Avisynth speed?

[oddyseus]

Hello guys,

I want to report a strange phenomenon. I know that avisynth through mpeg2dec is a lot faster than vfapi. Anyway I am getting a .8x in a P4 1.8 from start that keeps droping to a .19x after a half an hour of encoding in CCE 2.64 allthough I am getting a steady .8x through vfapi methode.

Is there a logical explanation of this or what I am doing wrong?

[frank]

Where is your avs script? What's your OS?

[Didée]

Well, let´s assume your video is 1000 frames long ...
Now it depends on if you use multi-pass in CCE, and how many passes.
The default is 3-pass encoding, if I remember right. This amounts to a total of 4 passes, including the initial analyzation pass.
Thus the encoding sequence would be 4000 frames long - but the speed multiplier is calculated in relation to the original 1000 frames ...
Got it?
Or did I shoot in the wrong direction

[oddyseus]

Well your remarks were right of course. One cannot expect an answer not giving the data in return.

I am running XP pro, One pass vbr. The settings are indentical both on vfapi and mpeg2dec sessions with the same source files.

My avs script is as follows

LoadPlugin("c:\mpeg2dec\MPEG2DEC.dll")
mpeg2source("c:\jur\jur.d2v")