James Bardin
43665a71ae
- Verify that we error out immediately when an exif tag Count is MaxUint32, which is likely invalid. - Verify that we don't try to buffer more than the size of the image file if the tag has an extraordinarily large Count.
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
Like goexif? - Bitcoin tips welcome: 17w65FVqx196Qp7tfCCSLqyvsHUhiEEa7P
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 (
"fmt"
"log"
"os"
"github.com/rwcarlsen/goexif/exif"
"github.com/rwcarlsen/goexif/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)
}