diff --git a/Cargo.lock b/Cargo.lock
index aa18fb9ce..b48763554 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3037,8 +3037,8 @@ checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
 
 [[package]]
 name = "hwcodec"
-version = "0.4.9"
-source = "git+https://github.com/21pages/hwcodec#7a52282267cb6aadbcd74c132bd4ecd43ab6f505"
+version = "0.4.10"
+source = "git+https://github.com/21pages/hwcodec#9cb895fdaea198dd72bd75980109dbd05a059a60"
 dependencies = [
  "bindgen 0.59.2",
  "cc",
diff --git a/flutter/android/app/src/main/kotlin/com/carriez/flutter_hbb/MainActivity.kt b/flutter/android/app/src/main/kotlin/com/carriez/flutter_hbb/MainActivity.kt
index 52a5ff75e..ab51b20d1 100644
--- a/flutter/android/app/src/main/kotlin/com/carriez/flutter_hbb/MainActivity.kt
+++ b/flutter/android/app/src/main/kotlin/com/carriez/flutter_hbb/MainActivity.kt
@@ -7,6 +7,8 @@ package com.carriez.flutter_hbb
  * Inspired by [droidVNC-NG] https://github.com/bk138/droidVNC-NG
  */
 
+import ffi.FFI
+
 import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
@@ -15,10 +17,20 @@ import android.os.Build
 import android.os.IBinder
 import android.util.Log
 import android.view.WindowManager
+import android.media.MediaCodecInfo
+import android.media.MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface
+import android.media.MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar
+import android.media.MediaCodecList
+import android.media.MediaFormat
+import android.util.DisplayMetrics
+import androidx.annotation.RequiresApi
+import org.json.JSONArray
+import org.json.JSONObject
 import com.hjq.permissions.XXPermissions
 import io.flutter.embedding.android.FlutterActivity
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugin.common.MethodChannel
+import kotlin.concurrent.thread
 
 
 class MainActivity : FlutterActivity() {
@@ -42,6 +54,7 @@ class MainActivity : FlutterActivity() {
             channelTag
         )
         initFlutterChannel(flutterMethodChannel!!)
+        thread { setCodecInfo() }
     }
 
