goexif

Provides decoding of basic exif and tiff encoded data. Still in alpha - no guarantees. Suggestions and pull requests are welcome. Functionality is split into two packages - "exif" and "tiff" The exif package depends on the tiff package. Documentation can be found at http://godoc.org/github.com/rwcarlsen/goexif

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To install, in a terminal type:

go get github.com/rwcarlsen/goexif/exif

Or if you just want the tiff package:

go get github.com/rwcarlsen/goexif/tiff

Example usage:

package main

import (
  "os"
  "log"
  "fmt"

  "github.com/rwcarlsen/goexif/exif"
)

func main() {
	fname := "sample1.jpg"

	f, err := os.Open(fname)
	if err != nil {
		log.Fatal(err)
	}

	x, err := exif.Decode(f)
	defer f.Close()
	if err != nil {
		log.Fatal(err)
	}

	camModel, _ := x.Get(exif.Model)
	date, _ := x.Get(exif.DateTimeOriginal)
	fmt.Println(camModel.StringVal())
	fmt.Println(date.StringVal())

	focal, _ := x.Get(exif.FocalLength)
	numer, denom := focal.Rat2(0) // retrieve first (only) rat. value
	fmt.Printf("%v/%v", numer, denom)
}