gmf

package module
v0.0.0-...-be727bc Latest Latest
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 Go to latest Published: Sep 6, 2022 License: MIT Imports: 15 Imported by: 42

README

Go FFmpeg Bindings

Installation

Prerequisites

Current master branch supports all major Go versions, starting from 1.6.

Build/install FFmpeg

build lastest version of ffmpeg, obtained from https://github.com/FFmpeg/FFmpeg
There is one required option, which is disabled by default, you should turn on: --enable-shared

E.g.:

./configure --prefix=/usr/local/ffmpeg --enable-shared
make
make install

Add pkgconfig path:

export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/ffmpeg/lib/pkgconfig/

Ensure, that PKG_CONFIG_PATH contains path to ffmpeg's pkgconfig folder.

# check it by running
pkg-config --libs libavformat

It should print valid path to the avformat library.

Now, just run

go get github.com/3d0c/gmf
Other methods

This package uses pkg-config way to obtain flags, includes and libraries path, so if you have ffmpeg installed, just ensure, that your installation has them (pkgconfig/ folder with proper pc files).

Docker containers

Thanks to @ergoz you can try a docker container riftbit/ffalpine

Thanks to @denismakogon there is one more project, worth to mention https://github.com/denismakogon/ffmpeg-debian

Usage

Please see examples.

Support and Contribution

If something doesn't work, just fix it. Do not hesitate to pull request.

Credits

I borrowed the name from project, abandoned on code.google.com/p/gmf. Original code is available here in intitial commit from 03 Apr 2013.

Documentation

Overview

Format.

Example 
package main

import (
	"errors"
	"fmt"
	"log"

	"github.com/3d0c/gmf"
)

func main() {
	outputfilename := "examples/sample-encoding1.mpg"
	dstWidth, dstHeight := 640, 480

	codec, err := gmf.FindEncoder(gmf.AV_CODEC_ID_MPEG1VIDEO)
	if err != nil {
		log.Fatal(err)
	}

	videoEncCtx := gmf.NewCodecCtx(codec)
	if videoEncCtx == nil {
		log.Fatal(errors.New("failed to create a new codec context"))
	}
	defer videoEncCtx.Free()

	outputCtx, err := gmf.NewOutputCtx(outputfilename)
	if err != nil {
		log.Fatal(errors.New("failed to create a new output context"))
	}
	defer outputCtx.Free()

	videoEncCtx.
		SetBitRate(400000).
		SetWidth(dstWidth).
		SetHeight(dstHeight).
		SetTimeBase(gmf.AVR{Num: 1, Den: 25}).
		SetPixFmt(gmf.AV_PIX_FMT_YUV420P).
		SetProfile(gmf.FF_PROFILE_MPEG4_SIMPLE).
		SetMbDecision(gmf.FF_MB_DECISION_RD)

	if outputCtx.IsGlobalHeader() {
		videoEncCtx.SetFlag(gmf.CODEC_FLAG_GLOBAL_HEADER)
	}

	videoStream := outputCtx.NewStream(codec)
	if videoStream == nil {
		log.Fatal(errors.New(fmt.Sprintf("Unable to create stream for videoEnc [%s]\n", codec.LongName())))
	}
	defer videoStream.Free()

	if err = videoEncCtx.Open(nil); err != nil {
		log.Fatal(err)
	}
	videoStream.DumpContexCodec(videoEncCtx)
	// videoStream.SetCodecCtx(videoEncCtx)

	outputCtx.SetStartTime(0)

	if err = outputCtx.WriteHeader(); err != nil {
		log.Fatal(err)
	}
	outputCtx.Dump()
	i := int64(0)
	n := 0

	for frame := range gmf.GenSyntVideoNewFrame(videoEncCtx.Width(), videoEncCtx.Height(), videoEncCtx.PixFmt()) {
		frame.SetPts(i)

		if p, err := frame.Encode(videoEncCtx); p != nil {
			if p.Pts() != gmf.AV_NOPTS_VALUE {
				p.SetPts(gmf.RescaleQ(p.Pts(), videoEncCtx.TimeBase(), videoStream.TimeBase()))
			}

			if p.Dts() != gmf.AV_NOPTS_VALUE {
				p.SetDts(gmf.RescaleQ(p.Dts(), videoEncCtx.TimeBase(), videoStream.TimeBase()))
			}

			if err := outputCtx.WritePacket(p); err != nil {
				log.Fatal(err)
			}

			n++

			log.Printf("Write frame=%d size=%v pts=%v dts=%v\n", frame.Pts(), p.Size(), p.Pts(), p.Dts())

			p.Free()
		} else if err != nil {
			log.Fatal(err)
		}

		frame.Free()
		i++
	}
	fmt.Println("frames written to examples/sample-encoding1.mpg")
}

Output:

frames written to examples/sample-encoding1.mpg

Index

Examples

Constants

View Source 
const (
	AVIO_FLAG_READ       = 1
	AVIO_FLAG_WRITE      = 2
	AVIO_FLAG_READ_WRITE = (AVIO_FLAG_READ | AVIO_FLAG_WRITE)
)
View Source 
const (
	AVCOL_RANGE_UNSPECIFIED = iota
	AVCOL_RANGE_MPEG        ///< the normal 219*2^(n-8) "MPEG" YUV ranges
	AVCOL_RANGE_JPEG        ///< the normal     2^n-1   "JPEG" YUV ranges
	AVCOL_RANGE_NB          ///< Not part of ABI
)
View Source 
const (
	AV_BUFFERSINK_FLAG_PEEK       = 1
	AV_BUFFERSINK_FLAG_NO_REQUEST = 2
	AV_BUFFERSRC_FLAG_PUSH        = 4
)
View Source 
const (
	AV_LOG_QUIET   int = C.AV_LOG_QUIET
	AV_LOG_PANIC   int = C.AV_LOG_PANIC
	AV_LOG_FATAL   int = C.AV_LOG_FATAL
	AV_LOG_ERROR   int = C.AV_LOG_ERROR
	AV_LOG_WARNING int = C.AV_LOG_WARNING
	AV_LOG_INFO    int = C.AV_LOG_INFO
	AV_LOG_VERBOSE int = C.AV_LOG_VERBOSE
	AV_LOG_DEBUG   int = C.AV_LOG_DEBUG

	FF_MOV_FLAG_FASTSTART = (1 << 7)

	AVFMT_FLAG_GENPTS int = C.AVFMT_FLAG_GENPTS
	AVFMTCTX_NOHEADER int = C.AVFMTCTX_NOHEADER
)
View Source 
const (
	PLAYLIST_TYPE_NONE int = iota
	PLAYLIST_TYPE_EVENT
	PLAYLIST_TYPE_VOD
	PLAYLIST_TYPE_NB
)
View Source 
const (
	AV_PICTURE_TYPE_NONE = iota // Undefined
	AV_PICTURE_TYPE_I           // Intra
	AV_PICTURE_TYPE_P           // Predicted
	AV_PICTURE_TYPE_B           // Bi-dir predicted
	AV_PICTURE_TYPE_S           // S(GMC)-VOP MPEG-4
	AV_PICTURE_TYPE_SI          // Switching Intra
	AV_PICTURE_TYPE_SP          // Switching Predicted
	AV_PICTURE_TYPE_BI          // BI type
)
View Source 
const (
	AVERROR_EOF = -541478725
)
View Source 
const (
	AV_PKT_FLAG_KEY = C.AV_PKT_FLAG_KEY // The packet contains a keyframe
)

