subpop / go_mediainfo

Golang bindings for libmediainfo

mediainfo

Golang binding for libmediainfo

Duration, Bitrate, Codec, Streams and a lot of other meta-information about media files can be extracted through it.

For now supports only media files with one stream. Bindings for MediaInfoList is not provided. It can be easy fixed if anybody ask me.

Works through MediaInfoDLL/MediaInfoDLL.h(dynamic load and so on), so your mediainfo installation should has it.

Supports direct reading files by name and reading data from []byte buffers(without copying it for C calls).

Documentation for libmediainfo is poor and ascetic, can be found here.

Your advices and suggestions are welcome!

Simple Example

package main

import (
    "fmt"
    mediainfo "github.com/lbryio/go_mediainfo"
    "os"
)

func main() {
    info, err := mediainfo.GetMediaInfo(os.Args[1])
    if err != nil {
        fmt.Printf("open failed: %v\n", err)
        os.Exit(1)
    }
    fmt.Printf("%v\n", info)
}

Example

package main

import (
    "fmt"
    mediainfo "github.com/lbryio/go_mediainfo"
    "os"
)

func main() {
    mi := mediainfo.NewMediaInfo()
    err := mi.OpenFile(os.Args[1])
    if err != nil {
        fmt.Printf("open failed: %v\n", err)
        os.Exit(1)
    }
    defer mi.Close()
    video := &mediainfo.SimpleMediaInfo{}
    g := &video.General
    g.DurationStr = mi.Get(mediainfo.MediaInfo_Stream_General, "Duration/String3")
    g.Duration = mi.GetInt(mediainfo.MediaInfo_Stream_General, "Duration")
    g.Start = mi.GetInt(mediainfo.MediaInfo_Stream_General, "Start")
    g.BitRate = mi.GetInt(mediainfo.MediaInfo_Stream_General, "OverallBitRate")
    g.FrameRate = mi.GetInt(mediainfo.MediaInfo_Stream_General, "FrameRate")
    g.FileSize = mi.GetInt(mediainfo.MediaInfo_Stream_General, "FileSize")

    g.GeneralCount = int(mi.GetInt(mediainfo.MediaInfo_Stream_General, "GeneralCount"))
    g.VideoCount = int(mi.GetInt(mediainfo.MediaInfo_Stream_General, "VideoCount"))
    g.AudioCount = int(mi.GetInt(mediainfo.MediaInfo_Stream_General, "AudioCount"))
    g.TextCount = int(mi.GetInt(mediainfo.MediaInfo_Stream_General, "TextCount"))
    g.OtherCount = int(mi.GetInt(mediainfo.MediaInfo_Stream_General, "OtherCount"))
    g.ImageCount = int(mi.GetInt(mediainfo.MediaInfo_Stream_General, "ImageCount"))
    g.MenuCount = int(mi.GetInt(mediainfo.MediaInfo_Stream_General, "MenuCount"))

    v := &video.Video
    v.CodecID = mi.Get(mediainfo.MediaInfo_Stream_Video, "CodecID")
    v.BitRate = mi.GetInt(mediainfo.MediaInfo_Stream_Video, "BitRate")
    v.Width = mi.GetInt(mediainfo.MediaInfo_Stream_Video, "Width")
    v.Height = mi.GetInt(mediainfo.MediaInfo_Stream_Video, "Height")
    v.Resolution = fmt.Sprintf("%dx%d", v.Width, v.Height)
    v.DAR = mi.Get(mediainfo.MediaInfo_Stream_Video, "DisplayAspectRatio/String")

    a := &video.Audio
    a.CodecID = mi.Get(mediainfo.MediaInfo_Stream_Audio, "CodecID")
    a.SamplingRate = mi.GetInt(mediainfo.MediaInfo_Stream_Audio, "SamplingRate")
    a.BitRate = mi.GetInt(mediainfo.MediaInfo_Stream_Audio, "BitRate")

    video.SubtitlesCnt = int(mi.GetInt(mediainfo.MediaInfo_Stream_Text, "StreamCount"))
    for i := 0; i < video.SubtitlesCnt; i++ {
        Format := mi.GetIdx(mediainfo.MediaInfo_Stream_Text, i, "Format")
        CodecID := mi.GetIdx(mediainfo.MediaInfo_Stream_Text, i, "CodecID")
        Title := mi.GetIdx(mediainfo.MediaInfo_Stream_Text, i, "Title")
        subtitles := mediainfo.SubtitlesInfo{Format: Format, CodecID: CodecID, Title: Title}
        video.Subtitles = append(video.Subtitles, subtitles)
    }
    fmt.Printf("%v\n", video)
}

Read the documentation for other functions

Contributing

You know=)