diff --git a/libs/hbb_common/protos/message.proto b/libs/hbb_common/protos/message.proto
index 2044388f8..7b4bc3787 100644
--- a/libs/hbb_common/protos/message.proto
+++ b/libs/hbb_common/protos/message.proto
@@ -72,6 +72,11 @@ message Features {
   bool privacy_mode = 1;
 }
 
+message SupportedEncoding {
+  bool h264 = 1;
+  bool h265 = 2;
+}
+
 message PeerInfo {
   string username = 1;
   string hostname = 2;
@@ -82,6 +87,7 @@ message PeerInfo {
   string version = 7;
   int32 conn_id = 8;
   Features features = 9;
+  SupportedEncoding encoding = 10;
 }
 
 message LoginResponse {
@@ -434,9 +440,17 @@ enum ImageQuality {
 }
 
 message VideoCodecState {
-  int32 ScoreVpx = 1;
-  int32 ScoreH264 = 2;
-  int32 ScoreH265 = 3;
+  enum PerferCodec {
+    Auto = 0;
+    VPX = 1;
+    H264 = 2;
+    H265 = 3;
+  }
+
+  int32 score_vpx = 1;
+  int32 score_h264 = 2;
+  int32 score_h265 = 3;
+  PerferCodec perfer = 4;
 }
 
 message OptionMessage {
diff --git a/libs/scrap/src/common/codec.rs b/libs/scrap/src/common/codec.rs
index b48053e0b..1a18a79c3 100644
--- a/libs/scrap/src/common/codec.rs
+++ b/libs/scrap/src/common/codec.rs
@@ -16,7 +16,11 @@ use hbb_common::{
     ResultType,
 };
 #[cfg(feature = "hwcodec")]
-use hbb_common::{config::Config2, lazy_static};
+use hbb_common::{
+    config::{Config2, PeerConfig},
+    lazy_static,
+    message_proto::video_codec_state::PerferCodec,
+};
 
 #[cfg(feature = "hwcodec")]
 lazy_static::lazy_static! {
@@ -113,7 +117,6 @@ impl Encoder {
 
     // TODO
     pub fn update_video_encoder(id: i32, update: EncoderUpdate) {
-        log::info!("encoder update: {:?}", update);
         #[cfg(feature = "hwcodec")]
         {
             let mut states = PEER_DECODER_STATES.lock().unwrap();
@@ -130,49 +133,75 @@ impl Encoder {
                     }
                 }
             }
-            let current_encoder_name = HwEncoder::current_name();
+            let name = HwEncoder::current_name();
             if states.len() > 0 {
                 let best = HwEncoder::best();
                 let enabled_h264 = best.h264.is_some()
                     && states.len() > 0
-                    && states.iter().all(|(_, s)| s.ScoreH264 > 0);
+                    && states.iter().all(|(_, s)| s.score_h264 > 0);
                 let enabled_h265 = best.h265.is_some()
                     && states.len() > 0
-                    && states.iter().all(|(_, s)| s.ScoreH265 > 0);
+                    && states.iter().all(|(_, s)| s.score_h265 > 0);
 
-                // score encoder
-                let mut score_vpx = SCORE_VPX;
-                let mut score_h264 = best.h264.as_ref().map_or(0, |c| c.score);
-                let mut score_h265 = best.h265.as_ref().map_or(0, |c| c.score);
-
-                // score decoder
-                score_vpx += states.iter().map(|s| s.1.ScoreVpx).sum::<i32>();
-                if enabled_h264 {
-                    score_h264 += states.iter().map(|s| s.1.ScoreH264).sum::<i32>();
-                }
-                if enabled_h265 {
-                    score_h265 += states.iter().map(|s| s.1.ScoreH265).sum::<i32>();
+                // Preference first
+                let mut preference = PerferCodec::Auto;
+                let preferences: Vec<_> = states
+                    .iter()
+                    .filter(|(_, s)| {
+                        s.perfer == PerferCodec::VPX.into()
+                            || s.perfer == PerferCodec::H264.into() && enabled_h264
+                            || s.perfer == PerferCodec::H265.into() && enabled_h265
+                    })
+                    .map(|(_, s)| s.perfer)
+                    .collect();
+                if preferences.len() > 0 && preferences.iter().all(|&p| p == preferences[0]) {
+                    preference = preferences[0].enum_value_or(PerferCodec::Auto);
                 }
 