Variables

View Source 
var (
	AVMEDIA_TYPE_AUDIO int32 = C.AVMEDIA_TYPE_AUDIO
	AVMEDIA_TYPE_VIDEO int32 = C.AVMEDIA_TYPE_VIDEO

	AV_PIX_FMT_BGR24    int32 = C.AV_PIX_FMT_BGR24
	AV_PIX_FMT_BGR32    int32 = C.AV_PIX_FMT_BGR32
	AV_PIX_FMT_GRAY8    int32 = C.AV_PIX_FMT_GRAY8
	AV_PIX_FMT_RGB24    int32 = C.AV_PIX_FMT_RGB24
	AV_PIX_FMT_RGB32    int32 = C.AV_PIX_FMT_RGB32
	AV_PIX_FMT_RGBA     int32 = C.AV_PIX_FMT_RGBA
	AV_PIX_FMT_BGRA     int32 = C.AV_PIX_FMT_BGRA
	AV_PIX_FMT_YUV410P  int32 = C.AV_PIX_FMT_YUV410P
	AV_PIX_FMT_YUV411P  int32 = C.AV_PIX_FMT_YUV411P
	AV_PIX_FMT_YUV420P  int32 = C.AV_PIX_FMT_YUV420P
	AV_PIX_FMT_YUV422P  int32 = C.AV_PIX_FMT_YUV422P
	AV_PIX_FMT_YUV444P  int32 = C.AV_PIX_FMT_YUV444P
	AV_PIX_FMT_YUVJ420P int32 = C.AV_PIX_FMT_YUVJ420P
	AV_PIX_FMT_YUVJ444P int32 = C.AV_PIX_FMT_YUVJ444P
	AV_PIX_FMT_YUVJ422P int32 = C.AV_PIX_FMT_YUVJ422P
	AV_PIX_FMT_YUYV422  int32 = C.AV_PIX_FMT_YUYV422
	AV_PIX_FMT_NONE     int32 = C.AV_PIX_FMT_NONE

	FF_PROFILE_AAC_MAIN      int = C.FF_PROFILE_AAC_MAIN
	FF_PROFILE_AAC_LOW       int = C.FF_PROFILE_AAC_LOW
	FF_PROFILE_AAC_SSR       int = C.FF_PROFILE_AAC_SSR
	FF_PROFILE_AAC_LTP       int = C.FF_PROFILE_AAC_LTP
	FF_PROFILE_AAC_HE        int = C.FF_PROFILE_AAC_HE
	FF_PROFILE_AAC_HE_V2     int = C.FF_PROFILE_AAC_HE_V2
	FF_PROFILE_AAC_LD        int = C.FF_PROFILE_AAC_LD
	FF_PROFILE_AAC_ELD       int = C.FF_PROFILE_AAC_ELD
	FF_PROFILE_MPEG2_AAC_LOW int = C.FF_PROFILE_MPEG2_AAC_LOW
	FF_PROFILE_MPEG2_AAC_HE  int = C.FF_PROFILE_MPEG2_AAC_HE

	FF_PROFILE_DTS         int = C.FF_PROFILE_DTS
	FF_PROFILE_DTS_ES      int = C.FF_PROFILE_DTS_ES
	FF_PROFILE_DTS_96_24   int = C.FF_PROFILE_DTS_96_24
	FF_PROFILE_DTS_HD_HRA  int = C.FF_PROFILE_DTS_HD_HRA
	FF_PROFILE_DTS_HD_MA   int = C.FF_PROFILE_DTS_HD_MA
	FF_PROFILE_DTS_EXPRESS int = C.FF_PROFILE_DTS_EXPRESS

	FF_PROFILE_MPEG2_422          int = C.FF_PROFILE_MPEG2_422
	FF_PROFILE_MPEG2_HIGH         int = C.FF_PROFILE_MPEG2_HIGH
	FF_PROFILE_MPEG2_SS           int = C.FF_PROFILE_MPEG2_SS
	FF_PROFILE_MPEG2_SNR_SCALABLE int = C.FF_PROFILE_MPEG2_SNR_SCALABLE
	FF_PROFILE_MPEG2_MAIN         int = C.FF_PROFILE_MPEG2_MAIN
	FF_PROFILE_MPEG2_SIMPLE       int = C.FF_PROFILE_MPEG2_SIMPLE

	FF_PROFILE_H264_BASELINE            int = C.FF_PROFILE_H264_BASELINE
	FF_PROFILE_H264_MAIN                int = C.FF_PROFILE_H264_MAIN
	FF_PROFILE_H264_EXTENDED            int = C.FF_PROFILE_H264_EXTENDED
	FF_PROFILE_H264_HIGH                int = C.FF_PROFILE_H264_HIGH
	FF_PROFILE_H264_HIGH_10             int = C.FF_PROFILE_H264_HIGH_10
	FF_PROFILE_H264_HIGH_422            int = C.FF_PROFILE_H264_HIGH_422
	FF_PROFILE_H264_HIGH_444            int = C.FF_PROFILE_H264_HIGH_444
	FF_PROFILE_H264_HIGH_444_PREDICTIVE int = C.FF_PROFILE_H264_HIGH_444_PREDICTIVE
	FF_PROFILE_H264_CAVLC_444           int = C.FF_PROFILE_H264_CAVLC_444

	FF_PROFILE_VC1_SIMPLE   int = C.FF_PROFILE_VC1_SIMPLE
	FF_PROFILE_VC1_MAIN     int = C.FF_PROFILE_VC1_MAIN
	FF_PROFILE_VC1_COMPLEX  int = C.FF_PROFILE_VC1_COMPLEX
	FF_PROFILE_VC1_ADVANCED int = C.FF_PROFILE_VC1_ADVANCED

	FF_PROFILE_MPEG4_SIMPLE                    int = C.FF_PROFILE_MPEG4_SIMPLE
	FF_PROFILE_MPEG4_SIMPLE_SCALABLE           int = C.FF_PROFILE_MPEG4_SIMPLE_SCALABLE
	FF_PROFILE_MPEG4_CORE                      int = C.FF_PROFILE_MPEG4_CORE
	FF_PROFILE_MPEG4_MAIN                      int = C.FF_PROFILE_MPEG4_MAIN
	FF_PROFILE_MPEG4_N_BIT                     int = C.FF_PROFILE_MPEG4_N_BIT
	FF_PROFILE_MPEG4_SCALABLE_TEXTURE          int = C.FF_PROFILE_MPEG4_SCALABLE_TEXTURE
	FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION     int = C.FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION
	FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE    int = C.FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE
	FF_PROFILE_MPEG4_HYBRID                    int = C.FF_PROFILE_MPEG4_HYBRID
	FF_PROFILE_MPEG4_ADVANCED_REAL_TIME        int = C.FF_PROFILE_MPEG4_ADVANCED_REAL_TIME
	FF_PROFILE_MPEG4_CORE_SCALABLE             int = C.FF_PROFILE_MPEG4_CORE_SCALABLE
	FF_PROFILE_MPEG4_ADVANCED_CODING           int = C.FF_PROFILE_MPEG4_ADVANCED_CODING
	FF_PROFILE_MPEG4_ADVANCED_CORE             int = C.FF_PROFILE_MPEG4_ADVANCED_CORE
	FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE int = C.FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE
	FF_PROFILE_MPEG4_SIMPLE_STUDIO             int = C.FF_PROFILE_MPEG4_SIMPLE_STUDIO
	FF_PROFILE_MPEG4_ADVANCED_SIMPLE           int = C.FF_PROFILE_MPEG4_ADVANCED_SIMPLE

