diff --git a/pkg/encoder/encoder.go b/pkg/encoder/encoder.go
index 5378e47c8..b8ef829ae 100644
--- a/pkg/encoder/encoder.go
+++ b/pkg/encoder/encoder.go
@@ -15,8 +15,7 @@ type (
 	InFrame  yuv.RawFrame
 	OutFrame []byte
 	Encoder  interface {
-		LoadBuf(input []byte)
-		Encode() []byte
+		Encode([]byte) []byte
 		IntraRefresh()
 		Info() string
 		SetFlip(bool)
@@ -75,10 +74,8 @@ func (v *Video) Encode(frame InFrame) OutFrame {
 	}
 
 	yCbCr := v.y.Process(yuv.RawFrame(frame), v.rot, v.pf)
-	v.codec.LoadBuf(yCbCr)
-	v.y.Put(&yCbCr)
-
-	if bytes := v.codec.Encode(); len(bytes) > 0 {
+	defer v.y.Put(&yCbCr)
+	if bytes := v.codec.Encode(yCbCr); len(bytes) > 0 {
 		return bytes
 	}
 	return nil
diff --git a/pkg/encoder/h264/x264.go b/pkg/encoder/h264/x264.go
index 6ca1f3aac..8e75f3ef2 100644
--- a/pkg/encoder/h264/x264.go
+++ b/pkg/encoder/h264/x264.go
@@ -122,13 +122,11 @@ func NewEncoder(w, h int, th int, opts *Options) (encoder *H264, err error) {
 	return
 }
 
-func (e *H264) LoadBuf(yuv []byte) {
+func (e *H264) Encode(yuv []byte) []byte {
 	e.in.img.plane[0] = (*C.uchar)(unsafe.Pointer(&yuv[0]))
 	e.in.img.plane[1] = (*C.uchar)(unsafe.Pointer(&yuv[e.y]))
 	e.in.img.plane[2] = (*C.uchar)(unsafe.Pointer(&yuv[e.y+e.uv]))
-}
 
-func (e *H264) Encode() []byte {
 	e.in.i_pts += 1
 
 	e.p.Pin(e.in.img.plane[0])
diff --git a/pkg/encoder/h264/x264_test.go b/pkg/encoder/h264/x264_test.go
index 09f22ae32..0fe1bb43e 100644
--- a/pkg/encoder/h264/x264_test.go
+++ b/pkg/encoder/h264/x264_test.go
@@ -9,8 +9,7 @@ func TestH264Encode(t *testing.T) {
 		return
 	}
 	data := make([]byte, 120*120*1.5)
-	h264.LoadBuf(data)
-	h264.Encode()
+	h264.Encode(data)
 	if err := h264.Shutdown(); err != nil {
 		t.Error(err)
 	}
@@ -25,7 +24,6 @@ func Benchmark(b *testing.B) {
 	}
 	data := make([]byte, int(float64(w)*float64(h)*1.5))
 	for i := 0; i < b.N; i++ {
-		h264.LoadBuf(data)
-		h264.Encode()
+		h264.Encode(data)
 	}
 }
diff --git a/pkg/encoder/vpx/libvpx.go b/pkg/encoder/vpx/libvpx.go
index 81988b9c6..8de6ff409 100644
--- a/pkg/encoder/vpx/libvpx.go
+++ b/pkg/encoder/vpx/libvpx.go
@@ -135,17 +135,13 @@ func NewEncoder(w, h int, opts *Options) (*Vpx, error) {
 	return &vpx, nil
 }
 
-func (vpx *Vpx) LoadBuf(yuv []byte) {
+// Encode encodes yuv image with the VPX8 encoder.
+// see: https://chromium.googlesource.com/webm/libvpx/+/master/examples/simple_encoder.c
+func (vpx *Vpx) Encode(yuv []byte) []byte {
 	C.vpx_img_read(&vpx.image, unsafe.Pointer(&yuv[0]))
 	if vpx.flipped {
 		C.vpx_img_flip(&vpx.image)
 	}
-}
-
-// Encode encodes yuv image with the VPX8 encoder.
-// see: https://chromium.googlesource.com/webm/libvpx/+/master/examples/simple_encoder.c
-func (vpx *Vpx) Encode() []byte {
-	var iter C.vpx_codec_iter_t
 
 	var flags C.int
 	if vpx.kfi > 0 && vpx.frameCount%vpx.kfi == 0 {
@@ -156,6 +152,7 @@ func (vpx *Vpx) Encode() []byte {
 	}
 	vpx.frameCount++
 
+	var iter C.vpx_codec_iter_t
 	fb := C.get_frame_buffer(&vpx.codecCtx, &iter)
 	if fb.ptr == nil {
 		return []byte{}