-                if enabled_h265 && score_h265 >= score_vpx && score_h265 >= score_h264 {
-                    *current_encoder_name.lock().unwrap() = Some(best.h265.unwrap().name);
-                } else if enabled_h264 && score_h264 >= score_vpx && score_h264 >= score_h265 {
-                    *current_encoder_name.lock().unwrap() = Some(best.h264.unwrap().name);
-                } else {
-                    *current_encoder_name.lock().unwrap() = None;
+                match preference {
+                    PerferCodec::VPX => *name.lock().unwrap() = None,
+                    PerferCodec::H264 => {
+                        *name.lock().unwrap() = best.h264.map_or(None, |c| Some(c.name))
+                    }
+                    PerferCodec::H265 => {
+                        *name.lock().unwrap() = best.h265.map_or(None, |c| Some(c.name))
+                    }
+                    PerferCodec::Auto => {
+                        // score encoder
+                        let mut score_vpx = SCORE_VPX;
+                        let mut score_h264 = best.h264.as_ref().map_or(0, |c| c.score);
+                        let mut score_h265 = best.h265.as_ref().map_or(0, |c| c.score);
+
+                        // score decoder
+                        score_vpx += states.iter().map(|s| s.1.score_vpx).sum::<i32>();
+                        if enabled_h264 {
+                            score_h264 += states.iter().map(|s| s.1.score_h264).sum::<i32>();
+                        }
+                        if enabled_h265 {
+                            score_h265 += states.iter().map(|s| s.1.score_h265).sum::<i32>();
+                        }
+
+                        if enabled_h265 && score_h265 >= score_vpx && score_h265 >= score_h264 {
+                            *name.lock().unwrap() = best.h265.map_or(None, |c| Some(c.name));
+                        } else if enabled_h264
+                            && score_h264 >= score_vpx
+                            && score_h264 >= score_h265
+                        {
+                            *name.lock().unwrap() = best.h264.map_or(None, |c| Some(c.name));
+                        } else {
+                            *name.lock().unwrap() = None;
+                        }
+                    }
                 }
+
                 log::info!(
-                    "connection count:{}, h264:{}, h265:{}, score: vpx({}), h264({}), h265({}), set current encoder name {:?}",
+                    "connection count:{}, used preference:{:?}, encoder:{:?}",
                     states.len(),
-                    enabled_h264,
-                    enabled_h265,
-                    score_vpx,
-                    score_h264,
-                    score_h265,
-                    current_encoder_name.lock().unwrap()
-                    )
+                    preference,
+                    name.lock().unwrap()
+                )
             } else {
-                *current_encoder_name.lock().unwrap() = None;
+                *name.lock().unwrap() = None;
             }
         }
         #[cfg(not(feature = "hwcodec"))]
@@ -192,34 +221,51 @@ impl Encoder {
         #[cfg(not(feature = "hwcodec"))]
         return None;
     }
+
+    pub fn supported_encoding() -> (bool, bool) {
+        #[cfg(feature = "hwcodec")]
+        if check_hwcodec_config() {
+            let best = HwEncoder::best();
+            (
+                best.h264.as_ref().map_or(false, |c| c.score > 0),
+                best.h265.as_ref().map_or(false, |c| c.score > 0),
+            )
+        } else {
+            (false, false)
+        }
+        #[cfg(not(feature = "hwcodec"))]
+        (false, false)
+    }
 }
 
