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)
}
func main() {
flag.Parse()
fnames := flag.Args()
if *mnote {
exif.RegisterParsers(mknote.All...)
}
for _, name := range fnames {
f, err := os.Open(name)
if err != nil {
log.Printf("err on %v: %v", name, err)
continue
}
x, err := exif.Decode(f)
if err != nil {
log.Printf("err on %v: %v", name, err)
continue
}
if *thumb {
data, err := x.JpegThumbnail()
if err != nil {
log.Fatal("no thumbnail present")
}
if _, err := os.Stdout.Write(data); err != nil {
log.Fatal(err)
}
return
}
fmt.Printf("\n---- Image '%v' ----\n", name)
x.Walk(Walker{})
}
}