     override fun onResume() {
@@ -223,4 +236,80 @@ class MainActivity : FlutterActivity() {
             }
         }
     }
+
+    private fun setCodecInfo() {
+        val codecList = MediaCodecList(MediaCodecList.REGULAR_CODECS)
+        val codecs = codecList.codecInfos
+        val codecArray = JSONArray()
+
+        val windowManager = getSystemService(Context.WINDOW_SERVICE) as WindowManager
+        var w = 0
+        var h = 0
+        @Suppress("DEPRECATION")
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            val m = windowManager.maximumWindowMetrics
+            w = m.bounds.width()
+            h = m.bounds.height()
+        } else {
+            val dm = DisplayMetrics()
+            windowManager.defaultDisplay.getRealMetrics(dm)
+            w = dm.widthPixels
+            h = dm.heightPixels
+        }
+        codecs.forEach { codec ->
+            val codecObject = JSONObject()
+            codecObject.put("name", codec.name)
+            codecObject.put("is_encoder", codec.isEncoder)
+            var hw: Boolean? = null;
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+                hw = codec.isHardwareAccelerated
+            } else {
+                if (listOf("OMX.google.", "OMX.SEC.", "c2.android").any { codec.name.startsWith(it) }) {
+                    hw = false
+                }
+            }
+            codecObject.put("hw", hw)
+            var mime_type = ""
+            codec.supportedTypes.forEach { type ->
+                if (listOf("video/avc", "video/hevc", "video/x-vnd.on2.vp8", "video/x-vnd.on2.vp9", "video/av01").contains(type)) {
+                    mime_type = type;
+                }
+            }
+            if (mime_type.isNotEmpty()) {
+                codecObject.put("mime_type", mime_type)
+                val caps = codec.getCapabilitiesForType(mime_type)
+                var usable = true;
+                if (codec.isEncoder) {
+                    if (!caps.videoCapabilities.isSizeSupported(w,h) || !caps.videoCapabilities.isSizeSupported(h,w)) {
+                        usable = false
+                    }
+                }
+                codecObject.put("min_width", caps.videoCapabilities.supportedWidths.lower)
+                codecObject.put("max_width", caps.videoCapabilities.supportedWidths.upper)
+                codecObject.put("min_height", caps.videoCapabilities.supportedHeights.lower)
+                codecObject.put("max_height", caps.videoCapabilities.supportedHeights.upper)
+                val surface = caps.colorFormats.contains(COLOR_FormatSurface);
+                codecObject.put("surface", surface)
+                val nv12 = caps.colorFormats.contains(COLOR_FormatYUV420SemiPlanar)
+                codecObject.put("nv12", nv12)
+                if (!(nv12 || surface)) {
+                    usable = false
+                }
+                codecObject.put("min_bitrate", caps.videoCapabilities.bitrateRange.lower / 1000)
+                codecObject.put("max_bitrate", caps.videoCapabilities.bitrateRange.upper / 1000)
+                if (!codec.isEncoder) {
+                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+                        codecObject.put("low_latency", caps.isFeatureSupported(MediaCodecInfo.CodecCapabilities.FEATURE_LowLatency))
+                    }
+                }
+                if (usable) {
+                    codecArray.put(codecObject)
+                }
+            }
+        }
+        val result = JSONObject()
+        result.put("version", Build.VERSION.SDK_INT)
+        result.put("codecs", codecArray)
+        FFI.setCodecInfo(result.toString())
+    }
 }
diff --git a/flutter/android/app/src/main/kotlin/ffi.kt b/flutter/android/app/src/main/kotlin/ffi.kt
index ba29021b3..aa26b36a6 100644
--- a/flutter/android/app/src/main/kotlin/ffi.kt
+++ b/flutter/android/app/src/main/kotlin/ffi.kt
@@ -18,4 +18,5 @@ object FFI {
     external fun translateLocale(localeName: String, input: String): String
     external fun refreshScreen()
     external fun setFrameRawEnable(name: String, value: Boolean)
+    external fun setCodecInfo(info: String)
 }
\ No newline at end of file
diff --git a/flutter/lib/mobile/pages/settings_page.dart b/flutter/lib/mobile/pages/settings_page.dart
index fff7e3516..48c150a40 100644
--- a/flutter/lib/mobile/pages/settings_page.dart
+++ b/flutter/lib/mobile/pages/settings_page.dart
@@ -44,6 +44,7 @@ class _SettingsState extends State<SettingsPage> with WidgetsBindingObserver {
   var _onlyWhiteList = false;
   var _enableDirectIPAccess = false;
   var _enableRecordSession = false;
+  var _enableHardwareCodec = false;
   var _autoRecordIncomingSession = false;
   var _allowAutoDisconnect = false;
   var _localIP = "";
@@ -120,6 +121,13 @@ class _SettingsState extends State<SettingsPage> with WidgetsBindingObserver {
         _enableRecordSession = enableRecordSession;
       }
 