	AV_NOPTS_VALUE int64 = C.INT64_MAX

	FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0  int = C.FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0
	FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1  int = C.FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1
	FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION int = C.FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION
	FF_PROFILE_JPEG2000_DCINEMA_2K             int = C.FF_PROFILE_JPEG2000_DCINEMA_2K
	FF_PROFILE_JPEG2000_DCINEMA_4K             int = C.FF_PROFILE_JPEG2000_DCINEMA_4K

	FF_PROFILE_VP9_0 int = C.FF_PROFILE_VP9_0
	FF_PROFILE_VP9_1 int = C.FF_PROFILE_VP9_1
	FF_PROFILE_VP9_2 int = C.FF_PROFILE_VP9_2
	FF_PROFILE_VP9_3 int = C.FF_PROFILE_VP9_3

	FF_PROFILE_HEVC_MAIN               int = C.FF_PROFILE_HEVC_MAIN
	FF_PROFILE_HEVC_MAIN_10            int = C.FF_PROFILE_HEVC_MAIN_10
	FF_PROFILE_HEVC_MAIN_STILL_PICTURE int = C.FF_PROFILE_HEVC_MAIN_STILL_PICTURE
	FF_PROFILE_HEVC_REXT               int = C.FF_PROFILE_HEVC_REXT
)
View Source 
var (
	AV_CODEC_ID_MPEG1VIDEO int = C.AV_CODEC_ID_MPEG1VIDEO
	AV_CODEC_ID_MPEG2VIDEO int = C.AV_CODEC_ID_MPEG2VIDEO
	AV_CODEC_ID_H264       int = C.AV_CODEC_ID_H264
	AV_CODEC_ID_H265       int = C.AV_CODEC_ID_H265
	AV_CODEC_ID_MPEG4      int = C.AV_CODEC_ID_MPEG4
	AV_CODEC_ID_JPEG2000   int = C.AV_CODEC_ID_JPEG2000
	AV_CODEC_ID_MJPEG      int = C.AV_CODEC_ID_MJPEG
	AV_CODEC_ID_MSMPEG4V1  int = C.AV_CODEC_ID_MSMPEG4V1
	AV_CODEC_ID_MSMPEG4V2  int = C.AV_CODEC_ID_MSMPEG4V2
	AV_CODEC_ID_MSMPEG4V3  int = C.AV_CODEC_ID_MSMPEG4V3
	AV_CODEC_ID_WMV1       int = C.AV_CODEC_ID_WMV1
	AV_CODEC_ID_WMV2       int = C.AV_CODEC_ID_WMV2
	AV_CODEC_ID_FLV1       int = C.AV_CODEC_ID_FLV1
	AV_CODEC_ID_PNG        int = C.AV_CODEC_ID_PNG
	AV_CODEC_ID_TIFF       int = C.AV_CODEC_ID_TIFF
	AV_CODEC_ID_GIF        int = C.AV_CODEC_ID_GIF
	AV_CODEC_ID_RAWVIDEO   int = C.AV_CODEC_ID_RAWVIDEO

	AV_CODEC_ID_AAC int = C.AV_CODEC_ID_AAC

	CODEC_FLAG_GLOBAL_HEADER int   = C.AV_CODEC_FLAG_GLOBAL_HEADER
	AV_CODEC_FLAG_QSCALE     int32 = C.AV_CODEC_FLAG_QSCALE

	FF_MB_DECISION_SIMPLE int = C.FF_MB_DECISION_SIMPLE
	FF_MB_DECISION_BITS   int = C.FF_MB_DECISION_BITS
	FF_MB_DECISION_RD     int = C.FF_MB_DECISION_RD

	FF_QP2LAMBDA int = C.FF_QP2LAMBDA

	AV_SAMPLE_FMT_U8  int32 = C.AV_SAMPLE_FMT_U8
	AV_SAMPLE_FMT_S16 int32 = C.AV_SAMPLE_FMT_S16
	AV_SAMPLE_FMT_S32 int32 = C.AV_SAMPLE_FMT_S32
	AV_SAMPLE_FMT_FLT int32 = C.AV_SAMPLE_FMT_FLT
	AV_SAMPLE_FMT_DBL int32 = C.AV_SAMPLE_FMT_DBL

	AV_SAMPLE_FMT_U8P  int32 = C.AV_SAMPLE_FMT_U8P
	AV_SAMPLE_FMT_S16P int32 = C.AV_SAMPLE_FMT_S16P
	AV_SAMPLE_FMT_S32P int32 = C.AV_SAMPLE_FMT_S32P
	AV_SAMPLE_FMT_FLTP int32 = C.AV_SAMPLE_FMT_FLTP
	AV_SAMPLE_FMT_DBLP int32 = C.AV_SAMPLE_FMT_DBLP
)
View Source 
var (
	FF_COMPLIANCE_VERY_STRICT  int = C.FF_COMPLIANCE_VERY_STRICT
	FF_COMPLIANCE_STRICT       int = C.FF_COMPLIANCE_STRICT
	FF_COMPLIANCE_NORMAL       int = C.FF_COMPLIANCE_NORMAL
	FF_COMPLIANCE_UNOFFICIAL   int = C.FF_COMPLIANCE_UNOFFICIAL
	FF_COMPLIANCE_EXPERIMENTAL int = C.FF_COMPLIANCE_EXPERIMENTAL
)
View Source 
var (
	SWS_FAST_BILINEAR int = C.SWS_FAST_BILINEAR
	SWS_BILINEAR      int = C.SWS_BILINEAR
	SWS_BICUBIC       int = C.SWS_BICUBIC
	SWS_X             int = C.SWS_X
	SWS_POINT         int = C.SWS_POINT
	SWS_AREA          int = C.SWS_AREA
	SWS_BICUBLIN      int = C.SWS_BICUBLIN
	SWS_GAUSS         int = C.SWS_GAUSS
	SWS_SINC          int = C.SWS_SINC
	SWS_LANCZOS       int = C.SWS_LANCZOS
	SWS_SPLINE        int = C.SWS_SPLINE
)
View Source 
var (
	AV_TIME_BASE   int        = C.AV_TIME_BASE
	AV_TIME_BASE_Q AVRational = AVRational{1, C.int(AV_TIME_BASE)}
)
View Source 
var Codecs []*CodecDescriptor
View Source 
var (
	IO_BUFFER_SIZE int = 32768
)

