diff --git a/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecAV1Decoder.cpp b/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecAV1Decoder.cpp
index 9a10d92..899641d 100644
--- a/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecAV1Decoder.cpp
+++ b/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecAV1Decoder.cpp
@@ -745,6 +745,13 @@ bool MediaCodecAV1Decoder::InitializeMediaCodec() {
     AMediaFormat_setInt32(m_format, AMEDIAFORMAT_KEY_COLOR_FORMAT, 0x7F420888);
     LogInfo("Set MediaCodec output format: COLOR_FormatYUV420Flexible (0x7F420888)");
 
+    // CRITICAL: Set color space parameters for correct YUV interpretation
+    // Most HD videos use BT.709 color standard with studio range (16-235)
+    // COLOR_STANDARD_BT709 = 1, COLOR_RANGE_LIMITED = 2
+    AMediaFormat_setInt32(m_format, "color-standard", 1);  // BT.709
+    AMediaFormat_setInt32(m_format, "color-range", 2);     // Limited/Studio range
+    LogInfo("Set MediaCodec color space: BT.709 + Limited range");
+
     // Set codec specific data (csd-0) - CRITICAL for AV1 decoding
     // This contains the AV1 sequence header from WebM CodecPrivate
     if (!m_codec_private_data.empty()) {
diff --git a/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecSurfaceManager.cpp b/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecSurfaceManager.cpp
index bebaff1..51cd33c 100644
--- a/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecSurfaceManager.cpp
+++ b/vav2/platforms/windows/vavcore/src/Decoder/MediaCodecSurfaceManager.cpp
@@ -288,6 +288,35 @@ bool MediaCodecSurfaceManager::CreateVulkanImage(void* vk_device, void* vk_insta
     LogInfo("AHardwareBuffer desc: " + std::to_string(ahb_desc.width) + "x" +
             std::to_string(ahb_desc.height) + " format=" + std::to_string(ahb_desc.format));
 
+    // DEBUG: Lock AHardwareBuffer and read first few pixels to verify data format
+#ifdef _DEBUG
+    static int debug_frame_count = 0;
+    if (debug_frame_count < 3) {  // Only log first 3 frames
+        void* data = nullptr;
+        int ret = AHardwareBuffer_lock(ahb, AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN, -1, nullptr, &data);
+        if (ret == 0 && data != nullptr) {
+            uint8_t* pixels = static_cast<uint8_t*>(data);
+
+            // Sample pixel at (100, 100) - should be in sky (red in correct image)
+            uint32_t offset_y = 100 * ahb_desc.stride + 100;
+            uint32_t offset_uv = (ahb_desc.width * ahb_desc.height) + (50 * ahb_desc.stride) + 100;  // NV12 UV plane
+
+            LogInfo("=== PIXEL DATA DEBUG (frame " + std::to_string(debug_frame_count) + ") ===");
+            LogInfo("  Pixel (100,100) Y plane:");
+            LogInfo("    pixels[" + std::to_string(offset_y) + "] = " + std::to_string((int)pixels[offset_y]));
+            LogInfo("  Pixel (50,50) UV plane (chroma):");
+            LogInfo("    pixels[" + std::to_string(offset_uv) + "] = " + std::to_string((int)pixels[offset_uv]) + " (U)");
+            LogInfo("    pixels[" + std::to_string(offset_uv + 1) + "] = " + std::to_string((int)pixels[offset_uv + 1]) + " (V)");
+            LogInfo("  stride: " + std::to_string(ahb_desc.stride));
+
+            AHardwareBuffer_unlock(ahb, nullptr);
+            debug_frame_count++;
+        } else {
+            LogError("Failed to lock AHardwareBuffer for pixel inspection: " + std::to_string(ret));
+        }
+    }
+#endif
+
     // Step 2: Query Android Hardware Buffer properties for Vulkan
     VkAndroidHardwareBufferFormatPropertiesANDROID ahb_format_props = {};
     ahb_format_props.sType = VK_STRUCTURE_TYPE_ANDROID_HARDWARE_BUFFER_FORMAT_PROPERTIES_ANDROID;