Why Go
- Case Studies
  
  Common problems companies solve with Go
- Use Cases
  
  Stories about how and why companies use Go
- Security Policy
  
  How Go can help keep you secure by default
Learn
Docs
- Effective Go
  
  Tips for writing clear, performant, and idiomatic Go code
- Go User Manual
  
  A complete introduction to building software with Go
- Standard library
  
  Reference documentation for Go's standard library
- Release Notes
  
  Learn what's new in each Go release
Packages
Community
- Recorded Talks
  
  Videos from prior events
- Meetups
  
  Meet other local Go developers
- Conferences
  
  Learn and network with Go developers from around the world
- Go blog
  
  The Go project's official blog.
- Go project
  
  Get help and stay informed from Go
- Get connected

fmp4io

package

Go to main page

Versions in this module

v1

v1.6.0

Dec 10, 2023

v1.5.0

Dec 2, 2023

v1.4.0

Jul 1, 2023

v1.3.1

May 9, 2021

v1.3.0

Dec 20, 2020

v1.2.0

Nov 22, 2020

Changes in this version

+ const AVC1

+ const AVCC

+ const CTTS

+ const DINF

+ const DOPS

+ const DREF

+ const ESDS

+ const FTYP

+ const HDLR

+ const MDAT

+ const MDHD

+ const MDIA

+ const MFHD

+ const MINF

+ const MOOF

+ const MOOV

+ const MP4A

+ const MVEX

+ const MVHD

+ const OPUS

+ const PASP

+ const SIDX

+ const SMHD

+ const STBL

+ const STCO

+ const STSC

+ const STSD

+ const STSS

+ const STSZ

+ const STTS

+ const STYP

+ const SoundHandler

+ const TFDT

+ const TFHD

+ const TKHD

+ const TRAF

+ const TRAK

+ const TREX

+ const TRUN

+ const URL

+ const VMHD

+ const VideoHandler

+ func FprintAtom(out io.Writer, root Atom)

+ func GetFixed16(b []byte) float64

+ func GetFixed32(b []byte) float64

+ func GetTime32(b []byte) (t time.Time)

+ func GetTime64(b []byte) (t time.Time)

+ func PrintAtom(root Atom)

+ func PutFixed16(b []byte, f float64)

+ func PutFixed32(b []byte, f float64)

+ func PutTime32(b []byte, t time.Time)

+ func PutTime64(b []byte, t time.Time)

+ type AVC1Conf struct

+ Data []byte

+ func (a *AVC1Conf) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a AVC1Conf) Children() (r []Atom)

+ func (a AVC1Conf) Len() (n int)

+ func (a AVC1Conf) Marshal(b []byte) (n int)

+ func (a AVC1Conf) Tag() Tag

+ type AVC1Desc struct

+ ColorTableId int16

+ CompressorName [32]byte

+ Conf *AVC1Conf

+ DataRefIdx int16

+ Depth int16

+ FrameCount int16

+ Height int16

+ HorizontalResolution float64

+ PixelAspect *PixelAspect

+ Revision int16

+ SpatialQuality int32

+ TemporalQuality int32

+ Unknowns []Atom

+ Vendor int32

+ Version int16

+ VorizontalResolution float64

+ Width int16

+ func (a *AVC1Desc) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a AVC1Desc) Children() (r []Atom)

+ func (a AVC1Desc) Len() (n int)

+ func (a AVC1Desc) Marshal(b []byte) (n int)

+ func (a AVC1Desc) Tag() Tag

+ type Atom interface

+ Children func() []Atom

+ Len func() int

+ Marshal func([]byte) int

+ Pos func() (int, int)

+ Tag func() Tag

+ Unmarshal func([]byte, int) (int, error)

+ func FindChildren(root Atom, tag Tag) Atom

+ func FindChildrenByName(root Atom, tag string) Atom

+ func ReadFileAtoms(r io.ReadSeeker) (atoms []Atom, err error)

+ type AtomPos struct

+ Offset int

+ Size int

+ func (a AtomPos) Pos() (int, int)

+ type ChunkOffset struct

+ Entries []uint32

+ Flags uint32

+ Version uint8

+ func (a *ChunkOffset) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a ChunkOffset) Children() (r []Atom)

+ func (a ChunkOffset) Len() (n int)

+ func (a ChunkOffset) Marshal(b []byte) (n int)

+ func (a ChunkOffset) String() string

+ func (a ChunkOffset) Tag() Tag

+ type CompositionOffset struct

+ Entries []CompositionOffsetEntry

+ Flags uint32

+ Version uint8

+ func (a *CompositionOffset) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a CompositionOffset) Children() (r []Atom)

+ func (a CompositionOffset) Len() (n int)

+ func (a CompositionOffset) Marshal(b []byte) (n int)

+ func (a CompositionOffset) String() string

+ func (a CompositionOffset) Tag() Tag

+ type CompositionOffsetEntry struct

+ Count uint32

+ Offset uint32

+ type DataInfo struct

+ Refer *DataRefer

+ Unknowns []Atom

+ func (a *DataInfo) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a DataInfo) Children() (r []Atom)

+ func (a DataInfo) Len() (n int)

+ func (a DataInfo) Marshal(b []byte) (n int)

+ func (a DataInfo) Tag() Tag

+ type DataRefer struct

+ Flags uint32

+ Url *DataReferUrl

+ Version uint8

+ func (a *DataRefer) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a DataRefer) Children() (r []Atom)

+ func (a DataRefer) Len() (n int)

+ func (a DataRefer) Marshal(b []byte) (n int)

+ func (a DataRefer) Tag() Tag

+ type DataReferUrl struct

+ Flags uint32

+ Version uint8

+ func (a *DataReferUrl) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a DataReferUrl) Children() (r []Atom)

+ func (a DataReferUrl) Len() (n int)

+ func (a DataReferUrl) Marshal(b []byte) (n int)

+ func (a DataReferUrl) Tag() Tag

+ type Dummy struct

+ Data []byte

+ Tag_ Tag

+ func (a *Dummy) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a Dummy) Children() []Atom

+ func (a Dummy) Len() int

+ func (a Dummy) Marshal(b []byte) int

+ func (a Dummy) Tag() Tag

+ type ElemStreamDesc struct

+ StreamDescriptor *esio.StreamDescriptor

+ func (a *ElemStreamDesc) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a ElemStreamDesc) Children() []Atom

+ func (a ElemStreamDesc) Len() (n int)

+ func (a ElemStreamDesc) Marshal(b []byte) (n int)

+ func (a ElemStreamDesc) Tag() Tag

+ type FileType struct

+ CompatibleBrands []uint32

+ MajorBrand uint32

+ MinorVersion uint32

+ func (f *FileType) Unmarshal(b []byte, offset int) (n int, err error)

+ func (f FileType) Children() []Atom

+ func (f FileType) Len() int

+ func (f FileType) Marshal(b []byte) (n int)

+ func (t FileType) Tag() Tag

+ type FullAtom struct

+ Flags uint32

+ Version uint8

+ type HandlerRefer struct

+ Flags uint32

+ Name string

+ Predefined uint32

+ Reserved [3]uint32

+ Type uint32

+ Version uint8

+ func (a *HandlerRefer) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a HandlerRefer) Children() (r []Atom)

+ func (a HandlerRefer) Len() (n int)

+ func (a HandlerRefer) Marshal(b []byte) (n int)

+ func (a HandlerRefer) Tag() Tag

+ type MP4ADesc struct

+ CompressionId int16

+ Conf *ElemStreamDesc

+ DataRefIdx int16

+ NumberOfChannels int16

+ RevisionLevel int16

+ SampleRate float64

+ SampleSize int16

+ Unknowns []Atom

+ Vendor int32

+ Version int16

+ func (a *MP4ADesc) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a MP4ADesc) Children() (r []Atom)

+ func (a MP4ADesc) Len() (n int)

+ func (a MP4ADesc) Marshal(b []byte) (n int)

+ func (a MP4ADesc) Tag() Tag

+ type Media struct

+ Handler *HandlerRefer

+ Header *MediaHeader

+ Info *MediaInfo

+ Unknowns []Atom

+ func (a *Media) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a Media) Children() (r []Atom)

+ func (a Media) Len() (n int)

+ func (a Media) Marshal(b []byte) (n int)

+ func (a Media) Tag() Tag

+ type MediaHeader struct

+ CreateTime time.Time

+ Duration uint32

+ Flags uint32

+ Language int16

+ ModifyTime time.Time

+ Quality int16

+ TimeScale uint32

+ Version uint8

+ func (a *MediaHeader) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a MediaHeader) Children() (r []Atom)

+ func (a MediaHeader) Len() (n int)

+ func (a MediaHeader) Marshal(b []byte) (n int)

