diff --git a/lib/audiodriver/wavfifo.go b/lib/audiodriver/wavfifo.go
index dd63514..245ff33 100644
--- a/lib/audiodriver/wavfifo.go
+++ b/lib/audiodriver/wavfifo.go
@@ -73,6 +73,7 @@ func (w *WavFIFODriver) Properties() []prop.Media {
 }
 
 func (w *WavFIFODriver) AudioRecord(p prop.Media) (audio.Reader, error) {
+	logrus.Debugf("wave header: %v", w.waveHeader)
 	offset := FmtHeaderOffset + FmtHeaderIDSize + FmtHeaderChunkSizeSize + int64(w.waveHeader.Size) + DataChunkIDSize + DataChunkSizeSize
 	if _, err := w.f.Seek(
 		offset,
@@ -105,6 +106,7 @@ func (w *WavFIFODriver) AudioRecord(p prop.Media) (audio.Reader, error) {
 		case <-w.closed:
 			return nil, func() {}, io.EOF
 		case pcmData, ok := <-pcm:
+			logrus.Debug("got %d bytes pcm data", len(pcmData))
 			if !ok {
 				return nil, func() {}, io.ErrClosedPipe
 			}
diff --git a/lib/webrtcconnection/connection.go b/lib/webrtcconnection/connection.go
index 29e6fa6..14456ea 100644
--- a/lib/webrtcconnection/connection.go
+++ b/lib/webrtcconnection/connection.go
@@ -4,7 +4,6 @@ import (
 	"github.com/pion/mediadevices"
 	"github.com/pion/mediadevices/pkg/codec/opus"
 	"github.com/pion/mediadevices/pkg/codec/x264"
-	"github.com/pion/mediadevices/pkg/prop"
 	"github.com/pion/webrtc/v3"
 	"github.com/sirupsen/logrus"
 )
@@ -56,8 +55,10 @@ func (c *Connection) Regist(offer *webrtc.SessionDescription) (*webrtc.SessionDe
 
 	s, err := mediadevices.GetUserMedia(mediadevices.MediaStreamConstraints{
 		Video: func(mtc *mediadevices.MediaTrackConstraints) {
-			mtc.Height = prop.IntExact(c.option.Video.Height)
-			mtc.Width = prop.IntExact(c.option.Video.Width)
+			/*
+				mtc.Height = prop.IntExact(c.option.Video.Height)
+				mtc.Width = prop.IntExact(c.option.Video.Width)
+			*/
 		},
 		Audio: func(mtc *mediadevices.MediaTrackConstraints) {},
 		Codec: codecSelector,
diff --git a/servers/qemuserver/options.go b/servers/qemuserver/options.go
index ff0a9be..7596494 100644
--- a/servers/qemuserver/options.go
+++ b/servers/qemuserver/options.go
@@ -31,8 +31,6 @@ func ExampleOptions() *Options {
 }
 
 func (o *Options) MakeFIFO() error {
-	if err := os.Remove(o.AudioPipe); err != nil {
-		return err
-	}
-	return syscall.Mkfifo(o.AudioDevice, 0600)
+	os.Remove(o.AudioPipe)
+	return syscall.Mkfifo(o.AudioPipe, 0600)
 }
diff --git a/servers/qemuserver/server.go b/servers/qemuserver/server.go
index a0c47df..baf0ebc 100644
--- a/servers/qemuserver/server.go
+++ b/servers/qemuserver/server.go
@@ -91,19 +91,6 @@ func (s *Server) startCapture(qemu *qemu.Domain) {
 	if err := s.options.MakeFIFO(); err != nil {
 		logrus.Fatal("failed to make pipe file: ", err)
 	}
-	if _, err := qemu.Run(qmp.Command{
-		Execute: "human-monitor-command",
-		Args: map[string]string{
-			"command-line": fmt.Sprintf(
-				"wavcapture %s %s",
-				s.options.AudioPipe,
-				s.options.AudioDevice,
-			),
-		},
-	}); err != nil {
-		logrus.Fatal("run audio command failed: ", err)
-	}
-	logrus.Debug("audio capture set")
 
 	if err := driver.GetManager().Register(
 		audiodriver.New(s.options.AudioPipe),
@@ -126,6 +113,19 @@ func (s *Server) startCapture(qemu *qemu.Domain) {
 		logrus.Fatal("video initialize failed: ", err)
 	}
 