Functions

func AvErrno 

func AvErrno(ret int) syscall.Errno

func AvError 

func AvError(averr int) error

func CompareTimeStamp 

func CompareTimeStamp(aTimestamp int, aTimebase AVRational, bTimestamp int, bTimebase AVRational) int

func GenSyntVideoN 

func GenSyntVideoN(N, w, h int, fmt int32) chan *Frame

tmp

func GenSyntVideoNewFrame 

func GenSyntVideoNewFrame(w, h int, fmt int32) chan *Frame

Synthetic video generator. It produces 25 iteratable frames. Used for tests.

func GetSampleFmtName 

func GetSampleFmtName(fmt int32) string

func InitDesc 

func InitDesc()

func IsTimeCodeBetween 

func IsTimeCodeBetween(timeCodeToTest, timeCodeStart, timeCodeEnd string) (bool, error)

func LogSetLevel 

func LogSetLevel(level int)

func NewSample 

func NewSample(nbSamples, nbChannels int, format SampleFormat) error

func Release 

func Release(i CgoMemoryManager)

func Rescale 

func Rescale(a, b, c int64) int64

func RescaleDelta 

func RescaleDelta(inTb AVRational, inTs int64, fsTb AVRational, duration int, last *int64, outTb AVRational) int64

func RescaleQ 

func RescaleQ(a int64, encBase AVRational, stBase AVRational) int64

func RescaleQRnd 

func RescaleQRnd(a int64, encBase AVRational, stBase AVRational) int64

func RescaleTs 

func RescaleTs(pkt *Packet, encBase AVRational, stBase AVRational)

func TimeCodeToComparable 

func TimeCodeToComparable(timeCodeToTest, timeCodeStart, timeCodeEnd string) (hhToTest int, hhStart int, hhEnd int, err error)

func TimeCodeToHHMMSS 

func TimeCodeToHHMMSS(timeCode string) (int, int, int, int, error)

TimeCodeToHHMMSS splits a timeCode = "20:15:31:00" to return 20, 15, 31

func TimeCodeToHundredths 

func TimeCodeToHundredths(timeCode string) (int, error)

Types

type AVAudioFifo 

type AVAudioFifo struct {
	// contains filtered or unexported fields
}

func NewAVAudioFifo 

func NewAVAudioFifo(sampleFormat int32, channels int, nb_samples int) *AVAudioFifo

func (*AVAudioFifo) Free 

func (this *AVAudioFifo) Free()

func (*AVAudioFifo) Read 

func (this *AVAudioFifo) Read(sampleCount int) *Frame

func (*AVAudioFifo) SamplesCanWrite 

func (this *AVAudioFifo) SamplesCanWrite() int

func (*AVAudioFifo) SamplesToRead 

func (this *AVAudioFifo) SamplesToRead() int

func (*AVAudioFifo) Write 

func (this *AVAudioFifo) Write(frame *Frame) int

type AVIOContext 

type AVIOContext struct {
	CgoMemoryManage
	// contains filtered or unexported fields
}

func NewAVIOContext 

func NewAVIOContext(ctx *FmtCtx, handlers *AVIOHandlers, size ...int) (*AVIOContext, error)

AVIOContext constructor. Use it only if You need custom IO behaviour!

Example 
package main

import (
	"fmt"
	"github.com/3d0c/gmf"
	"io"
	"log"
	"os"
)

var inputSampleFilename string = "examples/tests-sample.mp4"

var section *io.SectionReader

func customReader() ([]byte, int) {
	var file *os.File
	var err error

	if section == nil {
		file, err = os.Open(inputSampleFilename)
		if err != nil {
			panic(err)
		}

		fi, err := file.Stat()
		if err != nil {
			panic(err)
		}

		section = io.NewSectionReader(file, 0, fi.Size())
	}

	b := make([]byte, gmf.IO_BUFFER_SIZE)

	n, err := section.Read(b)
	if err != nil {
		fmt.Println("section.Read():", err)
		file.Close()
	}

	return b, n
}

func main() {
	ctx := gmf.NewCtx()
	defer ctx.Free()

	// In this example, we're using custom reader implementation,
	// so we should specify format manually.
	if err := ctx.SetInputFormat("mov"); err != nil {
		log.Fatal(err)
	}

	avioCtx, err := gmf.NewAVIOContext(ctx, &gmf.AVIOHandlers{ReadPacket: customReader})
	defer avioCtx.Free()
	if err != nil {
		log.Fatal(err)
	}

	// Setting up AVFormatContext.pb
	ctx.SetPb(avioCtx)

	// Calling OpenInput with empty arg, because all files stuff we're doing in custom reader.
	// But the library have to initialize some stuff, so we call it anyway.
	ctx.OpenInput("")

	for p := range ctx.GetNewPackets() {
		_ = p
		p.Free()
	}
}

Output:

func (*AVIOContext) Flush 

func (c *AVIOContext) Flush()

func (*AVIOContext) Free 

func (c *AVIOContext) Free()

type AVIOHandlers 

type AVIOHandlers struct {
	ReadPacket  func() ([]byte, int)
	WritePacket func([]byte) int
	Seek        func(int64, int) int64
}

Functions prototypes for custom IO. Implement necessary prototypes and pass instance pointer to NewAVIOContext.

E.g.: 

func gridFsReader() ([]byte, int) {
	... implementation ...
	return data, length
}

avoictx := NewAVIOContext(ctx, &AVIOHandlers{ReadPacket: gridFsReader})

type AVR 

type AVR struct {
	Num int
	Den int
}

func (AVR) AVRational 

func (a AVR) AVRational() AVRational

func (AVR) Av2qd 

func (a AVR) Av2qd() float64

func (AVR) Invert 

func (a AVR) Invert() AVR

func (AVR) String 

func (a AVR) String() string

type AVRational 

type AVRational C.struct_AVRational

func AvInvQ 

func AvInvQ(q AVRational) AVRational

func (AVRational) AVR 

func (a AVRational) AVR() AVR

type CgoMemoryManage 

type CgoMemoryManage struct {
	// contains filtered or unexported fields
}

func (*CgoMemoryManage) Free 

func (c *CgoMemoryManage) Free()

func (*CgoMemoryManage) Release 

func (c *CgoMemoryManage) Release()

func (*CgoMemoryManage) Retain 

func (c *CgoMemoryManage) Retain()

func (*CgoMemoryManage) RetainCount 

func (c *CgoMemoryManage) RetainCount() int32

type CgoMemoryManager 

type CgoMemoryManager interface {
	Retain()
	RetainCount() int32
	Release()
	Free()
}

func Retain 

func Retain(i CgoMemoryManager) CgoMemoryManager

type Codec 

type Codec struct {
	CgoMemoryManage
	// contains filtered or unexported fields
}

func FindDecoder 

func FindDecoder(i interface{}) (*Codec, error)

func FindEncoder 

func FindEncoder(i interface{}) (*Codec, error)

func (*Codec) Free 

func (this *Codec) Free()

