeCharCode, char *notice)

GF_Err	gf_isom_add_track_kind (GF_ISOFile isom_file, u32 trackNumber, const char schemeURI, const char *value)

GF_Err	gf_isom_remove_track_kind (GF_ISOFile isom_file, u32 trackNumber, const char schemeURI, const char *value)

GF_Err	gf_isom_set_media_type (GF_ISOFile *isom_file, u32 trackNumber, u32 new_type)

GF_Err	gf_isom_set_media_subtype (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleDescriptionIndex, u32 new_type)

GF_Err	gf_isom_set_alternate_group_id (GF_ISOFile *isom_file, u32 trackNumber, u32 groupId)

GF_Err	gf_isom_add_chapter (GF_ISOFile isom_file, u32 trackNumber, u64 timestamp, char name)

GF_Err	gf_isom_remove_chapter (GF_ISOFile *isom_file, u32 trackNumber, u32 index)

GF_Err	gf_isom_set_edit (GF_ISOFile *isom_file, u32 trackNumber, u64 EditTime, u64 EditDuration, u64 MediaTime, GF_ISOEditType EditMode)

GF_Err	gf_isom_set_edit_with_rate (GF_ISOFile *isom_file, u32 trackNumber, u64 EditTime, u64 EditDuration, u64 MediaTime, u32 MediaRate)

GF_Err	gf_isom_modify_edit (GF_ISOFile *isom_file, u32 trackNumber, u32 edit_index, u64 EditDuration, u64 MediaTime, GF_ISOEditType EditMode)

GF_Err	gf_isom_append_edit (GF_ISOFile *isom_file, u32 trackNumber, u64 EditDuration, u64 MediaTime, GF_ISOEditType EditMode)

GF_Err	gf_isom_remove_edits (GF_ISOFile *isom_file, u32 trackNumber)

GF_Err	gf_isom_remove_edit (GF_ISOFile *isom_file, u32 trackNumber, u32 edit_index)

GF_Err	gf_isom_update_edit_list_duration (GF_ISOFile *isom_file, u32 trackNumber)

GF_Err	gf_isom_remove_uuid (GF_ISOFile *isom_file, u32 trackNumber, bin128 UUID)

GF_Err	gf_isom_add_uuid (GF_ISOFile isom_file, u32 trackNumber, bin128 UUID, const u8 data, u32 size)

GF_Err	gf_isom_use_compact_size (GF_ISOFile *isom_file, u32 trackNumber, Bool CompactionOn)

GF_Err	gf_isom_disable_brand_rewrite (GF_ISOFile *isom_file, Bool do_disable)

GF_Err	gf_isom_set_brand_info (GF_ISOFile *isom_file, u32 MajorBrand, u32 MinorVersion)

GF_Err	gf_isom_modify_alternate_brand (GF_ISOFile *isom_file, u32 Brand, Bool AddIt)

GF_Err	gf_isom_reset_alt_brands (GF_ISOFile *isom_file)

GF_Err	gf_isom_reset_alt_brands_ex (GF_ISOFile *isom_file, Bool leave_empty)

GF_Err	gf_isom_set_sample_flags (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleNumber, u32 isLeading, u32 dependsOn, u32 dependedOn, u32 redundant)

GF_Err	gf_isom_set_visual_info (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleDescriptionIndex, u32 Width, u32 Height)

GF_Err	gf_isom_set_visual_bit_depth (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleDescriptionIndex, u16 bitDepth)

GF_Err	gf_isom_set_track_layout_info (GF_ISOFile *isom_file, u32 trackNumber, u32 width, u32 height, s32 translation_x, s32 translation_y, s16 layer)

GF_Err	gf_isom_set_track_matrix (GF_ISOFile *isom_file, u32 trackNumber, s32 matrix[9])

GF_Err	gf_isom_set_pixel_aspect_ratio (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleDescriptionIndex, s32 hSpacing, s32 vSpacing, Bool force_par)

GF_Err	gf_isom_set_clean_aperture (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleDescriptionIndex, u32 cleanApertureWidthN, u32 cleanApertureWidthD, u32 cleanApertureHeightN, u32 cleanApertureHeightD, s32 horizOffN, u32 horizOffD, s32 vertOffN, u32 vertOffD)

GF_Err	gf_isom_update_aperture_info (GF_ISOFile *isom_file, u32 trackNumber, Bool remove)

GF_Err	gf_isom_set_high_dynamic_range_info (GF_ISOFile isom_file, u32 trackNumber, u32 sampleDescriptionIndex, GF_MasteringDisplayColourVolumeInfo mdcv, GF_ContentLightLevelInfo *clli)

GF_Err	gf_isom_set_dolby_vision_profile (GF_ISOFile isom_file, u32 trackNumber, u32 sampleDescriptionIndex, GF_DOVIDecoderConfigurationRecord dvcc)

GF_Err	gf_isom_set_image_sequence_coding_constraints (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleDescriptionIndex, Bool remove, Bool all_ref_pics_intra, Bool intra_pred_used, u32 max_ref_per_pic)

GF_Err	gf_isom_set_image_sequence_alpha (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleDescriptionIndex, Bool remove)

GF_Err	gf_isom_set_visual_color_info (GF_ISOFile isom_file, u32 trackNumber, u32 sampleDescriptionIndex, u32 colour_type, u16 colour_primaries, u16 transfer_characteristics, u16 matrix_coefficients, Bool full_range_flag, u8 icc_data, u32 icc_size)

GF_Err	gf_isom_set_audio_info (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleDescriptionIndex, u32 sampleRate, u32 nbChannels, u8 bitsPerSample, GF_AudioSampleEntryImportMode asemode)

GF_Err	gf_isom_set_audio_layout (GF_ISOFile isom_file, u32 trackNumber, u32 sampleDescriptionIndex, GF_AudioChannelLayout layout)

GF_Err	gf_isom_set_cts_packing (GF_ISOFile *isom_file, u32 trackNumber, Bool unpack)

GF_Err	gf_isom_shift_cts_offset (GF_ISOFile *isom_file, u32 trackNumber, s32 offset_shift)

GF_Err	gf_isom_set_composition_offset_mode (GF_ISOFile *isom_file, u32 trackNumber, Bool use_negative_offsets)

GF_Err	gf_isom_set_ctts_v1 (GF_ISOFile *isom_file, u32 trackNumber, u32 ctts_shift)

GF_Err	gf_isom_set_media_language (GF_ISOFile isom_file, u32 trackNumber, char code)

GF_ISOTrackID	gf_isom_get_last_created_track_id (GF_ISOFile *isom_file)

GF_Err	gf_isom_apply_box_patch (GF_ISOFile isom_file, GF_ISOTrackID trackID, const char box_patch_filename, Bool for_fragments)

GF_Err	gf_isom_set_track_magic (GF_ISOFile *isom_file, u32 trackNumber, u64 magic)

GF_Err	gf_isom_set_track_index (GF_ISOFile isom_file, u32 trackNumber, u32 index, void(track_num_changed)(void udta, u32 old_track_num, u32 new_track_num), void udta)

GF_Err	gf_isom_remove_stream_description (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleDescriptionIndex)

GF_Err	gf_isom_update_bitrate (GF_ISOFile *isom_file, u32 trackNumber, u32 sampleDescriptionIndex, u32 average_bitrate, u32 max_bitrate, u32 decode_buffer_size)

GF_Err	gf_isom_clone_track (GF_ISOFile orig_file, u32 orig_track, GF_ISOFile dest_file, GF_ISOTrackCloneFlags flags, u32 *dest_track)