+      final enableHardwareCodec = option2bool(
+          'enable-hwcodec', await bind.mainGetOption(key: 'enable-hwcodec'));
+      if (_enableHardwareCodec != enableHardwareCodec) {
+        update = true;
+        _enableHardwareCodec = enableHardwareCodec;
+      }
+
       final autoRecordIncomingSession = option2bool(
           'allow-auto-record-incoming',
           await bind.mainGetOption(key: 'allow-auto-record-incoming'));
@@ -513,6 +521,22 @@ class _SettingsState extends State<SettingsPage> with WidgetsBindingObserver {
             },
           )
         ]),
+        if (isAndroid)
+          SettingsSection(title: Text(translate('Hardware Codec')), tiles: [
+            SettingsTile.switchTile(
+              title: Text(translate('Enable hardware codec')),
+              initialValue: _enableHardwareCodec,
+              onToggle: (v) async {
+                await bind.mainSetOption(
+                    key: "enable-hwcodec", value: v ? "" : "N");
+                final newValue =
+                    await bind.mainGetOption(key: "enable-hwcodec") != "N";
+                setState(() {
+                  _enableHardwareCodec = newValue;
+                });
+              },
+            ),
+          ]),
         if (isAndroid && !outgoingOnly)
           SettingsSection(
             title: Text(translate("Recording")),
diff --git a/libs/scrap/examples/benchmark.rs b/libs/scrap/examples/benchmark.rs
index eb74bfad4..3ef7916a9 100644
--- a/libs/scrap/examples/benchmark.rs
+++ b/libs/scrap/examples/benchmark.rs
@@ -272,6 +272,7 @@ mod hw {
         let mut encoder = HwRamEncoder::new(
             EncoderCfg::HWRAM(HwRamEncoderConfig {
                 name: info.name.clone(),
+                mc_name: None,
                 width,
                 height,
                 quality,
diff --git a/libs/scrap/src/android/ffi.rs b/libs/scrap/src/android/ffi.rs
index 7079cb3b9..a604166a7 100644
--- a/libs/scrap/src/android/ffi.rs
+++ b/libs/scrap/src/android/ffi.rs
@@ -10,6 +10,7 @@ use jni::{
 
 use jni::errors::{Error as JniError, Result as JniResult};
 use lazy_static::lazy_static;
+use serde::Deserialize;
 use std::ops::Not;
 use std::sync::atomic::{AtomicPtr, Ordering::SeqCst};
 use std::sync::{Mutex, RwLock};
@@ -20,6 +21,7 @@ lazy_static! {
     static ref VIDEO_RAW: Mutex<FrameRaw> = Mutex::new(FrameRaw::new("video", MAX_VIDEO_FRAME_TIMEOUT));
     static ref AUDIO_RAW: Mutex<FrameRaw> = Mutex::new(FrameRaw::new("audio", MAX_AUDIO_FRAME_TIMEOUT));
     static ref NDK_CONTEXT_INITED: Mutex<bool> = Default::default();
+    static ref MEDIA_CODEC_INFOS: RwLock<Option<MediaCodecInfos>> = RwLock::new(None);
 }
 
 const MAX_VIDEO_FRAME_TIMEOUT: Duration = Duration::from_millis(100);
@@ -154,6 +156,50 @@ pub extern "system" fn Java_ffi_FFI_init(env: JNIEnv, _class: JClass, ctx: JObje
     }
 }
 
+#[derive(Debug, Deserialize, Clone)]
+pub struct MediaCodecInfo {
+    pub name: String,
+    pub is_encoder: bool,
+    #[serde(default)]
+    pub hw: Option<bool>, // api 29+
+    pub mime_type: String,
+    pub surface: bool,
+    pub nv12: bool,
+    #[serde(default)]
+    pub low_latency: Option<bool>, // api 30+, decoder
+    pub min_bitrate: u32,
+    pub max_bitrate: u32,
+    pub min_width: usize,
+    pub max_width: usize,
+    pub min_height: usize,
+    pub max_height: usize,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+pub struct MediaCodecInfos {
+    pub version: usize,
+    pub codecs: Vec<MediaCodecInfo>,
+}
+
+#[no_mangle]
+pub extern "system" fn Java_ffi_FFI_setCodecInfo(env: JNIEnv, _class: JClass, info: JString) {
+    let mut env = env;
+    if let Ok(info) = env.get_string(&info) {
+        let info: String = info.into();
+        if let Ok(infos) = serde_json::from_str::<MediaCodecInfos>(&info) {
+            *MEDIA_CODEC_INFOS.write().unwrap() = Some(infos);
+        }
+    }
+}
+
+pub fn get_codec_info() -> Option<MediaCodecInfos> {
+    MEDIA_CODEC_INFOS.read().unwrap().as_ref().cloned()
+}
+
+pub fn clear_codec_info() {
+    *MEDIA_CODEC_INFOS.write().unwrap() = None;
+}
+
 pub fn call_main_service_pointer_input(kind: &str, mask: i32, x: i32, y: i32) -> JniResult<()> {
     if let (Some(jvm), Some(ctx)) = (
         JVM.read().unwrap().as_ref(),
diff --git a/libs/scrap/src/common/aom.rs b/libs/scrap/src/common/aom.rs
index 759bf3fbe..7d16eeafd 100644
--- a/libs/scrap/src/common/aom.rs
+++ b/libs/scrap/src/common/aom.rs
@@ -296,6 +296,14 @@ impl EncoderApi for AomEncoder {
     fn support_abr(&self) -> bool {
         true
     }
+
+    fn support_changing_quality(&self) -> bool {
+        true
+    }
+
+    fn latency_free(&self) -> bool {
+        true
+    }
 }
 