func (*Codec) Id 

func (this *Codec) Id() int

func (*Codec) IsDecoder 

func (this *Codec) IsDecoder() bool

func (*Codec) IsExperimental 

func (this *Codec) IsExperimental() bool

func (*Codec) LongName 

func (this *Codec) LongName() string

func (*Codec) Name 

func (this *Codec) Name() string

func (*Codec) Type 

func (this *Codec) Type() int

type CodecCtx 

type CodecCtx struct {
	CgoMemoryManage
	// contains filtered or unexported fields
}

func NewCodecCtx 

func NewCodecCtx(codec *Codec, options ...[]*Option) *CodecCtx

func (*CodecCtx) BitRate 

func (cc *CodecCtx) BitRate() int

func (*CodecCtx) ChannelLayout 

func (cc *CodecCtx) ChannelLayout() int

func (*CodecCtx) Channels 

func (cc *CodecCtx) Channels() int

func (*CodecCtx) Close 

func (cc *CodecCtx) Close()

func (*CodecCtx) CloseAndRelease 

func (cc *CodecCtx) CloseAndRelease()

func (*CodecCtx) Codec 

func (cc *CodecCtx) Codec() *Codec

func (*CodecCtx) CopyExtra 

func (cc *CodecCtx) CopyExtra(ist *Stream) *CodecCtx

func (*CodecCtx) Decode 

func (cc *CodecCtx) Decode(pkt *Packet) ([]*Frame, error)

func (*CodecCtx) Decode2 

func (cc *CodecCtx) Decode2(pkt *Packet) (*Frame, int)

func (*CodecCtx) Dump 

func (cc *CodecCtx) Dump()

func (*CodecCtx) Encode 

func (cc *CodecCtx) Encode(frames []*Frame, drain int) ([]*Packet, error)

func (*CodecCtx) FlushBuffers 

func (cc *CodecCtx) FlushBuffers()

func (*CodecCtx) FrameSize 

func (cc *CodecCtx) FrameSize() int

func (*CodecCtx) Free 

func (cc *CodecCtx) Free()

codec context is freed by avformat_free_context()

func (*CodecCtx) GetAspectRation 

func (cc *CodecCtx) GetAspectRation() AVRational

func (*CodecCtx) GetBFrames 

func (cc *CodecCtx) GetBFrames() int

func (*CodecCtx) GetBitsPerSample 

func (cc *CodecCtx) GetBitsPerSample() int

func (*CodecCtx) GetChannelLayoutName 

func (cc *CodecCtx) GetChannelLayoutName() string

func (*CodecCtx) GetCodecTag 

func (cc *CodecCtx) GetCodecTag() uint32

func (*CodecCtx) GetCodecTagName 

func (cc *CodecCtx) GetCodecTagName() string

func (*CodecCtx) GetCodedHeight 

func (cc *CodecCtx) GetCodedHeight() int

func (*CodecCtx) GetCodedWith 

func (cc *CodecCtx) GetCodedWith() int

func (*CodecCtx) GetColorRangeName 

func (cc *CodecCtx) GetColorRangeName() string

func (*CodecCtx) GetDefaultChannelLayout 

func (cc *CodecCtx) GetDefaultChannelLayout(ac int) int

func (*CodecCtx) GetFrameRate 

func (cc *CodecCtx) GetFrameRate() AVRational

func (*CodecCtx) GetGopSize 

func (cc *CodecCtx) GetGopSize() int

func (*CodecCtx) GetMediaType 

func (cc *CodecCtx) GetMediaType() string

func (*CodecCtx) GetPixFmtName 

func (cc *CodecCtx) GetPixFmtName() string

func (*CodecCtx) GetProfile 

func (cc *CodecCtx) GetProfile() int

func (*CodecCtx) GetProfileName 

func (cc *CodecCtx) GetProfileName() string

func (*CodecCtx) GetRefs 

func (cc *CodecCtx) GetRefs() int

func (*CodecCtx) GetSampleFmtName 

func (cc *CodecCtx) GetSampleFmtName() string

func (*CodecCtx) GetVideoSize 

func (cc *CodecCtx) GetVideoSize() string

func (*CodecCtx) Height 

func (cc *CodecCtx) Height() int

func (*CodecCtx) Id 

func (cc *CodecCtx) Id() int

func (*CodecCtx) IsOpen 

func (cc *CodecCtx) IsOpen() bool

func (*CodecCtx) Open 

func (cc *CodecCtx) Open(dict *Dict) error

func (*CodecCtx) PixFmt 

func (cc *CodecCtx) PixFmt() int32

func (*CodecCtx) Profile 

func (cc *CodecCtx) Profile() int

func (*CodecCtx) SampleFmt 

func (cc *CodecCtx) SampleFmt() int32

func (*CodecCtx) SampleRate 

func (cc *CodecCtx) SampleRate() int

func (*CodecCtx) SelectChannelLayout 

func (cc *CodecCtx) SelectChannelLayout() int

func (*CodecCtx) SelectSampleFmt 

func (cc *CodecCtx) SelectSampleFmt() int32

func (*CodecCtx) SelectSampleRate 

func (cc *CodecCtx) SelectSampleRate() int

func (*CodecCtx) SetBitRate 

func (cc *CodecCtx) SetBitRate(val int) *CodecCtx

func (*CodecCtx) SetBitsPerRawSample 

func (cc *CodecCtx) SetBitsPerRawSample(val int) *CodecCtx

func (*CodecCtx) SetChannelLayout 

func (cc *CodecCtx) SetChannelLayout(channelLayout int)

func (*CodecCtx) SetChannels 

func (cc *CodecCtx) SetChannels(val int) *CodecCtx

func (*CodecCtx) SetDimension 

func (cc *CodecCtx) SetDimension(w, h int) *CodecCtx

func (*CodecCtx) SetExtradata 

func (cc *CodecCtx) SetExtradata(extradata []byte) *CodecCtx

SetExtradata TODO: Improving performance 

Free or avcodec_free_context can free extradata

func (*CodecCtx) SetFlag 

func (cc *CodecCtx) SetFlag(flag int) *CodecCtx

func (*CodecCtx) SetFrameRate 

func (cc *CodecCtx) SetFrameRate(r AVR) *CodecCtx

func (*CodecCtx) SetGlobalQuality 

func (cc *CodecCtx) SetGlobalQuality(val int)

func (*CodecCtx) SetGopSize 

func (cc *CodecCtx) SetGopSize(val int) *CodecCtx

func (*CodecCtx) SetHasBframes 

func (cc *CodecCtx) SetHasBframes(val int) *CodecCtx

func (*CodecCtx) SetHeight 

func (cc *CodecCtx) SetHeight(val int) *CodecCtx

func (*CodecCtx) SetMaxBFrames 

func (cc *CodecCtx) SetMaxBFrames(val int) *CodecCtx

func (*CodecCtx) SetMbDecision 

func (cc *CodecCtx) SetMbDecision(val int) *CodecCtx

func (*CodecCtx) SetOpt 

func (cc *CodecCtx) SetOpt()

