ffmpeg

Jan 7, 2026

Changes in this version

+ var ErrCodecNotFound = errors.New("codec decoder not found")

type Opt

+ func WithInputFormat(iformat *ffmpeg.AVInputFormat, options ...string) Opt

Jan 6, 2026

Changes in this version

+ type DecoderPacketFn func(int, *Packet) error

+ type DecoderSubtitleFn func(int, *ff.AVSubtitle) error

+ type Filter struct

+ func NewFilter(filterSpec string, srcPar, destPar *Par) (*Filter, error)

+ func (f *Filter) Close() error

+ func (f *Filter) Process(src *Frame, fn func(*Frame) error) error

type Frame

+ func (frame *Frame) MatchesFormat(other *Frame) bool

type Metadata

+ func (m *Metadata) MarshalJSON() ([]byte, error)

type Opt

+ func OptCopy() Opt

+ func WithInput(format string, options ...string) Opt

type Packet

+ func (packet *Packet) Bytes() []byte

+ func (packet *Packet) Dts() int64

+ func (packet *Packet) Duration() int64

+ func (packet *Packet) Pts() int64

+ func (packet *Packet) Size() int

+ func (packet *Packet) Stream() int

type Reader

+ func (r *Reader) AVStreams() []*ff.AVStream

+ func (r *Reader) Demux(ctx context.Context, mapfn DecoderMapFunc, framefn DecoderFrameFn, ...) error

+ func (r *Reader) InputFormat() *ff.AVInputFormat

+ type Resampler struct

+ func (r *Resampler) Close() error

+ func (r *Resampler) Resample(src *Frame, fn func(*Frame) error) error

type Writer

+ func (w *Writer) EncodeFrame(stream int, frame *Frame) error

+ func (w *Writer) EncodeFrames(stream int, frames <-chan *Frame) error

+ func (w *Writer) WritePackets(packets <-chan *Packet) error

May 19, 2025

Changes in this version

type Manager

+ func (manager *Manager) Create(url string, format media.Format, meta []media.Metadata, streams ...media.Par) (media.Media, error)

+ func (manager *Manager) Decode(ctx context.Context, m media.Media, mapFunc media.MapFunc, ...) error

+ func (manager *Manager) Read(r io.Reader, format media.Format, opts ...string) (media.Media, error)

type Reader

+ func (r *Reader) Seek(stream int, secs float64) error

+ func (r *Reader) Streams(t media.Type) []*Stream

+ type Stream struct

+ func (s *Stream) Index() int

+ func (s *Stream) MarshalJSON() ([]byte, error)

+ func (s *Stream) Type() media.Type

type Writer

+ func (w *Writer) Type() media.Type

Aug 16, 2024

Changes in this version

type Frame

+ func (frame *Frame) SetFloat32(plane int, data []float32) error

+ func (frame *Frame) SetTs(secs float64)

Jul 31, 2024

Changes in this version

+ func SetLogging(verbose bool, fn LogFn)

+ type LogFn func(text string)

Jul 29, 2024

Changes in this version

+ const PTS_UNDEFINED

+ const TS_UNDEFINED

+ type Channel ff.AVChannel

+ func (ch *Channel) Description() string

+ func (ch *Channel) MarshalJSON() ([]byte, error)

+ func (ch *Channel) Name() string

+ func (ch *Channel) String() string

+ type ChannelLayout ff.AVChannelLayout

+ func (ch *ChannelLayout) Channels() []*Channel

+ func (ch *ChannelLayout) MarshalJSON() ([]byte, error)

+ func (ch *ChannelLayout) Name() string

+ func (ch *ChannelLayout) NumChannels() int

+ func (ch *ChannelLayout) Order() string

+ func (ch *ChannelLayout) String() string

+ type Codec ff.AVCodec

+ func (codec *Codec) ChannelLayouts() []string

+ func (codec *Codec) Description() string

+ func (codec *Codec) MarshalJSON() ([]byte, error)

+ func (codec *Codec) Name() string

+ func (codec *Codec) PixelFormats() []string

+ func (codec *Codec) Profiles() []string

+ func (codec *Codec) SampleFormats() []string

+ func (codec *Codec) SampleRates() []int

+ func (codec *Codec) String() string

+ func (codec *Codec) Type() media.Type

+ type Context struct

+ func (c *Context) Close() error

+ func (decoder *Context) C(stream int) chan *Frame

+ type Decoder struct

+ func NewDecoder(stream *ff.AVStream, dest *Par, force bool) (*Decoder, error)