 impl AomEncoder {
diff --git a/libs/scrap/src/common/codec.rs b/libs/scrap/src/common/codec.rs
index b189dadac..5a04cfacc 100644
--- a/libs/scrap/src/common/codec.rs
+++ b/libs/scrap/src/common/codec.rs
@@ -70,6 +70,10 @@ pub trait EncoderApi {
     fn bitrate(&self) -> u32;
 
     fn support_abr(&self) -> bool;
+
+    fn support_changing_quality(&self) -> bool;
+
+    fn latency_free(&self) -> bool;
 }
 
 pub struct Encoder {
@@ -138,6 +142,9 @@ impl Encoder {
                 }),
                 Err(e) => {
                     log::error!("new hw encoder failed: {e:?}, clear config");
+                    #[cfg(target_os = "android")]
+                    crate::android::ffi::clear_codec_info();
+                    #[cfg(not(target_os = "android"))]
                     hbb_common::config::HwCodecConfig::clear_ram();
                     Self::update(EncodingUpdate::Check);
                     *ENCODE_CODEC_FORMAT.lock().unwrap() = CodecFormat::VP9;
@@ -346,7 +353,14 @@ impl Encoder {
             EncoderCfg::AOM(_) => CodecFormat::AV1,
             #[cfg(feature = "hwcodec")]
             EncoderCfg::HWRAM(hw) => {
-                if hw.name.to_lowercase().contains("h264") {
+                let name = hw.name.to_lowercase();
+                if name.contains("vp8") {
+                    CodecFormat::VP8
+                } else if name.contains("vp9") {
+                    CodecFormat::VP9
+                } else if name.contains("av1") {
+                    CodecFormat::AV1
+                } else if name.contains("h264") {
                     CodecFormat::H264
                 } else {
                     CodecFormat::H265
@@ -817,7 +831,7 @@ impl Decoder {
 
 #[cfg(any(feature = "hwcodec", feature = "mediacodec"))]
 pub fn enable_hwcodec_option() -> bool {
-    if cfg!(windows) || cfg!(target_os = "linux") || cfg!(feature = "mediacodec") {
+    if cfg!(windows) || cfg!(target_os = "linux") || cfg!(target_os = "android") {
         if let Some(v) = Config2::get().options.get("enable-hwcodec") {
             return v != "N";
         }
@@ -847,6 +861,15 @@ impl Default for Quality {
     }
 }
 