GF_Err	gf_isom_set_track_interleaving_group (GF_ISOFile *isom_file, u32 trackNumber, u32 GroupID)

GF_Err	gf_isom_set_track_priority_in_group (GF_ISOFile *isom_file, u32 trackNumber, u32 InversePriority)

GF_Err	gf_isom_hint_max_chunk_size (GF_ISOFile *isom_file, u32 trackNumber, u32 maxChunkSize)

GF_Err	gf_isom_hint_max_chunk_duration (GF_ISOFile *isom_file, u32 trackNumber, u32 maxChunkDur)

GF_Err	gf_isom_make_interleave (GF_ISOFile *isom_file, Double TimeInSec)

GF_Err	gf_isom_make_interleave_ex (GF_ISOFile isom_file, GF_Fraction fTimeInSec)

void	gf_isom_set_progress_callback (GF_ISOFile isom_file, void(progress_cbk)(void udta, u64 nb_done, u64 nb_total), void progress_cbk_udta)

GF_Err	gf_isom_set_write_callback (GF_ISOFile isom_file, gf_isom_on_block_out on_block_out, gf_isom_on_block_patch on_block_patch, gf_isom_on_last_block_start on_last_block_start, void usr_data, u32 block_size)

Bool	gf_isom_is_inplace_rewrite (GF_ISOFile *isom_file)

void	gf_isom_disable_inplace_rewrite (GF_ISOFile *isom_file)

GF_Err	gf_isom_set_inplace_padding (GF_ISOFile *isom_file, u32 padding)

Detailed Description

ISOBMF file writing

Typedef Documentation

◆ gf_isom_on_block_out

typedef GF_Err(* gf_isom_on_block_out) (void *usr_data, u8 *block, u32 block_size, void *sample_cbk_data, u32 sample_cbk_magic)

Callback function to receive new data blocks

Parameters

usr_data	user callback, as passed to gf_isom_set_write_callback
block	data block to write
block_size	data block size in bytes
sample_cbk_data	callback data of sample or NULL
sample_cbk_magic	callback magic of sample or 0

Returns: error if any

◆ gf_isom_on_block_patch

typedef GF_Err(* gf_isom_on_block_patch) (void *usr_data, u8 *block, u32 block_size, u64 block_offset, Bool is_insert)

Callback function to receive new data blocks, only used in non-fragmented mode:

to patch mdat size

to inject moov for GF_ISOM_STORE_FASTSTART mode

Parameters

usr_data	user callback, as passed to gf_isom_set_write_callback
block	data block to write
block_size	data block size in bytes
block_offset	offset in file for block to patch
is_insert	if GF_TRUE, indicates the bytes must be inserted at the given offset. Otherwise bytes are to be replaced

Returns: error if any

◆ gf_isom_on_last_block_start

typedef void(* gf_isom_on_last_block_start) (void *usr_data)

Callback function to indicate the last call to gf_isom_on_block_out is about to be produced for a segment, unused for non-fragmented or non-dash cases

Parameters

usr_data user callback, as passed to gf_isom_set_write_callback

Enumeration Type Documentation

◆ GF_ISOStorageMode

enum GF_ISOStorageMode

Movie Storage modes

Enumerator
GF_ISOM_STORE_FLAT	FLAT: the MediaData is stored at the beginning of the file
GF_ISOM_STORE_STREAMABLE	STREAMABLE: the MetaData (File Info) is stored at the beginning of the file for fast access during download
GF_ISOM_STORE_INTERLEAVED	INTERLEAVED: Same as STREAMABLE, plus the media data is mixed by chunk of fixed duration
GF_ISOM_STORE_DRIFT_INTERLEAVED	INTERLEAVED +DRIFT: Same as INTERLEAVED, and adds time drift control to avoid creating too long chunks
GF_ISOM_STORE_TIGHT	tightly interleaves samples based on their DTS, therefore allowing better placement of samples in the file. This is used for both http interleaving and Hinting optimizations
GF_ISOM_STORE_FASTSTART	FASTSTART: same as FLAT but moves moov before mdat at the end

◆ GF_ISOMTrackFlagOp

enum GF_ISOMTrackFlagOp

Track header flags operation type

Enumerator
GF_ISOM_TKFLAGS_SET	set flags, erasing previous value
GF_ISOM_TKFLAGS_REM	add flags
GF_ISOM_TKFLAGS_ADD	remove flags

◆ anonymous enum

anonymous enum

Track header flags

Enumerator
GF_ISOM_TK_ENABLED	track is enabled
GF_ISOM_TK_IN_MOVIE	track is in regular presentation
GF_ISOM_TK_IN_PREVIEW	track is in preview
GF_ISOM_TK_SIZE_IS_AR	track size is an aspect ratio indicator only

◆ GF_ISOCompressMode

enum GF_ISOCompressMode

compression mode of top-level boxes

Enumerator
GF_ISOM_COMP_NONE	no compression is used
GF_ISOM_COMP_MOOV	only moov box is compressed
GF_ISOM_COMP_MOOF	only moof boxes are compressed
GF_ISOM_COMP_MOOF_SIDX	only moof and sidx boxes are compressed
GF_ISOM_COMP_MOOF_SSIX	only moof, sidx and ssix boxes are compressed
GF_ISOM_COMP_ALL	all (moov, moof, sidx and ssix) boxes are compressed

◆ anonymous enum

anonymous enum

Enumerator
GF_ISOM_COMP_FORCE_ALL	forces compressed box even if compress size is larger than uncompressed size
GF_ISOM_COMP_WRAP_FTYPE	wraps ftyp in otyp

◆ GF_AudioSampleEntryImportMode

enum GF_AudioSampleEntryImportMode

Audio Sample Description signaling mode

Enumerator
GF_IMPORT_AUDIO_SAMPLE_ENTRY_NOT_SET	use ISOBMF sample entry v0
GF_IMPORT_AUDIO_SAMPLE_ENTRY_v0_BS	use ISOBMF sample entry v0
GF_IMPORT_AUDIO_SAMPLE_ENTRY_v0_2	use ISOBMF sample entry v0 and forces channel count to 2
GF_IMPORT_AUDIO_SAMPLE_ENTRY_v1_MPEG	use ISOBMF sample entry v1
GF_IMPORT_AUDIO_SAMPLE_ENTRY_v1_QTFF	use QTFF sample entry v1

◆ GF_ISOTrackCloneFlags

enum GF_ISOTrackCloneFlags

track clone flags

Enumerator
GF_ISOM_CLONE_TRACK_KEEP_DREF	set this flag to keep data reference entries while cloning track
GF_ISOM_CLONE_TRACK_NO_QT	set this flag to avoid cloning track as a QT track while cloning track
GF_ISOM_CLONE_TRACK_DROP_ID	drop track ID while importing
GF_ISOM_CLONE_RESET_DURATION	reset media duration when cloning

Function Documentation

◆ gf_isom_freeze_order()

GF_Err gf_isom_freeze_order ( GF_ISOFile * isom_file )

freezes order of the current box tree in the file. By default the library always reorder boxes in the recommended order in the various specifications implemented. New created tracks or meta items will not have a frozen order of boxes, but the function can be called several time

Parameters

isom_file the target ISO file

Returns: error if any

◆ gf_isom_keep_utc_times()

void gf_isom_keep_utc_times	(	GF_ISOFile *	isom_file,
		Bool	keep_utc
	)

keeps UTC edit times when storing

Parameters

isom_file	the target ISO file
keep_utc	if GF_TRUE, do not edit times

◆ gf_isom_has_keep_utc_times()

Bool gf_isom_has_keep_utc_times ( GF_ISOFile * isom_file )

