when playing back a avisynth script in media player is the motion supposed to be jerky or smooth?

iv noticed that on some of the xvids iv done the playback of the script in media player on some occasions it has been smooth and on others quite jerky

The playback in avisynth depends primary on your included processing routines/filters and therefore your CPU power.

So u are talking about script preview playback and NOT ready encoded mediafile (mpeg) playback ???

yeh script preview playback, when i just double click the script. some movies the motio has been smooth other not?

the script is the optimal one from the xvid conversion page,

i asked because some times my output video the motion has not been smooth. even when iv kept the standard the same (ntsc23.9 to ntsc 23.9).
i burned the file to dvd and played back on my computer but couldnt really notice it but when played on my tv i could see it was jerky on moving scenes

i know its only a small thing but its noticeable and is well annoying, any ideas what the problem may be incredible?
my source is good, very high quality xvid

Do you expect that the filters in the script are immediate ?
The encoding time won't be in hours if that was so fast.

In other word : YES, the playing is jerky.

I have the same problem on some Xvid - MPEG transcodes ....."jerkyness" .

But when I play the .avs file in BSplayer it plays smoothly (with subs / textsub)..........

???

If your script does nothign or your PC is extremly fast that's also normal.

Is is SO difficult to understand that filters are mathematical operations that needs CPU time to be processed ?

Note: even smooth, look at the rendered framerate. Chances are great that this is not 25 fps.

My CPU is an Athlon XP 2400 with 512 Mb RAM. Reasonably fast but not "extreme".

Of course I understand that we are talking about mathematical operations.......Just that I read in this thread that it's so normal for an .avs script to play back jerky in a media player.....

Don't know exactly what you mean but, in my case, it's a 25fps.

I really don't know what is your script but if you can play it at 25 fps (which resolution ?) your PC is definitely fast

....I played another .avs file directly in BSplayer at full screen (23.976fps 480x480) and it plays smooth .


(Playing it in Zoomplayer shows a split screen with green colored distorted image by the way..... ).

How to get Zoomplayer play the .avs properly ?

LoadPlugin("C:\PROGRA~1\DVD2SVCD\AVISYN~1.5PL\Mpeg 2dec\MPEG2D~1.DLL")
AVISource("D:\Everwood\EVERWO~4.AVI",False)
ConvertToYUY2()
BlindPP(cpu=4)
Blockbuster(method="noise",detail_min=1,detail_max =3,variance=0.1,seed=1)
Convolution3D(1, 6, 12, 6, 8, 2.8, 0)
GripCrop(480, 480+0+0, overscan=1, source_anamorphic=false, dest_anamorphic=false)
GripSize(resizer="LanczosResize")
Undot()
TemporalSoften(2,7,7,3,2)
DCTFilter(1,1,1,1,1,1,0.5,0)
GripBorders()
function ConvertToYUY2(clip c){ return isYV12(c) ? c : convertToYV12 (c) }

Your problem with zooplayer is probably due to a directshow filter taht is used. Probably ffdshow.
I have this sometimes and I rid of that by not allowing ffdshow to output in YUY2.