+impl Quality {
+    pub fn is_custom(&self) -> bool {
+        match self {
+            Quality::Custom(_) => true,
+            _ => false,
+        }
+    }
+}
+
 pub fn base_bitrate(width: u32, height: u32) -> u32 {
     #[allow(unused_mut)]
     let mut base_bitrate = ((width * height) / 1000) as u32; // same as 1.1.9
diff --git a/libs/scrap/src/common/hwcodec.rs b/libs/scrap/src/common/hwcodec.rs
index 9c03937b5..a1dbeae18 100644
--- a/libs/scrap/src/common/hwcodec.rs
+++ b/libs/scrap/src/common/hwcodec.rs
@@ -29,11 +29,15 @@ const DEFAULT_PIXFMT: AVPixelFormat = AVPixelFormat::AV_PIX_FMT_NV12;
 pub const DEFAULT_TIME_BASE: [i32; 2] = [1, 30];
 const DEFAULT_GOP: i32 = i32::MAX;
 const DEFAULT_HW_QUALITY: Quality = Quality_Default;
-const DEFAULT_RC: RateControl = RC_DEFAULT;
+#[cfg(target_os = "android")]
+const DEFAULT_RC: RateControl = RC_VBR; // android cbr poor quality
+#[cfg(not(target_os = "android"))]
+const DEFAULT_RC: RateControl = RC_CBR;
 
 #[derive(Debug, Clone)]
 pub struct HwRamEncoderConfig {
     pub name: String,
+    pub mc_name: Option<String>,
     pub width: usize,
     pub height: usize,
     pub quality: Q,
@@ -57,20 +61,22 @@ impl EncoderApi for HwRamEncoder {
     {
         match cfg {
             EncoderCfg::HWRAM(config) => {
-                let b = Self::convert_quality(config.quality);
+                let b = Self::convert_quality(&config.name, config.quality);
                 let base_bitrate = base_bitrate(config.width as _, config.height as _);
                 let mut bitrate = base_bitrate * b / 100;
                 if base_bitrate <= 0 {
                     bitrate = base_bitrate;
                 }
+                bitrate = Self::check_bitrate_range(&config.name, bitrate);
                 let gop = config.keyframe_interval.unwrap_or(DEFAULT_GOP as _) as i32;
                 let ctx = EncodeContext {
                     name: config.name.clone(),
+                    mc_name: config.mc_name.clone(),
                     width: config.width as _,
                     height: config.height as _,
                     pixfmt: DEFAULT_PIXFMT,
                     align: HW_STRIDE_ALIGN as _,
-                    bitrate: bitrate as i32 * 1000,
+                    kbs: bitrate as i32,
                     timebase: DEFAULT_TIME_BASE,
                     gop,
                     quality: DEFAULT_HW_QUALITY,
@@ -166,10 +172,11 @@ impl EncoderApi for HwRamEncoder {
     }
 
     fn set_quality(&mut self, quality: crate::codec::Quality) -> ResultType<()> {
-        let b = Self::convert_quality(quality);
-        let bitrate = base_bitrate(self.width as _, self.height as _) * b / 100;
+        let b = Self::convert_quality(&self.name, quality);
+        let mut bitrate = base_bitrate(self.width as _, self.height as _) * b / 100;
         if bitrate > 0 {
-            self.encoder.set_bitrate((bitrate * 1000) as _).ok();
+            bitrate = Self::check_bitrate_range(&self.name, bitrate);
+            self.encoder.set_bitrate(bitrate as _).ok();
             self.bitrate = bitrate;
         }
         Ok(())
@@ -180,7 +187,19 @@ impl EncoderApi for HwRamEncoder {
     }
 
     fn support_abr(&self) -> bool {
-        ["qsv", "vaapi"].iter().all(|&x| !self.name.contains(x))
+        ["qsv", "vaapi", "mediacodec"]
+            .iter()
+            .all(|&x| !self.name.contains(x))
+    }
+
+    fn support_changing_quality(&self) -> bool {
+        ["vaapi", "mediacodec"]
+            .iter()
+            .all(|&x| !self.name.contains(x))
+    }
+
+    fn latency_free(&self) -> bool {
+        !self.name.contains("mediacodec")
     }
 }
 
