diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
index b830c9b56d..2445665e42 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
@@ -4925,28 +4925,41 @@ namespace MediaBrowser.Controller.MediaEncoding
                 {
                     if (IsCrtShaderEnabled(state))
                     {
-                        // VAAPI → OpenCL → CRT (NV12) → VAAPI (reverse=1) → QSV.
-                        // Shader now works in NV12 throughout (no scale_opencl format break),
-                        // so program_opencl output stays in the VAAPI-linked OpenCL pool.
-                        // reverse=1 to VAAPI mirrors the doOclTonemap+isVaInVaOut path.
-                        mainFilters.Add("hwmap=derive_device=opencl:mode=read");
+                        // VAAPI → CPU → OpenCL (writable) → CRT (NV12) → CPU → QSV.
+                        // program_opencl inherits the hw frames context from its input link.
+                        // If that context was created via hwmap:mode=read, the output images are
+                        // CL_MEM_READ_ONLY and kernel writes are silently discarded (black output).
+                        // Solution: hwdownload+hwupload=derive_device=opencl creates a fresh
+                        // writable OpenCL context, matching Jellyfin's iHD doOclTonemap pattern.
+                        mainFilters.Add("hwdownload");
+                        mainFilters.Add("format=nv12");
+                        mainFilters.Add("hwupload=derive_device=opencl");
                         mainFilters.AddRange(GetCrtShaderOclFilters(state));
-                        mainFilters.Add("hwmap=derive_device=vaapi:mode=write:reverse=1");
-                        mainFilters.Add("format=vaapi");
+                        mainFilters.Add("hwdownload");
+                        mainFilters.Add("format=nv12");
+                        mainFilters.Add("hwupload");
+                        mainFilters.Add("format=qsv");
+                    }
+                    else
+                    {
+                        // VAAPI → QSV (zero-copy, shared libva surface)
+                        mainFilters.Add("hwmap=derive_device=qsv");
+                        mainFilters.Add("format=qsv");
                     }
-
-                    // VAAPI → QSV (zero-copy, shared libva surface) [both paths]
-                    mainFilters.Add("hwmap=derive_device=qsv");
-                    mainFilters.Add("format=qsv");
                 }
                 else if (isQsvDecoder)
                 {
                     if (IsCrtShaderEnabled(state))
                     {
-                        // QSV → OpenCL → CRT → QSV (reverse=1)
-                        mainFilters.Add("hwmap=derive_device=opencl:mode=read");
+                        // QSV → CPU → OpenCL (writable) → CRT (NV12) → CPU → QSV.
+                        // Same reason as isVaapiDecoder: avoid read-only output pool.
+                        mainFilters.Add("hwdownload");
+                        mainFilters.Add("format=nv12");
+                        mainFilters.Add("hwupload=derive_device=opencl");
                         mainFilters.AddRange(GetCrtShaderOclFilters(state));
-                        mainFilters.Add("hwmap=derive_device=qsv:mode=write:reverse=1:extra_hw_frames=16");
+                        mainFilters.Add("hwdownload");
+                        mainFilters.Add("format=nv12");
+                        mainFilters.Add("hwupload");
                         mainFilters.Add("format=qsv");
                     }
                 }