XviD Video rendering rate with Core 2 Duo

[Jip]

I just switched from an Athlon XP 2200+ to an Intel Core 2 Duo 6300. I expected to get higher rendering rates for XviD encoding, but they are all most the same. I use the XviD MT version and put threads on 2. The frame rate I get in the first pass is around 30 fps and in the second pass it’s 25 fps. I use an mpeg2 file as source in VirtualDubMOD.

I wonder if this is normal or that I’m doing something completely wrong. Are there any people who have better frame rates or have any advice?

Thanks in advance!

[Manao]

What are the encoding settings ? What is the resolution ? Where did you get the XviD build ? How much speed difference is there between one and two threads on the Duo Core ? Were you loading an avs script or directly the mpeg2 file ? If there was an avs script, can you paste it there ?

I doubt the results you're getting are normal, but without those information, it's only a gut feeling.

[Jip]

Mmm… your questions all ready made me think.
What I did was drop the mpeg file directly in VirtualDubMOD, add deinterlace and resize filter and set XviD to 1-pass and 2-pass and started the jobs.
Now I’ve created an AVS file with help of GKnot, first pass gives me 70 fps, second one 35 fps. I think that’s more like it! :)

When I set threads to 1, I get first pass 40-50 fps and second 20-30.

XviD version: 1.2-127 (Koepi's CVS Build)

Here is the AVS file, maybe it can be even better?


# Created with Gordian Knot
#
# http://gknot.doom9.org

# PLUGINS
LoadPlugin("C:\PROGRA~1\GORDIA~1\DGMPGDec\DGDecode.dll")
#LoadPlugin("C:\PROGRA~1\GORDIA~1\AviSynthPlugins\decomb.dll")
#LoadPlugin("C:\PROGRA~1\GORDIA~1\AviSynthPlugins\KernelDeInt.dll")
LoadPlugin("C:\PROGRA~1\GORDIA~1\AviSynthPlugins\UnDot.dll")
#LoadPlugin("C:\PROGRA~1\GORDIA~1\AviSynthPlugins\dgbob.dll")
#LoadPlugin("C:\PROGRA~1\GORDIA~1\AviSynthPlugins\Convolution3d.dll")
#LoadPlugin("C:\PROGRA~1\GORDIA~1\AviSynthPlugins\FluxSmooth.dll")
#LoadPlugin("C:\PROGRA~1\GORDIA~1\AviSynthPlugins\TomsMoComp.dll")
#LoadPlugin("C:\PROGRA~1\GORDIA~1\AviSynthPlugins\VSFilter.dll")
#LoadPlugin("C:\PROGRA~1\GORDIA~1\AviSynthPlugins\SimpleResize.dll")

# SOURCE
mpeg2source("D:\--=Montage\temp\M2U00019-1.d2v")

# TRIM
#trim(startframe,endframe)

# IVTC
#Telecide(order=1,guide=1).Decimate()
# or use
#IVTC(44,11,95)
#GreedyHMA(1,0,4,0,0,0,0,0)

# DEINTERLACING (1)
#FieldDeinterlace()
#FieldDeinterlace(blend=false)
#TomsMoComp(1,5,1)

# DEINTERLACING (2)
#KernelDeInt(order=1,sharp=true)
# or maybe
#DGBob(order=1,mode=0)

# DEINTERLACING (3) - special requests
#GreedyHMA(1,0,0,0,0,0,0,0)
#Telecide()
#SeparateFields()

# CROPPING
crop(0,0,718,572)

# SUBTITLES
#VobSub("FileName")

# RESIZING
LanczosResize(640,352)

# DENOISING: choose one combination (or none)
Undot()

# 1) little noise
#Temporalsoften(2,3,3,mode=2,scenechange=6)
#mergechroma(blur(1.3))
#FluxSmoothST(5,7)

# 2) medium noise
#Temporalsoften(3,5,5,mode=2,scenechange=10)
#Convolution3d("moviehq")
#FluxSmoothST(7,7)

# 3) heavy noise
#Temporalsoften(4,8,8,mode=2,scenechange=10)
#Convolution3d("movielq")
#FluxSmoothST(10,15)

# BORDERS
#AddBorders(left,top,right,bottom)

# COMPRESSIBILITY CHECK
# !!!!Snip Size now has to be 14 for use in GKnot!
#SelectRangeEvery(280,14)

# FOOL CCEnc
#empty = BlankClip()
#AudioDub(last,empty)

[Manao]

Several things still :
- you forgot the encoding settings
- you deinterlaced with virtualdubmod, but the avisynth script you pasted doesn't deinterlace
- you might want to use virtualdub 1.6 instead of virtualdubmod ( vdub 1.6 read the input in a separate thread, perhaps vdubmod doesn't - actually i don't know )

The speed increase for the second pass should be greater than the speed increase in the first pass, so i think there's still a problem somehow.

[idiotunes]

question;

is 9-14fps normal for Xvid on a 3.06ghz P4 HT with 1GB Ram? VHQ and MSP are on max as well, turbo mode is on, chroma, and vhq for b frames , AQ is on, Qpel is on, GMC is off, chroma optimiser is on, and encoding @ q3 single pass, encoding resolution is 720x416

[iNFO-DVD]

is 9-14fps normal for.............
Not all the setting where given but I tried to copy that as much as possible (using a 3GHz P4 HT) and yes, your FPS seems right.

[idiotunes]

hmm, ok

would multithreaded xvid help me any?

[iNFO-DVD]

To be honest I've tried it a couple of times and not gained any speed at all, maybe it's just for real duals, dunno????

[henryho_hk]

question;

is 9-14fps normal for Xvid on a 3.06ghz P4 HT with 1GB Ram? VHQ and MSP are on max as well, turbo mode is on, chroma, and vhq for b frames , AQ is on, Qpel is on, GMC is off, chroma optimiser is on, and encoding @ q3 single pass, encoding resolution is 720x416

VHQ=4 is a speed killer.

Try:

Matrix=6of9 or HRv3
Turbo=Off
Trellis=On
MSP=6
VHQ=1
VHQ for B=On
AQ=Off
Chroma Optimizer=On
Chroma Motion=On
QPel=On
GMC=Off
Single Pass Q=4

Resize-then-Deinterlace is horrible. My usual practice is Field Based Deblock -> Deinterlace -> Crop&Resize -> Denoise, all inside Avisynth.

[idiotunes]

i've found that de-interlace artifacting isnt as bad if i blow the picture up to 1024x576 and crop from there.

though i get awful rendering rates, 6-8fps

[idiotunes]

henryho, what kind of file size average does that do?
i use q3 because anything below that always looked somewhat blocky to me. what effect can happen by lowering VHQ?

[henryho_hk]

henryho, what kind of file size average does that do?

I don't know the average size either. The filesize is a product of the source material's complexity, the encoder settings (bitrates/quantizers, matrices, etc.) and your desired quality (resolution, clarity, etc.). Every encode is a struggle between these factors. ;)

Teegdeck has shown us some excellent presets. Your can utilize them through MeGUI. The idea is to use a 5% compression test to check the source complexity again a desired bitrate. Then based on the compr test result, choose a suitable 2-pass XviD setting. I would call it a 2.05 pass XviD encode. :cool:

For your 720x410 encodes, I think 1600kbps is a good starting point and I guess it would probably has a comp test score of 45~40. Just remember to keep all deinterlace, resize, denoise, etc. steps in AVISynth.