+	if _, err := qemu.Run(qmp.Command{
+		Execute: "human-monitor-command",
+		Args: map[string]string{
+			"command-line": fmt.Sprintf(
+				"wavcapture %s %s",
+				s.options.AudioPipe,
+				s.options.AudioDevice,
+			),
+		},
+	}); err != nil {
+		logrus.Fatal("run audio command failed: ", err)
+	}
+	logrus.Debug("audio capture set")
 }
 
 func Setup(o *Options) {
diff --git a/servers/webserver/handlers.go b/servers/webserver/handlers.go
index 83b43af..298d883 100644
--- a/servers/webserver/handlers.go
+++ b/servers/webserver/handlers.go
@@ -25,7 +25,7 @@ func (s *Server) getInstruction(c *gin.Context) {
 }
 
 func (s *Server) exchangeSDP(c *gin.Context) {
-	var offer *webrtc.SessionDescription
+	offer := &webrtc.SessionDescription{}
 	if err := c.BindJSON(offer); err != nil {
 		c.JSON(http.StatusBadRequest, Response{
 			Succeed: false,
diff --git a/servers/webserver/routers.go b/servers/webserver/routers.go
index 378750f..2026ded 100644
--- a/servers/webserver/routers.go
+++ b/servers/webserver/routers.go
@@ -1,12 +1,30 @@
 package webserver
 
-import "github.com/gin-contrib/static"
+import (
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+)
 
 func (s *Server) setupRoute() {
-	s.webServer.
-		Use(static.Serve("/", newFS())).
-		POST("/api/v1/sdp", s.exchangeSDP).
-		GET("/api/v1/instruction", s.getInstruction).
-		GET("/api/v1/iceserver/url", s.getICEConfig).
-		GET("/api/v1/name", s.getName)
+	apiHandler := gin.New()
+	groupV1 := apiHandler.Group("/api/v1")
+	{
+		groupV1.
+			POST("/sdp", s.exchangeSDP).
+			GET("/instruction", s.getInstruction).
+			GET("/iceserver/url", s.getICEConfig).
+			GET("/name", s.getName)
+	}
+
+	s.webServer.Use(func(ctx *gin.Context) {
+		path := ctx.Request.RequestURI
+		logrus.Debug(path)
+		if strings.HasPrefix(path, "/api") {
+			apiHandler.HandleContext(ctx)
+		} else {
+			staticFileHandler()(ctx)
+		}
+	})
 }
diff --git a/servers/webserver/static.go b/servers/webserver/static.go
index 681329b..af18fc9 100644
--- a/servers/webserver/static.go
+++ b/servers/webserver/static.go
@@ -5,33 +5,33 @@ import (
 	"io/fs"
 	"net/http"
 	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
 )
 
 //go:generate cp -r ../../web/dist ./
 //go:embed dist
 var staticFiles embed.FS
 
-type ginFS struct {
-	fs http.FileSystem
-}
-
-func newFS() *ginFS {
-	f, _ := fs.Sub(staticFiles, "dist")
-	return &ginFS{
-		fs: http.FS(f),
+func staticFileHandler() gin.HandlerFunc {
+	sf, err := fs.Sub(staticFiles, "dist")
+	if err != nil {
+		logrus.Fatal("compile error: ", err)
 	}
-}
 
-func (s *ginFS) Exists(prefix string, filepath string) bool {
-	if p := strings.TrimPrefix(filepath, prefix); len(p) < len(filepath) {
-		if _, err := s.fs.Open(p); err != nil {
-			return false
+	fs := http.FileServer(http.FS(sf))
+
+	return func(ctx *gin.Context) {
+		defer ctx.Abort()
+		filename := strings.TrimLeft(ctx.Request.RequestURI, "/")
+
+		logrus.Debug("static file: ", filename)
+
+		if filename == "" {
+			filename = "index.html"
 		}
-		return true
-	}
-	return false
-}
 
-func (s *ginFS) Open(name string) (http.File, error) {
-	return s.fs.Open(name)
+		fs.ServeHTTP(ctx.Writer, ctx.Request)
+	}
 }