+ func (d *Decoder) Close() error

+ type DecoderFrameFn func(int, *Frame) error

+ type DecoderMapFunc func(int, *Par) (*Par, error)

+ type Device struct

+ type Format struct

+ Devices []*Device

+ Input *ff.AVInputFormat

+ Output *ff.AVOutputFormat

+ func (f *Format) Description() string

+ func (f *Format) Name() string

+ func (f *Format) String() string

+ func (f *Format) Type() media.Type

type Frame

+ func (frame *Frame) AllocateBuffers() error

+ func (frame *Frame) Close() error

+ func (frame *Frame) Copy() (*Frame, error)

+ func (frame *Frame) CopyPropsFromFrame(other *Frame) error

+ func (frame *Frame) Float32(plane int) []float32

+ func (frame *Frame) FrameRate() ff.AVRational

+ func (frame *Frame) FrameSize() int

+ func (frame *Frame) FromImage(src image.Image) error

+ func (frame *Frame) IncPts(v int64)

+ func (frame *Frame) IsAllocated() bool

+ func (frame *Frame) MakeWritable() error

+ func (frame *Frame) Pts() int64

+ func (frame *Frame) SampleAspectRatio() ff.AVRational

+ func (frame *Frame) SampleRate() int

+ func (frame *Frame) SetPts(v int64)

+ func (frame *Frame) TimeBase() ff.AVRational

+ func (frame *Frame) Ts() float64

+ func (frame *Frame) Unref()

+ type LogFunc func(string)

+ type Manager struct

+ func NewManager(opt ...Opt) (*Manager, error)

+ func (manager *Manager) ChannelLayouts() []media.Metadata

+ func (manager *Manager) Codecs(t media.Type, name ...string) []media.Metadata

+ func (manager *Manager) Errorf(v string, args ...any)

+ func (manager *Manager) Formats(t media.Type, name ...string) []media.Format

+ func (manager *Manager) Infof(v string, args ...any)

+ func (manager *Manager) Open(url string, format media.Format, opts ...string) (media.Media, error)

+ func (manager *Manager) PixelFormats() []media.Metadata

+ func (manager *Manager) SampleFormats() []media.Metadata

+ func (manager *Manager) Version() []media.Metadata

+ func (manager *Manager) Warningf(v string, args ...any)

type Metadata

+ func (m *Metadata) Any() any

+ func (m *Metadata) Bytes() []byte

+ func (m *Metadata) Image() image.Image

type Opt

+ func OptContext(context *Context) Opt

+ func OptInputFormat(name string) Opt

+ func OptInputOpt(opt ...string) Opt

+ func OptLog(verbose bool, fn LogFunc) Opt

+ type Packet ff.AVPacket

+ func (packet *Packet) String() string

+ func (packet *Packet) Ts() float64

type Par

+ func (ctx *Par) CopyToCodecContext(codec *ff.AVCodecContext) error

+ func (ctx *Par) FrameRate() float64

+ func (ctx *Par) Type() media.Type

+ func (ctx *Par) WidthHeight() string

+ type PixelFormat ff.AVPixelFormat

+ func (pixfmt *PixelFormat) IsPlanar() bool

+ func (pixfmt *PixelFormat) MarshalJSON() ([]byte, error)

+ func (pixfmt *PixelFormat) Name() string

+ func (pixfmt *PixelFormat) NumPlanes() int

+ func (pixfmt *PixelFormat) String() string

+ type Re struct

+ func NewRe(par *Par, force bool) (*Re, error)

+ func (re *Re) Close() error

+ func (re *Re) Frame(src *Frame) (*Frame, error)

+ type Reader struct

+ func NewReader(r io.Reader, opt ...Opt) (*Reader, error)

+ func Open(url string, opt ...Opt) (*Reader, error)

+ func (r *Reader) BestStream(t media.Type) int

+ func (r *Reader) Close() error

+ func (r *Reader) Decode(ctx context.Context, mapfn DecoderMapFunc, decodefn DecoderFrameFn) error

+ func (r *Reader) DecodeWithContext(ctx context.Context, decoders *Context, decodefn DecoderFrameFn) error

+ func (r *Reader) Duration() time.Duration

+ func (r *Reader) Map(fn DecoderMapFunc) (*Context, error)

+ func (r *Reader) MarshalJSON() ([]byte, error)