Checks if UTC keeping is enabled

Parameters

isom_file the target ISO file

Returns: GF_TRUE if UTC keeping is enabled

◆ gf_isom_set_timescale()

GF_Err gf_isom_set_timescale	(	GF_ISOFile *	isom_file,
		u32	timeScale
	)

sets the timescale of the movie. This rescales times expressed in movie timescale in edit lists and mvex boxes

Parameters

isom_file	the target ISO file
timeScale	the target timescale

Returns: error if any

◆ gf_isom_load_extra_boxes()

GF_Err gf_isom_load_extra_boxes	(	GF_ISOFile *	isom_file,
		u8 *	moov_boxes,
		u32	moov_boxes_size,
		Bool	udta_only
	)

loads a set of top-level boxes in moov udta and child boxes. UDTA will be replaced if already present

Parameters

isom_file	the target ISO file
moov_boxes	a serialized array of boxes to add
moov_boxes_size	the size of the serialized array of boxes
udta_only	only replace/inject udta box and entries

Returns: error if any

◆ gf_isom_new_track()

u32 gf_isom_new_track	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	trackID,
		u32	MediaType,
		u32	TimeScale
	)

creates a new track

Parameters

isom_file	the target ISO file
trackID	the ID of the track - if 0, the track ID is chosen by the API
MediaType	the handler type (four character code) of the media
TimeScale	the time scale of the media

Returns: the track number or 0 if error

◆ gf_isom_new_track_from_template()

u32 gf_isom_new_track_from_template	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	trackID,
		u32	MediaType,
		u32	TimeScale,
		u8 *	tk_box,
		u32	tk_box_size,
		Bool	udta_only
	)

creates a new track from an encoded trak box.

Parameters

isom_file	the target ISO file
trackID	the ID of the track - if 0, the track ID is chosen by the API
MediaType	the handler type (four character code) of the media
TimeScale	the time scale of the media
tk_box	a serialized trak box to use as template
tk_box_size	the size of the serialized trak box
udta_only	only replace/inject udta box and entries

Returns: the track number or 0 if error

◆ gf_isom_remove_track()

GF_Err gf_isom_remove_track	(	GF_ISOFile *	isom_file,
		u32	trackNumber
	)

removes a track - internal cross dependencies will be updated.

Warning: Any OD streams with references to this track through ODUpdate, ESDUpdate, ESDRemove commands will be rewritten

Parameters

isom_file	the target ISO file
trackNumber	the target track to remove file

Returns: error if any

◆ gf_isom_set_track_enabled()

GF_Err gf_isom_set_track_enabled	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		Bool	enableTrack
	)

sets the enable flag of a track

Parameters

isom_file	the target ISO file
trackNumber	the target track
enableTrack	if GF_TRUE, track is enabled, otherwise disabled

Returns: error if any

◆ gf_isom_set_track_flags()

GF_Err gf_isom_set_track_flags	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	flags,
		GF_ISOMTrackFlagOp	op
	)

toggles track flags on or off

Parameters

isom_file	the target ISO file
trackNumber	the target track
flags	flags to modify
op	flag operation mode

Returns: error if any

◆ gf_isom_set_creation_time()

GF_Err gf_isom_set_creation_time	(	GF_ISOFile *	isom_file,
		u64	create_time,
		u64	modif_time
	)

sets creationTime and modificationTime of the movie to the specified dates (no validty check)

Parameters

isom_file	the target ISO file
create_time	the new creation time
modif_time	the new modification time

Returns: error if any

◆ gf_isom_set_track_creation_time()

GF_Err gf_isom_set_track_creation_time	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u64	create_time,
		u64	modif_time
	)

sets creationTime and modificationTime of the track to the specified dates

Parameters

isom_file	the target ISO file
trackNumber	the target track
create_time	the new creation time
modif_time	the new modification time

Returns: error if any

◆ gf_isom_set_media_creation_time()

GF_Err gf_isom_set_media_creation_time	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u64	create_time,
		u64	modif_time
	)

sets creationTime and modificationTime of the track media header to the specified dates

Parameters

isom_file	the target ISO file
trackNumber	the target track
create_time	the new creation time
modif_time	the new modification time

Returns: error if any

◆ gf_isom_set_track_id()

GF_Err gf_isom_set_track_id	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		GF_ISOTrackID	trackID
	)

changes the ID of a track - all track references present in the file are updated

Parameters

isom_file	the target ISO file
trackNumber	the target track
trackID	the new track ID

Returns: error if trackID is already in used in the file

◆ gf_isom_rewrite_track_dependencies()

GF_Err gf_isom_rewrite_track_dependencies	(	GF_ISOFile *	isom_file,
		u32	trackNumber
	)

forces to rewrite all dependencies when track ID changes. Used to check if track references are broken during import of a single track

Parameters

isom_file	the target ISO file
trackNumber	the target track

Returns: error if any

◆ gf_isom_add_sample()

GF_Err gf_isom_add_sample	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		const GF_ISOSample *	sample
	)

adds a sample to a track

Parameters

isom_file	the target ISO file
trackNumber	the target track
sampleDescriptionIndex	the target sample description index associated with the sample
sample	the target sample to add

Returns: error if any

◆ gf_isom_copy_sample_info()

GF_Err gf_isom_copy_sample_info	(	GF_ISOFile *	dst,
		u32	dst_track,
		GF_ISOFile *	src,
		u32	src_track,
		u32	sampleNumber
	)

copies all sample dependency, subSample and sample group information from the given sampleNumber in source file to the last added sample in dest file

Parameters

dst	the destination ISO file
dst_track	the destination track
src	the source ISO file
src_track	the source track
sampleNumber	the source sample number

Returns: error if any

◆ gf_isom_add_sample_shadow()

GF_Err gf_isom_add_sample_shadow	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		GF_ISOSample *	sample
	)

adds a sync shadow sample to a track.

There must be a regular sample with the same DTS.
Sync Shadow samples MUST be RAP and can only use the same sample description as the sample they shadow
Currently, adding sync shadow must be done in order (no sample insertion)

Parameters

isom_file	the target ISO file
trackNumber	the target track
sample	the target shadow sample to add

Returns: error if any

◆ gf_isom_append_sample_data()

GF_Err gf_isom_append_sample_data	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u8 *	data,
		u32	data_size
	)

adds data to current sample in the track. This will update the data size. CANNOT be used with OD media type There shall not be any other

Parameters

isom_file	the target ISO file
trackNumber	the target track
data	the data to append to the sample
data_size	the size of the data to append

Returns: error if any

◆ gf_isom_add_sample_reference()

GF_Err gf_isom_add_sample_reference	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		GF_ISOSample *	sample,
		u64	dataOffset
	)

adds sample references to a track

Parameters

isom_file	the target ISO file
trackNumber	the target track
sampleDescriptionIndex	the target sample description index associated with the sample
sample	the target sample to add
dataOffset	is the offset in bytes of the data in the referenced file.

