diff --git a/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecSurfaceManager.cpp b/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecSurfaceManager.cpp
index 138c41d..bd9672b 100644
--- a/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecSurfaceManager.cpp
+++ b/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecSurfaceManager.cpp
@@ -388,16 +388,24 @@ bool MediaCodecSurfaceManager::CreateVulkanImage(void* vk_device, void* vk_insta
 
     ycbcrConversionCreateInfo.format = vulkan_format;
 
-    // Use MediaCodec suggested YCbCr model and range for all devices
-    ycbcrConversionCreateInfo.ycbcrModel = static_cast<VkSamplerYcbcrModelConversion>(ahb_format_props.suggestedYcbcrModel);
-    ycbcrConversionCreateInfo.ycbcrRange = static_cast<VkSamplerYcbcrRange>(ahb_format_props.suggestedYcbcrRange);
-    LogInfo("  Using MediaCodec suggested YCbCr model and range");
+    // WORKAROUND: Qualcomm MediaCodec may suggest incorrect YCbCr model for AV1
+    // Force BT.709 + Studio range on Qualcomm devices
+    if (is_qualcomm_gpu) {
+        ycbcrConversionCreateInfo.ycbcrModel = VK_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_709;  // BT.709
+        ycbcrConversionCreateInfo.ycbcrRange = VK_SAMPLER_YCBCR_RANGE_ITU_NARROW;           // Studio range (16-235)
+        LogInfo("  FORCED BT.709 + Studio range (Qualcomm workaround)");
+        LogInfo("  MediaCodec suggested model: " + std::to_string(ahb_format_props.suggestedYcbcrModel) + " (ignored)");
+        LogInfo("  MediaCodec suggested range: " + std::to_string(ahb_format_props.suggestedYcbcrRange) + " (ignored)");
+    } else {
+        ycbcrConversionCreateInfo.ycbcrModel = static_cast<VkSamplerYcbcrModelConversion>(ahb_format_props.suggestedYcbcrModel);
+        ycbcrConversionCreateInfo.ycbcrRange = static_cast<VkSamplerYcbcrRange>(ahb_format_props.suggestedYcbcrRange);
+        LogInfo("  Using MediaCodec suggested YCbCr model and range");
+    }
 
     // Log color space settings
     LogInfo("YCbCr conversion:");
-    LogInfo("  MediaCodec suggested model: " + std::to_string(ahb_format_props.suggestedYcbcrModel));
-    LogInfo("  MediaCodec suggested range: " + std::to_string(ahb_format_props.suggestedYcbcrRange));
-    LogInfo("  Using MediaCodec suggested color space settings");
+    LogInfo("  YcbcrModel: " + std::to_string(ycbcrConversionCreateInfo.ycbcrModel));
+    LogInfo("  YcbcrRange: " + std::to_string(ycbcrConversionCreateInfo.ycbcrRange));
 
     // Log component mapping from MediaCodec
     LogInfo("  MediaCodec suggested components:");