@todo

func (*CodecCtx) SetOptions 

func (cc *CodecCtx) SetOptions(options []Option)

func (*CodecCtx) SetPixFmt 

func (cc *CodecCtx) SetPixFmt(val int32) *CodecCtx

func (*CodecCtx) SetPktTimeBase 

func (cc *CodecCtx) SetPktTimeBase(val AVR)

func (*CodecCtx) SetProfile 

func (cc *CodecCtx) SetProfile(profile int) *CodecCtx

func (*CodecCtx) SetSampleFmt 

func (cc *CodecCtx) SetSampleFmt(val int32) *CodecCtx

func (*CodecCtx) SetSampleRate 

func (cc *CodecCtx) SetSampleRate(val int) *CodecCtx

func (*CodecCtx) SetStrictCompliance 

func (cc *CodecCtx) SetStrictCompliance(val int) *CodecCtx

func (*CodecCtx) SetThreadCount 

func (cc *CodecCtx) SetThreadCount(val int)

func (*CodecCtx) SetTimeBase 

func (cc *CodecCtx) SetTimeBase(val AVR) *CodecCtx

func (*CodecCtx) SetWidth 

func (cc *CodecCtx) SetWidth(val int) *CodecCtx

func (*CodecCtx) SupportedSampleRate 

func (cc *CodecCtx) SupportedSampleRate(val int) bool

func (*CodecCtx) TimeBase 

func (cc *CodecCtx) TimeBase() AVRational

func (*CodecCtx) Type 

func (cc *CodecCtx) Type() int32

func (*CodecCtx) Width 

func (cc *CodecCtx) Width() int

type CodecDescriptor 

type CodecDescriptor struct {
	IsEncoder bool
	// contains filtered or unexported fields
}

func (*CodecDescriptor) Id 

func (this *CodecDescriptor) Id() int

func (*CodecDescriptor) LongName 

func (this *CodecDescriptor) LongName() string

func (*CodecDescriptor) Name 

func (this *CodecDescriptor) Name() string

func (*CodecDescriptor) Props 

func (this *CodecDescriptor) Props() int

func (*CodecDescriptor) Type 

func (this *CodecDescriptor) Type() int

type CodecParameters 

type CodecParameters struct {
	// contains filtered or unexported fields
}

func NewCodecParameters 

func NewCodecParameters() *CodecParameters

func (*CodecParameters) BitRate 

func (cp *CodecParameters) BitRate() int64

func (*CodecParameters) CodecId 

func (cp *CodecParameters) CodecId() int

func (*CodecParameters) CodecType 

func (cp *CodecParameters) CodecType() int

func (*CodecParameters) Format 

func (cp *CodecParameters) Format() int32

Format video: the pixel format, the value corresponds to enum AVPixelFormat. audio: the sample format, the value corresponds to enum AVSampleFormat.

func (*CodecParameters) Free 

func (cp *CodecParameters) Free()

func (*CodecParameters) FromContext 

func (cp *CodecParameters) FromContext(cc *CodecCtx) error

func (*CodecParameters) Height 

func (cp *CodecParameters) Height() int

func (*CodecParameters) ToContext 

func (cp *CodecParameters) ToContext(cc *CodecCtx) error

func (*CodecParameters) Width 

func (cp *CodecParameters) Width() int

type Dict 

type Dict struct {
	// contains filtered or unexported fields
}

func NewDict 

func NewDict(pairs []Pair) *Dict

type Filter 

type Filter struct {
	// contains filtered or unexported fields
}

func NewFilter 

func NewFilter(desc string, srcStreams []*Stream, ost *Stream, options []*Option) (*Filter, error)

func (*Filter) AddFrame 

func (f *Filter) AddFrame(frame *Frame, istIdx int, flag int) error

func (*Filter) Close 

func (f *Filter) Close(istIdx int) error

func (*Filter) Dump 

func (f *Filter) Dump()

func (*Filter) GetFrame 

func (f *Filter) GetFrame() ([]*Frame, error)

func (*Filter) Release 

func (f *Filter) Release()

func (*Filter) RequestOldest 

func (f *Filter) RequestOldest() error

type FmtCtx 

type FmtCtx struct {
	Filename string
	// contains filtered or unexported fields
}

func NewCtx 

func NewCtx(options ...[]Option) *FmtCtx

@todo start_time is it needed?

func NewInputCtx 

func NewInputCtx(filename string) (*FmtCtx, error)

Just a helper for NewCtx().OpenInput()

func NewInputCtxWithFormatName 

func NewInputCtxWithFormatName(filename, format string) (*FmtCtx, error)

func NewOutputCtx 

func NewOutputCtx(i interface{}, options ...[]Option) (*FmtCtx, error)

func NewOutputCtxWithFormatName 

func NewOutputCtxWithFormatName(filename, format string) (*FmtCtx, error)

func (*FmtCtx) AddStreamWithCodeCtx 

func (ctx *FmtCtx) AddStreamWithCodeCtx(codeCtx *CodecCtx) (*Stream, error)

func (*FmtCtx) BitRate 

func (ctx *FmtCtx) BitRate() int64

Total stream bitrate in bit/s

func (*FmtCtx) Close 

func (ctx *FmtCtx) Close()

func (*FmtCtx) CloseInput 

func (ctx *FmtCtx) CloseInput()

func (*FmtCtx) CloseOutput 

func (ctx *FmtCtx) CloseOutput()

func (*FmtCtx) Dump 

func (ctx *FmtCtx) Dump()

func (*FmtCtx) DumpAv 

func (ctx *FmtCtx) DumpAv()

func (*FmtCtx) Duration 

func (ctx *FmtCtx) Duration() float64

func (*FmtCtx) FindStreamInfo 

func (ctx *FmtCtx) FindStreamInfo() error

func (*FmtCtx) Free 

func (ctx *FmtCtx) Free()

func (*FmtCtx) GetBestStream 

func (ctx *FmtCtx) GetBestStream(typ int32) (*Stream, error)

func (*FmtCtx) GetFirstPacketForStreamIndex 

func (ctx *FmtCtx) GetFirstPacketForStreamIndex(streamIndex int) (*Packet, error)

func (*FmtCtx) GetLastPacketForStreamIndex 

func (ctx *FmtCtx) GetLastPacketForStreamIndex(streamIndex int) (*Packet, error)

func (*FmtCtx) GetNewPackets 

func (ctx *FmtCtx) GetNewPackets() chan *Packet

func (*FmtCtx) GetNextPacket 

func (ctx *FmtCtx) GetNextPacket() (*Packet, error)

func (*FmtCtx) GetNextPacketForStreamIndex 

func (ctx *FmtCtx) GetNextPacketForStreamIndex(streamIndex int) (*Packet, error)

func (*FmtCtx) GetProbeSize 

func (ctx *FmtCtx) GetProbeSize() int64

func (*FmtCtx) GetSDPString 

func (ctx *FmtCtx) GetSDPString() (sdp string)

func (*FmtCtx) GetStream 

func (ctx *FmtCtx) GetStream(idx int) (*Stream, error)