+ func (a MediaHeader) Tag() Tag

+ type MediaInfo struct

+ Data *DataInfo

+ Sample *SampleTable

+ Sound *SoundMediaInfo

+ Unknowns []Atom

+ Video *VideoMediaInfo

+ func (a *MediaInfo) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a MediaInfo) Children() (r []Atom)

+ func (a MediaInfo) Len() (n int)

+ func (a MediaInfo) Marshal(b []byte) (n int)

+ func (a MediaInfo) Tag() Tag

+ type Movie struct

+ Header *MovieHeader

+ MovieExtend *MovieExtend

+ Tracks []*Track

+ Unknowns []Atom

+ func (a *Movie) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a Movie) Children() (r []Atom)

+ func (a Movie) Len() (n int)

+ func (a Movie) Marshal(b []byte) (n int)

+ func (a Movie) Tag() Tag

+ type MovieExtend struct

+ Tracks []*TrackExtend

+ Unknowns []Atom

+ func (a *MovieExtend) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a MovieExtend) Children() (r []Atom)

+ func (a MovieExtend) Len() (n int)

+ func (a MovieExtend) Marshal(b []byte) (n int)

+ func (a MovieExtend) Tag() Tag

+ type MovieFrag struct

+ Header *MovieFragHeader

+ Tracks []*TrackFrag

+ Unknowns []Atom

+ func (a *MovieFrag) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a MovieFrag) Children() (r []Atom)

+ func (a MovieFrag) Len() (n int)

+ func (a MovieFrag) Marshal(b []byte) (n int)

+ func (a MovieFrag) Tag() Tag

+ type MovieFragHeader struct

+ Flags uint32

+ Seqnum uint32

+ Version uint8

+ func (a *MovieFragHeader) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a MovieFragHeader) Children() (r []Atom)

+ func (a MovieFragHeader) Len() (n int)

+ func (a MovieFragHeader) Marshal(b []byte) (n int)

+ func (a MovieFragHeader) Tag() Tag

+ type MovieHeader struct

+ CreateTime time.Time

+ Duration uint32

+ Flags uint32

+ Matrix [9]int32

+ ModifyTime time.Time

+ NextTrackID uint32

+ PreferredRate float64

+ PreferredVolume float64

+ TimeScale uint32

+ Version uint8

+ func (a *MovieHeader) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a MovieHeader) Children() (r []Atom)

+ func (a MovieHeader) Len() (n int)

+ func (a MovieHeader) Marshal(b []byte) (n int)

+ func (a MovieHeader) String() string

+ func (a MovieHeader) Tag() Tag

+ type OpusSampleEntry struct

+ CompressionID uint16

+ Conf *OpusSpecificConfiguration

+ DataRefIdx uint16

+ NumberOfChannels uint16

+ SampleRate float64

+ SampleSize uint16

+ func (a *OpusSampleEntry) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a OpusSampleEntry) Children() (r []Atom)

+ func (a OpusSampleEntry) Len() (n int)

+ func (a OpusSampleEntry) Marshal(b []byte) (n int)

+ func (a OpusSampleEntry) Tag() Tag

+ type OpusSpecificConfiguration struct

+ ChannelMappingFamily uint8

+ InputSampleRate uint32

+ OutputChannelCount uint8

+ OutputGain int16

+ PreSkip uint16

+ Version uint8

+ func (a *OpusSpecificConfiguration) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a OpusSpecificConfiguration) Children() []Atom

+ func (a OpusSpecificConfiguration) Len() (n int)

+ func (a OpusSpecificConfiguration) Marshal(b []byte) (n int)

+ func (a OpusSpecificConfiguration) Tag() Tag

+ type ParseError struct

+ Debug string

+ Offset int

+ func (a *ParseError) Error() string

+ type PixelAspect struct

+ HorizontalSpacing uint32

+ VerticalSpacing uint32

+ func (a *PixelAspect) Children() (r []Atom)

+ func (a *PixelAspect) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a PixelAspect) Len() (n int)

+ func (a PixelAspect) Marshal(b []byte) (n int)

+ func (a PixelAspect) Tag() Tag

+ type SampleDesc struct

+ AVC1Desc *AVC1Desc

+ MP4ADesc *MP4ADesc

+ OpusDesc *OpusSampleEntry

+ Unknowns []Atom

+ Version uint8

+ func (a *SampleDesc) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a SampleDesc) Children() (r []Atom)

+ func (a SampleDesc) Len() (n int)

+ func (a SampleDesc) Marshal(b []byte) (n int)

