Hi all, first, this is my system: Video card: GF4 TI 4200 Driver version: 6.14 Output resolution: 1024x768 CPU: P4 3.0GHz Memory: 2x256 mb DDR OS: XP Home w/ SP2 Player:Zoom Player 4.02 Video Codec: DScaler 5 ouput YV12 Video Renderer: overlay Audio codec: AC3 filter v:1.01a Audio renderer: directsound: Realtek AC97 audio ffdshow version: 20040709 SSE_2 ffdshow filters used (in order) RAW VIDEO=YV12 1. Resize: 1024x768, lanzcos 2, luma sharpen 1.2 2. (output colorspace) YV12 with this minimal setup, after playing for around 30 seconds, I get stutter once every second (audio and video stutter). Tried several version of ffdshow and reclock, no luck. If I remove ffdshow from ZP it play smooth, no stutter! I like resize and luma sharpen in ffdshow for enhancing video output, but I can't accept stuttering. I want to use Denoise 3D but it generates more stutter. Any help to solve this problem, greatly appreciated. Is there any other program similar as ffdshow (resize and sharpen) which can work inside ZP? thank's Gunawan.