Returns: error if any

◆ gf_isom_set_last_sample_duration()

GF_Err gf_isom_set_last_sample_duration	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	duration
	)

sets the duration of the last media sample. If not set, the duration of the last sample is the duration of the previous one if any, or media TimeScale (default value). This does not modify the edit list if any, you must modify this using gf_isom_set_edit

Parameters

isom_file	the target ISO file
trackNumber	the target track
duration	duration of last sample in media timescale

Returns: error if any

◆ gf_isom_set_last_sample_duration_ex()

GF_Err gf_isom_set_last_sample_duration_ex	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	dur_num,
		u32	dur_den
	)

sets the duration of the last media sample. If not set, the duration of the last sample is the duration of the previous one if any, or media TimeScale (default value). This does not modify the edit list if any, you must modify this using gf_isom_set_edit. If both dur_num and dur_den are both zero, forces last sample duration to be the same as previous sample

Parameters

isom_file	the target ISO file
trackNumber	the target track
dur_num	duration num value
dur_den	duration num value

Returns: error if any

◆ gf_isom_patch_last_sample_duration()

GF_Err gf_isom_patch_last_sample_duration	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u64	next_dts
	)

patches last stts entry to make sure the cumulated duration equals the given next_dts value - this will overrite timing of all previous samples using an average dur

Parameters

isom_file	the target ISO file
trackNumber	the target track
next_dts	target decode time of next sample

Returns: error if any

◆ gf_isom_set_track_reference()

GF_Err gf_isom_set_track_reference	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	referenceType,
		GF_ISOTrackID	ReferencedTrackID
	)

adds a track reference to another track

Parameters

isom_file	the target ISO file
trackNumber	the target track
referenceType	the four character code of the reference
ReferencedTrackID	the ID of the track referred to

Returns: error if any

◆ gf_isom_remove_track_references()

GF_Err gf_isom_remove_track_references	(	GF_ISOFile *	isom_file,
		u32	trackNumber
	)

removes all track references

Parameters

isom_file	the target ISO file
trackNumber	the target track

Returns: error if any

◆ gf_isom_purge_track_reference()

GF_Err gf_isom_purge_track_reference	(	GF_ISOFile *	isom_file,
		u32	trackNumber
	)

removes any track reference poiting to a non-existing track

Parameters

isom_file	the target ISO file
trackNumber	the target track

Returns: error if any

◆ gf_isom_remove_track_reference()

GF_Err gf_isom_remove_track_reference	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	ref_type
	)

removes all track references of a given type

Parameters

isom_file	the target ISO file
trackNumber	the target track
ref_type	the reference type to remove

Returns: error if any

◆ gf_isom_set_handler_name()

GF_Err gf_isom_set_handler_name	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		const char *	nameUTF8
	)

sets track handler name.

Parameters

isom_file	the target ISO file
trackNumber	the target track
nameUTF8	the handler name; either NULL (reset), a UTF-8 formatted string or a UTF8 file resource in the form "file://path/to/file_utf8"

Returns: error if any

◆ gf_isom_refresh_size_info()

GF_Err gf_isom_refresh_size_info	(	GF_ISOFile *	isom_file,
		u32	trackNumber
	)

updates the sample size table - this is needed when using gf_isom_append_sample_data in case the resulting samples are of same sizes (typically in 3GP speech tracks)

Parameters

isom_file	the target ISO file
trackNumber	the target track

Returns: error if any

◆ gf_isom_update_duration()

GF_Err gf_isom_update_duration ( GF_ISOFile * isom_file )

updates the duration of the movie.This is done automatically when storing the file or editing timesales/edit list, but it is not done when adding samples.

Parameters

isom_file the target ISO file

Returns: error if any

◆ gf_isom_update_sample()

GF_Err gf_isom_update_sample	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleNumber,
		GF_ISOSample *	sample,
		Bool	data_only
	)

updates a given sample of the media. This function updates both media data of sample and sample properties (DTS, CTS, SAP type)

Parameters

isom_file	the target ISO file
trackNumber	the target track
sampleNumber	the number of the sample to update
sample	the new sample
data_only	if set to GF_TRUE, only the sample data is updated, not other info

Returns: error if any

◆ gf_isom_update_sample_reference()

GF_Err gf_isom_update_sample_reference	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleNumber,
		GF_ISOSample *	sample,
		u64	data_offset
	)

updates a sample reference in the media. Note that the sample MUST exists, and that sample->data MUST be NULL and sample->dataLength must be NON NULL.

Parameters

isom_file	the target ISO file
trackNumber	the target track
sampleNumber	the number of the sample to update
sample	the new sample
data_offset	new offset of sample in referenced file

Returns: error if any

◆ gf_isom_remove_sample()

GF_Err gf_isom_remove_sample	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleNumber
	)

removes a given sample

Parameters

isom_file	the target ISO file
trackNumber	the target track
sampleNumber	the number of the sample to update

Returns: error if any

◆ gf_isom_set_media_timescale()

GF_Err gf_isom_set_media_timescale	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	new_timescale,
		u32	new_tsinc,
		u32	force_rescale_type
	)

changes media time scale

Parameters

isom_file	the target ISO file
trackNumber	the target track
new_timescale	the new timescale to set
new_tsinc	if not 0, changes sample duration and composition offsets to new_tsinc/new_timescale. If non-constant sample dur is used, uses the samllest sample dur in the track. Otherwise, only changes the timescale
force_rescale_type	type fo rescaling, Ignored if new_tsinc is not 0: if set to 0, rescale timings. if set to 1, only the media timescale is changed but media times are not updated. if set to 2, media timescale is updated if new_timescale is set, and all sample durations are set to new_tsinc

Returns: GF_EOS if no action taken (same config), or error if any

◆ gf_isom_add_sample_aux_info()

GF_Err gf_isom_add_sample_aux_info	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleNumber,
		u32	aux_type,
		u32	aux_info,
		u8 *	data,
		u32	size
	)

adds sample auxiliary data

Parameters

isom_file	the target ISO file
trackNumber	the target track
sampleNumber	the sample number. Must be equal or larger to last auxiliary
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

◆ gf_isom_set_final_name()

GF_Err gf_isom_set_final_name	(	GF_ISOFile *	isom_file,
		char *	filename
	)

sets the save file name of the (edited) movie. If the movie is edited, the default fileName is the open name suffixed with an internally defined extension "%p_isotmp")"

Note: you cannot save an edited file under the same name (overwrite not allowed) If the movie is created (WRITE mode), the default filename is $OPEN_NAME

Parameters

isom_file	the target ISO file
filename	the new final filename

Returns: error if any

◆ gf_isom_set_storage_mode()

GF_Err gf_isom_set_storage_mode	(	GF_ISOFile *	isom_file,
		GF_ISOStorageMode	storage_mode
	)

sets the storage mode of a file (FLAT, STREAMABLE, INTERLEAVED)

Parameters

isom_file	the target ISO file
storage_mode	the target storage mode

Returns: error if any

◆ gf_isom_set_interleave_time()

GF_Err gf_isom_set_interleave_time	(	GF_ISOFile *	isom_file,
		u32	InterleaveTime
	)

sets the interleaving time of media data (INTERLEAVED mode only)

Parameters

isom_file	the target ISO file
InterleaveTime	the target interleaving time in movie timescale

Returns: error if any

◆ gf_isom_force_64bit_chunk_offset()

GF_Err gf_isom_force_64bit_chunk_offset	(	GF_ISOFile *	isom_file,
		Bool	set_on
	)

forces usage of 64 bit chunk offsets

Parameters

isom_file	the target ISO file
set_on	if GF_TRUE, 64 bit chunk offsets are always used; otherwise, they are used only for large files

Returns: error if any

◆ gf_isom_enable_compression()

GF_Err gf_isom_enable_compression	(	GF_ISOFile *	isom_file,
		GF_ISOCompressMode	compress_mode,
		u32	compress_flags
	)

sets compression mode of file

Parameters

isom_file	the target ISO file
compress_mode	the desired compress mode
compress_flags	compress mode flags

Returns: error if any

◆ gf_isom_set_copyright()

