package main

import (
  "image"
  _ "image/jpeg"
  _ "image/png"
  "log"
  "os"

  "github.com/bep/gowebp/libwebp"
  "github.com/bep/gowebp/libwebp/webpoptions"
)

func main() {
  r, err := os.Open("/root/wl/tmp/d.png")
  if err != nil {
    log.Fatal(err)
  }

  img, _, err := image.Decode(r)
  if err != nil {
    log.Fatal(err)
  }
  f, err := os.Create("/root/wl/tmp/d.webp")
  if err != nil {
    log.Fatal(err)
  }

  err = libwebp.Encode(f, img, webpoptions.EncodingOptions{
    Quality: 75, EncodingPreset: webpoptions.EncodingPresetPhoto, UseSharpYuv: true,
  })
  if err != nil {
    log.Fatal(err)
  }
}