octu0 / go-xevd

Go bindings for mpeg5/xevd

go-xevd

Go bindings for mpeg5/xevd
MPEG-5 EVC decoder.

Requirements

requires xevd install on your system

$ git clone https://github.com/mpeg5/xevd.git
$ cd xevd
$ mkdir build
$ cd build
$ cmake .. -DSET_PROF=BASE
$ make
$ make install

Usage

Decode

import "github.com/octu0/go-xevd"

func main() {
	decoder, err := xevd.CreateDefaultBaselineDecoder()
	if err != nil {
		panic(err)
	}
	defer decoder.Close()

	f, err := os.Open("./testdata/src.evc")
	if err != nil {
		panic(err)
	}
	defer f.Close()

	br := bufio.NewReader(f)
	if err := decoder.DecodeStream(br, func(buf *xevd.DecodeImageBuffer) {
		defer buf.Close()

		fmt.Printf("Frame:%s Slice:%s color:%s\n", buf.NALUnit, buf.Slice, buf.ColorSpace)
		// => Frame:IDR Slice:I color:YCbCr420

		if err := saveImage(buf.Img); err != nil {
			panic(err)
		}
	}); err != nil {
		panic(err)
	}
}

func saveImage(img image.Image) (string, error) {
	out, err := os.CreateTemp("/tmp", "out*.png")
	if err != nil {
		return "", err
	}
	defer out.Close()

	if err := png.Encode(out, img); err != nil {
		return "", err
	}
	return out.Name(), nil
}