diff --git a/libs/scrap/src/common/codec.rs b/libs/scrap/src/common/codec.rs
index 81ed5824a..0f5b5dad3 100644
--- a/libs/scrap/src/common/codec.rs
+++ b/libs/scrap/src/common/codec.rs
@@ -287,6 +287,7 @@ impl Decoder {
         }
     }
 
+    // rgb [in/out] fmt and stride must be set in ImageRgb
     pub fn handle_video_frame(
         &mut self,
         frame: &video_frame::Union,
@@ -335,6 +336,7 @@ impl Decoder {
         }
     }
 
+    // rgb [in/out] fmt and stride must be set in ImageRgb
     fn handle_vpxs_video_frame(
         decoder: &mut VpxDecoder,
         vpxs: &EncodedVideoFrames,
@@ -359,6 +361,7 @@ impl Decoder {
         }
     }
 
+    // rgb [in/out] fmt and stride must be set in ImageRgb
     #[cfg(feature = "hwcodec")]
     fn handle_hw_video_frame(
         decoder: &mut HwDecoder,
@@ -378,6 +381,7 @@ impl Decoder {
         return Ok(ret);
     }
 
+    // rgb [in/out] fmt and stride must be set in ImageRgb
     #[cfg(feature = "mediacodec")]
     fn handle_mediacodec_video_frame(
         decoder: &mut MediaCodecDecoder,
diff --git a/libs/scrap/src/common/hwcodec.rs b/libs/scrap/src/common/hwcodec.rs
index efd250bc1..3ee91ca8b 100644
--- a/libs/scrap/src/common/hwcodec.rs
+++ b/libs/scrap/src/common/hwcodec.rs
@@ -227,15 +227,16 @@ pub struct HwDecoderImage<'a> {
 }
 
 impl HwDecoderImage<'_> {
+    // rgb [in/out] fmt and stride must be set in ImageRgb
     pub fn to_fmt(&self, rgb: &mut ImageRgb, i420: &mut Vec<u8>) -> ResultType<()> {
         let frame = self.frame;
         rgb.w = frame.width as _;
         rgb.h = frame.height as _;
         // take dst_stride into account when you convert
-        let dst_stride = rgb.stride;
+        let dst_stride = rgb.stride();
         match frame.pixfmt {
             AVPixelFormat::AV_PIX_FMT_NV12 => hw::hw_nv12_to(
-                rgb.fmt,
+                rgb.fmt(),
                 frame.width as _,
                 frame.height as _,
                 &frame.data[0],
@@ -248,7 +249,7 @@ impl HwDecoderImage<'_> {
             ),
             AVPixelFormat::AV_PIX_FMT_YUV420P => {
                 hw::hw_i420_to(
-                    rgb.fmt,
+                    rgb.fmt(),
                     frame.width as _,
                     frame.height as _,
                     &frame.data[0],
diff --git a/libs/scrap/src/common/mediacodec.rs b/libs/scrap/src/common/mediacodec.rs
index eaaa0ddd7..9c64a4ace 100644
--- a/libs/scrap/src/common/mediacodec.rs
+++ b/libs/scrap/src/common/mediacodec.rs
@@ -50,9 +50,10 @@ impl MediaCodecDecoder {
         MediaCodecDecoders { h264, h265 }
     }
 
+    // rgb [in/out] fmt and stride must be set in ImageRgb
     pub fn decode(&mut self, data: &[u8], rgb: &mut ImageRgb) -> ResultType<bool> {
         // take dst_stride into account please
-        let dst_stride = rgb.stride;
+        let dst_stride = rgb.stride();
         match self.dequeue_input_buffer(Duration::from_millis(10))? {
             Some(mut input_buffer) => {
                 let mut buf = input_buffer.buffer_mut();
@@ -90,7 +91,7 @@ impl MediaCodecDecoder {
                 let u_ptr = buf[u..].as_ptr();
                 let v_ptr = buf[v..].as_ptr();
                 unsafe {
-                    match rgb.fmt {
+                    match rgb.fmt() {
                         ImageFormat::ARGB => {
                             I420ToARGB(
                                 y_ptr,
diff --git a/libs/scrap/src/common/mod.rs b/libs/scrap/src/common/mod.rs
index d57939e5e..80b4e7813 100644
--- a/libs/scrap/src/common/mod.rs
+++ b/libs/scrap/src/common/mod.rs
@@ -53,22 +53,32 @@ pub enum ImageFormat {
 
 pub struct ImageRgb {
     pub raw: Vec<u8>,
-    pub fmt: ImageFormat,
     pub w: usize,
     pub h: usize,
-    pub stride: usize,
+    fmt: ImageFormat,
+    stride: usize,
 }
 
 impl ImageRgb {
     pub fn new(fmt: ImageFormat, stride: usize) -> Self {
         Self {
             raw: Vec::new(),
-            fmt,
             w: 0,
             h: 0,
+            fmt,
             stride,
         }
     }
+
+    #[inline]
+    pub fn fmt(&self) -> ImageFormat {
+        self.fmt
+    }
+
+    #[inline]
+    pub fn stride(&self) -> usize {
+        self.stride
+    }
 }
 
 #[inline]
diff --git a/libs/scrap/src/common/vpxcodec.rs b/libs/scrap/src/common/vpxcodec.rs
index a64a1b05f..21d88ef0c 100644
--- a/libs/scrap/src/common/vpxcodec.rs
+++ b/libs/scrap/src/common/vpxcodec.rs
@@ -536,11 +536,11 @@ impl Image {
     pub fn to(&self, rgb: &mut ImageRgb) {
         rgb.w = self.width();
         rgb.h = self.height();
-        let bytes_per_row = Self::get_bytes_per_row(rgb.w, rgb.fmt, rgb.stride);
+        let bytes_per_row = Self::get_bytes_per_row(rgb.w, rgb.fmt, rgb.stride());
         rgb.raw.resize(rgb.h * bytes_per_row, 0);
         let img = self.inner();
         unsafe {
-            match rgb.fmt {
+            match rgb.fmt() {
                 ImageFormat::Raw => {
                     super::I420ToRAW(
                         img.planes[0],
diff --git a/src/flutter.rs b/src/flutter.rs
index 91962d5ea..f08b6a569 100644
--- a/src/flutter.rs
+++ b/src/flutter.rs
@@ -242,7 +242,7 @@ impl VideoRenderer {
                     rgba.raw.len() as _,
                     rgba.w as _,
                     rgba.h as _,
-                    rgba.stride as _,
+                    rgba.stride() as _,
                 )
             };
         }