Well, I just wanted to share my testing results which clearly proved that at least in my case temporal-smoother didn't help anything. It didn't help visual quality and of course my script is faster without it. Also average quant seems little bit lower when I encoded clips with Jonny's Divx enc tool both with same settings Divx 5.02 without b-frames, gmc or anything else. I used 2-pass 1025kbit. Script 1 (without TS): video=AviSource("E:\capture\capture.avi", false) audio = wavsource("E:\capture\capture.wav") video=audiodub(video,audio) video=ConvertToYV12(video) audio=delayaudio(audio,-0.1) #video=TemporalSoften(video,3,4,4,mode=2,scenechange=10) video=AutoCrop(video,0,wMultOf=4, hMultOf=4) video=bicubicresize(video,384,288,0,0.6) Video=deen(video,"a3d",3,6,1,6) Video=unfilter(Video,-5,-5) return(video) Avg Quant 4.99 Time 00:02:02 size 6,628k Script 2 (with TS): video=AviSource("E:\capture\capture.avi", false) audio = wavsource("E:\capture\capture.wav") video=audiodub(video,audio) video=ConvertToYV12(video) audio=delayaudio(audio,-0.1) video=TemporalSoften(video,3,4,4,mode=2,scenechange=10) video=AutoCrop(video,0,wMultOf=4, hMultOf=4) video=bicubicresize(video,384,288,0,0.6) Video=deen(video,"a3d",3,6,1,6) Avg Quant 5.29 Time 00:02:26 size 6,624k I captured with PicMjpeg qual 18 and resolution 384x576. And as you can see the first file contains Unfilter(-5,-5) but it is also faster little bit more than 30%