diff --git a/TODO b/TODO
index 5d078b1..4e5292f 100644
--- a/TODO
+++ b/TODO
@@ -12,4 +12,7 @@
 1. 虚拟设备应当一直运行，无阻塞
 
 # 2022-10-10
-1. 视频设备延迟过高
\ No newline at end of file
+1. 视频设备延迟过高
+
+# 2022-10-11
+1. 解决视频设备延迟
\ No newline at end of file
diff --git a/lib/webrtcconnection/connection.go b/lib/webrtcconnection/connection.go
index 605beb7..07cb257 100644
--- a/lib/webrtcconnection/connection.go
+++ b/lib/webrtcconnection/connection.go
@@ -119,7 +119,7 @@ func setupCodec(videoBPS int) (*mediadevices.CodecSelector, error) {
 		return nil, err
 	}
 	x264Prarm.BitRate = videoBPS
-	x264Prarm.Preset = x264.PresetMedium
+	x264Prarm.Preset = x264.PresetFaster
 
 	opusParam, err := opus.NewParams()
 	if err != nil {
diff --git a/servers/qemuserver/server.go b/servers/qemuserver/server.go
index ef0b4d4..7d63af6 100644
--- a/servers/qemuserver/server.go
+++ b/servers/qemuserver/server.go
@@ -39,7 +39,7 @@ func NewServer(o *Options) (*Server, error) {
 		options:     o,
 		audioHeader: make(chan *audio.WavHeader, 1),
 		pcm:         make(chan []byte),
-		ppm:         make(chan io.ReadCloser, int(o.Video.FPS)), // to be configured
+		ppm:         make(chan io.ReadCloser), // to be configured
 	}
 
 	u, err := url.Parse(o.QmpAddress)
@@ -130,7 +130,7 @@ func (s *Server) Run() error {
 			case <-ticker.C:
 				continue
 			}
-			//<-ticker.C
+			<-ticker.C
 		}
 	}()