Video player as texture, can't set tiling

Question

I am developing a stereoscopic 360 video player to play 3d 360 videos. I have a 2k test video that has a horizontal split separating the two sources. My plan is to render this using a video player component on a couple of unity spheres which will be shown to each eye via layers. To make each sphere play the right portion of the video I planed to use separate materials for each sphere with the left one having tiling and offset of 0.5 on the y axis and the right one having 0.5 tiling and 0 on offset. When I run the player though the tiling sets itself to 1 and reverts back to my settings when the player turns off.

Is this a feature of the video texture that I'm misunderstanding? How do I set the tiling on my video texture?

UPDATE: I've made some progress, I noticed that when the video starts playing it was inserting a generated texture into the spheres shader so I manually made a render texture in my assets folder, assigned it to the shader and also assigned it as the target texture of the video player (nice side benefit of this is I only need 1 video player). Now the settings don't reset, they just don't do anything. The values stay in place when I play the video but the video is still showing everything rather than just the top and bottom half (one in each sphere that is) as I was expecting. I'm half way here now, if anyone can give me a nudge in the right direction I'd really appreciate it.

Answer 1

i have the same problem but i somehow solved it by scripting the shader.

i created a new float4 Vector and multiply the xy to the tiling, and add the zw to the offset. It works successfully but i used separate materials for 2 sphere.

I am new to Unity and Shader so this is the only way i could think of.

Here is my shader code:

 Shader "Unlit/newShader"
 {
     Properties
     {
         _MainTex ("Texture", 2D) = "white" {}
         _Vector ("myVector", Vector) = (1,1,0,0)
     }
     SubShader
     {
         Tags { "RenderType"="Opaque" }
         LOD 100
 
         Pass
         {
 
             Cull Front
 
             CGPROGRAM
             #pragma vertex vert
             #pragma fragment frag
             // make fog work
             #pragma multi_compile_fog
             
             #include "UnityCG.cginc"
 
             sampler2D _MainTex;
             float4 _MainTex_ST;
             float4 _Vector;
 
             struct appdata
             {
                 float4 vertex : POSITION;
                 float2 uv : TEXCOORD0;
             };
 
             struct v2f
             {
                 float2 uv : TEXCOORD0;
                 UNITY_FOG_COORDS(1)
                 float4 vertex : SV_POSITION;
             };
 
             
             
             v2f vert (appdata v)
             {
                 v2f o;
                 o.vertex = UnityObjectToClipPos(v.vertex);
                 //o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                 UNITY_TRANSFER_FOG(o,o.vertex);
 
                 _MainTex_ST.x = _MainTex_ST.x * _Vector.x;
                 _MainTex_ST.y = _MainTex_ST.y * _Vector.y;
                 _MainTex_ST.z = _MainTex_ST.z + _Vector.z;
                 _MainTex_ST.w = _MainTex_ST.w + _Vector.w;
 
                 o.uv =  v.uv.xy * _MainTex_ST.xy + _MainTex_ST.zw;
 
                 return o;
             }
             
             fixed4 frag (v2f i) : SV_Target
             {
                 // sample the texture
                 fixed4 col = tex2D(_MainTex, i.uv);
                 // apply fog
                 UNITY_APPLY_FOG(i.fogCoord, col);
                 return col;
             }
             ENDCG
         }
     }
 }

alt text

Just change the value in the myVector and it will do the tiling and offset.

I hope this helps.

Video player as texture, can't set tiling

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