Encode Time (AVISYNTH+CCE vs VIRTUALDUB+CCE)

[simps]

Hi all!

Well, i hope this can help you, if you are looking for this kinda info.
I made some tests, and i encoded one movie, with:

-Resizes
-Crops
-Subtitles

Using virtualdub to apply this 3 filters, and then frameserve to CCE, i got a 5:00 hours encode time.

Using avisynth to apply the same 3 filters, and then frameserve to CCE, i got a 1:30 hour encode time.


So, i concluded that avisynth for this case can be more then 3 times faster then virtualdub. (thats a lot, that can make a 24h encode drop to 7h or so).

Now, can anyone confirm this?
Is virtualdub this slow compared to avisynth because of some colorspace changes it makes?

Tkz!
[]'
Simps

[FOO]

1. Avisynth runs "in process" so data passes to and from it without a context switch.
2. Avisynth doesn't display anything.

[pijetro]

Is virtualdub this slow compared to avisynth because of some colorspace changes it makes?

Yes, it makes a huge difference..

[celtic_druid]

I wouldn't have expected a 300% speed gain, but you definatly should get a speed gain.

VDub means converting to RGB24, AVISynth can process the video in YV12, assuming that is that you have a YV12 source such as DVD, XviD, DivX, etc.