func (*FmtCtx) IsGlobalHeader 

func (ctx *FmtCtx) IsGlobalHeader() bool

func (*FmtCtx) IsNoFile 

func (ctx *FmtCtx) IsNoFile() bool

func (*FmtCtx) NewStream 

func (ctx *FmtCtx) NewStream(c *Codec) *Stream

func (*FmtCtx) OpenInput 

func (ctx *FmtCtx) OpenInput(filename string) error

func (*FmtCtx) OpenInputWithOption 

func (ctx *FmtCtx) OpenInputWithOption(filename string, inputOptions *Option) error

func (*FmtCtx) Position 

func (ctx *FmtCtx) Position() int

func (*FmtCtx) SeekFile 

func (ctx *FmtCtx) SeekFile(ist *Stream, minTs, maxTs int64, flag int) error

func (*FmtCtx) SeekFrameAt 

func (ctx *FmtCtx) SeekFrameAt(sec int64, streamIndex int) error

func (*FmtCtx) SeekFrameAtTimeCode 

func (ctx *FmtCtx) SeekFrameAtTimeCode(timecode string, streamIndex int) error

func (*FmtCtx) SetDebug 

func (ctx *FmtCtx) SetDebug(val int) *FmtCtx

func (*FmtCtx) SetFlag 

func (ctx *FmtCtx) SetFlag(flag int) *FmtCtx

func (*FmtCtx) SetInputFormat 

func (ctx *FmtCtx) SetInputFormat(name string) error

func (*FmtCtx) SetOformat 

func (ctx *FmtCtx) SetOformat(ofmt *OutputFmt) error

func (*FmtCtx) SetOptions 

func (ctx *FmtCtx) SetOptions(options []*Option)

func (*FmtCtx) SetPb 

func (ctx *FmtCtx) SetPb(val *AVIOContext) *FmtCtx

func (*FmtCtx) SetProbeSize 

func (ctx *FmtCtx) SetProbeSize(v int64)

func (*FmtCtx) SetStartTime 

func (ctx *FmtCtx) SetStartTime(val int) *FmtCtx

func (*FmtCtx) StartTime 

func (ctx *FmtCtx) StartTime() int

func (*FmtCtx) StreamsCnt 

func (ctx *FmtCtx) StreamsCnt() int

Original structure member is called instead of len(this.streams) because there is no initialized Stream wrappers in input context.

func (*FmtCtx) TsOffset 

func (ctx *FmtCtx) TsOffset(stime int) int

func (*FmtCtx) WriteHeader 

func (ctx *FmtCtx) WriteHeader() error

func (*FmtCtx) WritePacket 

func (ctx *FmtCtx) WritePacket(p *Packet) error

func (*FmtCtx) WritePacketNoBuffer 

func (ctx *FmtCtx) WritePacketNoBuffer(p *Packet) error

func (*FmtCtx) WriteSDPFile 

func (ctx *FmtCtx) WriteSDPFile(filename string) error

func (*FmtCtx) WriteTrailer 

func (ctx *FmtCtx) WriteTrailer()

type Frame 

type Frame struct {
	// contains filtered or unexported fields
}

func DefaultResampler 

func DefaultResampler(ost *Stream, frames []*Frame, flush bool) []*Frame

func DefaultRescaler 

func DefaultRescaler(ctx *SwsCtx, frames []*Frame) ([]*Frame, error)

func NewAudioFrame 

func NewAudioFrame(sampleFormat int32, channels, nb_samples int) (*Frame, error)

func NewFrame 

func NewFrame() *Frame

func (*Frame) Channels 

func (f *Frame) Channels() int

func (*Frame) CloneNewFrame 

func (f *Frame) CloneNewFrame() *Frame

func (*Frame) Dump 

func (f *Frame) Dump()

func (*Frame) Encode 

func (f *Frame) Encode(enc *CodecCtx) (*Packet, error)

func (*Frame) Format 

func (f *Frame) Format() int

AVPixelFormat for video frames, AVSampleFormat for audio

func (*Frame) Free 

func (f *Frame) Free()

func (*Frame) GetChannelLayout 

func (f *Frame) GetChannelLayout() int

func (*Frame) GetRawAudioData 

func (f *Frame) GetRawAudioData(plane int) []byte

func (*Frame) GetRawFrame 

func (f *Frame) GetRawFrame() *C.struct_AVFrame

func (*Frame) GetSideDataTypes 

func (f *Frame) GetSideDataTypes() (map[uint32]string, error)

func (*Frame) GetTimeCode 

func (f *Frame) GetTimeCode(avgFrameRate AVRational) (string, error)

func (*Frame) GetUserData 

func (f *Frame) GetUserData() ([]byte, error)

func (*Frame) Height 

func (f *Frame) Height() int

func (*Frame) ImgAlloc 

func (f *Frame) ImgAlloc() error

func (*Frame) IsNil 

func (f *Frame) IsNil() bool

func (*Frame) KeyFrame 

func (f *Frame) KeyFrame() int

func (*Frame) LineSize 

func (f *Frame) LineSize(idx int) int

func (*Frame) NbSamples 

func (f *Frame) NbSamples() int

func (*Frame) PktDts 

func (f *Frame) PktDts() int

func (*Frame) PktPos 

func (f *Frame) PktPos() int64

func (*Frame) PktPts 

func (f *Frame) PktPts() int64

func (*Frame) Pts 

func (f *Frame) Pts() int64

func (*Frame) SetChannelLayout 

func (f *Frame) SetChannelLayout(val int) *Frame

func (*Frame) SetChannels 

func (f *Frame) SetChannels(val int) *Frame

func (*Frame) SetData 

func (f *Frame) SetData(idx int, lineSize int, data int) *Frame

func (*Frame) SetFormat 

func (f *Frame) SetFormat(val int32) *Frame

func (*Frame) SetHeight 

func (f *Frame) SetHeight(val int) *Frame

func (*Frame) SetNbSamples 

func (f *Frame) SetNbSamples(val int) *Frame

func (*Frame) SetPictType 

func (f *Frame) SetPictType(val uint32)

func (*Frame) SetPktDts 

func (f *Frame) SetPktDts(val int)

func (*Frame) SetPktPts 

func (f *Frame) SetPktPts(val int64)

func (*Frame) SetPts 

func (f *Frame) SetPts(val int64)

func (*Frame) SetQuality 

func (f *Frame) SetQuality(val int) *Frame

func (*Frame) SetWidth 

func (f *Frame) SetWidth(val int) *Frame

func (*Frame) Time 

func (f *Frame) Time(timebase AVRational) int

func (*Frame) Unref 

func (f *Frame) Unref()

func (*Frame) Width 

func (f *Frame) Width() int

type Image 

type Image struct {
	CgoMemoryManage
	// contains filtered or unexported fields
}

func NewImage 

func NewImage(w, h int, pixFmt int32, align int) (*Image, error)