@@ -217,14 +236,42 @@ impl HwRamEncoder {
         }
     }
 
-    pub fn convert_quality(quality: crate::codec::Quality) -> u32 {
+    pub fn convert_quality(name: &str, quality: crate::codec::Quality) -> u32 {
         use crate::codec::Quality;
-        match quality {
+        let quality = match quality {
             Quality::Best => 150,
             Quality::Balanced => 100,
             Quality::Low => 50,
             Quality::Custom(b) => b,
+        };
+        let factor = if name.contains("mediacodec") {
+            if name.contains("h264") {
+                6
+            } else {
+                3
+            }
+        } else {
+            1
+        };
+        quality * factor
+    }
+
+    pub fn check_bitrate_range(name: &str, bitrate: u32) -> u32 {
+        #[cfg(target_os = "android")]
+        if name.contains("mediacodec") {
+            let info = crate::android::ffi::get_codec_info();
+            if let Some(info) = info {
+                if let Some(codec) = info.codecs.iter().find(|c| c.name == name && c.is_encoder) {
+                    if bitrate > codec.max_bitrate {
+                        return codec.max_bitrate;
+                    }
+                    if bitrate < codec.min_bitrate {
+                        return codec.min_bitrate;
+                    }
+                }
+            }
         }
+        bitrate
     }
 }
 
@@ -285,7 +332,10 @@ impl HwRamDecoder {
         match Decoder::new(ctx) {
             Ok(decoder) => Ok(HwRamDecoder { decoder, info }),
             Err(_) => {
-                HwCodecConfig::clear_ram();
+                #[cfg(target_os = "android")]
+                crate::android::ffi::clear_codec_info();
+                #[cfg(not(target_os = "android"))]
+                hbb_common::config::HwCodecConfig::clear_ram();
                 Err(anyhow!(format!("Failed to create decoder")))
             }
         }
@@ -363,20 +413,87 @@ struct Available {
 }
 
 fn get_config() -> ResultType<Available> {
-    match serde_json::from_str(&HwCodecConfig::load().ram) {
-        Ok(v) => Ok(v),
-        Err(e) => Err(anyhow!("Failed to get config:{e:?}")),
+    #[cfg(target_os = "android")]
+    {
+        let info = crate::android::ffi::get_codec_info();
+        struct T {
+            name_prefix: &'static str,
+            data_format: DataFormat,
+        }
+        let ts = vec![
+            T {
+                name_prefix: "h264",
+                data_format: DataFormat::H264,
+            },
+            T {
+                name_prefix: "hevc",
+                data_format: DataFormat::H265,
+            },
+        ];
+        let mut e = vec![];
+        if let Some(info) = info {
+            ts.iter().for_each(|t| {
+                let codecs: Vec<_> = info
+                    .codecs
+                    .iter()
+                    .filter(|c| {
+                        c.is_encoder
+                            && c.mime_type.as_str() == get_mime_type(t.data_format)
+                            && c.nv12
+                    })
+                    .collect();
+                log::debug!("available {:?} encoders: {codecs:?}", t.data_format);
+                let mut best = None;
+                if let Some(c) = codecs.iter().find(|c| c.hw == Some(true)) {
+                    best = Some(c.name.clone());
+                } else if let Some(c) = codecs.iter().find(|c| c.hw == None) {
+                    best = Some(c.name.clone());
+                } else if let Some(c) = codecs.first() {
+                    best = Some(c.name.clone());
+                }
+                if let Some(best) = best {
+                    e.push(CodecInfo {
+                        name: format!("{}_mediacodec", t.name_prefix),
+                        mc_name: Some(best),
+                        format: t.data_format,
+                        hwdevice: hwcodec::ffmpeg::AVHWDeviceType::AV_HWDEVICE_TYPE_NONE,
+                        priority: 0,
+                    });
+                }
+            });
+        }
+        log::debug!("e: {e:?}");
+        Ok(Available { e, d: vec![] })
+    }
+    #[cfg(not(target_os = "android"))]
+    {
+        match serde_json::from_str(&HwCodecConfig::load().ram) {
+            Ok(v) => Ok(v),
+            Err(e) => Err(anyhow!("Failed to get config:{e:?}")),
+        }
+    }
+}
+
+#[cfg(target_os = "android")]
+fn get_mime_type(codec: DataFormat) -> &'static str {
+    match codec {
+        DataFormat::VP8 => "video/x-vnd.on2.vp8",
+        DataFormat::VP9 => "video/x-vnd.on2.vp9",
+        DataFormat::AV1 => "video/av01",
+        DataFormat::H264 => "video/avc",
+        DataFormat::H265 => "video/hevc",
     }
 }
 