 #[cfg(feature = "hwcodec")]
 impl Drop for Decoder {
     fn drop(&mut self) {
         *MY_DECODER_STATE.lock().unwrap() = VideoCodecState {
-            ScoreVpx: SCORE_VPX,
+            score_vpx: SCORE_VPX,
             ..Default::default()
         };
     }
 }
 
 impl Decoder {
-    pub fn video_codec_state() -> VideoCodecState {
+    pub fn video_codec_state(_id: &str) -> VideoCodecState {
         // video_codec_state is mainted by creation and destruction of Decoder.
         // It has been ensured to use after Decoder's creation.
         #[cfg(feature = "hwcodec")]
         if check_hwcodec_config() {
-            return MY_DECODER_STATE.lock().unwrap().clone();
+            let mut state = MY_DECODER_STATE.lock().unwrap();
+            state.perfer = Self::codec_preference(_id).into();
+            state.clone()
         } else {
             return VideoCodecState {
-                ScoreVpx: SCORE_VPX,
+                score_vpx: SCORE_VPX,
                 ..Default::default()
             };
         }
         #[cfg(not(feature = "hwcodec"))]
         VideoCodecState {
-            ScoreVpx: SCORE_VPX,
+            score_vpx: SCORE_VPX,
             ..Default::default()
         }
     }
@@ -237,9 +283,9 @@ impl Decoder {
         #[cfg(feature = "hwcodec")]
         {
             let mut state = MY_DECODER_STATE.lock().unwrap();
-            state.ScoreVpx = SCORE_VPX;
-            state.ScoreH264 = decoder.hw.h264.as_ref().map_or(0, |d| d.info.score);
-            state.ScoreH265 = decoder.hw.h265.as_ref().map_or(0, |d| d.info.score);
+            state.score_vpx = SCORE_VPX;
+            state.score_h264 = decoder.hw.h264.as_ref().map_or(0, |d| d.info.score);
+            state.score_h265 = decoder.hw.h265.as_ref().map_or(0, |d| d.info.score);
         }
 
         decoder
@@ -316,6 +362,23 @@ impl Decoder {
         }
         return Ok(ret);
     }
+
+    #[cfg(feature = "hwcodec")]
+    fn codec_preference(id: &str) -> PerferCodec {
+        let codec = PeerConfig::load(id)
+            .options
+            .get("codec-preference")
+            .map_or("".to_owned(), |c| c.to_owned());
+        if codec == "vp9" {
+            PerferCodec::VPX
+        } else if codec == "h264" {
+            PerferCodec::H264
+        } else if codec == "h265" {
+            PerferCodec::H265
+        } else {
+            PerferCodec::Auto
+        }
+    }
 }
 
 #[cfg(feature = "hwcodec")]
diff --git a/src/client.rs b/src/client.rs
index 28101896e..dbea079ea 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -784,6 +784,7 @@ pub struct LoginConfigHandler {
     pub conn_id: i32,
     features: Option<Features>,
     session_id: u64,
+    pub supported_encoding: Option<(bool, bool)>,
 }
 
 impl Deref for LoginConfigHandler {
@@ -808,6 +809,7 @@ impl LoginConfigHandler {
         self.remember = !config.password.is_empty();
         self.config = config;
         self.session_id = rand::random();
+        self.supported_encoding = None;
     }
 
     pub fn should_auto_login(&self) -> String {
@@ -958,8 +960,7 @@ impl LoginConfigHandler {
             msg.disable_clipboard = BoolOption::Yes.into();
             n += 1;
         }
-        // TODO: add option
-        let state = Decoder::video_codec_state();
+        let state = Decoder::video_codec_state(&self.id);
         msg.video_codec_state = hbb_common::protobuf::MessageField::some(state);
         n += 1;
 