GF_Err gf_isom_set_copyright	(	GF_ISOFile *	isom_file,
		const char *	threeCharCode,
		char *	notice
	)

sets the copyright in one language

Parameters

isom_file	the target ISO file
threeCharCode	the ISO three character language code for copyright
notice	the copyright notice to add

Returns: error if any

◆ gf_isom_add_track_kind()

GF_Err gf_isom_add_track_kind	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		const char *	schemeURI,
		const char *	value
	)

adds a kind type to a track

Parameters

isom_file	the target ISO file
trackNumber	the target track
schemeURI	the scheme URI of the added kind
value	the value of the added kind

Returns: error if any

◆ gf_isom_remove_track_kind()

GF_Err gf_isom_remove_track_kind	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		const char *	schemeURI,
		const char *	value
	)

removes a kind type to the track, all if NULL params

Parameters

isom_file	the target ISO file
trackNumber	the target track
schemeURI	the scheme URI of the removed kind
value	the value of the removed kind

Returns: error if any

◆ gf_isom_set_media_type()

GF_Err gf_isom_set_media_type	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	new_type
	)

changes the handler type of the media

Warning: This may completely breaks the parsing of the media track

Parameters

isom_file	the target ISO file
trackNumber	the target track
new_type	the new handler four character type

Returns: error if any

◆ gf_isom_set_media_subtype()

GF_Err gf_isom_set_media_subtype	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		u32	new_type
	)

changes the type of the sampleDescriptionBox

Warning: This may completely breaks the parsing of the media track

Parameters

isom_file	the target ISO file
trackNumber	the target track
sampleDescriptionIndex	the target sample description index
new_type	the new four character code type of the smaple description

Returns: error if any

◆ gf_isom_set_alternate_group_id()

GF_Err gf_isom_set_alternate_group_id	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	groupId
	)

sets a track in an alternate group

Parameters

isom_file	the target ISO file
trackNumber	the target track
groupId	the alternate group ID

Returns: error if any

◆ gf_isom_add_chapter()

GF_Err gf_isom_add_chapter	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u64	timestamp,
		char *	name
	)

adds chapter info:

Parameters

isom_file	the target ISO file
trackNumber	the target track. If 0, the chapter info is added to the movie, otherwise to the track
timestamp	the chapter start time in milliseconds. Chapters are added in order to the file. If a chapter with same timestamp is found, its name is updated but no entry is created.
name	the chapter name. If NULL, defaults to 'Chapter N'

Returns: error if any

◆ gf_isom_remove_chapter()

GF_Err gf_isom_remove_chapter	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	index
	)

deletes copyright

Parameters

isom_file	the target ISO file
trackNumber	the target track
index	the 1-based index of the copyright notice to remove, or 0 to remove all chapters

Returns: error if any

◆ gf_isom_set_edit()

GF_Err gf_isom_set_edit	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u64	EditTime,
		u64	EditDuration,
		u64	MediaTime,
		GF_ISOEditType	EditMode
	)

updates or inserts a new edit in the track time line. Edits are used to modify the media normal timing. EditTime and EditDuration are expressed in movie timescale

Note: If a segment with EditTime already exists, it is erase; If there is a segment before this new one, its duration is adjust to match EditTime of the new segment

Warning: The first segment always have an EditTime of 0. You should insert an empty or dwelled segment first

Parameters

isom_file	the target ISO file
trackNumber	the target track
EditTime	the start of the edit in movie timescale
EditDuration	the duration of the edit in movie timecale
MediaTime	the corresponding media time of the start of the edit, in media timescale. -1 for empty edits
EditMode	the edit mode

Returns: error if any, GF_EOS if empty edit was inserted

◆ gf_isom_set_edit_with_rate()

GF_Err gf_isom_set_edit_with_rate	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u64	EditTime,
		u64	EditDuration,
		u64	MediaTime,
		u32	MediaRate
	)

updates or inserts a new edit in the track time line. Edits are used to modify the media normal timing. EditTime and EditDuration are expressed in movie timescale

Note: If a segment with EditTime already exists, it is erase; If there is a segment before this new one, its duration is adjust to match EditTime of the new segment

Warning: The first segment always have an EditTime of 0. You should insert an empty or dwelled segment first

Parameters

isom_file	the target ISO file
trackNumber	the target track
EditTime	the start of the edit in movie timescale
EditDuration	the duration of the edit in movie timecale
MediaTime	the corresponding media time of the start of the edit, in media timescale. -1 for empty edits
MediaRate	a 16.16 rate (0x10000 means normal playback)

Returns: error if any

◆ gf_isom_modify_edit()

GF_Err gf_isom_modify_edit	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	edit_index,
		u64	EditDuration,
		u64	MediaTime,
		GF_ISOEditType	EditMode
	)

same as gf_isom_set_edit except only modifies duration type and mediaType

Parameters

isom_file	the target ISO file
trackNumber	the target track
edit_index	the 1-based index of the edit to update
EditDuration	duration of the edit in movie timescale
MediaTime	the corresponding media time of the start of the edit, in media timescale. -1 for empty edits
EditMode	the edit mode

Returns: error if any

◆ gf_isom_append_edit()

GF_Err gf_isom_append_edit	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u64	EditDuration,
		u64	MediaTime,
		GF_ISOEditType	EditMode
	)

same as gf_isom_modify_edit except only appends new segment

Parameters

isom_file	the target ISO file
trackNumber	the target track
EditDuration	duration of the edit in movie timescale
MediaTime	the corresponding media time of the start of the edit, in media timescale. -1 for empty edits
EditMode	the edit mode

Returns: error if any

◆ gf_isom_remove_edits()

GF_Err gf_isom_remove_edits	(	GF_ISOFile *	isom_file,
		u32	trackNumber
	)

removes all edits in the track

Parameters

isom_file	the target ISO file
trackNumber	the target track

Returns: error if any

◆ gf_isom_remove_edit()

GF_Err gf_isom_remove_edit	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	edit_index
	)

removes the given edit. If this is not the last segment, the next segment duration is updated to maintain a continous timeline

Parameters

isom_file	the target ISO file
trackNumber	the target track
edit_index	the 1-based index of the edit to update

Returns: error if any

◆ gf_isom_update_edit_list_duration()

GF_Err gf_isom_update_edit_list_duration	(	GF_ISOFile *	isom_file,
		u32	trackNumber
	)

updates edit list after track edition. All edit entries with a duration or media starttime larger than the media duration are clamped to media duration

Parameters

isom_file	the target ISO file
trackNumber	the target track

Returns: error if any

◆ gf_isom_remove_uuid()

GF_Err gf_isom_remove_uuid	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		bin128	UUID
	)

remove track, moov or file-level UUID box of matching type

Parameters

isom_file	the target ISO file
trackNumber	the target track for the UUID box; if 0, removes from movie; if 0xFFFFFFFF, removes from file
UUID	the UUID of the box to remove

Returns: error if any

◆ gf_isom_add_uuid()

GF_Err gf_isom_add_uuid	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		bin128	UUID,
		const u8 *	data,
		u32	size
	)

adds track, moov or file-level UUID box

Parameters

isom_file	the target ISO file
trackNumber	the target track for the UUID box; if 0, removes from movie; if 0xFFFFFFFF, removes from file
UUID	the UUID of the box to remove
data	the data to add, may be NULL
size	the size of the data to add, shall be 0 when data is NULL

Returns: error if any

◆ gf_isom_use_compact_size()

GF_Err gf_isom_use_compact_size	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		Bool	CompactionOn
	)

uses a compact track version for sample size. This is not usually recommended except for speech codecs where the track has a lot of small samples compaction is done automatically while writing based on the track's sample sizes