@todo find better way to do allocation

func (*Image) Copy 

func (i *Image) Copy(frame *Frame)

func (*Image) Free 

func (i *Image) Free()

func (*Image) Size 

func (i *Image) Size() int

type Option 

type Option struct {
	Key string
	Val interface{}
}

func (Option) Set 

func (this Option) Set(ctx interface{})

type OutputFmt 

type OutputFmt struct {
	Filename string

	CgoMemoryManage
	// contains filtered or unexported fields
}

func FindOutputFmt 

func FindOutputFmt(format string, filename string, mime string) *OutputFmt

func (*OutputFmt) Free 

func (f *OutputFmt) Free()

func (*OutputFmt) Infomation 

func (f *OutputFmt) Infomation() string

func (*OutputFmt) LongName 

func (f *OutputFmt) LongName() string

func (*OutputFmt) MimeType 

func (f *OutputFmt) MimeType() string

func (*OutputFmt) Name 

func (f *OutputFmt) Name() string

type Packet 

type Packet struct {
	// contains filtered or unexported fields
}

func Init 

func Init() *Packet

Init same to NewPacket and av_new_packet 

Initialize optional fields of a packet with default values.
Note, this does not touch the data and size members, which have to be
initialized separately.

func NewPacket 

func NewPacket() *Packet

func (*Packet) Clone 

func (p *Packet) Clone() *Packet

func (*Packet) Data 

func (p *Packet) Data() []byte

func (*Packet) Dts 

func (p *Packet) Dts() int64

func (*Packet) Dump 

func (p *Packet) Dump()

func (*Packet) Duration 

func (p *Packet) Duration() int64

func (*Packet) Flags 

func (p *Packet) Flags() int

func (*Packet) Free 

func (p *Packet) Free()

func (*Packet) FreeData 

func (p *Packet) FreeData() *Packet

FreeData free data when use SetData 

p := gmf.NewPacket()
defer p.Free()
p.SetData([]byte{0x00, 0x00, 0x00, 0x01, 0x67})
defer p.FreeData()

func (*Packet) Pos 

func (p *Packet) Pos() int64

func (*Packet) Pts 

func (p *Packet) Pts() int64

func (*Packet) SetData 

func (p *Packet) SetData(data []byte) *Packet

SetData [NOT SUGGESTED] should free data later 

p := gmf.NewPacket()
defer p.Free()
p.SetData([]byte{0x00, 0x00, 0x00, 0x01, 0x67})
defer p.FreeData()
Example 
package main

import (
	"github.com/3d0c/gmf"
)

func main() {
	p := gmf.NewPacket()
	defer p.Free()
	p.SetData([]byte{0x00, 0x00, 0x00, 0x01, 0x67})
	defer p.FreeData()
}

Output:

func (*Packet) SetDts 

func (p *Packet) SetDts(val int64) *Packet

func (*Packet) SetDuration 

func (p *Packet) SetDuration(duration int64) *Packet

func (*Packet) SetFlags 

func (p *Packet) SetFlags(flags int) *Packet
Example 
package main

import (
	"github.com/3d0c/gmf"
)

func main() {
	p := gmf.NewPacket()
	p.SetFlags(p.Flags() | gmf.AV_PKT_FLAG_KEY)
	defer p.Free()
}

Output:

func (*Packet) SetPts 

func (p *Packet) SetPts(pts int64) *Packet

func (*Packet) SetStreamIndex 

func (p *Packet) SetStreamIndex(val int) *Packet

func (*Packet) Size 

func (p *Packet) Size() int

func (*Packet) StreamIndex 

func (p *Packet) StreamIndex() int

func (*Packet) Time 

func (p *Packet) Time(timebase AVRational) int

type Pair 

type Pair struct {
	Key string
	Val string
}

type Sample 

type Sample struct {
	CgoMemoryManage
	// contains filtered or unexported fields
}

func (*Sample) SampleRealloc 

func (s *Sample) SampleRealloc(nbSamples, nbChannels int) error

type SampleFormat 

type SampleFormat int

type Stream 

type Stream struct {
	SwsCtx *SwsCtx
	SwrCtx *SwrCtx
	AvFifo *AVAudioFifo

	Pts int64
	CgoMemoryManage
	// contains filtered or unexported fields
}

func (*Stream) CodecCtx 

func (s *Stream) CodecCtx() *CodecCtx

CodecCtx Deprecated: Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.

func (*Stream) CodecPar 

func (s *Stream) CodecPar() *CodecParameters

func (*Stream) CopyCodecPar 

func (s *Stream) CopyCodecPar(cp *CodecParameters) error

func (*Stream) DumpContexCodec 

func (s *Stream) DumpContexCodec(codec *CodecCtx)

func (*Stream) Duration 

func (s *Stream) Duration() int64

func (*Stream) Free 

func (s *Stream) Free()

func (*Stream) GetAvgFrameRate 

func (s *Stream) GetAvgFrameRate() AVRational

func (*Stream) GetCodecPar 

func (s *Stream) GetCodecPar() *CodecParameters

func (*Stream) GetRFrameRate 

func (s *Stream) GetRFrameRate() AVRational

func (*Stream) GetStartTime 

func (s *Stream) GetStartTime() int64

func (*Stream) Id 

func (s *Stream) Id() int

func (*Stream) Index 

func (s *Stream) Index() int

func (*Stream) IsAudio 

func (s *Stream) IsAudio() bool

func (*Stream) IsCodecCtxSet 

func (s *Stream) IsCodecCtxSet() bool

IsCodecCtxSet Deprecated: Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.

func (*Stream) IsVideo 

func (s *Stream) IsVideo() bool

func (*Stream) NbFrames 

func (s *Stream) NbFrames() int

func (*Stream) SetAvgFrameRate 

func (s *Stream) SetAvgFrameRate(val AVR)

func (*Stream) SetCodecCtx 

func (s *Stream) SetCodecCtx(cc *CodecCtx)

SetCodecCtx Deprecated: Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.

func (*Stream) SetCodecFlags 

func (s *Stream) SetCodecFlags()

func (*Stream) SetCodecPar 

func (s *Stream) SetCodecPar(cp *CodecParameters) error

func (*Stream) SetRFrameRate 

func (s *Stream) SetRFrameRate(val AVR)

func (*Stream) SetTimeBase 

func (s *Stream) SetTimeBase(val AVR) *Stream

func (*Stream) TimeBase 

func (s *Stream) TimeBase() AVRational

func (*Stream) Type 

func (s *Stream) Type() int32

type SwrCtx 

type SwrCtx struct {
	// contains filtered or unexported fields
}

func NewSwrCtx 

func NewSwrCtx(options []*Option, channels int, format int32) (*SwrCtx, error)

func (*SwrCtx) Convert 

func (ctx *SwrCtx) Convert(input *Frame) (*Frame, error)

func (*SwrCtx) Flush 

func (ctx *SwrCtx) Flush(nbSamples int) (*Frame, error)

func (*SwrCtx) Free 

func (ctx *SwrCtx) Free()

type SwsCtx 

type SwsCtx struct {
	// contains filtered or unexported fields
}

func NewSwsCtx 

func NewSwsCtx(srcW, srcH int, srcPixFmt int32, dstW, dstH int, dstPixFmt int32, method int) (*SwsCtx, error)

func (*SwsCtx) Free 

func (ctx *SwsCtx) Free()

func (*SwsCtx) Scale 

func (ctx *SwsCtx) Scale(src *Frame, dst *Frame)

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