+ func (a SampleDesc) Tag() Tag

+ type SampleFlags uint32

+ const SampleHasDependencies

+ const SampleIsNonSync

+ const SampleNoDependencies

+ const SampleNonKeyframe

+ type SampleSize struct

+ Entries []uint32

+ Flags uint32

+ SampleSize uint32

+ Version uint8

+ func (a *SampleSize) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a SampleSize) Children() (r []Atom)

+ func (a SampleSize) Len() (n int)

+ func (a SampleSize) Marshal(b []byte) (n int)

+ func (a SampleSize) String() string

+ func (a SampleSize) Tag() Tag

+ type SampleTable struct

+ ChunkOffset *ChunkOffset

+ CompositionOffset *CompositionOffset

+ SampleDesc *SampleDesc

+ SampleSize *SampleSize

+ SampleToChunk *SampleToChunk

+ SyncSample *SyncSample

+ TimeToSample *TimeToSample

+ func (a *SampleTable) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a SampleTable) Children() (r []Atom)

+ func (a SampleTable) Len() (n int)

+ func (a SampleTable) Marshal(b []byte) (n int)

+ func (a SampleTable) Tag() Tag

+ type SampleToChunk struct

+ Entries []SampleToChunkEntry

+ Flags uint32

+ Version uint8

+ func (a *SampleToChunk) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a SampleToChunk) Children() (r []Atom)

+ func (a SampleToChunk) Len() (n int)

+ func (a SampleToChunk) Marshal(b []byte) (n int)

+ func (a SampleToChunk) String() string

+ func (a SampleToChunk) Tag() Tag

+ type SampleToChunkEntry struct

+ FirstChunk uint32

+ SampleDescId uint32

+ SamplesPerChunk uint32

+ type SegmentIndex struct

+ EarliestPTS uint64

+ FirstOffset uint64

+ ReferenceID uint32

+ References []SegmentReference

+ TimeScale uint32

+ func (s *SegmentIndex) Unmarshal(b []byte, offset int) (n int, err error)

+ func (s SegmentIndex) Children() []Atom

+ func (s SegmentIndex) Len() (n int)

+ func (s SegmentIndex) Marshal(b []byte) (n int)

+ func (s SegmentIndex) Tag() Tag

+ type SegmentReference struct

+ ReferencedSize uint32

+ ReferencesBox bool

+ SAPDeltaTime uint32

+ SAPType uint8

+ StartsWithSAP bool

+ SubsegmentDuration uint32

+ type SegmentType struct

+ CompatibleBrands []uint32

+ MajorBrand uint32

+ MinorVersion uint32

+ func (f *SegmentType) Unmarshal(b []byte, offset int) (n int, err error)

+ func (f SegmentType) Children() []Atom

+ func (f SegmentType) Len() int

+ func (f SegmentType) Marshal(b []byte) (n int)

+ func (t SegmentType) Tag() Tag

+ type SoundMediaInfo struct

+ Balance int16

+ Flags uint32

+ Version uint8

+ func (a *SoundMediaInfo) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a SoundMediaInfo) Children() (r []Atom)

+ func (a SoundMediaInfo) Len() (n int)

+ func (a SoundMediaInfo) Marshal(b []byte) (n int)

+ func (a SoundMediaInfo) Tag() Tag

+ type SyncSample struct

+ Entries []uint32

+ Flags uint32

+ Version uint8

+ func (a *SyncSample) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a SyncSample) Children() (r []Atom)

+ func (a SyncSample) Len() (n int)

+ func (a SyncSample) Marshal(b []byte) (n int)

+ func (a SyncSample) String() string

+ func (a SyncSample) Tag() Tag

+ type Tag uint32

+ func StringToTag(tag string) Tag

+ func (a Tag) String() string

+ type TimeToSample struct

+ Entries []TimeToSampleEntry

+ Flags uint32

+ Version uint8

+ func (a *TimeToSample) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a TimeToSample) Children() (r []Atom)

+ func (a TimeToSample) Len() (n int)

+ func (a TimeToSample) Marshal(b []byte) (n int)

+ func (a TimeToSample) String() string

+ func (a TimeToSample) Tag() Tag

+ type TimeToSampleEntry struct

+ Count uint32

+ Duration uint32

+ type Track struct

+ Header *TrackHeader

+ Media *Media

+ Unknowns []Atom

+ func (a *Track) GetAVC1Conf() (conf *AVC1Conf)

+ func (a *Track) GetElemStreamDesc() (esds *ElemStreamDesc)