@@ -1111,6 +1112,10 @@ impl LoginConfigHandler {
         self.conn_id = pi.conn_id;
         // no matter if change, for update file time
         self.save_config(config);
+        #[cfg(feature = "hwcodec")]
+        {
+            self.supported_encoding = Some((pi.encoding.h264, pi.encoding.h265));
+        }
     }
 
     pub fn get_remote_dir(&self) -> String {
@@ -1163,6 +1168,18 @@ impl LoginConfigHandler {
         msg_out.set_login_request(lr);
         msg_out
     }
+
+    pub fn change_prefer_codec(&self) -> Message {
+        let state = scrap::codec::Decoder::video_codec_state(&self.id);
+        let mut misc = Misc::new();
+        misc.set_option(OptionMessage {
+            video_codec_state: hbb_common::protobuf::MessageField::some(state),
+            ..Default::default()
+        });
+        let mut msg_out = Message::new();
+        msg_out.set_misc(misc);
+        msg_out
+    }
 }
 
 pub enum MediaData {
diff --git a/src/server/connection.rs b/src/server/connection.rs
index 869df4196..8b0b3f192 100644
--- a/src/server/connection.rs
+++ b/src/server/connection.rs
@@ -635,6 +635,16 @@ impl Connection {
             pi.hostname = MOBILE_INFO2.lock().unwrap().clone();
             pi.platform = "Android".into();
         }
+        #[cfg(feature = "hwcodec")]
+        {
+            let (h264, h265) = scrap::codec::Encoder::supported_encoding();
+            pi.encoding = Some(SupportedEncoding {
+                h264,
+                h265,
+                ..Default::default()
+            })
+            .into();
+        }
 
         if self.port_forward_socket.is_some() {
             let mut msg_out = Message::new();
@@ -1351,6 +1361,12 @@ impl Connection {
                 }
             }
         }
+        if let Some(q) = o.video_codec_state.clone().take() {
+            scrap::codec::Encoder::update_video_encoder(
+                self.inner.id(),
+                scrap::codec::EncoderUpdate::State(q),
+            );
+        }
     }
 
     async fn on_close(&mut self, reason: &str, lock: bool) {
diff --git a/src/server/video_service.rs b/src/server/video_service.rs
index e6ea713a1..e639fbe24 100644
--- a/src/server/video_service.rs
+++ b/src/server/video_service.rs
@@ -483,6 +483,7 @@ fn run(sp: GenericService) -> ResultType<()> {
     let mut try_gdi = 1;
     #[cfg(windows)]
     log::info!("gdi: {}", c.is_gdi());
+    let codec_name = Encoder::current_hw_encoder_name();
 
     while sp.ok() {
         #[cfg(windows)]
@@ -508,6 +509,9 @@ fn run(sp: GenericService) -> ResultType<()> {
             *SWITCH.lock().unwrap() = true;
             bail!("SWITCH");
         }
+        if codec_name != Encoder::current_hw_encoder_name() {
+            bail!("SWITCH");
+        }
         check_privacy_mode_changed(&sp, c.privacy_mode_id)?;
         #[cfg(windows)]
         {
diff --git a/src/ui/header.css b/src/ui/header.css
index fb7b57fda..e248b46d5 100644
--- a/src/ui/header.css
+++ b/src/ui/header.css
@@ -94,3 +94,4 @@ span#fullscreen.active {
 button:disabled {
   opacity: 0.3;
 }
+
diff --git a/src/ui/header.tis b/src/ui/header.tis
index 35a132c90..6ee3cad01 100644
--- a/src/ui/header.tis
+++ b/src/ui/header.tis
@@ -145,6 +145,9 @@ class Header: Reactor.Component {
     }
 