Parameters

isom_file	the target ISO file
trackNumber	the target track for the udta box; if 0, add the udta to the movie;
CompactionOn	if set to GF_TRUE, compact size tables are used; otherwise regular size tables are used

Returns: error if any

◆ gf_isom_disable_brand_rewrite()

GF_Err gf_isom_disable_brand_rewrite	(	GF_ISOFile *	isom_file,
		Bool	do_disable
	)

disabled brand rewrite for file, usually done for temporary import in an existing file

Parameters

isom_file	the target ISO file
do_disable	if true, brand rewrite is disabled, otherwise enabled

Returns: error if any

◆ gf_isom_set_brand_info()

GF_Err gf_isom_set_brand_info	(	GF_ISOFile *	isom_file,
		u32	MajorBrand,
		u32	MinorVersion
	)

sets the brand of the movie

Note: this automatically adds the major brand to the set of alternate brands if not present

Parameters

isom_file	the target ISO file
MajorBrand	four character code of the major brand to set
MinorVersion	version of the brand

Returns: error if any

◆ gf_isom_modify_alternate_brand()

GF_Err gf_isom_modify_alternate_brand	(	GF_ISOFile *	isom_file,
		u32	Brand,
		Bool	AddIt
	)

adds or removes an alternate brand for the movie.

Note: When removing an alternate brand equal to the major brand, the major brand is updated with the first alternate brand remaining, or 'isom' otherwise

Parameters

isom_file	the target ISO file
Brand	four character code of the brand to add or remove
AddIt	if set to GF_TRUE, the brand is added, otherwise it is removed

Returns: error if any

◆ gf_isom_reset_alt_brands()

GF_Err gf_isom_reset_alt_brands ( GF_ISOFile * isom_file )

removes all alternate brands except major brand

Parameters

isom_file the target ISO file

Returns: error if any

◆ gf_isom_reset_alt_brands_ex()

GF_Err gf_isom_reset_alt_brands_ex	(	GF_ISOFile *	isom_file,
		Bool	leave_empty
	)

removes all alternate brands except major brand

Parameters

isom_file	the target ISO file
leave_empty	if GF_TRUE, does not create a default alternate brand matching the major brand

Returns: error if any

◆ gf_isom_set_sample_flags()

GF_Err gf_isom_set_sample_flags	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleNumber,
		u32	isLeading,
		u32	dependsOn,
		u32	dependedOn,
		u32	redundant
	)

set sample dependency flags - see ISO/IEC 14496-12 and gf_filter_pck_set_dependency_flags

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleNumber	the target sample number
isLeading	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

◆ gf_isom_set_visual_info()

GF_Err gf_isom_set_visual_info	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		u32	Width,
		u32	Height
	)

sets size information of a sample description of a visual track

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description index
Width	the width in pixels
Height	the height in pixels

Returns: error if any

◆ gf_isom_set_visual_bit_depth()

GF_Err gf_isom_set_visual_bit_depth	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		u16	bitDepth
	)

sets bit depth of a sample description of a visual track (for uncompressed media usually)

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description index
bitDepth	the bit depth of each pixel (eg 24 for RGB, 32 for RGBA)

Returns: error if any

◆ gf_isom_set_track_layout_info()

GF_Err gf_isom_set_track_layout_info	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	width,
		u32	height,
		s32	translation_x,
		s32	translation_y,
		s16	layer
	)

sets a visual track layout info

Parameters

isom_file	the target ISO file
trackNumber	the target track number
width	the track width in pixels
height	the track height in pixels
translation_x	the horizontal translation (from the left) of the track in the movie canvas, expressed as 16.16 fixed point float
translation_y	the vertical translation (from the top) of the track in the movie canvas, expressed as 16.16 fixed point float
layer	z order of the track on the canvas

Returns: error if any

◆ gf_isom_set_track_matrix()

GF_Err gf_isom_set_track_matrix	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		s32	matrix[9]
	)

sets track matrix

Parameters

isom_file	the target ISO file
trackNumber	the target track number
matrix	the transformation matrix of the track on the movie canvas; all coeficients are expressed as 16.16 floating points

Returns: error if any

◆ gf_isom_set_pixel_aspect_ratio()

GF_Err gf_isom_set_pixel_aspect_ratio	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		s32	hSpacing,
		s32	vSpacing,
		Bool	force_par
	)

sets the pixel aspect ratio for a sample description

Note: the aspect ratio is expressed as hSpacing divided by vSpacing; 2:1 means pixel is twice as wide as it is high

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description index
hSpacing	horizontal spacing of the aspect ratio; a value of 0 removes PAR; negative value means 1
vSpacing	vertical spacing of the aspect ratio; a value of 0 removes PAR; negative value means 1
force_par	if set, forces PAR to 1:1 when hSpacing=vSpacing; otherwise removes PAR when hSpacing=vSpacing

Returns: error if any

◆ gf_isom_set_clean_aperture()

GF_Err gf_isom_set_clean_aperture	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		u32	cleanApertureWidthN,
		u32	cleanApertureWidthD,
		u32	cleanApertureHeightN,
		u32	cleanApertureHeightD,
		s32	horizOffN,
		u32	horizOffD,
		s32	vertOffN,
		u32	vertOffD
	)

sets clean aperture (crop window, see ISO/IEC 14496-12) for a sample description

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description index
cleanApertureWidthN	nominator of clean aperture horizontal size
cleanApertureWidthD	denominator of clean aperture horizontal size
cleanApertureHeightN	nominator of clean aperture vertical size
cleanApertureHeightD	denominator of clean aperture vertical size
horizOffN	nominator of horizontal offset of clean aperture center minus (width-1)/2 (eg 0 sets center to center of video)
horizOffD	denominator of horizontal offset of clean aperture center minus (width-1)/2 (eg 0 sets center to center of video)
vertOffN	nominator of vertical offset of clean aperture center minus (height-1)/2 (eg 0 sets center to center of video)
vertOffD	denominator of vertical offset of clean aperture center minus (height-1)/2 (eg 0 sets center to center of video)

Returns: error if any

◆ gf_isom_update_aperture_info()

GF_Err gf_isom_update_aperture_info	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		Bool	remove
	)

updates track aperture information for QT/ProRes

Parameters

isom_file	the target ISO file
trackNumber	the target track number
remove	if GF_TRUE, remove track aperture information, otherwise updates it

Returns: error if any

◆ gf_isom_set_high_dynamic_range_info()

GF_Err gf_isom_set_high_dynamic_range_info	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		GF_MasteringDisplayColourVolumeInfo *	mdcv,
		GF_ContentLightLevelInfo *	clli
	)

sets high dynamic range information for a sample description

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description index
mdcv	the mastering display colour volume to set, if NULL removes the info
clli	the content light level to set, if NULL removes the info

Returns: error if any

◆ gf_isom_set_dolby_vision_profile()

GF_Err gf_isom_set_dolby_vision_profile	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		GF_DOVIDecoderConfigurationRecord *	dvcc
	)

force Dolby Vision profile: mainly used when the bitstream doesn't contain all the necessary information

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description index
dvcc	the Dolby Vision configuration

Returns: error if any

◆ gf_isom_set_image_sequence_coding_constraints()

GF_Err gf_isom_set_image_sequence_coding_constraints	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		Bool	remove,
		Bool	all_ref_pics_intra,
		Bool	intra_pred_used,
		u32	max_ref_per_pic
	)

sets image sequence coding constraints (mostly used for HEIF image files)

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description index
remove	if set to GF_TRUE, removes coding constraints
all_ref_pics_intra	indicates if all reference pictures are intra frames
intra_pred_used	indicates if intra prediction is used
max_ref_per_pic	indicates the max number of reference images per picture