 pub fn check_available_hwcodec() {
     let ctx = EncodeContext {
         name: String::from(""),
+        mc_name: None,
         width: 1280,
         height: 720,
         pixfmt: DEFAULT_PIXFMT,
         align: HW_STRIDE_ALIGN as _,
-        bitrate: 0,
+        kbs: 0,
         timebase: DEFAULT_TIME_BASE,
         gop: DEFAULT_GOP,
         quality: DEFAULT_HW_QUALITY,
diff --git a/libs/scrap/src/common/vpxcodec.rs b/libs/scrap/src/common/vpxcodec.rs
index a3e7e99e6..91507f053 100644
--- a/libs/scrap/src/common/vpxcodec.rs
+++ b/libs/scrap/src/common/vpxcodec.rs
@@ -235,6 +235,13 @@ impl EncoderApi for VpxEncoder {
     fn support_abr(&self) -> bool {
         true
     }
+    fn support_changing_quality(&self) -> bool {
+        true
+    }
+
+    fn latency_free(&self) -> bool {
+        true
+    }
 }
 
 impl VpxEncoder {
diff --git a/libs/scrap/src/common/vram.rs b/libs/scrap/src/common/vram.rs
index 3b4113fd1..f85f15ed8 100644
--- a/libs/scrap/src/common/vram.rs
+++ b/libs/scrap/src/common/vram.rs
@@ -180,6 +180,14 @@ impl EncoderApi for VRamEncoder {
     fn support_abr(&self) -> bool {
         self.config.device.vendor_id != ADAPTER_VENDOR_INTEL as u32
     }
+
+    fn support_changing_quality(&self) -> bool {
+        true
+    }
+
+    fn latency_free(&self) -> bool {
+        true
+    }
 }
 
 impl VRamEncoder {
diff --git a/src/server/video_qos.rs b/src/server/video_qos.rs
index 3e7ca8fc6..5d3aeca85 100644
--- a/src/server/video_qos.rs
+++ b/src/server/video_qos.rs
@@ -124,6 +124,10 @@ impl VideoQoS {
         self.support_abr.insert(display_idx, support);
     }
 
+    pub fn in_vbr_state(&self) -> bool {
+        Config::get_option("enable-abr") != "N" && self.support_abr.iter().all(|e| *e.1)
+    }
+
     pub fn refresh(&mut self, typ: Option<RefreshType>) {
         // fps
         let user_fps = |u: &UserData| {
@@ -178,8 +182,7 @@ impl VideoQoS {
         let mut quality = latest_quality;
 
         // network delay
-        let abr_enabled =
-            Config::get_option("enable-abr") != "N" && self.support_abr.iter().all(|e| *e.1);
+        let abr_enabled = self.in_vbr_state();
         if abr_enabled && typ != Some(RefreshType::SetImageQuality) {
             // max delay
             let delay = self
diff --git a/src/server/video_service.rs b/src/server/video_service.rs
index 53f9b1b21..902b5d147 100644
--- a/src/server/video_service.rs
+++ b/src/server/video_service.rs
@@ -53,7 +53,7 @@ use scrap::{
     codec::{Encoder, EncoderCfg, Quality},
     record::{Recorder, RecorderContext},
     vpxcodec::{VpxEncoderConfig, VpxVideoCodecId},
-    CodecFormat, Display, Frame, TraitCapturer,
+    CodecFormat, Display, EncodeInput, Frame, TraitCapturer,
 };
 #[cfg(windows)]
 use std::sync::Once;
@@ -470,6 +470,8 @@ fn run(vs: VideoService) -> ResultType<()> {
     let mut would_block_count = 0u32;
     let mut yuv = Vec::new();
     let mut mid_data = Vec::new();
+    let mut repeat_encode_counter = 0;
+    let repeat_encode_max = 10;
 
