fix: use supported VAAPI quality mode on Jasper Lake

VERSION

@@ -1 +1 @@
-0.1.5
+0.1.6

preview.py

@@ -37,8 +37,9 @@ def main():
                         '-hwaccel_output_format', 'vaapi', '-extra_hw_frames', '8']
         video = ['-vf', 'fps=15,scale_vaapi=w=1920:h=1080:format=nv12:force_original_aspect_ratio=decrease:force_divisible_by=2',
                  '-c:v', 'h264_vaapi', '-profile:v', 'main', '-level:v', '4.1',
-                 '-rc_mode', 'VBR', '-b:v', '3500k', '-maxrate', '5000k',
-                 '-bufsize', '10000k', '-g', '30', '-bf', '0']
+                 # Jasper Lake can expose CQP only when HuC bitrate control is
+                 # unavailable; fixed quality does not require a firmware change.
+                 '-rc_mode', 'CQP', '-qp', '25', '-g', '30', '-bf', '0']
     else:
         video = ['-vf', 'fps=10,scale=768:432:force_original_aspect_ratio=decrease:force_divisible_by=2',
                  '-c:v', 'libx264', '-threads', '1', '-preset', 'veryfast',