Returns: error if any

◆ gf_isom_set_image_sequence_alpha()

GF_Err gf_isom_set_image_sequence_alpha	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		Bool	remove
	)

sets image sequence alpha flag (mostly used for HEIF image files). The alpha flag indicates the image sequence is an alpha plane or has an alpha channel

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description index
remove	if set to GF_TRUE, removes coding constraints

Returns: error if any

◆ gf_isom_set_visual_color_info()

GF_Err gf_isom_set_visual_color_info	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		u32	colour_type,
		u16	colour_primaries,
		u16	transfer_characteristics,
		u16	matrix_coefficients,
		Bool	full_range_flag,
		u8 *	icc_data,
		u32	icc_size
	)

sets colour information for a sample description

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description index
colour_type	the four character code of the colour type to set (nclc, nclx, prof, ricc); if 0, removes all color info
colour_primaries	the colour primaries for nclc/nclx as defined in ISO/IEC 23001-8
transfer_characteristics	the colour primaries for nclc/nclx as defined in ISO/IEC 23001-8
matrix_coefficients	the colour primaries for nclc/nclx as defined in ISO/IEC 23001-8
full_range_flag	the colour primaries for nclc as defined in ISO/IEC 23001-8
icc_data	the icc data pto set for prof and ricc types
icc_size	the size of the icc data

Returns: error if any

◆ gf_isom_set_audio_info()

GF_Err gf_isom_set_audio_info	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		u32	sampleRate,
		u32	nbChannels,
		u8	bitsPerSample,
		GF_AudioSampleEntryImportMode	asemode
	)

sets audio format information for a sample description

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description index
sampleRate	the audio sample rate
nbChannels	the number of audio channels
bitsPerSample	the number of bits per sample, mostly used for raw audio
asemode	type of audio entry signaling desired

Returns: error if any

◆ gf_isom_set_audio_layout()

GF_Err gf_isom_set_audio_layout	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		GF_AudioChannelLayout *	layout
	)

sets audio channel and object layout information for a sample description, ISOBMFF style

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description index
layout	the layout information

Returns: error if any

◆ gf_isom_set_cts_packing()

GF_Err gf_isom_set_cts_packing	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		Bool	unpack
	)

sets CTS unpack mode (used for B-frames & like): in unpack mode, each sample uses one entry in CTTS tables

Parameters

isom_file	the target ISO file
trackNumber	the target track number
unpack	if GF_TRUE, sets unpack on, creating a ctts table if none found; if GF_FALSE, sets unpack off and repacks all table info

Returns: error if any

◆ gf_isom_shift_cts_offset()

GF_Err gf_isom_shift_cts_offset	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		s32	offset_shift
	)

shifts all CTS with the given offset. This MUST be called in unpack mode only

Parameters

isom_file	the target ISO file
trackNumber	the target track number
offset_shift	CTS offset shift in media timescale

Returns: error if any

◆ gf_isom_set_composition_offset_mode()

GF_Err gf_isom_set_composition_offset_mode	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		Bool	use_negative_offsets
	)

enables negative composition offset in track

Note: this will compute the composition to decode time information

Parameters

isom_file	the target ISO file
trackNumber	the target track
use_negative_offsets	if GF_TRUE, negative offsets are used, otherwise they are disabled

Returns: error if any

◆ gf_isom_set_ctts_v1()

GF_Err gf_isom_set_ctts_v1	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	ctts_shift
	)

enables negative composition offset in track and shift offsets

Parameters

isom_file	the target ISO file
trackNumber	the target track
ctts_shift	shif CTS offsets by the given time in media timescale if positive offsets only are used

Returns: error if any

◆ gf_isom_set_media_language()

GF_Err gf_isom_set_media_language	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		char *	code
	)

sets language for a track

Parameters

isom_file	the target ISO file
trackNumber	the target track number
code	3-character code or BCP-47 code media language

Returns: error if any

◆ gf_isom_get_last_created_track_id()

GF_ISOTrackID gf_isom_get_last_created_track_id ( GF_ISOFile * isom_file )

gets the ID of the last created track

Parameters

isom_file the target ISO file

Returns: the last created track ID

◆ gf_isom_apply_box_patch()

GF_Err gf_isom_apply_box_patch	(	GF_ISOFile *	isom_file,
		GF_ISOTrackID	trackID,
		const char *	box_patch_filename,
		Bool	for_fragments
	)

applies a box patch to the file. See examples in gpac test suite, media/boxpatch/

Parameters

isom_file	the target ISO file
trackID	the ID of the track to patch, in case one of the box patch applies to a track
box_patch_filename	the name of the file containing the box patches
for_fragments	indicates if the patch targets movie fragments or regular moov

Returns: error if any

◆ gf_isom_set_track_magic()

GF_Err gf_isom_set_track_magic	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u64	magic
	)

sets track magic number

Parameters

isom_file	the target ISO file
trackNumber	the target track
magic	the magic number to set; magic number is not written to file

Returns: error if any

◆ gf_isom_set_track_index()

GF_Err gf_isom_set_track_index	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	index,
		void()(void udta, u32 old_track_num, u32 new_track_num)	track_num_changed,
		void *	udta
	)

sets track index in moov

Parameters

isom_file	the target ISO file
trackNumber	the target track
index	the 1-based index to set. Tracks will be reordered after this!
track_num_changed	callback function used to notify track changes during the call to this function
udta	opaque user data for the callback function

Returns: error if any

◆ gf_isom_remove_stream_description()

GF_Err gf_isom_remove_stream_description	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex
	)

removes a sample description with the given index

Warning: This does not remove any added samples for that stream description, nor rewrite the sample to chunk and other boxes referencing the sample description index !

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description to remove

Returns: error if any

◆ gf_isom_update_bitrate()

GF_Err gf_isom_update_bitrate	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	sampleDescriptionIndex,
		u32	average_bitrate,
		u32	max_bitrate,
		u32	decode_buffer_size
	)

updates average and max bitrate of a sample description if both average_bitrate and max_bitrate are 0, this removes any bitrate information

Parameters

isom_file	the target ISO file
trackNumber	the target track number
sampleDescriptionIndex	the target sample description
average_bitrate	the average bitrate of the media for that sample description
max_bitrate	the maximum bitrate of the media for that sample description
decode_buffer_size	the decoder buffer size in bytes for that sample description

Returns: error if any

◆ gf_isom_clone_track()

GF_Err gf_isom_clone_track	(	GF_ISOFile *	orig_file,
		u32	orig_track,
		GF_ISOFile *	dest_file,
		GF_ISOTrackCloneFlags	flags,
		u32 *	dest_track
	)

clones a track. This clones everything except media data and sample info (DTS, CTS, RAPs, etc...), and also clones sample descriptions

Parameters

orig_file	the source ISO file
orig_track	the source track
dest_file	the destination ISO file
flags	flags to use during clone
dest_track	set to the track number of cloned track

Returns: error if any

◆ gf_isom_set_track_interleaving_group()

GF_Err gf_isom_set_track_interleaving_group	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	GroupID
	)

sets the GroupID of a track (only used for optimized interleaving). By setting GroupIDs you can specify the storage order for media data of a group of streams. This is useful for BIFS presentation so that static resources of the scene can be downloaded before BIFS

Parameters

isom_file	the target ISO file
trackNumber	the target track
GroupID	the desired group ID

Returns: error if any

◆ gf_isom_set_track_priority_in_group()