+ func (r *Reader) Metadata(keys ...string) []*Metadata

+ func (r *Reader) String() string

+ func (r *Reader) Type() media.Type

+ type SampleFormat ff.AVSampleFormat

+ func (samplefmt *SampleFormat) BytesPerSample() int

+ func (samplefmt *SampleFormat) IsPlanar() bool

+ func (samplefmt *SampleFormat) MarshalJSON() ([]byte, error)

+ func (samplefmt *SampleFormat) Name() string

+ func (samplefmt *SampleFormat) String() string

type Writer

+ func (w *Writer) MarshalJSON() ([]byte, error)

+ func (w *Writer) String() string

Jun 30, 2024

Changes in this version

+ const MetaArtwork

+ func NewPacketDecoder(codec *ff.AVCodecContext, stream int) (*decoder, error)

+ func NewResampler(format ff.AVSampleFormat, opt ...Opt) (*resampler, error)

+ func NewRescaler(format ff.AVPixelFormat, opt ...Opt) (*rescaler, error)

+ type DecodeFn func(int, *ff.AVFrame) error

+ type Encoder struct

+ func NewEncoder(ctx *ff.AVFormatContext, stream int, par *Par) (*Encoder, error)

+ func (e *Encoder) Encode(frame *ff.AVFrame, fn EncoderPacketFn) error

+ func (e *Encoder) MarshalJSON() ([]byte, error)

+ func (e *Encoder) Par() *Par

+ func (e *Encoder) String() string

+ func (encoder *Encoder) Close() error

+ type EncoderFrameFn func(int) (*ff.AVFrame, error)

+ type EncoderPacketFn func(*ff.AVPacket, *ff.AVRational) error

+ type Frame struct

+ func NewFrame(ctx *ff.AVFrame, stream int) *Frame

+ func (frame *Frame) AVFrame() *ff.AVFrame

+ func (frame *Frame) Bytes(plane int) []byte

+ func (frame *Frame) ChannelLayout() string

+ func (frame *Frame) Height() int

+ func (frame *Frame) Id() int

+ func (frame *Frame) Image() (image.Image, error)

+ func (frame *Frame) Int16(plane int) []int16

+ func (frame *Frame) MarshalJSON() ([]byte, error)

+ func (frame *Frame) NumPlanes() int

+ func (frame *Frame) NumSamples() int

+ func (frame *Frame) PixelFormat() string

+ func (frame *Frame) SampleFormat() string

+ func (frame *Frame) Samplerate() int

+ func (frame *Frame) Stride(plane int) int

+ func (frame *Frame) String() string

+ func (frame *Frame) Time() time.Duration

+ func (frame *Frame) Type() media.MediaType

+ func (frame *Frame) Width() int

+ type Metadata struct

+ Key string

+ Value any

+ func NewMetadata(key string, value any) *Metadata

+ func (m *Metadata) String() string

+ type Opt func(*opts) error

+ func OptChannelLayout(layout string) Opt

+ func OptChannels(num int) Opt

+ func OptForce() Opt

+ func OptFrameSize(size string) Opt

+ func OptMetadata(entry ...*Metadata) Opt

+ func OptOutputFormat(name string) Opt

+ func OptPixFormat(format string) Opt

+ func OptSampleFormat(format string) Opt

+ func OptSampleRate(rate int) Opt

+ func OptStream(stream int, par *Par) Opt

+ func OptWidthHeight(w, h int) Opt

+ type Par struct

+ func AudioPar(samplefmt string, channellayout string, samplerate int) *Par

+ func NewAudioPar(samplefmt string, channellayout string, samplerate int) (*Par, error)

+ func NewVideoPar(pixfmt string, size string, framerate float64) (*Par, error)

+ func VideoPar(pixfmt string, size string, framerate float64) *Par

+ func (ctx *Par) CopyToCodec(codec *ff.AVCodecContext) error

+ func (ctx *Par) MarshalJSON() ([]byte, error)

+ func (ctx *Par) String() string

+ func (ctx *Par) ValidateFromCodec(codec *ff.AVCodecContext) error

+ type Writer struct

+ func Create(url string, opt ...Opt) (*Writer, error)

+ func NewWriter(w io.Writer, opt ...Opt) (*Writer, error)

+ func (w *Writer) Close() error

+ func (w *Writer) Encode(in EncoderFrameFn, out EncoderPacketFn) error

+ func (w *Writer) Stream(stream int) *Encoder

+ func (w *Writer) Write(packet *ff.AVPacket) error