diff --git a/README.md b/README.md
index 3ccf518..4ad5bb0 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,8 @@ Fork自 https://github.com/GunwooHan/EasyVtuber
 并且省略了ifacialmocap pc端，通过UDP直连的方式使ios面捕刷新率达到30fps，解决了面捕刷新率的瓶颈  
 最后，将EasyVtuber中使用的OBS虚拟摄像头方案切换为Unity Capture，解锁RGBA输出能力，无需绿背即可直接使用
 
+[视频介绍和安装说明](https://www.bilibili.com/video/BV1uu411r7DR)  
+
 ## Requirements  
 
 ### 硬件  
@@ -87,6 +89,20 @@ https://github.com/pkhungurn/talking-head-anime-2-demo#download-the-model
 
 ### 输入输出设备  
 
+#### OBS Virtual Camera
+
+目前更推荐这个方案，UnityCapture存在未查明的性能瓶颈  
+如果你选择自己进行抠像你可以直接输出到obs，如果你需要RGBA支持则需要额外使用一个Shader  
+下载并安装StreamFX https://github.com/Xaymar/obs-StreamFX  
+下载Shader（感谢树根的协助） https://github.com/shugen002/shader/blob/master/merge%20alpha2.hlsl  
+之后，使用`--alpha_split`参数运行
+![alpha split](assets/alphasplit.png)  
+你会看到这样的输出画面，透明通道单独使用灰度方式发送了  
+之后对OBS中的视频采集设备添加滤镜-着色器-选择你下载的`merge alpha2.hlsl`-关闭   
+这样透明通道就应用回左边的图像了  
+你可能需要手动调整一下裁剪把右侧的无用画面切掉  
+(看不到着色器滤镜的话就是StreamFX没装好或者OBS不是最新版)
+
 #### UnityCapture  
 
 如果需要使用透明通道输出，参考 https://github.com/schellingb/UnityCapture#installation 安装好UnityCapture  
diff --git a/assets/alphasplit.png b/assets/alphasplit.png
new file mode 100644
index 0000000..1d04552
Binary files /dev/null and b/assets/alphasplit.png differ
diff --git a/obs_shader/merge alpha2.hlsl b/obs_shader/merge alpha2.hlsl
deleted file mode 100644
index 151a35f..0000000
--- a/obs_shader/merge alpha2.hlsl	
+++ /dev/null
@@ -1,43 +0,0 @@
-uniform float4x4 ViewProj<
-	bool automatic = true;
-	string name = "View Projection Matrix";
->;
-uniform texture2d InputA<
-	bool automatic = true;
->;
-
-uniform int mode;
-
-sampler_state textureSampler {
-	Filter   = Linear;
-	AddressU = Clamp;
-	AddressV = Clamp;
-};
-
-struct VertData {
-	float4 pos : POSITION;
-	float2 uv : TEXCOORD0;
-};
-
-VertData VSDefault(VertData vtx)
-{
-  vtx.pos = mul(float4(vtx.pos.xyz, 1.0), ViewProj);
-	return vtx;
-}
-
-float4 PSAlphaFilter(VertData vtx) : TARGET
-{
-  float2 uv = vtx.uv;
-  float3 pixel = InputA.Sample(textureSampler, float2(vtx.uv.x, vtx.uv.y)).rgb;
-  float alpha = InputA.Sample(textureSampler, float2(vtx.uv.x + 0.5, vtx.uv.y)).g;
-  return float4(clamp(pixel.rgb / alpha, 0.0, 1.0), alpha);
-}
-
-technique Draw
-{
-	pass
-	{
-		vertex_shader = VSDefault(vtx);
-		pixel_shader = PSAlphaFilter(vtx);
-	}
-}
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