diff --git a/videoarchiver/ffmpeg/encoder_params.py b/videoarchiver/ffmpeg/encoder_params.py
index a04267d..d58e699 100644
--- a/videoarchiver/ffmpeg/encoder_params.py
+++ b/videoarchiver/ffmpeg/encoder_params.py
@@ -14,36 +14,36 @@ class EncoderParams:
     QUALITY_PRESETS = {
         "gaming": {
             "crf": "20",
-            "preset": "fast",
+            "preset": "p4",  # NVENC preset
             "tune": "zerolatency",
             "x264opts": "rc-lookahead=20:me=hex:subme=6:ref=3:b-adapt=1:direct=spatial"
         },
         "animation": {
             "crf": "18",
-            "preset": "slow",
+            "preset": "p7",  # NVENC preset
             "tune": "animation",
             "x264opts": "rc-lookahead=60:me=umh:subme=9:ref=6:b-adapt=2:direct=auto:deblock=-1,-1"
         },
         "film": {
             "crf": "22",
-            "preset": "medium",
+            "preset": "p6",  # NVENC preset
             "tune": "film",
             "x264opts": "rc-lookahead=50:me=umh:subme=8:ref=4:b-adapt=2:direct=auto"
         }
     }
 
+    # NVENC specific presets
+    NVENC_PRESETS = ["p1", "p2", "p3", "p4", "p5", "p6", "p7"]
+    # CPU specific presets
+    CPU_PRESETS = ["ultrafast", "superfast", "veryfast", "faster", "fast", "medium", "slow", "slower", "veryslow"]
+
     # Minimum bitrates to ensure quality
     MIN_VIDEO_BITRATE = 500_000  # 500 Kbps
     MIN_AUDIO_BITRATE = 64_000   # 64 Kbps per channel
     MAX_AUDIO_BITRATE = 192_000  # 192 Kbps per channel
 
     def __init__(self, cpu_cores: int, gpu_info: Dict[str, bool]):
-        """Initialize encoder parameters manager
-        
-        Args:
-            cpu_cores: Number of available CPU cores
-            gpu_info: Dict containing GPU availability information
-        """
+        """Initialize encoder parameters manager"""
         self.cpu_cores = cpu_cores
         self.gpu_info = gpu_info
         logger.info(f"Initialized encoder with {cpu_cores} CPU cores and GPU info: {gpu_info}")
@@ -64,6 +64,9 @@ class EncoderParams:
             gpu_params = self._get_gpu_specific_params()
             if gpu_params:
                 params.update(gpu_params)
+                # Convert CPU preset to GPU preset if using NVENC
+                if params.get("c:v") == "h264_nvenc" and params.get("preset") in self.CPU_PRESETS:
+                    params["preset"] = "p6"  # Default to p6 for NVENC
                 logger.debug(f"GPU-specific parameters: {gpu_params}")
 
             # Calculate and update bitrate parameters
@@ -105,7 +108,11 @@ class EncoderParams:
         # Detect content type
         content_type = self._detect_content_type(video_info)
         if content_type in self.QUALITY_PRESETS:
-            params.update(self.QUALITY_PRESETS[content_type])
+            preset_params = self.QUALITY_PRESETS[content_type].copy()
+            # Don't copy preset if we're using NVENC
+            if self.gpu_info.get("nvidia", False):
+                preset_params.pop("preset", None)
+            params.update(preset_params)
 
         # Additional optimizations based on content analysis
         if video_info.get("has_high_motion", False):
@@ -128,7 +135,7 @@ class EncoderParams:
         if self.gpu_info.get("nvidia", False):
             return {
                 "c:v": "h264_nvenc",
-                "preset": "p7",
+                "preset": "p6",  # Use NVENC preset
                 "rc:v": "vbr",
                 "cq:v": "19",
                 "b_ref_mode": "middle",
@@ -195,19 +202,19 @@ class EncoderParams:
                 "ac": str(audio_channels)
             })
 
-            # Adjust CRF based on target size
+            # Adjust quality based on target size
             input_bitrate = int(video_info.get("bitrate", 0))
             if input_bitrate > 0:
                 compression_ratio = input_bitrate / video_bitrate
                 if compression_ratio > 4:
                     params["crf"] = "26"
-                    params["preset"] = "faster"
+                    params["preset"] = "p4" if self.gpu_info.get("nvidia", False) else "faster"
                 elif compression_ratio > 2:
                     params["crf"] = "23"
-                    params["preset"] = "medium"
+                    params["preset"] = "p6" if self.gpu_info.get("nvidia", False) else "medium"
                 else:
                     params["crf"] = "20"
-                    params["preset"] = "slow"
+                    params["preset"] = "p7" if self.gpu_info.get("nvidia", False) else "slow"
 
             logger.info(f"Calculated bitrates - Video: {video_bitrate}bps, Audio: {audio_bitrate}bps")
             return params
@@ -254,10 +261,13 @@ class EncoderParams:
             if params["c:v"] not in ["libx264", "h264_nvenc", "h264_amf", "h264_qsv"]:
                 raise ValueError(f"Invalid video codec: {params['c:v']}")
 
-            # Validate preset
-            valid_presets = ["ultrafast", "superfast", "veryfast", "faster", "fast", "medium", "slow", "slower", "veryslow", "p1", "p2", "p3", "p4", "p5", "p6", "p7"]
-            if params["preset"] not in valid_presets:
-                raise ValueError(f"Invalid preset: {params['preset']}")
+            # Validate preset based on codec
+            if params["c:v"] == "h264_nvenc":
+                if params["preset"] not in self.NVENC_PRESETS:
+                    raise ValueError(f"Invalid NVENC preset: {params['preset']}")
+            elif params["c:v"] == "libx264":
+                if params["preset"] not in self.CPU_PRESETS:
+                    raise ValueError(f"Invalid CPU preset: {params['preset']}")
 
             # Validate pixel format
             if params["pix_fmt"] not in ["yuv420p", "nv12", "yuv444p"]: