Encoding speed in VirtualDubMod

[Menion2k]

Hi boys. I uslually encode movies in virtualdubmod, for the support of OGM files. I have an Athlon XP 2700+, 512Mb DDR 333Mhz, WinXP professional. I think it is quite strange that I have 12/13fps of encoding speed with this settings:
Movie: 640x356 MPEG2 imported with Avisynth 2.5.1 official beta (tried the different MPEG2 plugins)
Fast recompress
Encoding setting: 2pass, Ultra High, VHQ=0, Qpel, Chroma, Bframes=3,150,100,0, Lumimasking in the second pass.
I tried also to manually set the SS",3Dnow,etc... It's normal, or I have some problem with WirtualdubMod/Xvid? Bye!

[N_F]

Unless you're using some heavy filters you didn't specify you should get a much faster speed. My computer is half as fast (on paper anyway) than yours and I'm still having better speeds than that.

[sam_b]

Sounds a bit slow, even with lumi (which you should use in both passes BTW). I'd expect to get that with my souped up 1700+. What does task manager say?

[kxy]

I dont think it is slow. Using AMD 1700+ with VHQ=4, no b-frame, getting 4-5 fps. Why would you want it to go fast? Would you rather it produce a good rip?

[Menion2k]

I don't use any heavy filter in avisynth, and I also think it is a quite low speed. I'll try another software con work together with xvid in compression. Is there another program that can manage avisynth source and can cut scenes INSIDE the movie, not aonly at the beginning and at the end? Bye!

[Assault]

@Menion2k

avs2avi can't cut scenes but you could compare its speed to virtualdubmod's. avs2avi is the fastest encoding tool I know.

Regards
Assault

[TelemachusMH]

Originally posted by kxy
I dont think it is slow. Using AMD 1700+ with VHQ=4, no b-frame, getting 4-5 fps. Why would you want it to go fast? Would you rather it produce a good rip?
That's a really slow speed. I have an XP 2000+ and I get 23-26 fps 640x??? and I can assure you, my encodes are good quality.

TelemachusMH

btw .... VHQ=4?! How can you be getting good results with that? It always looks horible if I go over 1.

[Menion2k]

[QUOTE]Originally posted by TelemachusMH
[B]That's a really slow speed. I have an XP 2000+ and I get 23-26 fps 640x??? and I can assure you, my encodes are good quality.

What program do you use for the encoding?

[Selur]

It's VHQ(4) that slows the encoding down so much,.. :D
With VHQ(1) I get something like 23fps+
and wit VHQ(4) something like 6-7fps, so it divides the speed by something like 3 :D

[TelemachusMH]

I use Avisynth 2.5.1, VirtualDubMod in YV12 for my encodes.

TelemachusMH

[seewen]

@Menion2k

You din't explain what filter you're using..

If you use LanczosResize, so it's maybe normal. Try using FastBilinearResize, FastBicubicResize, BicublinResize or even SimpleResize.

and when you crop, do you use Mod2, Mod4, Mod8, etc.. Res ? It can be slower with Mod2 compare to Mod 16 ( after cropping.. ).

etc..

[Menion2k]

I tried fastbicubin resize, but the speed is quite the same. Ma output resolution is Mod4. Next I'll try Mod8 and Mod16. Bye!

[TheXung]

I think your speed is fine. I just think all the people posting 20+ fps speeds aren't posting all of their settings.

There are quality freaks and there are speed freaks. Getting XviD to run at 20+ fps does not degrade quality that much, so of course 20+ fps encodes will look good as well.

[jarthel]

setup is in my sig
---------
Here's the avs script

LoadPlugin("D:\downloads\windows\utilities\divx\avisynth\plugins25\MPEG2Dec3.dll")
LoadPlugin("D:\downloads\windows\utilities\divx\avisynth\plugins25\Convolution3DYV12.dll")
LoadPlugin("D:\downloads\windows\utilities\divx\avisynth\plugins25\Decomb.dll")

body=mpeg2source("e:\dvdrips\nadesico13\nadesico13.d2v",idct=5,cpu=6,iPP=true).crop(18,4,684,568).FieldDeinterlace().TemporalSoften(1,5,0).Convolution3d(preset="animeHQ").lanczosresize(640,480)


return body
-----------------

Xvid settings are

quantization type=h.263
VHQ=1
lumamasking=enabled
quarterpel=enabled
no b-frames
---------------

I get around 8 to 11 fps. it's not too bad 'cause I run my encodes overnight and during the day when I'm at work.

Jayel

[kxy]

Why are you guys against VHQ=4 if you are doing the 2 pass?

This is what koepi said in the VHQ thread.
If you use VHQ at level 1, you won't get any smaring or similar artefacts. Those artefacts can be introduced by VHQ mode 2-4, but they're less noticable in full 2pass scenarios - the overall quality is still better.

[TelemachusMH]

I haven't tried VHQ with koepi's newest build (08032003-1) but I did try it in 2-pass mode with all five different VHQ settings in koepi's previous build, and the output for VHQ=2,3, and 4 had very noticable streaks anytime something moved on screen. These also stayed there until the next keyframe too, unless something moved off screen at the same place. It is something that I just couldn't bare to watch, it hurt me to see it. :D Anyway it also slowed the encoding process down by a great deal, so I just don't use VHQ over 1. It's just a matter of personal taste for me.

TelemachusMH

[TheXung]

I think if you're pushing the envelope of ASP mpeg4, of course you're going to introduce "new types of artifacting" to gain greater detail. We live with macroblocking yet we're not willing to live with a little texture moving or streaking? I mean seriously, people put up with so much macroblocking, picture smoothing and other traditional video degradation yet not a little texture moving just because they're not use to it. VHQ4 artifacting is just something to get use to.

All for the greater detail.

[((( atom )))]

i also think to have noticed drastic speed redudtion on my system for no obvious reson.

i remember to have almost hit the 20fps not so long ago and atm i encode at around 8fps.
i tried to take out all the settings out that are known to reduce speed but didn't get any higher that 15fps.
next thing i did is check the speed of watching the pure avisynth-output (without encoding) and even then i only hit around 20fps, while remembering that i used to have around 30fps..

could it be, that encoding (or even the decoding in the first place) slows down as windows grows older? this shouldn`t actually be possible, right?

could some of you guys maybe try and check your speeds with the [file]->[preview] function in vdub/mod? that would really be interresting?

my system btw is an athlon 2000+ with 500megs of ram under win2k.