GF_Err gf_isom_set_track_priority_in_group	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	InversePriority
	)

sets the priority of a track within a Group (used for optimized interleaving and hinting). This allows tracks to be stored before other within a same group, for instance the hint track data can be stored just before the media data, reducing disk seeking

Parameters

isom_file	the target ISO file
trackNumber	the target track
InversePriority	the desired priority. For a same time, within a group of tracks, the track with the lowest InversePriority will be written first

Returns: error if any

◆ gf_isom_hint_max_chunk_size()

GF_Err gf_isom_hint_max_chunk_size	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	maxChunkSize
	)

sets the maximum chunk size for a track

Parameters

isom_file	the target ISO file
trackNumber	the target track
maxChunkSize	the maximum chunk size in bytes

Returns: error if any

◆ gf_isom_hint_max_chunk_duration()

GF_Err gf_isom_hint_max_chunk_duration	(	GF_ISOFile *	isom_file,
		u32	trackNumber,
		u32	maxChunkDur
	)

sets the maximum chunk duration for a track

Parameters

isom_file	the target ISO file
trackNumber	the target track
maxChunkDur	the maximum chunk duration in media timescale

Returns: error if any

◆ gf_isom_make_interleave()

GF_Err gf_isom_make_interleave	(	GF_ISOFile *	isom_file,
		Double	TimeInSec
	)

sets up interleaving for storage (shortcut for storeage mode + interleave_time)

Parameters

isom_file	the target ISO file
TimeInSec	the desired interleaving time in seconds

Returns: error if any

◆ gf_isom_make_interleave_ex()

GF_Err gf_isom_make_interleave_ex	(	GF_ISOFile *	isom_file,
		GF_Fraction *	fTimeInSec
	)

sets up interleaving for storage (shortcut for storeage mode + interleave_time)

Parameters

isom_file	the target ISO file
fTimeInSec	the desired interleaving time in seconds, as a fraction

Returns: error if any

◆ gf_isom_set_progress_callback()

void gf_isom_set_progress_callback	(	GF_ISOFile *	isom_file,
		void()(void udta, u64 nb_done, u64 nb_total)	progress_cbk,
		void *	progress_cbk_udta
	)

sets progress callback when writing a file

Parameters

isom_file	the target ISO file
progress_cbk	the progress callback function
progress_cbk_udta	opaque data passed to the progress callback function

◆ gf_isom_set_write_callback()

GF_Err gf_isom_set_write_callback	(	GF_ISOFile *	isom_file,
		gf_isom_on_block_out	on_block_out,
		gf_isom_on_block_patch	on_block_patch,
		gf_isom_on_last_block_start	on_last_block_start,
		void *	usr_data,
		u32	block_size
	)

sets write callback functions for in-memory file writing

Parameters

isom_file	the target ISO file
on_block_out	the block write callback function, mandatory
on_block_patch	the block patch callback function, may be NULL if only fragmented files or very small files are being produced
on_last_block_start	called before writing the last block of a sequence of movie fragments
usr_data	opaque user data passed to callback functions
block_size	desired block size in bytes

Returns: error if any

◆ gf_isom_is_inplace_rewrite()

Bool gf_isom_is_inplace_rewrite ( GF_ISOFile * isom_file )

checks if file will use in-place rewriting or not

Parameters

isom_file the target ISO file

Returns: GF_TRUE if in-place rewrite is used, GF_FALSE otherwise

◆ gf_isom_disable_inplace_rewrite()

void gf_isom_disable_inplace_rewrite ( GF_ISOFile * isom_file )

Disables inplace rewrite. Once in-place rewrite is disabled, the file can no longer be rewrittten in place.

In-place rewriting allows editing the file structure (ftyp, moov and meta boxes) without modifying the media data size.

In-place rewriting is disabled for any of the following:

specifying a storage mode using gf_isom_set_storage_mode
removing or adding tracks or items
removing, adding or updating samples
using stdout, redirect file "_gpac_isobmff_redirect", memory file " gmem://"

In-place rewriting is enabled by default on files open in edit mode.

Parameters

isom_file the target ISO file

◆ gf_isom_set_inplace_padding()

GF_Err gf_isom_set_inplace_padding	(	GF_ISOFile *	isom_file,
		u32	padding
	)

sets amount of bytes to reserve after moov for future in-place editing. This may be ignored depending on the final write mode

Parameters

isom_file	the target ISO file
padding	amount of bytes to reserve

Returns: error if any

Typedefs

Enumerations

Functions

Detailed Description

Typedef Documentation

◆ gf_isom_on_block_out

◆ gf_isom_on_block_patch

◆ gf_isom_on_last_block_start

Enumeration Type Documentation

◆ GF_ISOStorageMode

◆ GF_ISOMTrackFlagOp

◆ anonymous enum

◆ GF_ISOCompressMode

◆ anonymous enum

◆ GF_AudioSampleEntryImportMode

◆ GF_ISOTrackCloneFlags

Function Documentation

◆ gf_isom_freeze_order()

◆ gf_isom_keep_utc_times()

◆ gf_isom_has_keep_utc_times()

◆ gf_isom_set_timescale()

◆ gf_isom_load_extra_boxes()

◆ gf_isom_new_track()

◆ gf_isom_new_track_from_template()

◆ gf_isom_remove_track()

◆ gf_isom_set_track_enabled()

◆ gf_isom_set_track_flags()

◆ gf_isom_set_creation_time()

◆ gf_isom_set_track_creation_time()

◆ gf_isom_set_media_creation_time()

◆ gf_isom_set_track_id()

◆ gf_isom_rewrite_track_dependencies()

◆ gf_isom_add_sample()

◆ gf_isom_copy_sample_info()

◆ gf_isom_add_sample_shadow()

◆ gf_isom_append_sample_data()

◆ gf_isom_add_sample_reference()

◆ gf_isom_set_last_sample_duration()

◆ gf_isom_set_last_sample_duration_ex()

◆ gf_isom_patch_last_sample_duration()

◆ gf_isom_set_track_reference()

◆ gf_isom_remove_track_references()

◆ gf_isom_purge_track_reference()

◆ gf_isom_remove_track_reference()

◆ gf_isom_set_handler_name()

◆ gf_isom_refresh_size_info()

◆ gf_isom_update_duration()

◆ gf_isom_update_sample()

◆ gf_isom_update_sample_reference()

◆ gf_isom_remove_sample()

◆ gf_isom_set_media_timescale()

◆ gf_isom_add_sample_aux_info()

◆ gf_isom_set_final_name()

◆ gf_isom_set_storage_mode()

◆ gf_isom_set_interleave_time()

◆ gf_isom_force_64bit_chunk_offset()

◆ gf_isom_enable_compression()

◆ gf_isom_set_copyright()

◆ gf_isom_add_track_kind()

◆ gf_isom_remove_track_kind()

◆ gf_isom_set_media_type()

◆ gf_isom_set_media_subtype()

◆ gf_isom_set_alternate_group_id()

◆ gf_isom_add_chapter()

◆ gf_isom_remove_chapter()

◆ gf_isom_set_edit()

◆ gf_isom_set_edit_with_rate()

◆ gf_isom_modify_edit()

◆ gf_isom_append_edit()

◆ gf_isom_remove_edits()

◆ gf_isom_remove_edit()

◆ gf_isom_update_edit_list_duration()

◆ gf_isom_remove_uuid()

◆ gf_isom_add_uuid()

◆ gf_isom_use_compact_size()

◆ gf_isom_disable_brand_rewrite()

◆ gf_isom_set_brand_info()

◆ gf_isom_modify_alternate_brand()

◆ gf_isom_reset_alt_brands()

◆ gf_isom_reset_alt_brands_ex()