+ func (a *Track) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a Track) Children() (r []Atom)

+ func (a Track) Len() (n int)

+ func (a Track) Marshal(b []byte) (n int)

+ func (a Track) Tag() Tag

+ type TrackExtend struct

+ DefaultSampleDescIdx uint32

+ DefaultSampleDuration uint32

+ DefaultSampleFlags uint32

+ DefaultSampleSize uint32

+ Flags uint32

+ TrackID uint32

+ Version uint8

+ func (a *TrackExtend) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a TrackExtend) Children() (r []Atom)

+ func (a TrackExtend) Len() (n int)

+ func (a TrackExtend) Marshal(b []byte) (n int)

+ func (a TrackExtend) Tag() Tag

+ type TrackFrag struct

+ DecodeTime *TrackFragDecodeTime

+ Header *TrackFragHeader

+ Run *TrackFragRun

+ Unknowns []Atom

+ func (a *TrackFrag) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a TrackFrag) Children() (r []Atom)

+ func (a TrackFrag) Len() (n int)

+ func (a TrackFrag) Marshal(b []byte) (n int)

+ func (a TrackFrag) Tag() Tag

+ type TrackFragDecodeTime struct

+ Flags uint32

+ Time uint64

+ Version uint8

+ func (a *TrackFragDecodeTime) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a TrackFragDecodeTime) Children() (r []Atom)

+ func (a TrackFragDecodeTime) Len() (n int)

+ func (a TrackFragDecodeTime) Marshal(b []byte) (n int)

+ func (a TrackFragDecodeTime) Tag() Tag

+ type TrackFragFlags uint32

+ const TrackFragBaseDataOffset

+ const TrackFragDefaultBaseIsMOOF

+ const TrackFragDefaultDuration

+ const TrackFragDefaultFlags

+ const TrackFragDefaultSize

+ const TrackFragDurationIsEmpty

+ const TrackFragStsdID

+ type TrackFragHeader struct

+ BaseDataOffset uint64

+ DefaultDuration uint32

+ DefaultFlags SampleFlags

+ DefaultSize uint32

+ Flags TrackFragFlags

+ StsdID uint32

+ TrackID uint32

+ Version uint8

+ func (a *TrackFragHeader) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a TrackFragHeader) Children() (r []Atom)

+ func (a TrackFragHeader) Len() (n int)

+ func (a TrackFragHeader) Marshal(b []byte) (n int)

+ func (a TrackFragHeader) String() string

+ func (a TrackFragHeader) Tag() Tag

+ type TrackFragRun struct

+ DataOffset uint32

+ Entries []TrackFragRunEntry

+ FirstSampleFlags SampleFlags

+ Flags TrackRunFlags

+ Version uint8

+ func (a *TrackFragRun) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a TrackFragRun) Children() (r []Atom)

+ func (a TrackFragRun) Len() (n int)

+ func (a TrackFragRun) Marshal(b []byte) (n int)

+ func (a TrackFragRun) String() string

+ func (a TrackFragRun) Tag() Tag

+ type TrackFragRunEntry struct

+ CTS int32

+ Duration uint32

+ Flags SampleFlags

+ Size uint32

+ type TrackHeader struct

+ AlternateGroup int16

+ CreateTime time.Time

+ Duration uint32

+ Flags uint32

+ Layer int16

+ Matrix [9]int32

+ ModifyTime time.Time

+ TrackHeight float64

+ TrackID uint32

+ TrackWidth float64

+ Version uint8

+ Volume float64

+ func (a *TrackHeader) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a TrackHeader) Children() (r []Atom)

+ func (a TrackHeader) Len() (n int)

+ func (a TrackHeader) Marshal(b []byte) (n int)

+ func (a TrackHeader) Tag() Tag

+ type TrackRunFlags uint32

+ const TrackRunDataOffset

+ const TrackRunFirstSampleFlags

+ const TrackRunSampleCTS

+ const TrackRunSampleDuration

+ const TrackRunSampleFlags

+ const TrackRunSampleSize

+ type VideoMediaInfo struct

+ Flags uint32

+ GraphicsMode int16

+ Opcolor [3]int16

+ Version uint8

+ func (a *VideoMediaInfo) Unmarshal(b []byte, offset int) (n int, err error)

+ func (a VideoMediaInfo) Children() (r []Atom)

+ func (a VideoMediaInfo) Len() (n int)

+ func (a VideoMediaInfo) Marshal(b []byte) (n int)

+ func (a VideoMediaInfo) Tag() Tag