     while sp.ok() {
         #[cfg(windows)]
@@ -480,8 +482,15 @@ fn run(vs: VideoService) -> ResultType<()> {
         if quality != video_qos.quality() {
             log::debug!("quality: {:?} -> {:?}", quality, video_qos.quality());
             quality = video_qos.quality();
-            allow_err!(encoder.set_quality(quality));
-            video_qos.store_bitrate(encoder.bitrate());
+            if encoder.support_changing_quality() {
+                allow_err!(encoder.set_quality(quality));
+                video_qos.store_bitrate(encoder.bitrate());
+            } else {
+                if !video_qos.in_vbr_state() && !quality.is_custom() {
+                    log::info!("switch to change quality");
+                    bail!("SWITCH");
+                }
+            }
         }
         if client_record != video_qos.record() {
             bail!("SWITCH");
@@ -526,17 +535,17 @@ fn run(vs: VideoService) -> ResultType<()> {
 
         frame_controller.reset();
 
+        let time = now - start;
+        let ms = (time.as_secs() * 1000 + time.subsec_millis() as u64) as i64;
         let res = match c.frame(spf) {
             Ok(frame) => {
-                let time = now - start;
-                let ms = (time.as_secs() * 1000 + time.subsec_millis() as u64) as i64;
+                repeat_encode_counter = 0;
                 if frame.valid() {
+                    let frame = frame.to(encoder.yuvfmt(), &mut yuv, &mut mid_data)?;
                     let send_conn_ids = handle_one_frame(
                         display_idx,
                         &sp,
                         frame,
-                        &mut yuv,
-                        &mut mid_data,
                         ms,
                         &mut encoder,
                         recorder.clone(),
@@ -579,6 +588,21 @@ fn run(vs: VideoService) -> ResultType<()> {
                         }
                     }
                 }
+                if !encoder.latency_free() && yuv.len() > 0 {
+                    // yun.len() > 0 means the frame is not texture.
+                    if repeat_encode_counter < repeat_encode_max {
+                        repeat_encode_counter += 1;
+                        let send_conn_ids = handle_one_frame(
+                            display_idx,
+                            &sp,
+                            EncodeInput::YUV(&yuv),
+                            ms,
+                            &mut encoder,
+                            recorder.clone(),
+                        )?;
+                        frame_controller.set_send(now, send_conn_ids);
+                    }
+                }
             }
             Err(err) => {
                 // Get display information again immediately after error.
@@ -707,6 +731,7 @@ fn get_encoder_config(
             if let Some(hw) = HwRamEncoder::try_get(negotiated_codec) {
                 return EncoderCfg::HWRAM(HwRamEncoderConfig {
                     name: hw.name,
+                    mc_name: hw.mc_name,
                     width: c.width,
                     height: c.height,
                     quality,
@@ -805,9 +830,7 @@ fn check_privacy_mode_changed(sp: &GenericService, privacy_mode_id: i32) -> Resu
 fn handle_one_frame(
     display: usize,
     sp: &GenericService,
-    frame: Frame,
-    yuv: &mut Vec<u8>,
-    mid_data: &mut Vec<u8>,
+    frame: EncodeInput,
     ms: i64,
     encoder: &mut Encoder,
     recorder: Arc<Mutex<Option<Recorder>>>,
@@ -820,7 +843,6 @@ fn handle_one_frame(
         Ok(())
     })?;
 
-    let frame = frame.to(encoder.yuvfmt(), yuv, mid_data)?;
     let mut send_conn_ids: HashSet<i32> = Default::default();
     match encoder.encode_to_message(frame, ms) {
         Ok(mut vf) => {