     function renderDisplayPop() {
+        var codecs = handler.supported_hwcodec();
+        var show_codec = handler.has_hwcodec() && (codecs[0] || codecs[1]);
+
         return <popup>
             <menu.context #display-options>
                 <li #adjust-window style="display:none">{translate('Adjust Window')}</li> 
@@ -157,6 +160,13 @@ class Header: Reactor.Component {
                 <li #balanced type="image-quality"><span>{svg_checkmark}</span>{translate('Balanced')}</li> 
                 <li #low type="image-quality"><span>{svg_checkmark}</span>{translate('Optimize reaction time')}</li> 
                 <li #custom type="image-quality"><span>{svg_checkmark}</span>{translate('Custom')}</li>
+                {show_codec ? <div>
+                <div .separator />
+                <li #auto type="codec-preference"><span>{svg_checkmark}</span>Auto</li>
+                <li #vp9 type="codec-preference"><span>{svg_checkmark}</span>VP9</li>
+                {codecs[0] ? <li #h264 type="codec-preference"><span>{svg_checkmark}</span>H264</li> : ""}
+                {codecs[1] ? <li #h265 type="codec-preference"><span>{svg_checkmark}</span>H265</li> : ""}
+                </div> : ""}
                 <div .separator />
                 <li #show-remote-cursor .toggle-option><span>{svg_checkmark}</span>{translate('Show remote cursor')}</li> 
                 <li #show-quality-monitor .toggle-option><span>{svg_checkmark}</span>{translate('Show quality monitor')}</li> 
@@ -311,7 +321,7 @@ class Header: Reactor.Component {
         }
     }
 
-    event click $(menu#display-options>li) (_, me) {
+    event click $(menu#display-options li) (_, me) {
         if (me.id == "custom") {
             handle_custom_image_quality();
         } else if (me.id == "privacy-mode") {
@@ -328,6 +338,9 @@ class Header: Reactor.Component {
             } else if (type == "view-style") {
                 handler.save_view_style(me.id);
                 adaptDisplay();
+            } else if (type == "codec-preference") {
+                handler.set_option("codec-preference", me.id);
+                handler.change_prefer_codec();
             }
             toggleMenuState();
         }
@@ -355,7 +368,10 @@ function toggleMenuState() {
     var s = handler.get_view_style();
     if (!s) s = "original";
     values.push(s);
-    for (var el in $$(menu#display-options>li)) {
+    var c = handler.get_option("codec-preference");
+    if (!c) c = "auto";
+    values.push(c);
+    for (var el in $$(menu#display-options li)) {
         el.attributes.toggleClass("selected", values.indexOf(el.id) >= 0);
     }
     for (var id in ["show-remote-cursor", "show-quality-monitor", "disable-audio", "enable-file-transfer", "disable-clipboard", "lock-after-session-end"]) {
diff --git a/src/ui/remote.rs b/src/ui/remote.rs
index 4d941e1f8..a738d7f8b 100644
--- a/src/ui/remote.rs
+++ b/src/ui/remote.rs
@@ -231,6 +231,9 @@ impl sciter::EventHandler for Handler {
         fn get_remember();
         fn peer_platform();
         fn set_write_override(i32, i32, bool, bool, bool);
+        fn has_hwcodec();
+        fn supported_hwcodec();
+        fn change_prefer_codec();
     }
 }
 
@@ -595,6 +598,42 @@ impl Handler {
         true
     }
 
+    fn has_hwcodec(&self) -> bool {
+        #[cfg(not(feature = "hwcodec"))]
+        return false;
+        #[cfg(feature = "hwcodec")]
+        return true;
+    }
+
+    fn supported_hwcodec(&self) -> Value {
+        #[cfg(feature = "hwcodec")]
+        {
+            let mut v = Value::array(0);
+            let decoder = scrap::codec::Decoder::video_codec_state(&self.id);
+            let mut h264 = decoder.score_h264 > 0;
+            let mut h265 = decoder.score_h265 > 0;
+            if let Some((encoding_264, encoding_265)) = self.lc.read().unwrap().supported_encoding {
+                h264 = h264 && encoding_264;
+                h265 = h265 && encoding_265;
+            }
+            v.push(h264);
+            v.push(h265);
+            v
+        }
+        #[cfg(not(feature = "hwcodec"))]
+        {
+            let mut v = Value::array(0);
+            v.push(false);
+            v.push(false);
+            v
+        }
+    }
+
+    fn change_prefer_codec(&self) {
+        let msg = self.lc.write().unwrap().change_prefer_codec();
+        self.send(Data::Message(msg));
+    }
+
     fn t(&self, name: String) -> String {
         crate::client::translate(name)
     }