Provides decoding of basic exif and tiff encoded data. This project is a fork of rwcarlsen/goexif with
many PR and patches integrated.
Suggestions and pull requests are welcome.
To install the exif extraction cli tool, in a terminal type:
go install github.com/BrianBland/goexif2/cmd/goexif2
goexif2 <file>.jpg
Functionality is split into two packages - "exif" and "tiff" The exif package depends on the tiff package.
go get github.com/BrianBland/goexif2/exif
go get github.com/BrianBland/goexif2/tiff
package main
import (
"fmt"
"log"
"os"
"github.com/BrianBland/goexif2/exif"
"github.com/BrianBland/goexif2/mknote"
)
func ExampleDecode() {
fname := "sample1.jpg"
f, err := os.Open(fname)
if err != nil {
log.Fatal(err)
}
// Optionally register camera makenote data parsing - currently Nikon and
// Canon are supported.
exif.RegisterParsers(mknote.All...)
x, err := exif.Decode(f)
if err != nil {
log.Fatal(err)
}
camModel, _ := x.Get(exif.Model) // normally, don't ignore errors!
fmt.Println(camModel.StringVal())
focal, _ := x.Get(exif.FocalLength)
numer, denom, _ := focal.Rat2(0) // retrieve first (only) rat. value
fmt.Printf("%v/%v", numer, denom)
// Two convenience functions exist for date/time taken and GPS coords:
tm, _ := x.DateTime()
fmt.Println("Taken: ", tm)
lat, long, _ := x.LatLong()
fmt.Println("lat, long: ", lat, ", ", long)
}